tests/PPArithmeticParser.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Fri, 24 Jul 2015 15:06:54 +0100
changeset 502 1e45d3c96ec5
parent 427 a7f5e6de19d2
permissions -rw-r--r--
Updated to PetitCompiler-JanVrany.135, PetitCompiler-Tests-JanKurs.93, PetitCompiler-Extras-Tests-JanVrany.16, PetitCompiler-Benchmarks-JanKurs.12 Name: PetitCompiler-JanVrany.135 Author: JanVrany Time: 22-07-2015, 06:53:29.127 PM UUID: 890178b5-275d-46af-a2ad-1738998f07cb Ancestors: PetitCompiler-JanVrany.134 Name: PetitCompiler-Tests-JanKurs.93 Author: JanKurs Time: 20-07-2015, 11:30:10.283 PM UUID: 6473e671-ad70-42ca-b6c3-654b78edc531 Ancestors: PetitCompiler-Tests-JanKurs.92 Name: PetitCompiler-Extras-Tests-JanVrany.16 Author: JanVrany Time: 22-07-2015, 05:18:22.387 PM UUID: 8f6f9129-dbba-49b1-9402-038470742f98 Ancestors: PetitCompiler-Extras-Tests-JanKurs.15 Name: PetitCompiler-Benchmarks-JanKurs.12 Author: JanKurs Time: 06-07-2015, 02:10:06.901 PM UUID: cb24f1ac-46a4-494d-9780-64576f0f0dba Ancestors: PetitCompiler-Benchmarks-JanKurs.11, PetitCompiler-Benchmarks-JanVrany.e29bd90f388e.20150619081300

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

"{ NameSpace: Smalltalk }"

PPCompositeParser subclass:#PPArithmeticParser
	instanceVariableNames:'terms addition factors multiplication power primary parentheses
		number'
	classVariableNames:''
	poolDictionaries:''
	category:'PetitTests-Examples'
!


!PPArithmeticParser methodsFor:'accessing'!

start
	^ terms end
! !

!PPArithmeticParser methodsFor:'grammar'!

addition
	^ (factors separatedBy: ($+ asParser / $- asParser) trim) 
		foldLeft: [ :a :op :b | a perform: op asSymbol with: b ]
!

factors
	^ multiplication / power
!

multiplication
	^ (power separatedBy: ($* asParser / $/ asParser) trim)
		foldLeft: [ :a :op :b | a perform: op asSymbol with: b ]
!

number
	^ ($- asParser optional , #digit asParser plus , ($. asParser , #digit asParser plus) optional) flatten trim 
		==> [ :value | value asNumber ]
!

parentheses
	^ $( asParser trim , terms , $) asParser trim
		==> [ :nodes | nodes at: 2 ]
!

power
	^ (primary separatedBy: $^ asParser trim)
		foldRight: [ :a :op :b | a raisedTo: b ]
!

primary
	^ number / parentheses
!

terms
	^ addition / factors
! !

!PPArithmeticParser class methodsFor:'documentation'!

version
    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
!

version_CVS
    ^ '$Header: /cvs/stx/stx/goodies/petitparser/PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
!

version_HG

    ^ '$Changeset: <not expanded> $'
!

version_SVN
    ^ '$Id: PPArithmeticParser.st,v 1.4 2014-03-04 14:33:59 cg Exp $'
! !