36fb459bd9
Update ExhaustiveSwitch so that it compiles with java 20. "case default" is not allowed anymore.
2719 lines
82 KiB
Plaintext
2719 lines
82 KiB
Plaintext
/**
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* Support "JEP 427: Pattern Matching for switch (Third Preview)" for Java 19 Preview
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* Note: GuardedPattern is deprecated and only valid for 17-preview and 18-preview
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* New AST node: ASTSwitchGuard (production "Guard") - used within switch case labels for refining a pattern
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* Support "JEP 405: Record Patterns (Preview)" for Java 19 Preview
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* New AST node: ASTRecordPattern and ASTComponentPatternList (production "RecordStructurePattern")
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* Remove support for Java 17 preview language features
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* Andreas Dangel 07/2022
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*====================================================================
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* Support "JEP 420: Pattern Matching for switch (Second Preview)" for Java 18 Preview
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* There were no grammar changes between 18-preview and 17-preview
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* Remove support for Java 16 preview language features
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* Andreas Dangel 03/2022
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*====================================================================
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* Promote "JEP 409: Sealed Classes" as permanent language feature with Java 17.
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* Support "JEP 406: Pattern Matching for switch (Preview)" for Java 17 Preview.
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* Remove support for Java 15 preview language features
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* Andreas Dangel 07/2021
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*====================================================================
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* Fix #3117 - infinite loop when parsing invalid code nested in lambdas
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* Andreas Dangel 03/2021
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*====================================================================
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* Fix #3145 - parse exception with local records
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* Clément Fournier 03/2021
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*====================================================================
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* Remove support for Java 14 preview language features
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* JEP 397: Sealed Classes (Second Preview) for Java16 Preview
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* JEP 395: Records for Java16
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* JEP 394: Pattern Matching for instanceof for Java16
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* Andreas Dangel 02/2021
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*====================================================================
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* Remove support for Java 13 preview language features.
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* Promote text blocks as a permanent language features with Java 15.
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* Support Pattern Matching for instanceof with Java 15 Preview.
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* Support Records with Java 15 Preview.
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* Support Local Records with Java 15 Preview.
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* Support Sealed Classes with Java 15 Preview.
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* Andreas Dangel 08/2020
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*====================================================================
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* Add support for record types introduced as a preview language
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* feature with Java 14. See JEP 359.
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* Andreas Dangel 02/2020
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*====================================================================
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* Add support for pattern matching for instance of introduced
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* as a preview language feature with Java 14. See JEP 305.
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* Clément Fournier 02/2020
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*====================================================================
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* Switch Expressions are now a standard feature of Java 14.
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* Andreas Dangel 02/2020
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*====================================================================
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* Add support for the yield statement introduced as a preview language
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* feature with Java 13. See JEP 354.
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* Add support for text block literals introduces as a preview language
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* feature with Java 13. See JEP 355.
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* Andreas Dangel 08/2019
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*====================================================================
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* Fix #1848 Local classes should preserve their modifiers
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* Clément Fournier 05/2019
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*====================================================================
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* Add support for Java 12 switch expressions and switch rules.
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* Andreas Dangel, Clément Fournier 03/2019
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*====================================================================
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* Add support for Java 10 Local Variable Type Inference
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* See #743. In Java 10 mode, "var" as local variable type is handled special.
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* Andreas Dangel 04/2018
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*====================================================================
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* Fixes #888 [java] ParseException occurs with valid '<>' in Java 1.8 mode
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* Juan Martin Sotuyo Dodero 01/2018
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*====================================================================
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* Fixes #793 [java] Parser error with private method in nested classes in interfaces
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* Andreas Dangel 12/2017
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*====================================================================
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* Add support for Java 9 changes:
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* Private interface methods are only allowed with java9.
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* A single underscore "_" is an invalid identifier in java9.
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* Diamond operator for anonymous classes is only allowed with java9.
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* Add support for module-info.java.
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* Allow more concise try-with-resources statements with java9.
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* Andreas Dangel 09/2017
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*====================================================================
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* Add support for new Java 8 annotation locations.
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* Bugs #414, #415, #417
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* @Snap252 06/2017
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*====================================================================
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* Allow empty statements (";") between package, import
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* and type declarations.
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* Bug #378
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* Andreas Dangel 05/2017
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*====================================================================
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* Allow method references to specify generics also for
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* constructor references ("new").
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* Bug #309
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* Andreas Dangel 03/2017
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*====================================================================
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* Provide a better fix for CastExpression, getting rid of most hacks.
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* Bug #257
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*
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* Juan Martin Sotuyo Dodero 02/2017
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*====================================================================
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* Allow local classes to carry more than one annotation.
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* Bug #208
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*
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* Juan Martin Sotuyo Dodero 01/2017
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*====================================================================
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* Change lookahead for AnnotationMethodDeclaration in AnnotationTypeMemberDeclaration.
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* Bug #206
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*
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* Juan Martin Sotuyo Dodero 01/2017
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*====================================================================
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* Allow method references to specify generics.
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* Bug #207
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*
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* Juan Martin Sotuyo Dodero 01/2017
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*====================================================================
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* Simplify VariableDeclaratorId, forbidding illegal sequences such as
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* this[] and MyClass.this[]
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*
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* Juan Martin Sotuyo Dodero 10/2016
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*====================================================================
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* Improve lambda detection in PrimaryPrefix to improve parsing performance.
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*
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* Juan Martin Sotuyo Dodero 10/2016
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*====================================================================
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* Fix for regression introduced in previous changeset.
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* The syntactic lookahead was not properly handled by javacc,
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* so it was converted to a semantic one
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* Bug #1530
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*
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* Juan Martin Sotuyo Dodero 10/2016
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*====================================================================
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* Fix for an expression within an additive expression that was
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* wrongly taken as a cast expression.
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* Bug #1484
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*
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* Andreas Dangel 05/2016
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*====================================================================
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* Fix for Lambda expression with one variable
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* Bug #1470
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*
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* Andreas Dangel 04/2016
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*====================================================================
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* Added support for explicit receiver parameters.
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* Bug #1455
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*
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* Andreas Dangel 01/2016
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*====================================================================
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* Added capability for Tracking Tokens.
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*
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* Amit Kumar Prasad 10/2015
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*====================================================================
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* Fix for Cast Expression not detected properly in Return statements
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* Bug #1429
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*
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* Andreas Dangel 10/2015
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*====================================================================
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* Fix for Lambda expressions without variables.
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*
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* Andreas Dangel 11/2014
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*====================================================================
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* Fix for Lambda expressions with two or three variables.
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*
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* Andreas Dangel 07/2014
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*====================================================================
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* Added support for Java 8 language constructs.
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*
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* Andreas Dangel 01/2014
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* ===================================================================
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* Fix ForStatement to allow Annotations within the initializer.
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*
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* Andreas Dangel 01/2013
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* ===================================================================
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* Fix wrong consumption of modifiers (e.g. "final") in a for-each loop.
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* Check for wrong java usage when catching multiple exceptions.
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*
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* Andreas Dangel 12/2012
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* ===================================================================
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* Enhance grammar to use LocalVariableDeclaration in a for-each loop.
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* This enhances the symbol table to recognize variables declared in such
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* a for-each loop.
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*
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* Andreas Dangel 10/2012
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* ===================================================================
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* Fix parser problem #3530124 with generics
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*
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* Modified the grammar, so that the different usages of generics work.
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* Adjusted the rules, that use "super", as super is no longer a PrimarySuffix.
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* It's now either a ExplicitConstructorInvocation or a PrimaryPrefix.
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* See also test case ParserCornersTest/testParsersCases
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*
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* Andreas Dangel 05/2012
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* ===================================================================
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* Added support for Java 7 language constructs
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*
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* Dinesh Bolkensteyn (SonarSource), 10/2011
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* ===================================================================
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* Changed the CastLookahead production to use 3 lookaheads for primitive types as suggested by Andreas Dangel
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*
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* Brian Remedios 07/2011
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* ===================================================================
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* Added in support for assert as a name using lookaheads
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*
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* Tom Copeland, 09/03
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* ===================================================================
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* Copied over the changes made by Andrea Gini and Marco Savard to
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* support JDK 1.4 language constructs, i.e., asserts.
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* See the java1_4c.jj distributed in the javacc2.1/examples/JavaGrammers directory.
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* Made numerous other modifications to support PMD.
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*
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* Tom Copeland, 6/02
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* ===================================================================
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* This file is a modified version of one originally found in the
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* VTransformer Examples directory of JavaCC1_1. It has been
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* modified to accept Java source code for Java 1.2. Basically,
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* this means a new key word was added, 'strictfp', and that keyword
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* added to the appropriate productions and LOOKAHEADs (where other,
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* similar keywords are listed as possible choices). This involved
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* changing 11 lines.
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*
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* Some other minor changes were made, which can be found by doing
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* a search on 'DW, 7/99'.
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*
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* The goal of this effort was for the grammar to be able to parse
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* any legal Java 1.2 source code. It does not reject all illegal
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* cases, but neither did the original. Plus, when it comes to
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* the new 'strictfp' keyword, the Java Compiler from Sun (JDK1.2.1)
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* also does not reject all illegal cases, as defined by the
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* "Updates" document found at
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* http://java.sun.com/docs/books/jls/strictfp-changes.pdf
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* (see the testcases.txt file for details).
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*
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* David Williams, 7/99
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* ===================================================================
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*
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*
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* Copyright (C) 1996, 1997 Sun Microsystems Inc.
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*
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* Use of this file and the system it is part of is constrained by the
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* file COPYRIGHT in the root directory of this system. You may, however,
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* make any modifications you wish to this file.
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*
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* Java files generated by running JavaCC on this file (or modified versions
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* of this file) may be used in exactly the same manner as Java files
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* generated from any grammar developed by you.
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*
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* Author: Sriram Sankar
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* Date: 3/5/97
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*
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* This file contains a Java grammar and actions that implement a front-end.
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*/
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options {
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JAVA_UNICODE_ESCAPE = true;
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CACHE_TOKENS = true;
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STATIC = false;
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USER_CHAR_STREAM = true;
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JDK_VERSION = "1.5";
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MULTI = true;
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VISITOR = true;
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NODE_USES_PARSER = true;
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TRACK_TOKENS = true;
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NODE_PACKAGE="net.sourceforge.pmd.lang.java.ast";
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// disable the calculation of expected tokens when a parse error occurs
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// depending on the possible allowed next tokens, this
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// could be expensive (see https://github.com/pmd/pmd/issues/3117)
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//ERROR_REPORTING = false;
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//DEBUG_PARSER = true;
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//DEBUG_LOOKAHEAD = true;
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//DEBUG_TOKEN_MANAGER = true;
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}
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PARSER_BEGIN(JavaParser)
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package net.sourceforge.pmd.lang.java.ast;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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import net.sourceforge.pmd.lang.ast.CharStream;
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import net.sourceforge.pmd.lang.ast.Node;
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import net.sourceforge.pmd.lang.ast.TokenMgrError;
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public class JavaParser {
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private int jdkVersion = 0;
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private boolean preview = false;
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public void setJdkVersion(int jdkVersion) {
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this.jdkVersion = jdkVersion;
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}
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public void setPreview(boolean preview) {
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this.preview = preview;
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}
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private void throwParseException(String message) {
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int line = -1;
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int col = -1;
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if (jj_lastpos != null) {
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line = jj_lastpos.beginLine;
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col = jj_lastpos.beginColumn;
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}
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throw new ParseException("Line " + line + ", Column " + col + ": " + message);
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}
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private void checkForBadAssertUsage(String in, String usage) {
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if (jdkVersion > 3 && in.equals("assert")) {
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throwParseException("Can't use 'assert' as " + usage + " when running in JDK 1.4 mode!");
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}
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}
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private void checkForBadStaticImportUsage() {
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if (jdkVersion < 5) {
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throwParseException("Can't use static imports when running in JDK 1.4 mode!");
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}
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}
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private void checkForBadAnnotationUsage() {
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if (jdkVersion < 5) {
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throwParseException("Can't use annotations when running in JDK 1.4 mode!");
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}
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}
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private void checkForBadGenericsUsage() {
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if (jdkVersion < 5) {
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throwParseException("Can't use generics unless running in JDK 1.5 mode!");
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}
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}
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private void checkForBadVariableArgumentsUsage() {
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if (jdkVersion < 5) {
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throwParseException("Can't use variable arguments (varargs) when running in JDK 1.4 mode!");
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}
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}
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private void checkForBadJDK15ForLoopSyntaxArgumentsUsage() {
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if (jdkVersion < 5) {
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throwParseException("Can't use JDK 1.5 for loop syntax when running in JDK 1.4 mode!");
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}
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}
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private void checkForBadEnumUsage(String in, String usage) {
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if (jdkVersion >= 5 && in.equals("enum")) {
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throwParseException("Can't use 'enum' as " + usage + " when running in JDK 1.5 mode!");
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}
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}
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private void checkForBadHexFloatingPointLiteral() {
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if (jdkVersion < 5) {
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throwParseException("Can't use hexadecimal floating point literals in pre-JDK 1.5 target");
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}
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}
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private void checkForBadNumericalLiteralslUsage(Token token) {
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if (jdkVersion < 7) {
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if (token.image.contains("_")) {
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throwParseException("Can't use underscores in numerical literals when running in JDK inferior to 1.7 mode!");
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}
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if (token.image.startsWith("0b") || token.image.startsWith("0B")) {
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throwParseException("Can't use binary numerical literals when running in JDK inferior to 1.7 mode!");
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}
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}
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}
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private void checkForBadDiamondUsage() {
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if (jdkVersion < 7) {
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throwParseException("Cannot use the diamond generic notation when running in JDK inferior to 1.7 mode!");
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}
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}
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private void checkForBadTryWithResourcesUsage() {
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if (jdkVersion < 7) {
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throwParseException("Cannot use the try-with-resources notation when running in JDK inferior to 1.7 mode!");
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}
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}
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private void checkForBadMultipleExceptionsCatching() {
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if (jdkVersion < 7) {
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throwParseException("Cannot catch multiple exceptions when running in JDK inferior to 1.7 mode!");
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}
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}
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private void checkForBadLambdaUsage() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use lambda expressions when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkForBadMethodReferenceUsage() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use method references when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkForBadDefaultImplementationUsage() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use default implementations in interfaces when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkForBadIntersectionTypesInCasts() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use intersection types in casts when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkForBadTypeAnnotations() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use type annotations when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkforBadExplicitReceiverParameter() {
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if (jdkVersion < 8) {
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throwParseException("Cannot use explicit receiver parameters when running in JDK inferior to 1.8 mode!");
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}
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}
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private void checkForBadAnonymousDiamondUsage() {
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if (jdkVersion < 9) {
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ASTAllocationExpression node = (ASTAllocationExpression)jjtree.peekNode();
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ASTTypeArguments types = node.getFirstChildOfType(ASTClassOrInterfaceType.class).getFirstChildOfType(ASTTypeArguments.class);
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if (node.isAnonymousClass() && types != null && types.isDiamond()) {
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throwParseException("Cannot use '<>' with anonymous inner classes when running in JDK inferior to 9 mode!");
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}
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}
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}
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/**
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* Keeps track whether we are dealing with an interface or not. Needed since the tree is
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* is not fully constructed yet, when we check for private interface methods.
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* The flag is updated, if entering ClassOrInterfaceDeclaration and reset when leaving.
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* The flag is also reset, if entering a anonymous inner class or enums.
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*/
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private boolean inInterface = false;
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private void checkForBadPrivateInterfaceMethod(ASTMethodDeclaration node) {
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if (jdkVersion < 9 && inInterface && node.isPrivate()) {
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throwParseException("Cannot use private interface methods when running in JDK inferior to 9 mode!");
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}
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}
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private void checkForBadIdentifier(String image) {
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if (jdkVersion >= 9 && "_".equals(image)) {
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throwParseException("With JDK 9, '_' is a keyword, and may not be used as an identifier!");
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}
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}
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private void checkForBadModuleUsage() {
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if (jdkVersion < 9) {
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throwParseException("Cannot use module declaration when running in JDK inferior to 9 mode!");
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}
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}
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private void checkForBadConciseTryWithResourcesUsage() {
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if (jdkVersion < 9) {
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throwParseException("Cannot use concise try-with-resources when running in JDK inferior to 9 mode!");
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}
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}
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private void checkForBadTypeIdentifierUsage(String image) {
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if (jdkVersion >= 10 && "var".equals(image)) {
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throwParseException("With JDK 10, 'var' is a contextual keyword and cannot be used for type declarations!");
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}
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if (jdkVersion >= 14 && "yield".equals(image)) {
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throwParseException("With JDK 14, 'yield' is a contextual keyword and cannot be used for type declarations!");
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}
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if (jdkVersion >= 16 && "record".equals(image)) {
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throwParseException("With JDK >= 16, 'record' is a contextual keyword and cannot be used for type declarations!");
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}
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if (jdkVersion >= 17 && "sealed".equals(image)) {
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throwParseException("With JDK >= 17, 'sealed' is a contextual keyword and cannot be used for type declarations!");
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}
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if (jdkVersion >= 17 && "permits".equals(image)) {
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throwParseException("With JDK >= 17, 'permits' is a contextual keyword and cannot be used for type declarations!");
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}
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}
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private void checkForMultipleCaseLabels() {
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if (jdkVersion < 14) {
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throwParseException("Multiple case labels in switch statements are only supported with Java >= 14");
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}
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}
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/**
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* Keeps track during tree construction, whether we are currently building a switch label.
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* A switch label must not contain a LambdaExpression.
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|
* Unfortunately, we have added LambdaExpression as part of PrimaryPrefix, which is wrong.
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* To keep compatibility, this flag is used, whether a LambdaExpression should be parsed
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* in PrimaryPrefix.
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* See also comment at #Expression().
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*/
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private boolean inSwitchLabel = false;
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private void checkForSwitchRules() {
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if (jdkVersion < 14) {
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throwParseException("Switch rules in switch statements are only supported with Java >= 14");
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}
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}
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private void checkForSwitchExpression() {
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if (jdkVersion < 14) {
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throwParseException("Switch expressions are only supported with Java >= 14");
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}
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}
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|
|
private void checkForYieldStatement() {
|
|
if (jdkVersion < 14) {
|
|
throwParseException("Yield statements are only supported with Java >= 14");
|
|
}
|
|
}
|
|
|
|
private void checkForTextBlockLiteral() {
|
|
if (!(jdkVersion >= 15)) {
|
|
throwParseException("Text block literals are only supported with Java >= 15");
|
|
}
|
|
}
|
|
|
|
private void checkForNewStringSpaceEscape(String s) {
|
|
if (jdkVersion < 15 && s.contains("\\s") && !s.contains("\\\\s")) {
|
|
throwParseException("The escape sequence \"\\s\" is only supported with Java >= 15");
|
|
}
|
|
}
|
|
|
|
private void checkforBadInstanceOfPattern() {
|
|
if (jdkVersion < 16) {
|
|
throwParseException("Pattern Matching for instanceof is only supported with JDK >= 16");
|
|
}
|
|
}
|
|
|
|
private boolean isRecordTypeSupported() {
|
|
return jdkVersion >= 16;
|
|
}
|
|
|
|
private void checkForRecordType() {
|
|
if (!isRecordTypeSupported()) {
|
|
throwParseException("Records are only supported with JDK >= 16");
|
|
}
|
|
}
|
|
|
|
private void checkForLocalInterfaceOrEnumType() {
|
|
if (!isRecordTypeSupported()) {
|
|
throwParseException("Local interfaces and enums are only supported with JDK >= 16");
|
|
}
|
|
}
|
|
|
|
private boolean isSealedClassSupported() {
|
|
return jdkVersion >= 17;
|
|
}
|
|
|
|
private void checkForSealedClassUsage() {
|
|
if (!isSealedClassSupported()) {
|
|
throwParseException("Sealed Classes are only supported with JDK >= 17.");
|
|
}
|
|
}
|
|
|
|
private boolean isJEP406Supported() {
|
|
return (jdkVersion == 19 || jdkVersion == 20) && preview;
|
|
}
|
|
|
|
private void checkForPatternMatchingInSwitch() {
|
|
if (!isJEP406Supported()) {
|
|
throwParseException("Pattern Matching in Switch is only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForNullCaseLabel() {
|
|
if (!isJEP406Supported()) {
|
|
throwParseException("Null case labels in switch are only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForDefaultCaseLabel() {
|
|
if (!((jdkVersion == 19) && preview)) {
|
|
throwParseException("Default case labels in switch are only supported with JDK 19 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForNullWithDefaultCaseLabel() {
|
|
if (!isJEP406Supported()) {
|
|
throwParseException("Null case labels with default in switch are only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForParenthesizedPattern() {
|
|
if (!((jdkVersion == 19 || jdkVersion == 20) && preview)) {
|
|
throwParseException("Parenthesized patterns are only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForGuard() {
|
|
if (!((jdkVersion == 19 || jdkVersion == 20) && preview)) {
|
|
throwParseException("Guards are only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
private void checkForRecordPatterns() {
|
|
if (!((jdkVersion == 19 || jdkVersion == 20) && preview)) {
|
|
throwParseException("Record Patterns are only supported with JDK 19 Preview or JDK 20 Preview.");
|
|
}
|
|
}
|
|
|
|
// This is a semantic LOOKAHEAD to determine if we're dealing with an assert
|
|
// Note that this can't be replaced with a syntactic lookahead
|
|
// since "assert" isn't a string literal token
|
|
private boolean isNextTokenAnAssert() {
|
|
if (jdkVersion <= 3) {
|
|
return false;
|
|
}
|
|
|
|
return getToken(1).image.equals("assert");
|
|
}
|
|
|
|
private boolean isPrecededByComment(Token tok) {
|
|
boolean res = false;
|
|
while (!res && tok.specialToken != null) {
|
|
tok = tok.specialToken;
|
|
res = tok.kind == SINGLE_LINE_COMMENT ||
|
|
tok.kind == FORMAL_COMMENT ||
|
|
tok.kind == MULTI_LINE_COMMENT;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Semantic lookahead to check if the next identifier is a
|
|
* specific restricted keyword.
|
|
*
|
|
* <p>Restricted keywords are:
|
|
* var, yield, record, sealed, permits, "non" + "-" + "sealed"
|
|
*
|
|
* <p>enum and assert is used like restricted keywords, as they were not keywords
|
|
* in the early java versions.
|
|
*/
|
|
private boolean isKeyword(String image) {
|
|
return isKeyword(1, image);
|
|
}
|
|
|
|
private boolean isKeyword(int index, String image) {
|
|
Token token = getToken(index);
|
|
return token.kind == IDENTIFIER && token.image.equals(image);
|
|
}
|
|
|
|
private boolean isToken(int index, int kind) {
|
|
return getToken(index).kind == kind;
|
|
}
|
|
|
|
/**
|
|
* Semantic lookahead which matches "non-sealed".
|
|
*
|
|
* <p>"non-sealed" cannot be a token, for several reasons:
|
|
* It is only a keyword with java15 preview+, it consists actually
|
|
* of several separate tokens, which are valid on their own.
|
|
*/
|
|
private boolean isNonSealedModifier() {
|
|
if (isKeyword(1, "non") && isToken(2, MINUS) && isKeyword(3, "sealed")) {
|
|
Token nonToken = getToken(1);
|
|
Token minusToken = getToken(2);
|
|
Token sealedToken = getToken(3);
|
|
return nonToken.endColumn + 1 == minusToken.beginColumn
|
|
&& minusToken.endColumn + 1 == sealedToken.beginColumn;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
private boolean classModifierForLocalTypesLookahead() {
|
|
Token next = getToken(1);
|
|
return next.kind == AT
|
|
|| next.kind == PUBLIC
|
|
|| next.kind == PROTECTED
|
|
|| next.kind == PRIVATE
|
|
|| next.kind == ABSTRACT
|
|
|| next.kind == STATIC
|
|
|| next.kind == FINAL
|
|
|| next.kind == STRICTFP;
|
|
}
|
|
|
|
private boolean localTypeDeclLookahead() {
|
|
Token next = getToken(1);
|
|
return next.kind == CLASS
|
|
|| isRecordTypeSupported() && next.kind == INTERFACE
|
|
|| isRecordTypeSupported() && next.kind == IDENTIFIER && next.image.equals("enum")
|
|
|| isRecordTypeSupported() && next.kind == IDENTIFIER && next.image.equals("record") && isToken(2, IDENTIFIER);
|
|
}
|
|
|
|
/**
|
|
* True if we're in a switch block, one precondition for parsing a yield
|
|
* statement.
|
|
*/
|
|
private boolean inSwitchExprBlock = false;
|
|
|
|
private boolean isYieldStart() {
|
|
return inSwitchExprBlock && jdkVersion >= 14
|
|
&& isKeyword("yield")
|
|
&& mayStartExprAfterYield(2);
|
|
}
|
|
|
|
private boolean mayStartExprAfterYield(final int offset) {
|
|
// based off of https://hg.openjdk.java.net/jdk/jdk/file/bc3da0226ffa/src/jdk.compiler/share/classes/com/sun/tools/javac/parser/JavacParser.java#l2580
|
|
// please don't sue me
|
|
Token token = getToken(offset);
|
|
if (token == null) return false; // eof
|
|
switch (token.kind) {
|
|
case PLUS: case MINUS: case STRING_LITERAL: case CHARACTER_LITERAL:
|
|
case INTEGER_LITERAL: case FLOATING_POINT_LITERAL: case HEX_FLOATING_POINT_LITERAL:
|
|
case NULL: case IDENTIFIER: case TRUE: case FALSE:
|
|
case NEW: case SWITCH: case THIS: case SUPER:
|
|
return true;
|
|
case INCR: case DECR:
|
|
return getToken(offset + 1).kind != SEMICOLON; // eg yield++;
|
|
case LPAREN:
|
|
int lookahead = offset + 1;
|
|
int balance = 1;
|
|
Token t;
|
|
while ((t = getToken(lookahead)) != null && balance > 0) {
|
|
switch (t.kind) {
|
|
case LPAREN: balance++; break;
|
|
case RPAREN: balance--; break;
|
|
case COMMA: if (balance == 1) return false; // a method call, eg yield(1, 2);
|
|
}
|
|
lookahead++;
|
|
}
|
|
// lambda: yield () -> {};
|
|
// method call: yield ();
|
|
return t != null
|
|
&& (lookahead != offset + 2 // ie ()
|
|
|| t.kind == LAMBDA);
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
private boolean shouldStartStatementInSwitch() {
|
|
switch (getToken(1).kind) {
|
|
case _DEFAULT:
|
|
case CASE:
|
|
case RBRACE:
|
|
return false;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
public Map<Integer, String> getSuppressMap() {
|
|
return token_source.getSuppressMap();
|
|
}
|
|
|
|
public void setSuppressMarker(String marker) {
|
|
token_source.setSuppressMarker(marker);
|
|
}
|
|
|
|
/**
|
|
* Keeps track during tree construction, whether we are currently building an
|
|
* explicit constructor invocation. Then the PrimaryExpression that may prefix
|
|
* a qualified super constructor call may not consume "super" tokens.
|
|
*/
|
|
private boolean inExplicitConstructorInvoc = false;
|
|
|
|
}
|
|
PARSER_END(JavaParser)
|
|
|
|
TOKEN_MGR_DECLS :
|
|
{
|
|
protected List<Comment> comments = new ArrayList<Comment>();
|
|
}
|
|
|
|
/* WHITE SPACE */
|
|
|
|
SPECIAL_TOKEN :
|
|
{
|
|
< HORIZONTAL_WHITESPACE: [" ", "\t", "\f"] >
|
|
| < LINE_TERMINATOR: "\n" | "\r" | "\r\n" >
|
|
}
|
|
|
|
SPECIAL_TOKEN :
|
|
{
|
|
< SINGLE_LINE_COMMENT: "//"(~["\n","\r"])* ("\n"|"\r"|"\r\n")? >
|
|
{
|
|
int startOfNOPMD = matchedToken.image.indexOf(suppressMarker);
|
|
if (startOfNOPMD != -1) {
|
|
suppressMap.put(matchedToken.beginLine, matchedToken.image.substring(startOfNOPMD + suppressMarker.length()));
|
|
}
|
|
comments.add(new SingleLineComment(matchedToken));
|
|
}
|
|
}
|
|
|
|
/* COMMENTS */
|
|
|
|
MORE :
|
|
{
|
|
<"/**" ~["/"]> { input_stream.backup(1); } : IN_FORMAL_COMMENT
|
|
|
|
|
"/*" : IN_MULTI_LINE_COMMENT
|
|
}
|
|
|
|
<IN_FORMAL_COMMENT>
|
|
SPECIAL_TOKEN :
|
|
{
|
|
<FORMAL_COMMENT: "*/" > { comments.add(new FormalComment(matchedToken)); } : DEFAULT
|
|
}
|
|
|
|
<IN_MULTI_LINE_COMMENT>
|
|
SPECIAL_TOKEN :
|
|
{
|
|
<MULTI_LINE_COMMENT: "*/" > { comments.add(new MultiLineComment(matchedToken)); } : DEFAULT
|
|
}
|
|
|
|
<IN_FORMAL_COMMENT,IN_MULTI_LINE_COMMENT>
|
|
MORE :
|
|
{
|
|
< ~[] >
|
|
}
|
|
|
|
/* RESERVED WORDS AND LITERALS */
|
|
|
|
TOKEN :
|
|
{
|
|
< ABSTRACT: "abstract" >
|
|
| < BOOLEAN: "boolean" >
|
|
| < BREAK: "break" >
|
|
| < BYTE: "byte" >
|
|
| < CASE: "case" >
|
|
| < CATCH: "catch" >
|
|
| < CHAR: "char" >
|
|
| < CLASS: "class" >
|
|
| < CONST: "const" >
|
|
| < CONTINUE: "continue" >
|
|
| < _DEFAULT: "default" >
|
|
| < DO: "do" >
|
|
| < DOUBLE: "double" >
|
|
| < ELSE: "else" >
|
|
| < EXTENDS: "extends" >
|
|
| < FALSE: "false" >
|
|
| < FINAL: "final" >
|
|
| < FINALLY: "finally" >
|
|
| < FLOAT: "float" >
|
|
| < FOR: "for" >
|
|
| < GOTO: "goto" >
|
|
| < IF: "if" >
|
|
| < IMPLEMENTS: "implements" >
|
|
| < IMPORT: "import" >
|
|
| < INSTANCEOF: "instanceof" >
|
|
| < INT: "int" >
|
|
| < INTERFACE: "interface" >
|
|
| < LONG: "long" >
|
|
| < NATIVE: "native" >
|
|
| < NEW: "new" >
|
|
| < NULL: "null" >
|
|
| < PACKAGE: "package">
|
|
| < PRIVATE: "private" >
|
|
| < PROTECTED: "protected" >
|
|
| < PUBLIC: "public" >
|
|
| < RETURN: "return" >
|
|
| < SHORT: "short" >
|
|
| < STATIC: "static" >
|
|
| < SUPER: "super" >
|
|
| < SWITCH: "switch" >
|
|
| < SYNCHRONIZED: "synchronized" >
|
|
| < THIS: "this" >
|
|
| < THROW: "throw" >
|
|
| < THROWS: "throws" >
|
|
| < TRANSIENT: "transient" >
|
|
| < TRUE: "true" >
|
|
| < TRY: "try" >
|
|
| < VOID: "void" >
|
|
| < VOLATILE: "volatile" >
|
|
| < WHILE: "while" >
|
|
| < STRICTFP: "strictfp" >
|
|
}
|
|
|
|
|
|
/* Restricted Keywords */
|
|
// Note: These are commented out, since these keywords
|
|
// can still be used as identifiers.
|
|
// see isKeyword() semantic lookup
|
|
/*
|
|
TOKEN :
|
|
{
|
|
< OPEN: "open" >
|
|
| < MODULE: "module" >
|
|
| < REQUIRES: "requires" >
|
|
| < TRANSITIVE: "transitive" >
|
|
| < EXPORTS: "exports" >
|
|
| < OPENS: "opens" >
|
|
| < TO: "to" >
|
|
| < USES: "uses" >
|
|
| < PROVIDES: "provides" >
|
|
| < WITH: "with" >
|
|
}
|
|
*/
|
|
|
|
/* LITERALS */
|
|
|
|
TOKEN :
|
|
{
|
|
< INTEGER_LITERAL:
|
|
<DECIMAL_LITERAL> (["l","L"])?
|
|
| <HEX_LITERAL> (["l","L"])?
|
|
| <BINARY_LITERAL> (["l","L"])?
|
|
| <OCTAL_LITERAL> (["l","L"])?
|
|
>
|
|
|
|
|
< #DECIMAL_LITERAL: (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) >
|
|
|
|
|
< #HEX_LITERAL: "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"]((["0"-"9","a"-"f","A"-"F","_"])*["0"-"9","a"-"f","A"-"F"])?) >
|
|
|
|
|
< #BINARY_LITERAL: "0" ["b","B"] (["0","1"]((["0","1","_"])*["0","1"])?) >
|
|
|
|
|
< #OCTAL_LITERAL: "0" (["0"-"7"]((["0"-"7","_"])*["0"-"7"])?) >
|
|
|
|
|
< FLOATING_POINT_LITERAL:
|
|
(["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) "." (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?)? (<EXPONENT>)? (["f","F","d","D"])?
|
|
| "." (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) (<EXPONENT>)? (["f","F","d","D"])?
|
|
| (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) <EXPONENT> (["f","F","d","D"])?
|
|
| (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) (<EXPONENT>)? ["f","F","d","D"]
|
|
>
|
|
|
|
|
< HEX_FLOATING_POINT_LITERAL:
|
|
(<HEX_LITERAL> (".")? | "0" ["x","X"] (["0"-"9","a"-"f","A"-"F"]((["0"-"9","a"-"f","A"-"F","_"])*["0"-"9","a"-"f","A"-"F"])?)? "." (["0"-"9","a"-"f","A"-"F"]((["0"-"9","a"-"f","A"-"F","_"])*["0"-"9","a"-"f","A"-"F"])?)) ["p","P"] (["+","-"])? (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) (["f","F","d","D"])?
|
|
>
|
|
|
|
|
< #EXPONENT: ["e","E"] (["+","-"])? (["0"-"9"]((["0"-"9","_"])*["0"-"9"])?) >
|
|
|
|
|
< CHARACTER_LITERAL:
|
|
"'"
|
|
( (~["'","\\","\n","\r"])
|
|
| ("\\"
|
|
( ["n","t","b","r","f","\\","'","\""]
|
|
| ["0"-"7"] ( ["0"-"7"] )?
|
|
| ["0"-"3"] ["0"-"7"] ["0"-"7"]
|
|
)
|
|
)
|
|
)
|
|
"'"
|
|
>
|
|
| < #STRING_ESCAPE:
|
|
"\\"
|
|
( ["n","t","b","r","f", "s", "\\","'","\""]
|
|
// octal escapes
|
|
| ["0"-"7"] ( ["0"-"7"] )?
|
|
| ["0"-"3"] ["0"-"7"] ["0"-"7"]
|
|
)
|
|
>
|
|
|
|
|
< STRING_LITERAL:
|
|
"\""
|
|
( (~["\"","\\","\n","\r"])
|
|
| <STRING_ESCAPE>
|
|
)*
|
|
"\""
|
|
>
|
|
}
|
|
|
|
/* TEXT BLOCKS */
|
|
MORE :
|
|
{
|
|
< "\"\"\"" (<HORIZONTAL_WHITESPACE>)* <LINE_TERMINATOR> > : IN_TEXT_BLOCK_LITERAL
|
|
}
|
|
|
|
<IN_TEXT_BLOCK_LITERAL>
|
|
TOKEN :
|
|
{
|
|
<TEXT_BLOCK_LITERAL: "\"\"\"" > : DEFAULT
|
|
}
|
|
|
|
<IN_TEXT_BLOCK_LITERAL>
|
|
MORE :
|
|
{
|
|
< ~["\\"] | <STRING_ESCAPE> | ("\\")? <LINE_TERMINATOR> >
|
|
}
|
|
|
|
/* IDENTIFIERS */
|
|
|
|
TOKEN :
|
|
{
|
|
< IDENTIFIER : <LETTER> ( <PART_LETTER> )* >
|
|
// all chars for which Character.isJavaIdentifierStart is true
|
|
| < #LETTER : ["$","A"-"Z","_","a"-"z","\u00a2"-"\u00a5","\u00aa","\u00b5","\u00ba",
|
|
"\u00c0"-"\u00d6","\u00d8"-"\u00f6","\u00f8"-"\u021f","\u0222"-"\u0233","\u0250"-"\u02ad",
|
|
"\u02b0"-"\u02b8","\u02bb"-"\u02c1","\u02d0"-"\u02d1","\u02e0"-"\u02e4","\u02ee","\u037a",
|
|
"\u0386","\u0388"-"\u038a","\u038c","\u038e"-"\u03a1","\u03a3"-"\u03ce","\u03d0"-"\u03d7",
|
|
"\u03da"-"\u03f3","\u0400"-"\u0481","\u048c"-"\u04c4","\u04c7"-"\u04c8","\u04cb"-"\u04cc",
|
|
"\u04d0"-"\u04f5","\u04f8"-"\u04f9","\u0531"-"\u0556","\u0559","\u0561"-"\u0587",
|
|
"\u05d0"-"\u05ea","\u05f0"-"\u05f2","\u0621"-"\u063a","\u0640"-"\u064a","\u0671"-"\u06d3",
|
|
"\u06d5","\u06e5"-"\u06e6","\u06fa"-"\u06fc","\u0710","\u0712"-"\u072c","\u0780"-"\u07a5",
|
|
"\u0905"-"\u0939","\u093d","\u0950","\u0958"-"\u0961","\u0985"-"\u098c","\u098f"-"\u0990",
|
|
"\u0993"-"\u09a8","\u09aa"-"\u09b0","\u09b2","\u09b6"-"\u09b9","\u09dc"-"\u09dd",
|
|
"\u09df"-"\u09e1","\u09f0"-"\u09f3","\u0a05"-"\u0a0a","\u0a0f"-"\u0a10","\u0a13"-"\u0a28",
|
|
"\u0a2a"-"\u0a30","\u0a32"-"\u0a33","\u0a35"-"\u0a36","\u0a38"-"\u0a39","\u0a59"-"\u0a5c",
|
|
"\u0a5e","\u0a72"-"\u0a74","\u0a85"-"\u0a8b","\u0a8d","\u0a8f"-"\u0a91","\u0a93"-"\u0aa8",
|
|
"\u0aaa"-"\u0ab0","\u0ab2"-"\u0ab3","\u0ab5"-"\u0ab9","\u0abd","\u0ad0","\u0ae0",
|
|
"\u0b05"-"\u0b0c","\u0b0f"-"\u0b10","\u0b13"-"\u0b28","\u0b2a"-"\u0b30","\u0b32"-"\u0b33",
|
|
"\u0b36"-"\u0b39","\u0b3d","\u0b5c"-"\u0b5d","\u0b5f"-"\u0b61","\u0b85"-"\u0b8a",
|
|
"\u0b8e"-"\u0b90","\u0b92"-"\u0b95","\u0b99"-"\u0b9a","\u0b9c","\u0b9e"-"\u0b9f",
|
|
"\u0ba3"-"\u0ba4","\u0ba8"-"\u0baa","\u0bae"-"\u0bb5","\u0bb7"-"\u0bb9","\u0c05"-"\u0c0c",
|
|
"\u0c0e"-"\u0c10","\u0c12"-"\u0c28","\u0c2a"-"\u0c33","\u0c35"-"\u0c39","\u0c60"-"\u0c61",
|
|
"\u0c85"-"\u0c8c","\u0c8e"-"\u0c90","\u0c92"-"\u0ca8","\u0caa"-"\u0cb3","\u0cb5"-"\u0cb9",
|
|
"\u0cde","\u0ce0"-"\u0ce1","\u0d05"-"\u0d0c","\u0d0e"-"\u0d10","\u0d12"-"\u0d28",
|
|
"\u0d2a"-"\u0d39","\u0d60"-"\u0d61","\u0d85"-"\u0d96","\u0d9a"-"\u0db1","\u0db3"-"\u0dbb",
|
|
"\u0dbd","\u0dc0"-"\u0dc6","\u0e01"-"\u0e30","\u0e32"-"\u0e33","\u0e3f"-"\u0e46",
|
|
"\u0e81"-"\u0e82","\u0e84","\u0e87"-"\u0e88","\u0e8a","\u0e8d","\u0e94"-"\u0e97",
|
|
"\u0e99"-"\u0e9f","\u0ea1"-"\u0ea3","\u0ea5","\u0ea7","\u0eaa"-"\u0eab","\u0ead"-"\u0eb0",
|
|
"\u0eb2"-"\u0eb3","\u0ebd","\u0ec0"-"\u0ec4","\u0ec6","\u0edc"-"\u0edd","\u0f00",
|
|
"\u0f40"-"\u0f47","\u0f49"-"\u0f6a","\u0f88"-"\u0f8b","\u1000"-"\u1021","\u1023"-"\u1027",
|
|
"\u1029"-"\u102a","\u1050"-"\u1055","\u10a0"-"\u10c5","\u10d0"-"\u10f6","\u1100"-"\u1159",
|
|
"\u115f"-"\u11a2","\u11a8"-"\u11f9","\u1200"-"\u1206","\u1208"-"\u1246","\u1248",
|
|
"\u124a"-"\u124d","\u1250"-"\u1256","\u1258","\u125a"-"\u125d","\u1260"-"\u1286","\u1288",
|
|
"\u128a"-"\u128d","\u1290"-"\u12ae","\u12b0","\u12b2"-"\u12b5","\u12b8"-"\u12be","\u12c0",
|
|
"\u12c2"-"\u12c5","\u12c8"-"\u12ce","\u12d0"-"\u12d6","\u12d8"-"\u12ee","\u12f0"-"\u130e",
|
|
"\u1310","\u1312"-"\u1315","\u1318"-"\u131e","\u1320"-"\u1346","\u1348"-"\u135a",
|
|
"\u13a0"-"\u13f4","\u1401"-"\u166c","\u166f"-"\u1676","\u1681"-"\u169a","\u16a0"-"\u16ea",
|
|
"\u1780"-"\u17b3","\u17db","\u1820"-"\u1877","\u1880"-"\u18a8","\u1e00"-"\u1e9b",
|
|
"\u1ea0"-"\u1ef9","\u1d00"-"\u1eef","\u1f00"-"\u1f15","\u1f18"-"\u1f1d","\u1f20"-"\u1f45","\u1f48"-"\u1f4d",
|
|
"\u1f50"-"\u1f57","\u1f59","\u1f5b","\u1f5d","\u1f5f"-"\u1f7d","\u1f80"-"\u1fb4",
|
|
"\u1fb6"-"\u1fbc","\u1fbe","\u1fc2"-"\u1fc4","\u1fc6"-"\u1fcc","\u1fd0"-"\u1fd3",
|
|
"\u1fd6"-"\u1fdb","\u1fe0"-"\u1fec","\u1ff2"-"\u1ff4","\u1ff6"-"\u1ffc","\u203f"-"\u2040",
|
|
"\u207f","\u20a0"-"\u20af","\u2102","\u2107","\u210a"-"\u2113","\u2115","\u2119"-"\u211d",
|
|
"\u2124","\u2126","\u2128","\u212a"-"\u212d","\u212f"-"\u2131","\u2133"-"\u2139",
|
|
"\u2160"-"\u2183","\u3005"-"\u3007","\u3021"-"\u3029","\u3031"-"\u3035","\u3038"-"\u303a",
|
|
"\u3041"-"\u3094","\u309d"-"\u309e","\u30a1"-"\u30fe","\u3105"-"\u312c","\u3131"-"\u318e",
|
|
"\u31a0"-"\u31b7","\u3400"-"\u4db5","\u4e00"-"\u9fa5","\ua000"-"\ua48c","\ua490"-"\uabff","\uac00"-"\ud7a3",
|
|
"\uf900"-"\ufa2d","\ufb00"-"\ufb06","\ufb13"-"\ufb17","\ufb1d","\ufb1f"-"\ufb28",
|
|
"\ufb2a"-"\ufb36","\ufb38"-"\ufb3c","\ufb3e","\ufb40"-"\ufb41","\ufb43"-"\ufb44",
|
|
"\ufb46"-"\ufbb1","\ufbd3"-"\ufd3d","\ufd50"-"\ufd8f","\ufd92"-"\ufdc7","\ufdf0"-"\ufdfb",
|
|
"\ufe33"-"\ufe34","\ufe4d"-"\ufe4f","\ufe69","\ufe70"-"\ufe72","\ufe74","\ufe76"-"\ufefc",
|
|
"\uff04","\uff21"-"\uff3a","\uff3f","\uff41"-"\uff5a","\uff65"-"\uffbe","\uffc2"-"\uffc7",
|
|
"\uffca"-"\uffcf","\uffd2"-"\uffd7","\uffda"-"\uffdc","\uffe0"-"\uffe1","\uffe5"-"\uffe6"]>
|
|
|
|
|
|
// all chars for which Character.isJavaIdentifierPart is true
|
|
| < #PART_LETTER: ["\u0000"-"\b","\u000e"-"\u001b","$","0"-"9","A"-"Z","_","a"-"z",
|
|
"\u007f"-"\u009f","\u00a2"-"\u00a5","\u00aa","\u00b5","\u00ba","\u00c0"-"\u00d6",
|
|
"\u00d8"-"\u00f6","\u00f8"-"\u021f","\u0222"-"\u0233","\u0250"-"\u02ad","\u02b0"-"\u02b8",
|
|
"\u02bb"-"\u02c1","\u02d0"-"\u02d1","\u02e0"-"\u02e4","\u02ee","\u0300"-"\u034e",
|
|
"\u0360"-"\u0362","\u037a","\u0386","\u0388"-"\u038a","\u038c","\u038e"-"\u03a1",
|
|
"\u03a3"-"\u03ce","\u03d0"-"\u03d7","\u03da"-"\u03f3","\u0400"-"\u0481","\u0483"-"\u0486",
|
|
"\u048c"-"\u04c4","\u04c7"-"\u04c8","\u04cb"-"\u04cc","\u04d0"-"\u04f5","\u04f8"-"\u04f9",
|
|
"\u0531"-"\u0556","\u0559","\u0561"-"\u0587","\u0591"-"\u05a1","\u05a3"-"\u05b9",
|
|
"\u05bb"-"\u05bd","\u05bf","\u05c1"-"\u05c2","\u05c4","\u05d0"-"\u05ea","\u05f0"-"\u05f2",
|
|
"\u0621"-"\u063a","\u0640"-"\u0655","\u0660"-"\u0669","\u0670"-"\u06d3","\u06d5"-"\u06dc",
|
|
"\u06df"-"\u06e8","\u06ea"-"\u06ed","\u06f0"-"\u06fc","\u070f"-"\u072c","\u0730"-"\u074a",
|
|
"\u0780"-"\u07b0","\u0901"-"\u0903","\u0905"-"\u0939","\u093c"-"\u094d","\u0950"-"\u0954",
|
|
"\u0958"-"\u0963","\u0966"-"\u096f","\u0981"-"\u0983","\u0985"-"\u098c","\u098f"-"\u0990",
|
|
"\u0993"-"\u09a8","\u09aa"-"\u09b0","\u09b2","\u09b6"-"\u09b9","\u09bc","\u09be"-"\u09c4",
|
|
"\u09c7"-"\u09c8","\u09cb"-"\u09cd","\u09d7","\u09dc"-"\u09dd","\u09df"-"\u09e3",
|
|
"\u09e6"-"\u09f3","\u0a02","\u0a05"-"\u0a0a","\u0a0f"-"\u0a10","\u0a13"-"\u0a28",
|
|
"\u0a2a"-"\u0a30","\u0a32"-"\u0a33","\u0a35"-"\u0a36","\u0a38"-"\u0a39","\u0a3c",
|
|
"\u0a3e"-"\u0a42","\u0a47"-"\u0a48","\u0a4b"-"\u0a4d","\u0a59"-"\u0a5c","\u0a5e",
|
|
"\u0a66"-"\u0a74","\u0a81"-"\u0a83","\u0a85"-"\u0a8b","\u0a8d","\u0a8f"-"\u0a91",
|
|
"\u0a93"-"\u0aa8","\u0aaa"-"\u0ab0","\u0ab2"-"\u0ab3","\u0ab5"-"\u0ab9","\u0abc"-"\u0ac5",
|
|
"\u0ac7"-"\u0ac9","\u0acb"-"\u0acd","\u0ad0","\u0ae0","\u0ae6"-"\u0aef","\u0b01"-"\u0b03",
|
|
"\u0b05"-"\u0b0c","\u0b0f"-"\u0b10","\u0b13"-"\u0b28","\u0b2a"-"\u0b30","\u0b32"-"\u0b33",
|
|
"\u0b36"-"\u0b39","\u0b3c"-"\u0b43","\u0b47"-"\u0b48","\u0b4b"-"\u0b4d","\u0b56"-"\u0b57",
|
|
"\u0b5c"-"\u0b5d","\u0b5f"-"\u0b61","\u0b66"-"\u0b6f","\u0b82"-"\u0b83","\u0b85"-"\u0b8a",
|
|
"\u0b8e"-"\u0b90","\u0b92"-"\u0b95","\u0b99"-"\u0b9a","\u0b9c","\u0b9e"-"\u0b9f",
|
|
"\u0ba3"-"\u0ba4","\u0ba8"-"\u0baa","\u0bae"-"\u0bb5","\u0bb7"-"\u0bb9","\u0bbe"-"\u0bc2",
|
|
"\u0bc6"-"\u0bc8","\u0bca"-"\u0bcd","\u0bd7","\u0be7"-"\u0bef","\u0c01"-"\u0c03",
|
|
"\u0c05"-"\u0c0c","\u0c0e"-"\u0c10","\u0c12"-"\u0c28","\u0c2a"-"\u0c33","\u0c35"-"\u0c39",
|
|
"\u0c3e"-"\u0c44","\u0c46"-"\u0c48","\u0c4a"-"\u0c4d","\u0c55"-"\u0c56","\u0c60"-"\u0c61",
|
|
"\u0c66"-"\u0c6f","\u0c82"-"\u0c83","\u0c85"-"\u0c8c","\u0c8e"-"\u0c90","\u0c92"-"\u0ca8",
|
|
"\u0caa"-"\u0cb3","\u0cb5"-"\u0cb9","\u0cbe"-"\u0cc4","\u0cc6"-"\u0cc8","\u0cca"-"\u0ccd",
|
|
"\u0cd5"-"\u0cd6","\u0cde","\u0ce0"-"\u0ce1","\u0ce6"-"\u0cef","\u0d02"-"\u0d03",
|
|
"\u0d05"-"\u0d0c","\u0d0e"-"\u0d10","\u0d12"-"\u0d28","\u0d2a"-"\u0d39","\u0d3e"-"\u0d43",
|
|
"\u0d46"-"\u0d48","\u0d4a"-"\u0d4d","\u0d57","\u0d60"-"\u0d61","\u0d66"-"\u0d6f",
|
|
"\u0d82"-"\u0d83","\u0d85"-"\u0d96","\u0d9a"-"\u0db1","\u0db3"-"\u0dbb","\u0dbd",
|
|
"\u0dc0"-"\u0dc6","\u0dca","\u0dcf"-"\u0dd4","\u0dd6","\u0dd8"-"\u0ddf","\u0df2"-"\u0df3",
|
|
"\u0e01"-"\u0e3a","\u0e3f"-"\u0e4e","\u0e50"-"\u0e59","\u0e81"-"\u0e82","\u0e84",
|
|
"\u0e87"-"\u0e88","\u0e8a","\u0e8d","\u0e94"-"\u0e97","\u0e99"-"\u0e9f","\u0ea1"-"\u0ea3",
|
|
"\u0ea5","\u0ea7","\u0eaa"-"\u0eab","\u0ead"-"\u0eb9","\u0ebb"-"\u0ebd","\u0ec0"-"\u0ec4",
|
|
"\u0ec6","\u0ec8"-"\u0ecd","\u0ed0"-"\u0ed9","\u0edc"-"\u0edd","\u0f00","\u0f18"-"\u0f19",
|
|
"\u0f20"-"\u0f29","\u0f35","\u0f37","\u0f39","\u0f3e"-"\u0f47","\u0f49"-"\u0f6a",
|
|
"\u0f71"-"\u0f84","\u0f86"-"\u0f8b","\u0f90"-"\u0f97","\u0f99"-"\u0fbc","\u0fc6",
|
|
"\u1000"-"\u1021","\u1023"-"\u1027","\u1029"-"\u102a","\u102c"-"\u1032","\u1036"-"\u1039",
|
|
"\u1040"-"\u1049","\u1050"-"\u1059","\u10a0"-"\u10c5","\u10d0"-"\u10f6","\u1100"-"\u1159",
|
|
"\u115f"-"\u11a2","\u11a8"-"\u11f9","\u1200"-"\u1206","\u1208"-"\u1246","\u1248",
|
|
"\u124a"-"\u124d","\u1250"-"\u1256","\u1258","\u125a"-"\u125d","\u1260"-"\u1286",
|
|
"\u1288","\u128a"-"\u128d","\u1290"-"\u12ae","\u12b0","\u12b2"-"\u12b5","\u12b8"-"\u12be",
|
|
"\u12c0","\u12c2"-"\u12c5","\u12c8"-"\u12ce","\u12d0"-"\u12d6","\u12d8"-"\u12ee",
|
|
"\u12f0"-"\u130e","\u1310","\u1312"-"\u1315","\u1318"-"\u131e","\u1320"-"\u1346",
|
|
"\u1348"-"\u135a","\u1369"-"\u1371","\u13a0"-"\u13f4","\u1401"-"\u166c","\u166f"-"\u1676",
|
|
"\u1681"-"\u169a","\u16a0"-"\u16ea","\u1780"-"\u17d3","\u17db","\u17e0"-"\u17e9",
|
|
"\u180b"-"\u180e","\u1810"-"\u1819","\u1820"-"\u1877","\u1880"-"\u18a9","\u1d00"-"\u1d7f","\u1e00"-"\u1e9b",
|
|
"\u1ea0"-"\u1ef9","\u1f00"-"\u1f15","\u1f18"-"\u1f1d","\u1f20"-"\u1f45","\u1f48"-"\u1f4d",
|
|
"\u1f50"-"\u1f57","\u1f59","\u1f5b","\u1f5d","\u1f5f"-"\u1f7d","\u1f80"-"\u1fb4",
|
|
"\u1fb6"-"\u1fbc","\u1fbe","\u1fc2"-"\u1fc4","\u1fc6"-"\u1fcc","\u1fd0"-"\u1fd3",
|
|
"\u1fd6"-"\u1fdb","\u1fe0"-"\u1fec","\u1ff2"-"\u1ff4","\u1ff6"-"\u1ffc","\u200c"-"\u200f",
|
|
"\u202a"-"\u202e","\u203f"-"\u2040","\u206a"-"\u206f","\u207f","\u20a0"-"\u20af",
|
|
"\u20d0"-"\u20dc","\u20e1","\u2102","\u2107","\u210a"-"\u2113","\u2115","\u2119"-"\u211d",
|
|
"\u2124","\u2126","\u2128","\u212a"-"\u212d","\u212f"-"\u2131","\u2133"-"\u2139",
|
|
"\u2160"-"\u2183","\u3005"-"\u3007","\u3021"-"\u302f","\u3031"-"\u3035","\u3038"-"\u303a",
|
|
"\u3041"-"\u3094","\u3099"-"\u309a","\u309d"-"\u309e","\u30a1"-"\u30fe","\u3105"-"\u312c",
|
|
"\u3131"-"\u318e","\u31a0"-"\u31b7","\u3400"-"\u4db5","\u4e00"-"\u9fa5","\ua000"-"\ua48c",
|
|
"\ua490"-"\uabff",
|
|
"\uac00"-"\ud7a3","\uf900"-"\ufa2d","\ufb00"-"\ufb06","\ufb13"-"\ufb17","\ufb1d"-"\ufb28",
|
|
"\ufb2a"-"\ufb36","\ufb38"-"\ufb3c","\ufb3e","\ufb40"-"\ufb41","\ufb43"-"\ufb44",
|
|
"\ufb46"-"\ufbb1","\ufbd3"-"\ufd3d","\ufd50"-"\ufd8f","\ufd92"-"\ufdc7","\ufdf0"-"\ufdfb",
|
|
"\ufe20"-"\ufe23","\ufe33"-"\ufe34","\ufe4d"-"\ufe4f","\ufe69","\ufe70"-"\ufe72","\ufe74",
|
|
"\ufe76"-"\ufefc","\ufeff","\uff04","\uff10"-"\uff19","\uff21"-"\uff3a","\uff3f",
|
|
"\uff41"-"\uff5a","\uff65"-"\uffbe","\uffc2"-"\uffc7","\uffca"-"\uffcf","\uffd2"-"\uffd7",
|
|
"\uffda"-"\uffdc","\uffe0"-"\uffe1","\uffe5"-"\uffe6","\ufff9"-"\ufffb"]>
|
|
}
|
|
|
|
/* SEPARATORS */
|
|
|
|
TOKEN :
|
|
{
|
|
< LPAREN: "(" >
|
|
| < RPAREN: ")" >
|
|
| < LBRACE: "{" >
|
|
| < RBRACE: "}" >
|
|
| < LBRACKET: "[" >
|
|
| < RBRACKET: "]" >
|
|
| < SEMICOLON: ";" >
|
|
| < COMMA: "," >
|
|
| < DOT: "." >
|
|
| < AT: "@" >
|
|
}
|
|
|
|
/* OPERATORS */
|
|
|
|
TOKEN :
|
|
{
|
|
< ASSIGN: "=" >
|
|
| < LT: "<" >
|
|
| < BANG: "!" >
|
|
| < TILDE: "~" >
|
|
| < HOOK: "?" >
|
|
| < COLON: ":" >
|
|
| < EQ: "==" >
|
|
| < LE: "<=" >
|
|
| < GE: ">=" >
|
|
| < NE: "!=" >
|
|
| < SC_OR: "||" >
|
|
| < SC_AND: "&&" >
|
|
| < INCR: "++" >
|
|
| < DECR: "--" >
|
|
| < PLUS: "+" >
|
|
| < MINUS: "-" >
|
|
| < STAR: "*" >
|
|
| < SLASH: "/" >
|
|
| < BIT_AND: "&" >
|
|
| < BIT_OR: "|" >
|
|
| < XOR: "^" >
|
|
| < REM: "%" >
|
|
| < LSHIFT: "<<" >
|
|
// Notice the absence of >> or >>>, to not conflict with generics
|
|
| < PLUSASSIGN: "+=" >
|
|
| < MINUSASSIGN: "-=" >
|
|
| < STARASSIGN: "*=" >
|
|
| < SLASHASSIGN: "/=" >
|
|
| < ANDASSIGN: "&=" >
|
|
| < ORASSIGN: "|=" >
|
|
| < XORASSIGN: "^=" >
|
|
| < REMASSIGN: "%=" >
|
|
| < LSHIFTASSIGN: "<<=" >
|
|
| < RSIGNEDSHIFTASSIGN: ">>=" >
|
|
| < RUNSIGNEDSHIFTASSIGN: ">>>=" >
|
|
| < ELLIPSIS: "..." >
|
|
| < LAMBDA: "->" >
|
|
| < METHOD_REF: "::" >
|
|
}
|
|
|
|
/* >'s need special attention due to generics syntax. */
|
|
TOKEN :
|
|
{
|
|
< RUNSIGNEDSHIFT: ">>>" >
|
|
{
|
|
matchedToken.kind = GT;
|
|
((Token.GTToken)matchedToken).realKind = RUNSIGNEDSHIFT;
|
|
input_stream.backup(2);
|
|
matchedToken.image = ">";
|
|
}
|
|
| < RSIGNEDSHIFT: ">>" >
|
|
{
|
|
matchedToken.kind = GT;
|
|
((Token.GTToken)matchedToken).realKind = RSIGNEDSHIFT;
|
|
input_stream.backup(1);
|
|
matchedToken.image = ">";
|
|
}
|
|
| < GT: ">" >
|
|
}
|
|
|
|
/*****************************************
|
|
* THE JAVA LANGUAGE GRAMMAR STARTS HERE *
|
|
*****************************************/
|
|
|
|
/*
|
|
* Program structuring syntax follows.
|
|
*/
|
|
|
|
ASTCompilationUnit CompilationUnit() :
|
|
{}
|
|
{
|
|
[ LOOKAHEAD( ( Annotation() )* "package" ) PackageDeclaration() ( EmptyStatement() )* ]
|
|
( ImportDeclaration() ( EmptyStatement() )* )*
|
|
// the module decl lookahead needs to be before the type declaration branch,
|
|
// looking for annotations + "open" | "module" will fail faster if it's *not*
|
|
// a module (most common case)
|
|
[ LOOKAHEAD(ModuleDeclLahead()) ModuleDeclaration() ( EmptyStatement() )* ]
|
|
( TypeDeclaration() ( EmptyStatement() )* )*
|
|
( < "\u001a" > )?
|
|
( < "~[]" > )? // what's this for? Do you mean ( < ~[] > )*, i.e. "any character"?
|
|
<EOF>
|
|
{
|
|
jjtThis.setComments(token_source.comments);
|
|
return jjtThis;
|
|
}
|
|
}
|
|
|
|
private void ModuleDeclLahead() #void:
|
|
{}
|
|
{
|
|
(Annotation())* LOOKAHEAD({isKeyword("open") || isKeyword("module")}) <IDENTIFIER>
|
|
}
|
|
|
|
|
|
void PackageDeclaration() :
|
|
{}
|
|
{
|
|
( Annotation() )* "package" Name() ";"
|
|
}
|
|
|
|
void ImportDeclaration() :
|
|
{}
|
|
{
|
|
"import" [ "static" {checkForBadStaticImportUsage();jjtThis.setStatic();} ] Name() [ "." "*" {jjtThis.setImportOnDemand();} ] ";"
|
|
}
|
|
|
|
/*
|
|
* Modifiers. We match all modifiers in a single rule to reduce the chances of
|
|
* syntax errors for simple modifier mistakes. It will also enable us to give
|
|
* better error messages.
|
|
*/
|
|
int Modifiers() #void:
|
|
{
|
|
int modifiers = 0;
|
|
}
|
|
{
|
|
(
|
|
LOOKAHEAD(2)
|
|
(
|
|
"public" { modifiers |= AccessNode.PUBLIC; }
|
|
| "static" { modifiers |= AccessNode.STATIC; }
|
|
| "protected" { modifiers |= AccessNode.PROTECTED; }
|
|
| "private" { modifiers |= AccessNode.PRIVATE; }
|
|
| "final" { modifiers |= AccessNode.FINAL; }
|
|
| "abstract" { modifiers |= AccessNode.ABSTRACT; }
|
|
| "synchronized" { modifiers |= AccessNode.SYNCHRONIZED; }
|
|
| "native" { modifiers |= AccessNode.NATIVE; }
|
|
| "transient" { modifiers |= AccessNode.TRANSIENT; }
|
|
| "volatile" { modifiers |= AccessNode.VOLATILE; }
|
|
| "strictfp" { modifiers |= AccessNode.STRICTFP; }
|
|
| "default" { modifiers |= AccessNode.DEFAULT; checkForBadDefaultImplementationUsage(); }
|
|
| LOOKAHEAD({isKeyword("sealed")}) <IDENTIFIER> { modifiers |= AccessNode.SEALED; checkForSealedClassUsage(); }
|
|
| LOOKAHEAD({isNonSealedModifier()}) <IDENTIFIER> <MINUS> <IDENTIFIER> { modifiers |= AccessNode.NON_SEALED; checkForSealedClassUsage(); }
|
|
| Annotation()
|
|
)
|
|
)*
|
|
{
|
|
return modifiers;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Declaration syntax follows.
|
|
*/
|
|
void TypeDeclaration():
|
|
{
|
|
int modifiers;
|
|
}
|
|
{
|
|
modifiers = Modifiers()
|
|
(
|
|
ClassOrInterfaceDeclaration(modifiers)
|
|
|
|
|
LOOKAHEAD({isKeyword("enum")}) EnumDeclaration(modifiers)
|
|
|
|
|
AnnotationTypeDeclaration(modifiers)
|
|
|
|
|
LOOKAHEAD({isKeyword("record")}) RecordDeclaration(modifiers)
|
|
)
|
|
}
|
|
|
|
void ClassOrInterfaceDeclaration(int modifiers):
|
|
{
|
|
Token t = null;
|
|
jjtThis.setModifiers(modifiers);
|
|
boolean inInterfaceOld = inInterface;
|
|
inInterface = false;
|
|
}
|
|
{
|
|
( "class" | "interface" { jjtThis.setInterface(); inInterface = true; } )
|
|
t=<IDENTIFIER> { checkForBadTypeIdentifierUsage(t.image); jjtThis.setImage(t.image); }
|
|
[ TypeParameters() ]
|
|
[ ExtendsList() ]
|
|
[ ImplementsList() ]
|
|
[ LOOKAHEAD({isKeyword("permits")}) PermittedSubclasses() ]
|
|
ClassOrInterfaceBody()
|
|
{ inInterface = inInterfaceOld; } // always restore the flag after leaving the node
|
|
}
|
|
|
|
void ExtendsList():
|
|
{
|
|
boolean extendsMoreThanOne = false;
|
|
}
|
|
{
|
|
"extends" (TypeAnnotation())* ClassOrInterfaceType()
|
|
( "," (TypeAnnotation())* ClassOrInterfaceType() { extendsMoreThanOne = true; } )*
|
|
}
|
|
|
|
void ImplementsList():
|
|
{}
|
|
{
|
|
"implements" (TypeAnnotation())* ClassOrInterfaceType()
|
|
( "," (TypeAnnotation())* ClassOrInterfaceType() )*
|
|
}
|
|
|
|
void PermittedSubclasses() #PermitsList:
|
|
{
|
|
Token t;
|
|
checkForSealedClassUsage();
|
|
}
|
|
{
|
|
t = <IDENTIFIER> {
|
|
if (!"permits".equals(t.image)) {
|
|
throw new ParseException("ERROR: expecting permits");
|
|
}
|
|
}
|
|
TypeName()
|
|
( "," TypeName() )*
|
|
}
|
|
|
|
void EnumDeclaration(int modifiers):
|
|
{
|
|
|
|
Token t;
|
|
jjtThis.setModifiers(modifiers);
|
|
}
|
|
{
|
|
t = <IDENTIFIER> {
|
|
if (!"enum".equals(t.image)) {
|
|
throw new ParseException("ERROR: expecting enum");
|
|
}
|
|
|
|
if (jdkVersion < 5) {
|
|
throw new ParseException("ERROR: Can't use enum as a keyword in pre-JDK 1.5 target");
|
|
}
|
|
}
|
|
t=<IDENTIFIER> {checkForBadTypeIdentifierUsage(t.image); jjtThis.setImage(t.image);}
|
|
[ ImplementsList() ]
|
|
EnumBody()
|
|
}
|
|
|
|
void EnumBody():
|
|
{
|
|
boolean inInterfaceOld = inInterface;
|
|
inInterface = false;
|
|
}
|
|
{
|
|
"{"
|
|
[( Annotation() )* EnumConstant() ( LOOKAHEAD(2) "," ( Annotation() )* EnumConstant() )* ]
|
|
[ "," ]
|
|
[ ";" ( ClassOrInterfaceBodyDeclaration() )* ]
|
|
"}"
|
|
|
|
{ inInterface = inInterfaceOld; } // always restore the flag after leaving the node
|
|
}
|
|
|
|
void EnumConstant():
|
|
{Token t;}
|
|
{
|
|
t=<IDENTIFIER> {jjtThis.setImage(t.image);} [ Arguments() ] [ ClassOrInterfaceBody() ]
|
|
}
|
|
|
|
void RecordDeclaration(int modifiers):
|
|
{
|
|
Token t;
|
|
jjtThis.setModifiers(modifiers);
|
|
checkForRecordType();
|
|
}
|
|
{
|
|
t = <IDENTIFIER> {
|
|
if (!"record".equals(t.image)) {
|
|
throw new ParseException("ERROR: expecting record");
|
|
}
|
|
}
|
|
t=<IDENTIFIER> {checkForBadTypeIdentifierUsage(t.image); jjtThis.setImage(t.image);}
|
|
[ TypeParameters() ]
|
|
RecordHeader()
|
|
[ ImplementsList() ]
|
|
RecordBody()
|
|
}
|
|
|
|
void RecordHeader() #void:
|
|
{}
|
|
{
|
|
"(" RecordComponentList() ")"
|
|
}
|
|
|
|
void RecordComponentList() :
|
|
{}
|
|
{
|
|
[ RecordComponent() ("," RecordComponent())* ]
|
|
}
|
|
|
|
void RecordComponent():
|
|
{}
|
|
{
|
|
(RecordComponentModifier())*
|
|
Type()
|
|
[ (TypeAnnotation())* "..." {jjtThis.setVarargs();} ]
|
|
VariableDeclaratorId()
|
|
}
|
|
|
|
void RecordComponentModifier() #void:
|
|
{}
|
|
{
|
|
Annotation()
|
|
}
|
|
|
|
void RecordBody():
|
|
{}
|
|
{
|
|
"{"
|
|
( RecordBodyDeclaration() )*
|
|
"}"
|
|
}
|
|
|
|
void RecordBodyDeclaration() #void :
|
|
{}
|
|
{
|
|
LOOKAHEAD(CompactConstructorDeclarationLookahead()) CompactConstructorDeclaration()
|
|
|
|
|
ClassOrInterfaceBodyDeclaration()
|
|
}
|
|
|
|
private void CompactConstructorDeclarationLookahead() #void:
|
|
{}
|
|
{
|
|
Modifiers() <IDENTIFIER> "{"
|
|
}
|
|
|
|
void CompactConstructorDeclaration():
|
|
{
|
|
int modifiers;
|
|
}
|
|
{
|
|
modifiers = Modifiers() { jjtThis.setModifiers(modifiers); }
|
|
<IDENTIFIER> { jjtThis.setImage(token.image); }
|
|
Block()
|
|
}
|
|
|
|
void TypeParameters():
|
|
{}
|
|
{
|
|
"<" {checkForBadGenericsUsage();} TypeParameter() ( "," TypeParameter() )* ">"
|
|
}
|
|
|
|
void TypeParameter():
|
|
{Token t;}
|
|
{
|
|
(TypeAnnotation())*
|
|
t=<IDENTIFIER> {jjtThis.setImage(t.image);} [ TypeBound() ]
|
|
}
|
|
|
|
void TypeBound():
|
|
{}
|
|
{
|
|
"extends" (TypeAnnotation())* ClassOrInterfaceType() ( "&" (TypeAnnotation())* ClassOrInterfaceType() )*
|
|
}
|
|
|
|
void ClassOrInterfaceBody():
|
|
{}
|
|
{
|
|
"{" ( ClassOrInterfaceBodyDeclaration() )* "}"
|
|
}
|
|
|
|
void ClassOrInterfaceBodyDeclaration():
|
|
{
|
|
int modifiers;
|
|
}
|
|
{ LOOKAHEAD(["static"] "{" ) Initializer()
|
|
| modifiers = Modifiers()
|
|
( LOOKAHEAD(3) ClassOrInterfaceDeclaration(modifiers)
|
|
| LOOKAHEAD({isKeyword("enum")}) EnumDeclaration(modifiers)
|
|
| LOOKAHEAD({isKeyword("record")}) RecordDeclaration(modifiers)
|
|
| LOOKAHEAD( [ TypeParameters() ] <IDENTIFIER> "(" ) ConstructorDeclaration(modifiers)
|
|
| LOOKAHEAD( Type() <IDENTIFIER> ( (Annotation())* "[" "]" )* ( "," | "=" | ";" ) ) FieldDeclaration(modifiers)
|
|
| LOOKAHEAD(2) MethodDeclaration(modifiers)
|
|
| LOOKAHEAD(2) AnnotationTypeDeclaration(modifiers)
|
|
)
|
|
|
|
|
";"
|
|
}
|
|
|
|
|
|
void FieldDeclaration(int modifiers) :
|
|
{jjtThis.setModifiers(modifiers);}
|
|
{
|
|
Type() VariableDeclarator() ( "," VariableDeclarator() )* ";"
|
|
}
|
|
|
|
void VariableDeclarator() :
|
|
{}
|
|
{
|
|
VariableDeclaratorId() [ "=" VariableInitializer() ]
|
|
}
|
|
|
|
void VariableDeclaratorId() :
|
|
{
|
|
Token t;
|
|
String image;
|
|
}
|
|
{
|
|
(LOOKAHEAD(2) t=<IDENTIFIER> "." <THIS> { checkforBadExplicitReceiverParameter(); jjtThis.setExplicitReceiverParameter(); image=t.image + ".this"; }
|
|
| t=<THIS> { checkforBadExplicitReceiverParameter(); jjtThis.setExplicitReceiverParameter(); image = t.image;}
|
|
| t=<IDENTIFIER> { image = t.image; } ( (TypeAnnotation())* "[" "]" { jjtThis.bumpArrayDepth(); })*
|
|
)
|
|
{
|
|
checkForBadAssertUsage(image, "a variable name");
|
|
checkForBadEnumUsage(image, "a variable name");
|
|
checkForBadIdentifier(image);
|
|
jjtThis.setImage( image );
|
|
}
|
|
}
|
|
|
|
void VariableInitializer() :
|
|
{}
|
|
{
|
|
ArrayInitializer()
|
|
| Expression()
|
|
}
|
|
|
|
void ArrayInitializer() :
|
|
{}
|
|
{
|
|
"{" [ VariableInitializer() ( LOOKAHEAD(2) "," VariableInitializer() )* ] [ "," ] "}"
|
|
}
|
|
|
|
void MethodDeclaration(int modifiers) :
|
|
{
|
|
jjtThis.setModifiers(modifiers);
|
|
{ checkForBadPrivateInterfaceMethod(jjtThis); }
|
|
}
|
|
{
|
|
[ TypeParameters() ]
|
|
(TypeAnnotation())* ResultType() MethodDeclarator() [ "throws" NameList() ]
|
|
( Block() | ";" )
|
|
}
|
|
|
|
void MethodDeclarator() :
|
|
{Token t;}
|
|
{
|
|
t=<IDENTIFIER>
|
|
{
|
|
checkForBadAssertUsage(t.image, "a method name");
|
|
checkForBadEnumUsage(t.image, "a method name");
|
|
jjtThis.setImage( t.image );
|
|
}
|
|
FormalParameters() ( (TypeAnnotation())* "[" "]" )*
|
|
}
|
|
|
|
|
|
void FormalParameters() :
|
|
{}
|
|
{
|
|
"(" [ FormalParameter() ( "," FormalParameter() )* ] ")"
|
|
}
|
|
|
|
void FormalParameter() :
|
|
{
|
|
}
|
|
{
|
|
( "final" {jjtThis.setFinal(true);} | Annotation() )*
|
|
Type() ("|" {checkForBadMultipleExceptionsCatching();} (TypeAnnotation())* Type())*
|
|
[ (TypeAnnotation())* "..." {checkForBadVariableArgumentsUsage();} {jjtThis.setVarargs();} ]
|
|
VariableDeclaratorId()
|
|
}
|
|
|
|
void ConstructorDeclaration(int modifiers) :
|
|
{jjtThis.setModifiers(modifiers);
|
|
Token t;}
|
|
{
|
|
[ TypeParameters() ]
|
|
<IDENTIFIER> {jjtThis.setImage(getToken(0).getImage());} FormalParameters() [ "throws" NameList() ]
|
|
"{"
|
|
[ LOOKAHEAD(ExplicitConstructorInvocation()) ExplicitConstructorInvocation() ]
|
|
( BlockStatement() )*
|
|
t = "}" { if (isPrecededByComment(t)) { jjtThis.setContainsComment(); } }
|
|
}
|
|
|
|
void ExplicitConstructorInvocation() :
|
|
{boolean prev = inExplicitConstructorInvoc; inExplicitConstructorInvoc = true;}
|
|
{ (
|
|
LOOKAHEAD([TypeArguments()] "this" Arguments() ";") [TypeArguments()] "this" {jjtThis.setIsThis();}
|
|
|
|
|
[ LOOKAHEAD(PrimaryExpression() "." [TypeArguments()] "super" ) PrimaryExpression() "." ] [ TypeArguments() ] "super" {jjtThis.setIsSuper();}
|
|
)
|
|
{inExplicitConstructorInvoc = prev;}
|
|
Arguments() ";"
|
|
}
|
|
|
|
void Initializer() :
|
|
{}
|
|
{
|
|
[ "static" {jjtThis.setStatic();} ] Block()
|
|
}
|
|
|
|
|
|
/*
|
|
* Type, name and expression syntax follows.
|
|
* Type is the same as "UnannType" in JLS
|
|
*
|
|
* See https://docs.oracle.com/javase/specs/jls/se10/html/jls-8.html#jls-UnannType
|
|
*/
|
|
void Type():
|
|
{
|
|
Token t;
|
|
}
|
|
{
|
|
LOOKAHEAD(<IDENTIFIER> | PrimitiveType() (TypeAnnotation())* "[" "]" ) ReferenceType()
|
|
| PrimitiveType()
|
|
}
|
|
|
|
void ReferenceType():
|
|
{}
|
|
{
|
|
PrimitiveType() (LOOKAHEAD((TypeAnnotation())* "[" "]") (TypeAnnotation())* "[" "]" { jjtThis.bumpArrayDepth(); })+
|
|
|
|
|
ClassOrInterfaceType() (LOOKAHEAD((TypeAnnotation())* "[" "]") (TypeAnnotation())* "[" "]" { jjtThis.bumpArrayDepth(); })*
|
|
}
|
|
|
|
void ClassOrInterfaceType():
|
|
{
|
|
StringBuilder s = new StringBuilder();
|
|
Token t;
|
|
}
|
|
{
|
|
t=<IDENTIFIER> {s.append(t.image);}
|
|
[ LOOKAHEAD(2) TypeArguments() ]
|
|
( LOOKAHEAD(2) "." (TypeAnnotation())* t=<IDENTIFIER> {s.append('.').append(t.image);} [ LOOKAHEAD(2) TypeArguments() ] )*
|
|
{jjtThis.setImage(s.toString());}
|
|
}
|
|
|
|
void TypeName() #ClassOrInterfaceType:
|
|
{
|
|
StringBuilder s = new StringBuilder();
|
|
Token t;
|
|
}
|
|
{
|
|
t=<IDENTIFIER> {s.append(t.image);}
|
|
( "." t=<IDENTIFIER> {s.append('.').append(t.image);} )*
|
|
{jjtThis.setImage(s.toString());}
|
|
}
|
|
|
|
void TypeArguments():
|
|
{}
|
|
{
|
|
LOOKAHEAD(2)
|
|
"<" {checkForBadGenericsUsage();} TypeArgument() ( "," TypeArgument() )* ">"
|
|
|
|
|
"<" {checkForBadDiamondUsage();} ">"
|
|
}
|
|
|
|
void TypeArgument():
|
|
{}
|
|
{
|
|
(TypeAnnotation())* (ReferenceType() | "?" [ WildcardBounds() ])
|
|
}
|
|
|
|
void WildcardBounds():
|
|
{}
|
|
{
|
|
("extends" | "super") (TypeAnnotation())* ReferenceType()
|
|
}
|
|
|
|
void PrimitiveType() :
|
|
{}
|
|
{
|
|
"boolean" {jjtThis.setImage("boolean");}
|
|
| "char" {jjtThis.setImage("char");}
|
|
| "byte" {jjtThis.setImage("byte");}
|
|
| "short" {jjtThis.setImage("short");}
|
|
| "int" {jjtThis.setImage("int");}
|
|
| "long" {jjtThis.setImage("long");}
|
|
| "float" {jjtThis.setImage("float");}
|
|
| "double" {jjtThis.setImage("double");}
|
|
}
|
|
|
|
|
|
void ResultType() :
|
|
{}
|
|
{
|
|
"void" | Type()
|
|
}
|
|
|
|
void Name() :
|
|
/*
|
|
* A lookahead of 2 is required below since "Name" can be followed
|
|
* by a ".*" when used in the context of an "ImportDeclaration".
|
|
*/
|
|
{
|
|
StringBuilder s = new StringBuilder();
|
|
Token t;
|
|
}
|
|
{
|
|
t=<IDENTIFIER>
|
|
{
|
|
s.append(t.image);
|
|
}
|
|
( LOOKAHEAD(2) "." t=<IDENTIFIER>
|
|
{s.append('.').append(t.image);}
|
|
)*
|
|
{jjtThis.setImage(s.toString());}
|
|
}
|
|
|
|
void NameList() :
|
|
{}
|
|
{
|
|
(TypeAnnotation())* Name()
|
|
( "," (TypeAnnotation())* Name()
|
|
)*
|
|
}
|
|
|
|
|
|
/*
|
|
* Expression syntax follows.
|
|
*/
|
|
|
|
void Expression() :
|
|
/*
|
|
* This expansion has been written this way instead of:
|
|
* Assignment() | ConditionalExpression()
|
|
* for performance reasons.
|
|
* However, it is a weakening of the grammar for it allows the LHS of
|
|
* assignments to be any conditional expression whereas it can only be
|
|
* a primary expression. Consider adding a semantic predicate to work
|
|
* around this.
|
|
*/
|
|
// It also allows lambda expressions in many more contexts as allowed by the JLS.
|
|
// Lambda expressions are not a PrimaryExpression in the JLS, instead they're
|
|
// separated from the AssignmentExpression production. Their use is restricted
|
|
// to method and constructor argument, cast operand, and the RHS of assignments.
|
|
// https://docs.oracle.com/javase/specs/jls/se9/html/jls-15.html#jls-15.27
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|
//
|
|
// To prevent LambdaExpressions in switch labels, the field #inSwitchLabel is used
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|
// as a workaround.
|
|
{}
|
|
{
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|
ConditionalExpression()
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[
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LOOKAHEAD(2) AssignmentOperator() Expression()
|
|
]
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|
}
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|
|
|
void AssignmentOperator() :
|
|
{}
|
|
{
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"=" {jjtThis.setImage("=");}
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| "*=" {jjtThis.setImage("*="); jjtThis.setCompound();}
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| "/=" {jjtThis.setImage("/="); jjtThis.setCompound();}
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|
| "%=" {jjtThis.setImage("%="); jjtThis.setCompound();}
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| "+=" {jjtThis.setImage("+="); jjtThis.setCompound();}
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| "-=" {jjtThis.setImage("-="); jjtThis.setCompound();}
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| "<<=" {jjtThis.setImage("<<="); jjtThis.setCompound();}
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|
| ">>=" {jjtThis.setImage(">>="); jjtThis.setCompound();}
|
|
| ">>>=" {jjtThis.setImage(">>>="); jjtThis.setCompound();}
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| "&=" {jjtThis.setImage("&="); jjtThis.setCompound();}
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| "^=" {jjtThis.setImage("^="); jjtThis.setCompound();}
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| "|=" {jjtThis.setImage("|="); jjtThis.setCompound();}
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}
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|
|
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void ConditionalExpression() #ConditionalExpression(>1) :
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|
{}
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|
{
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ConditionalOrExpression() [ LOOKAHEAD(2) "?" Expression() ":" ConditionalExpression() ]
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}
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|
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void ConditionalOrExpression() #ConditionalOrExpression(>1):
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|
{}
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|
{
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ConditionalAndExpression() ( LOOKAHEAD(2) "||" ConditionalAndExpression() )*
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|
}
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|
|
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void ConditionalAndExpression() #ConditionalAndExpression(>1):
|
|
{}
|
|
{
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InclusiveOrExpression() ( LOOKAHEAD(2) "&&" InclusiveOrExpression() )*
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|
}
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|
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void InclusiveOrExpression() #InclusiveOrExpression(>1) :
|
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{}
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{
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ExclusiveOrExpression() ( LOOKAHEAD(2) "|" ExclusiveOrExpression() )*
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}
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|
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void ExclusiveOrExpression() #ExclusiveOrExpression(>1) :
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{}
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{
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AndExpression() ( LOOKAHEAD(2) "^" AndExpression() )*
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}
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|
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void AndExpression() #AndExpression(>1):
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{}
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|
{
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EqualityExpression() ( LOOKAHEAD(2) "&" EqualityExpression() )*
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}
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|
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void EqualityExpression() #EqualityExpression(>1):
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|
{}
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{
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InstanceOfExpression() ( LOOKAHEAD(2) ( "==" {jjtThis.setImage("==");} | "!=" {jjtThis.setImage("!=");} ) InstanceOfExpression() )*
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}
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|
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void Pattern() #void:
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{}
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|
{
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LOOKAHEAD((Annotation())* ReferenceType() "(") RecordPattern()
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| LOOKAHEAD("(") ParenthesizedPattern()
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| TypePattern()
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}
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|
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void ParenthesizedPattern() #void:
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{checkForParenthesizedPattern();}
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{
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"(" Pattern() ")" { AstImplUtil.bumpParenDepth((ASTPattern) jjtree.peekNode()); }
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}
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void TypePattern():
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{checkforBadInstanceOfPattern();}
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{
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( "final" {jjtThis.setFinal(true);} | Annotation() )*
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Type()
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VariableDeclaratorId()
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}
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|
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void RecordPattern():
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{ checkForRecordPatterns(); }
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|
{
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(Annotation())* ReferenceType() RecordStructurePattern() [ VariableDeclaratorId() ]
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}
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|
|
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void RecordStructurePattern() #ComponentPatternList:
|
|
{}
|
|
{
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"(" [ RecordComponentPatternList() ] ")"
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|
}
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|
|
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void RecordComponentPatternList() #void:
|
|
{}
|
|
{
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Pattern() ( "," Pattern() )*
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}
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|
|
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void InstanceOfExpression() #InstanceOfExpression(>1):
|
|
{}
|
|
{
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RelationalExpression()
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[ "instanceof"
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(
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LOOKAHEAD(Pattern()) Pattern()
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| (Annotation())* Type()
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)
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|
]
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|
}
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|
|
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void RelationalExpression() #RelationalExpression(>1):
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{}
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|
{
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ShiftExpression()
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( LOOKAHEAD(2)
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( "<" {jjtThis.setImage("<");}
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| ">" {jjtThis.setImage(">");}
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| "<=" {jjtThis.setImage("<=");}
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| ">=" {jjtThis.setImage(">=");}
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) ShiftExpression() )*
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}
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|
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void ShiftExpression() #ShiftExpression(>1):
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|
{}
|
|
{
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AdditiveExpression()
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( LOOKAHEAD(2)
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( "<<" { jjtThis.setImage("<<");}
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| RSIGNEDSHIFT() { jjtThis.setImage(">>"); }
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| RUNSIGNEDSHIFT() { jjtThis.setImage(">>>"); }
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) AdditiveExpression() )*
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|
}
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|
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void AdditiveExpression() #AdditiveExpression(>1):
|
|
{}
|
|
{
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|
MultiplicativeExpression() ( LOOKAHEAD(2) ( "+" {jjtThis.setImage("+");} | "-" {jjtThis.setImage("-");} ) MultiplicativeExpression() )*
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|
}
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|
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void MultiplicativeExpression() #MultiplicativeExpression(>1):
|
|
{}
|
|
{
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UnaryExpression() ( LOOKAHEAD(2) ( "*" {jjtThis.setImage("*");} | "/" {jjtThis.setImage("/");} | "%" {jjtThis.setImage("%");}) UnaryExpression() )*
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}
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void UnaryExpression() #UnaryExpression((jjtn000.getImage() != null)):
|
|
{}
|
|
{
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("+" {jjtThis.setImage("+");} | "-" {jjtThis.setImage("-");}) UnaryExpression()
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| PreIncrementExpression()
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| PreDecrementExpression()
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| UnaryExpressionNotPlusMinus()
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}
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|
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void PreIncrementExpression() :
|
|
{}
|
|
{
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"++" PrimaryExpression()
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}
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|
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void PreDecrementExpression() :
|
|
{}
|
|
{
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"--" PrimaryExpression()
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|
}
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|
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void UnaryExpressionNotPlusMinus() #UnaryExpressionNotPlusMinus((jjtn000.getImage() != null)):
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|
{}
|
|
{
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( "~" {jjtThis.setImage("~");} | "!" {jjtThis.setImage("!");} ) UnaryExpression()
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/*
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|
* This is really ugly... we are repeating the CastExpression lookahead and full expression...
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|
* If we don't the lookahead within CastExpression is ignored, and it simply looks for the expression,
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|
* meaning we can't be explicit as to what can be casted depending on the cast type (primitive or otherwise)
|
|
*/
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|
| LOOKAHEAD("(" (Annotation())* PrimitiveType() ")") CastExpression()
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| LOOKAHEAD("(" (Annotation())* Type() ( "&" ReferenceType() )* ")" UnaryExprNotPmStart()) CastExpression()
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| PostfixExpression() // this may be a parenthesized expr, which is why we have lookaheads
|
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| SwitchExpression()
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|
}
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|
|
|
|
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private void UnaryExprNotPmStart() #void:
|
|
{}
|
|
{
|
|
// Condensed FIRST set of UnaryExpressionNotPlusMinus
|
|
// Avoid looking ahead for a whole UnaryExpressionNotPlusMinus, but just for a token
|
|
|
|
"~" | "!" | "(" | "switch" | "new" | "this" | "super" | Literal() | "@"
|
|
| <IDENTIFIER>
|
|
| "void" | PrimitiveType()
|
|
}
|
|
|
|
void PostfixExpression() #PostfixExpression((jjtn000.getImage() != null)):
|
|
{}
|
|
{
|
|
PrimaryExpression() [ "++" {jjtThis.setImage("++");} | "--" {jjtThis.setImage("--");} ]
|
|
}
|
|
|
|
void CastExpression() :
|
|
{}
|
|
{
|
|
LOOKAHEAD(
|
|
"(" (Annotation())* PrimitiveType() ")"
|
|
) "(" (TypeAnnotation())* Type() ")" UnaryExpression()
|
|
| "(" (TypeAnnotation())* Type() ( "&" {checkForBadIntersectionTypesInCasts(); jjtThis.setIntersectionTypes(true);} ReferenceType() )* ")" UnaryExpressionNotPlusMinus()
|
|
}
|
|
|
|
void SwitchExpression() :
|
|
{boolean prevInSwitchBlock = inSwitchExprBlock;}
|
|
{
|
|
{checkForSwitchExpression();}
|
|
"switch" "(" Expression() ")"
|
|
{inSwitchExprBlock = true;}
|
|
SwitchBlock()
|
|
{inSwitchExprBlock = prevInSwitchBlock;}
|
|
}
|
|
|
|
void PrimaryExpression() :
|
|
{}
|
|
{
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|
PrimaryPrefix() ( LOOKAHEAD(SuffixLAhead()) PrimarySuffix() )*
|
|
}
|
|
|
|
private void SuffixLAhead() #void:
|
|
{}
|
|
{
|
|
"::" | "[" | "("
|
|
| LOOKAHEAD({!inExplicitConstructorInvoc}) "."
|
|
| LOOKAHEAD({inExplicitConstructorInvoc}) "." (<IDENTIFIER> | TypeArguments() <IDENTIFIER> | "new") // not super or this in this case
|
|
}
|
|
|
|
|
|
void MemberSelector():
|
|
{
|
|
Token t;
|
|
}
|
|
{
|
|
"." TypeArguments() t=<IDENTIFIER> {jjtThis.setImage(t.image);}
|
|
| MethodReference()
|
|
}
|
|
|
|
void MethodReference() :
|
|
{Token t; checkForBadMethodReferenceUsage();}
|
|
{
|
|
"::" [TypeArguments()] ( "new" {jjtThis.setImage("new");} | t=<IDENTIFIER> {jjtThis.setImage(t.image);} )
|
|
}
|
|
|
|
void PrimaryPrefix() :
|
|
{Token t;}
|
|
{
|
|
Literal()
|
|
| LOOKAHEAD(2) "this" {jjtThis.setUsesThisModifier();}
|
|
| "super" {jjtThis.setUsesSuperModifier();}
|
|
| LOOKAHEAD( <IDENTIFIER> "->", {!inSwitchLabel} ) LambdaExpression()
|
|
| LOOKAHEAD( "(" VariableDeclaratorId() ( "," VariableDeclaratorId() )* ")" "->", {!inSwitchLabel} ) LambdaExpression()
|
|
| LOOKAHEAD( FormalParameters() "->", {!inSwitchLabel} ) LambdaExpression()
|
|
| LOOKAHEAD(3) "(" Expression() ")"
|
|
| AllocationExpression()
|
|
| LOOKAHEAD( ResultType() "." "class" ) ResultType() "." "class"
|
|
| LOOKAHEAD( Name() "::" ) Name() // followed by method reference in PrimarySuffix
|
|
| LOOKAHEAD( "@" | Type() "::" ) (Annotation())* (LOOKAHEAD(2) ReferenceType()|PrimitiveType()) // followed by method reference in PrimarySuffix
|
|
| Name()
|
|
}
|
|
|
|
void LambdaExpression() :
|
|
{ checkForBadLambdaUsage(); }
|
|
{
|
|
VariableDeclaratorId() "->" ( Expression() | Block() )
|
|
| LOOKAHEAD(3) LambdaParameters() "->" ( Expression() | Block() )
|
|
| LOOKAHEAD(3) "(" VariableDeclaratorId() ( "," VariableDeclaratorId() )* ")" "->" ( Expression() | Block() )
|
|
}
|
|
|
|
void LambdaParameters() #FormalParameters :
|
|
{}
|
|
{
|
|
"(" [ LambdaParameterList() ] ")"
|
|
}
|
|
|
|
void LambdaParameterList() #void :
|
|
{}
|
|
{
|
|
LambdaParameter() ( "," LambdaParameter() )*
|
|
}
|
|
|
|
void LambdaParameter() #FormalParameter :
|
|
{}
|
|
{
|
|
( "final" {jjtThis.setFinal(true);} | Annotation() )*
|
|
LambdaParameterType()
|
|
[(TypeAnnotation())* "..." {checkForBadVariableArgumentsUsage();} {jjtThis.setVarargs();} ]
|
|
VariableDeclaratorId()
|
|
}
|
|
|
|
void LambdaParameterType() #void :
|
|
{}
|
|
{
|
|
LOOKAHEAD( { jdkVersion >= 11 && isKeyword("var") } ) <IDENTIFIER>
|
|
| Type()
|
|
}
|
|
|
|
void PrimarySuffix() :
|
|
{Token t;}
|
|
{ LOOKAHEAD(2) "." "this"
|
|
| LOOKAHEAD(2) "." "super"
|
|
| LOOKAHEAD(2) "." AllocationExpression()
|
|
| LOOKAHEAD(3) MemberSelector()
|
|
| "[" Expression() "]" {jjtThis.setIsArrayDereference();}
|
|
| "." t=<IDENTIFIER> {jjtThis.setImage(t.image);}
|
|
| Arguments() {jjtThis.setIsArguments();}
|
|
}
|
|
|
|
void Literal() :
|
|
{ Token t;}
|
|
{
|
|
t=<INTEGER_LITERAL> { checkForBadNumericalLiteralslUsage(t); jjtThis.setImage(t.image); jjtThis.setIntLiteral();}
|
|
| t=<FLOATING_POINT_LITERAL> { checkForBadNumericalLiteralslUsage(t); jjtThis.setImage(t.image); jjtThis.setFloatLiteral();}
|
|
| t=<HEX_FLOATING_POINT_LITERAL> { checkForBadHexFloatingPointLiteral(); checkForBadNumericalLiteralslUsage(t); jjtThis.setImage(t.image); jjtThis.setFloatLiteral();}
|
|
| t=<CHARACTER_LITERAL> {jjtThis.setImage(t.image); jjtThis.setCharLiteral();}
|
|
| t=<STRING_LITERAL> {jjtThis.setImage(t.image); checkForNewStringSpaceEscape(t.image); jjtThis.setStringLiteral(); }
|
|
| t=<TEXT_BLOCK_LITERAL> { checkForTextBlockLiteral(); checkForNewStringSpaceEscape(t.image); jjtThis.setImage(t.image); jjtThis.setStringLiteral();}
|
|
| BooleanLiteral()
|
|
| NullLiteral()
|
|
}
|
|
|
|
void BooleanLiteral() :
|
|
{}
|
|
{
|
|
"true" { jjtThis.setTrue(); } | "false"
|
|
}
|
|
|
|
void NullLiteral() :
|
|
{}
|
|
{ "null" }
|
|
|
|
void Arguments() :
|
|
{}
|
|
{
|
|
"(" [ ArgumentList() ] ")"
|
|
}
|
|
|
|
void ArgumentList() :
|
|
{}
|
|
{
|
|
Expression() ( "," Expression() )*
|
|
}
|
|
|
|
void AllocationExpression():
|
|
{}
|
|
{
|
|
"new"
|
|
(LOOKAHEAD((TypeAnnotation())* PrimitiveType())
|
|
(TypeAnnotation())* PrimitiveType() ArrayDimsAndInits()
|
|
|
|
|
[TypeArguments()]
|
|
(TypeAnnotation())*
|
|
ClassOrInterfaceType()
|
|
(
|
|
ArrayDimsAndInits()
|
|
|
|
|
Arguments()
|
|
[
|
|
{ boolean inInterfaceOld = inInterface; inInterface = false; /* a anonymous class is not a interface */ }
|
|
ClassOrInterfaceBody()
|
|
{ inInterface = inInterfaceOld; } // always restore the flag after leaving the node
|
|
]
|
|
)
|
|
{ checkForBadAnonymousDiamondUsage(); }
|
|
)
|
|
}
|
|
|
|
/*
|
|
* The second LOOKAHEAD specification below is to parse to PrimarySuffix
|
|
* if there is an expression between the "[...]".
|
|
*/
|
|
void ArrayDimsAndInits() :
|
|
{}
|
|
{
|
|
LOOKAHEAD((TypeAnnotation())* "[" "]") ((TypeAnnotation())* "[" "]" {jjtThis.bumpArrayDepth();})+ ArrayInitializer()
|
|
| ( LOOKAHEAD((TypeAnnotation())* "[" UnaryExprNotPmStart() ) (TypeAnnotation())* "[" Expression() "]" {jjtThis.bumpArrayDepth();} )+
|
|
( LOOKAHEAD((TypeAnnotation())* "[") (TypeAnnotation())* "[" "]" {jjtThis.bumpArrayDepth();} )*
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Statement syntax follows.
|
|
*/
|
|
|
|
void Statement() :
|
|
{}
|
|
{
|
|
LOOKAHEAD( { isNextTokenAnAssert() } ) AssertStatement()
|
|
| LOOKAHEAD( { isYieldStart() } ) YieldStatement()
|
|
| LOOKAHEAD(2) LabeledStatement()
|
|
| Block()
|
|
| EmptyStatement()
|
|
| StatementExpression() ";"
|
|
| SwitchStatement()
|
|
| IfStatement()
|
|
| WhileStatement()
|
|
| DoStatement()
|
|
| ForStatement()
|
|
| BreakStatement()
|
|
| ContinueStatement()
|
|
| ReturnStatement()
|
|
| ThrowStatement()
|
|
| SynchronizedStatement()
|
|
| TryStatement()
|
|
}
|
|
|
|
void LabeledStatement() :
|
|
{Token t;}
|
|
{
|
|
t=<IDENTIFIER> {jjtThis.setImage(t.image);} ":" Statement()
|
|
}
|
|
|
|
void Block() :
|
|
{Token t;}
|
|
{
|
|
"{"
|
|
|
|
( BlockStatement() )* t = "}" { if (isPrecededByComment(t)) { jjtThis.setContainsComment(); } }
|
|
}
|
|
|
|
void BlockStatement():
|
|
{int mods = 0;}
|
|
{
|
|
LOOKAHEAD( { isNextTokenAnAssert() } ) AssertStatement()
|
|
| LOOKAHEAD( { isYieldStart() } ) YieldStatement()
|
|
| LOOKAHEAD( "@" | "final" )
|
|
// this eagerly parses all modifiers and annotations. After that, either a local type declaration
|
|
// or a local variable declaration follows.
|
|
// This allows more modifiers for local variables than actually allowed
|
|
// and the annotations for local variables need to be moved in the AST down again.
|
|
mods=Modifiers()
|
|
(
|
|
LOOKAHEAD({localTypeDeclLookahead()}) LocalTypeDecl(mods)
|
|
|
|
|
{
|
|
List<Node> annotationsAndChildren = new ArrayList<Node>();
|
|
if (jjtree.nodeArity() > 0) { // peekNode would throw if the stack is empty
|
|
while (jjtree.peekNode() instanceof ASTAnnotation) {
|
|
annotationsAndChildren.add(jjtree.popNode());
|
|
}
|
|
}
|
|
}
|
|
LocalVariableDeclaration()
|
|
{
|
|
ASTLocalVariableDeclaration localVarDecl = (ASTLocalVariableDeclaration) jjtree.peekNode();
|
|
if ((mods & AccessNode.FINAL) == AccessNode.FINAL) {
|
|
localVarDecl.setFinal(true);
|
|
}
|
|
if (!annotationsAndChildren.isEmpty()) {
|
|
Collections.reverse(annotationsAndChildren);
|
|
for (int i = 0; i < localVarDecl.getNumChildren(); i++) {
|
|
annotationsAndChildren.add(localVarDecl.getChild(i));
|
|
}
|
|
for (int i = 0; i < annotationsAndChildren.size(); i++) {
|
|
Node child = annotationsAndChildren.get(i);
|
|
child.jjtSetParent(localVarDecl);
|
|
localVarDecl.jjtAddChild(child, i);
|
|
}
|
|
}
|
|
}
|
|
";"
|
|
)
|
|
| LOOKAHEAD({classModifierForLocalTypesLookahead() || localTypeDeclLookahead()})
|
|
mods=Modifiers()
|
|
LocalTypeDecl(mods)
|
|
| LOOKAHEAD(Type() <IDENTIFIER>)
|
|
LocalVariableDeclaration() ";"
|
|
|
|
|
Statement()
|
|
}
|
|
|
|
void LocalTypeDecl(int mods) #void:
|
|
{}
|
|
{
|
|
(
|
|
LOOKAHEAD(<CLASS>) ClassOrInterfaceDeclaration(mods)
|
|
| LOOKAHEAD(<INTERFACE>) ClassOrInterfaceDeclaration(mods) { checkForLocalInterfaceOrEnumType(); }
|
|
| LOOKAHEAD({isKeyword("record")}) RecordDeclaration(mods) { checkForLocalInterfaceOrEnumType(); }
|
|
| LOOKAHEAD({isKeyword("enum")}) EnumDeclaration(mods) { checkForLocalInterfaceOrEnumType(); }
|
|
)
|
|
}
|
|
|
|
/*
|
|
* See https://docs.oracle.com/javase/specs/jls/se10/html/jls-14.html#jls-14.4
|
|
*/
|
|
void LocalVariableDeclaration() :
|
|
{}
|
|
{
|
|
( "final" {jjtThis.setFinal(true);} | Annotation() )*
|
|
LocalVariableType()
|
|
VariableDeclarator()
|
|
( "," VariableDeclarator() )*
|
|
}
|
|
|
|
void LocalVariableType() #void :
|
|
{}
|
|
{
|
|
LOOKAHEAD( { jdkVersion >= 10 && isKeyword("var") } ) <IDENTIFIER>
|
|
| Type()
|
|
}
|
|
|
|
void EmptyStatement() :
|
|
{}
|
|
{
|
|
";"
|
|
}
|
|
|
|
void StatementExpression() :
|
|
{}
|
|
{
|
|
PreIncrementExpression()
|
|
|
|
|
PreDecrementExpression()
|
|
|
|
|
// using PostfixExpression here allows us to skip the part of the production tree
|
|
// between Expression() and PostfixExpression()
|
|
PostfixExpression() [ AssignmentOperator() Expression() ]
|
|
}
|
|
|
|
void SwitchStatement():
|
|
{}
|
|
{
|
|
"switch" "(" Expression() ")" SwitchBlock()
|
|
}
|
|
|
|
void SwitchBlock() #void :
|
|
{}
|
|
{
|
|
"{"
|
|
(
|
|
SwitchLabel()
|
|
(
|
|
"->" SwitchLabeledRulePart() (SwitchLabeledRule())*
|
|
|
|
|
":" (LOOKAHEAD(2) SwitchLabel() ":")*
|
|
// the lookahead is to prevent choosing BlockStatement when the token is "default",
|
|
// which could happen as local class declarations accept the "default" modifier.
|
|
(LOOKAHEAD({shouldStartStatementInSwitch()}) BlockStatement())*
|
|
(SwitchLabeledStatementGroup())*
|
|
)
|
|
)?
|
|
"}"
|
|
}
|
|
|
|
void SwitchLabeledRule() #void :
|
|
{checkForSwitchRules();}
|
|
{
|
|
SwitchLabel() "->" SwitchLabeledRulePart()
|
|
}
|
|
|
|
void SwitchLabeledRulePart() #void:
|
|
{checkForSwitchRules();}
|
|
{
|
|
(
|
|
( Expression() ";" ) #SwitchLabeledExpression(2)
|
|
|
|
|
( Block() ) #SwitchLabeledBlock(2)
|
|
|
|
|
( ThrowStatement() ) #SwitchLabeledThrowStatement(2)
|
|
)
|
|
}
|
|
|
|
// For PMD 7, make this a real node to group the labels + statements
|
|
void SwitchLabeledStatementGroup() #void:
|
|
{}
|
|
{
|
|
(LOOKAHEAD(2) SwitchLabel() ":")+
|
|
// the lookahead is to prevent choosing BlockStatement when the token is "default",
|
|
// which could happen as local class declarations accept the "default" modifier.
|
|
(LOOKAHEAD({shouldStartStatementInSwitch()}) BlockStatement() )*
|
|
}
|
|
|
|
void SwitchLabel() :
|
|
{}
|
|
{
|
|
{ inSwitchLabel = true; }
|
|
(
|
|
"case" CaseLabelElement(jjtThis) ( {checkForMultipleCaseLabels();} "," CaseLabelElement(jjtThis) )*
|
|
|
|
|
"default" {jjtThis.setDefault();}
|
|
)
|
|
{ inSwitchLabel = false; }
|
|
}
|
|
|
|
void CaseLabelElement(ASTSwitchLabel label) #void:
|
|
{}
|
|
{
|
|
"default" {label.setDefault(); checkForDefaultCaseLabel();} // only valid in java-19-preview
|
|
|
|
|
NullLiteral() {checkForNullCaseLabel();}
|
|
[
|
|
// this lookahead is only required to allow parsing java-19-preview code
|
|
// since java-20-preview, combining null is only allowed with default
|
|
LOOKAHEAD(2)
|
|
"," "default" {label.setDefault(); checkForNullWithDefaultCaseLabel();}
|
|
]
|
|
|
|
|
LOOKAHEAD(Pattern()) Pattern() {checkForPatternMatchingInSwitch();} ( LOOKAHEAD({isKeyword("when")}) Guard() )*
|
|
|
|
|
ConditionalExpression() #Expression
|
|
}
|
|
|
|
void Guard() #SwitchGuard:
|
|
{
|
|
Token t;
|
|
checkForGuard();
|
|
}
|
|
{
|
|
t = <IDENTIFIER> {
|
|
if (!"when".equals(t.image)) {
|
|
throw new ParseException("ERROR: expected 'when'");
|
|
}
|
|
}
|
|
|
|
Expression()
|
|
}
|
|
|
|
void YieldStatement() :
|
|
{ checkForYieldStatement(); }
|
|
{
|
|
<IDENTIFIER> Expression() ";"
|
|
}
|
|
|
|
void IfStatement() :
|
|
/*
|
|
* The disambiguating algorithm of JavaCC automatically binds dangling
|
|
* else's to the innermost if statement. The LOOKAHEAD specification
|
|
* is to tell JavaCC that we know what we are doing.
|
|
*/
|
|
{}
|
|
{
|
|
"if" "(" Expression() ")" Statement() [ LOOKAHEAD(1) "else" {jjtThis.setHasElse();} Statement() ]
|
|
}
|
|
|
|
void WhileStatement() :
|
|
{}
|
|
{
|
|
"while" "(" Expression() ")" Statement()
|
|
}
|
|
|
|
void DoStatement() :
|
|
{}
|
|
{
|
|
"do" Statement() "while" "(" Expression() ")" ";"
|
|
}
|
|
|
|
void ForStatement() :
|
|
{}
|
|
{
|
|
"for" "("
|
|
(
|
|
LOOKAHEAD(LocalVariableDeclaration() ":")
|
|
{checkForBadJDK15ForLoopSyntaxArgumentsUsage();}
|
|
LocalVariableDeclaration() ":" Expression()
|
|
|
|
|
[ ForInit() ] ";"
|
|
[ Expression() ] ";"
|
|
[ ForUpdate() ]
|
|
)
|
|
")" Statement()
|
|
}
|
|
|
|
void ForInit() :
|
|
{}
|
|
{
|
|
LOOKAHEAD( LocalVariableDeclaration() )
|
|
LocalVariableDeclaration()
|
|
|
|
|
StatementExpressionList()
|
|
}
|
|
|
|
void StatementExpressionList() :
|
|
{}
|
|
{
|
|
StatementExpression() ( "," StatementExpression() )*
|
|
}
|
|
|
|
void ForUpdate() :
|
|
{}
|
|
{
|
|
StatementExpressionList()
|
|
}
|
|
|
|
void BreakStatement() :
|
|
{Token t;}
|
|
{
|
|
"break" [ t=<IDENTIFIER> {jjtThis.setImage(t.image);} ] ";"
|
|
}
|
|
|
|
void ContinueStatement() :
|
|
{Token t;}
|
|
{
|
|
"continue" [ t=<IDENTIFIER> {jjtThis.setImage(t.image);} ] ";"
|
|
}
|
|
|
|
void ReturnStatement() :
|
|
{}
|
|
{
|
|
"return" [ Expression() ] ";"
|
|
}
|
|
|
|
void ThrowStatement() :
|
|
{}
|
|
{
|
|
"throw" Expression() ";"
|
|
}
|
|
|
|
void SynchronizedStatement() :
|
|
{}
|
|
{
|
|
"synchronized" "(" Expression() ")" Block()
|
|
}
|
|
|
|
void TryStatement() :
|
|
/*
|
|
* Semantic check required here to make sure that at least one
|
|
* resource/finally/catch is present.
|
|
*/
|
|
{}
|
|
{
|
|
"try" (ResourceSpecification())? Block()
|
|
( CatchStatement() )*
|
|
[ FinallyStatement() ]
|
|
}
|
|
|
|
void ResourceSpecification() :
|
|
{}
|
|
{
|
|
{checkForBadTryWithResourcesUsage();}
|
|
"("
|
|
Resources()
|
|
(LOOKAHEAD(2) ";")?
|
|
")"
|
|
}
|
|
|
|
void Resources() :
|
|
{}
|
|
{
|
|
Resource() (LOOKAHEAD(2) ";" Resource())*
|
|
}
|
|
|
|
void Resource() :
|
|
{}
|
|
{
|
|
LOOKAHEAD("this" | Name() (")" | ";")) (
|
|
{checkForBadConciseTryWithResourcesUsage();}
|
|
Name()
|
|
// replaced with Expression in PMD 7, do the bare minimum
|
|
| "this" "." Name() // possible pmd6 improvement: add a isThisModifier() or so
|
|
)
|
|
| ( "final" {jjtThis.setFinal(true);} | Annotation() )*
|
|
LocalVariableType() VariableDeclaratorId() "=" Expression()
|
|
|
|
}
|
|
|
|
void CatchStatement() :
|
|
{}
|
|
{
|
|
"catch"
|
|
"(" FormalParameter() ")"
|
|
Block()
|
|
}
|
|
|
|
void FinallyStatement() :
|
|
{}
|
|
{
|
|
"finally" Block()
|
|
}
|
|
|
|
void AssertStatement() :
|
|
{
|
|
if (jdkVersion <= 3) {
|
|
throw new ParseException("Can't use 'assert' as a keyword when running in JDK 1.3 mode!");
|
|
}
|
|
}
|
|
{
|
|
<IDENTIFIER> Expression() [ ":" Expression() ] ";"
|
|
}
|
|
|
|
/* We use productions to match >>>, >> and > so that we can keep the
|
|
* type declaration syntax with generics clean
|
|
*/
|
|
|
|
void RUNSIGNEDSHIFT(): // TODO 7.0.0 make #void
|
|
{}
|
|
{
|
|
( LOOKAHEAD({ getToken(1).kind == GT &&
|
|
((Token.GTToken)getToken(1)).realKind == RUNSIGNEDSHIFT} )
|
|
">" ">" ">"
|
|
)
|
|
}
|
|
|
|
void RSIGNEDSHIFT(): // TODO 7.0.0 make #void
|
|
{}
|
|
{
|
|
( LOOKAHEAD({ getToken(1).kind == GT &&
|
|
((Token.GTToken)getToken(1)).realKind == RSIGNEDSHIFT} )
|
|
">" ">"
|
|
)
|
|
}
|
|
|
|
/* Annotation syntax follows. */
|
|
|
|
void Annotation():
|
|
{}
|
|
{
|
|
LOOKAHEAD( "@" Name() "(" ( <IDENTIFIER> "=" | ")" ))
|
|
NormalAnnotation()
|
|
|
|
|
LOOKAHEAD( "@" Name() "(" )
|
|
SingleMemberAnnotation()
|
|
|
|
|
MarkerAnnotation()
|
|
}
|
|
|
|
void NormalAnnotation():
|
|
{}
|
|
{
|
|
"@" Name() "(" [ MemberValuePairs() ] ")" {checkForBadAnnotationUsage();}
|
|
}
|
|
|
|
void MarkerAnnotation():
|
|
{}
|
|
{
|
|
"@" Name() {checkForBadAnnotationUsage();}
|
|
}
|
|
|
|
void SingleMemberAnnotation():
|
|
{}
|
|
{
|
|
"@" Name() "(" MemberValue() ")" {checkForBadAnnotationUsage();}
|
|
}
|
|
|
|
void MemberValuePairs():
|
|
{}
|
|
{
|
|
MemberValuePair() ( "," MemberValuePair() )*
|
|
}
|
|
|
|
void MemberValuePair():
|
|
{Token t;}
|
|
{
|
|
t=<IDENTIFIER> { jjtThis.setImage(t.image); } "=" MemberValue()
|
|
}
|
|
|
|
void MemberValue():
|
|
{}
|
|
{
|
|
Annotation()
|
|
|
|
|
MemberValueArrayInitializer()
|
|
|
|
|
ConditionalExpression()
|
|
}
|
|
|
|
void MemberValueArrayInitializer():
|
|
{}
|
|
{
|
|
"{" (MemberValue() ( LOOKAHEAD(2) "," MemberValue() )*)? [ "," ] "}"
|
|
}
|
|
|
|
/*
|
|
* We use that ghost production to factorise the check for JDK >= 1.8.
|
|
*/
|
|
void TypeAnnotation() #void:
|
|
{}
|
|
{
|
|
Annotation() {checkForBadTypeAnnotations();}
|
|
}
|
|
|
|
|
|
/* Annotation Types. */
|
|
|
|
void AnnotationTypeDeclaration(int modifiers):
|
|
{
|
|
Token t;
|
|
jjtThis.setModifiers(modifiers);
|
|
}
|
|
{
|
|
"@" "interface" t=<IDENTIFIER>
|
|
{
|
|
checkForBadAnnotationUsage();
|
|
checkForBadTypeIdentifierUsage(t.image);
|
|
jjtThis.setImage(t.image);
|
|
}
|
|
AnnotationTypeBody()
|
|
}
|
|
|
|
void AnnotationTypeBody():
|
|
{}
|
|
{
|
|
"{" ( AnnotationTypeMemberDeclaration() )* "}"
|
|
}
|
|
|
|
void AnnotationTypeMemberDeclaration():
|
|
{
|
|
int modifiers;
|
|
}
|
|
{
|
|
modifiers = Modifiers()
|
|
(
|
|
LOOKAHEAD(Type() <IDENTIFIER> "(") AnnotationMethodDeclaration(modifiers)
|
|
|
|
|
ClassOrInterfaceDeclaration(modifiers)
|
|
|
|
|
LOOKAHEAD(3) EnumDeclaration(modifiers)
|
|
|
|
|
AnnotationTypeDeclaration(modifiers)
|
|
|
|
|
FieldDeclaration(modifiers)
|
|
)
|
|
|
|
|
( ";" )
|
|
}
|
|
|
|
void AnnotationMethodDeclaration(int modifiers):
|
|
{
|
|
Token t;
|
|
jjtThis.setModifiers(modifiers);
|
|
}
|
|
{
|
|
Type() t=<IDENTIFIER> "(" ")" [ DefaultValue() ] ";"
|
|
{
|
|
jjtThis.setImage(t.image);
|
|
}
|
|
}
|
|
|
|
void DefaultValue():
|
|
{}
|
|
{
|
|
"default" MemberValue()
|
|
}
|
|
|
|
void ModuleDeclaration():
|
|
{
|
|
StringBuilder s = new StringBuilder();
|
|
Token t;
|
|
checkForBadModuleUsage();
|
|
}
|
|
{
|
|
( Annotation() )* [LOOKAHEAD({isKeyword("open")}) <IDENTIFIER> {jjtThis.setOpen(true);}] LOOKAHEAD({isKeyword("module")}) <IDENTIFIER>
|
|
t=<IDENTIFIER> { s.append(t.image); }
|
|
( "." t=<IDENTIFIER> { s.append('.').append(t.image); } )* { jjtThis.setImage(s.toString()); }
|
|
"{" (ModuleDirective())* "}"
|
|
}
|
|
|
|
void ModuleDirective():
|
|
{}
|
|
{
|
|
( LOOKAHEAD({isKeyword("requires")}) <IDENTIFIER> { jjtThis.setType(ASTModuleDirective.DirectiveType.REQUIRES); }
|
|
(LOOKAHEAD({isKeyword("transitive")}) <IDENTIFIER> { jjtThis.setRequiresModifier(ASTModuleDirective.RequiresModifier.TRANSITIVE); } |
|
|
"static" { jjtThis.setRequiresModifier(ASTModuleDirective.RequiresModifier.STATIC); } )?
|
|
ModuleName() ";" )
|
|
| ( LOOKAHEAD({isKeyword("exports")}) <IDENTIFIER> { jjtThis.setType(ASTModuleDirective.DirectiveType.EXPORTS); } Name() [ LOOKAHEAD({isKeyword("to")}) <IDENTIFIER> ModuleName() ("," ModuleName())*] ";" )
|
|
| ( LOOKAHEAD({isKeyword("opens")}) <IDENTIFIER> { jjtThis.setType(ASTModuleDirective.DirectiveType.OPENS); } Name() [ LOOKAHEAD({isKeyword("to")}) <IDENTIFIER> ModuleName() ("," ModuleName())*] ";" )
|
|
| ( LOOKAHEAD({isKeyword("uses")}) <IDENTIFIER> { jjtThis.setType(ASTModuleDirective.DirectiveType.USES); } Name() ";" )
|
|
| ( LOOKAHEAD({isKeyword("provides")}) <IDENTIFIER> { jjtThis.setType(ASTModuleDirective.DirectiveType.PROVIDES); } Name() LOOKAHEAD({isKeyword("with")}) <IDENTIFIER> Name() ("," Name() )* ";" )
|
|
}
|
|
|
|
// Similar to Name()
|
|
void ModuleName():
|
|
{
|
|
StringBuilder s = new StringBuilder();
|
|
Token t;
|
|
}
|
|
{
|
|
t=<IDENTIFIER> { s.append(t.image); }
|
|
( "." t=<IDENTIFIER> {s.append('.').append(t.image);} )*
|
|
{jjtThis.setImage(s.toString());}
|
|
}
|