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module examples::struct::Syntax

rascal-0.40.16
typepal-0.14.8

Usage​

import examples::struct::Syntax;

Source code​

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

Dependencies​

extend examples::CommonLex;

syntax Program​

start syntax Program = Declaration*;

syntax Type​

syntax Type = "int" | "str" | Id typ;

syntax Declaration​

syntax Declaration
    = Type typ Id id "=" Expression exp ";"
    | "struct" Id name "{" {Field ","}* fields "}" ";"
    ;

syntax Field​

syntax Field = Type typ Id name ;

syntax Expression​

syntax Expression 
    = Integer i
    | String s
    | Id use
    | Expression lhs "." Id fieldName
    | "new" Id name
    ;

syntax Keywords​

keyword Keywords = "int" | "str" | "struct" | "new";