feat:增强函数系统，实现大量的函数

condition/condition.go

@@ -0,0 +1,30 @@
+package condition
+
+import (
+	"github.com/expr-lang/expr"
+	"github.com/expr-lang/expr/vm"
+)
+
+type Condition interface {
+	Evaluate(env interface{}) bool
+}
+
+type ExprCondition struct {
+	program *vm.Program
+}
+
+func NewExprCondition(expression string) (Condition, error) {
+	program, err := expr.Compile(expression)
+	if err != nil {
+		return nil, err
+	}
+	return &ExprCondition{program: program}, nil
+}
+
+func (ec *ExprCondition) Evaluate(env interface{}) bool {
+	result, err := expr.Run(ec.program, env)
+	if err != nil {
+		return false
+	}
+	return result.(bool)
+}