48 lines
961 B
Plaintext
48 lines
961 B
Plaintext
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class ActionDispatch::Journey::Parser
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token SLASH LITERAL SYMBOL LPAREN RPAREN DOT STAR OR
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rule
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expressions
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: expressions expression { result = Cat.new(val.first, val.last) }
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| expression { result = val.first }
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| or
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;
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expression
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: terminal
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| group
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| star
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;
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group
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: LPAREN expressions RPAREN { result = Group.new(val[1]) }
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;
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or
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: expressions OR expression { result = Or.new([val.first, val.last]) }
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;
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star
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: STAR { result = Star.new(Symbol.new(val.last)) }
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;
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terminal
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: symbol
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| literal
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| slash
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| dot
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;
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slash
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: SLASH { result = Slash.new('/') }
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;
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symbol
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: SYMBOL { result = Symbol.new(val.first) }
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;
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literal
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: LITERAL { result = Literal.new(val.first) }
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dot
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: DOT { result = Dot.new(val.first) }
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;
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end
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---- header
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require 'action_dispatch/journey/parser_extras'
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