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module examples::untypedFun::Syntax

rascal-0.34.0
typepal-0.8.10

Usage​

import examples::untypedFun::Syntax;

Source code​

http://github.com/usethesource/typepal/src/examples/untypedFun/Syntax.rsc

Dependencies​

extend examples::CommonLex;

syntax Expression​

start syntax Expression 
   = 
     Id name
   | Integer intcon 
   | Boolean boolcon
   | String strcon
   | bracket "(" Expression e ")"                   
   > left ( Expression lhs "+" Expression rhs                                          
          | Expression lhs "&&" Expression rhs  
          )
   | "fun" Id arg "{" Expression exp "}"
   > left Expression exp1 "(" Expression exp2  ")"
   | "let" Id name "=" Expression exp1 "in" Expression exp2 "end"
   | "if" Expression cond "then" Expression thenPart "else" Expression elsePart "fi" 
   ;

syntax Reserved​

keyword Reserved 
    = "if" | "then" | "else" | "fi" | 
      "let" | "in" | "fun" | "end" |
      "int" | "bool"
    ;