compiler/tests/extras/PPExpressionGrammar.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Thu, 21 May 2015 14:12:22 +0100
changeset 464 f6d77fee9811
permissions -rw-r--r--
Updated to PetitCompiler-JanKurs.118, PetitCompiler-Tests-JanKurs.46, PetitCompiler-Extras-Tests-JanKurs.11, and PetitCompiler-Benchmarks-JanKurs.11 Name: PetitCompiler-JanKurs.118 Author: JanKurs Time: 13-05-2015, 03:59:01.292 PM UUID: 4a8ccd94-3131-4cc7-9098-528f8e5ea0b5 Name: PetitCompiler-Tests-JanKurs.46 Author: JanKurs Time: 04-05-2015, 04:25:06.162 PM UUID: 9f4cf8b7-876e-4a13-9579-b833f016db66 Name: PetitCompiler-Extras-Tests-JanKurs.11 Author: JanKurs Time: 13-05-2015, 04:27:27.940 PM UUID: e9f30c31-fbd0-4e96-ad2a-868f88d20ea8 Name: PetitCompiler-Benchmarks-JanKurs.11 Author: JanKurs Time: 13-05-2015, 02:21:49.932 PM UUID: 6a23fd1e-a86f-46db-8221-cc41b778d32c

"{ Package: 'stx:goodies/petitparser/compiler/tests/extras' }"

"{ NameSpace: Smalltalk }"

PPCompositeParser subclass:#PPExpressionGrammar
	instanceVariableNames:'add prod term mul prim parens number'
	classVariableNames:''
	poolDictionaries:''
	category:'PetitCompiler-Extras-Tests-Expressions'
!

!PPExpressionGrammar methodsFor:'as yet unclassified'!

add
   ^ prod , $+ asParser trimmingToken , term
!

mul
   ^ prim , $* asParser trimmingToken , prod
!

number
   ^ #digit asParser plus trimmingToken ==> [ :token | token inputValue asNumber ]
!

parens
   ^ ($( asParser token trim), term , ($) asParser token trim)
!

prim
   ^ parens / number
!

prod
   ^ mul / prim
!

start
   ^ term end
!

term
   ^ add / prod
! !