Portabiluty: use `Exception new signal: message` to throw exceptions
...instead of #signalWith: It seems that this is the only portable way
to throw exceptions (at least among Pharo and Smalltalk/X)
"{ Package: 'stx:goodies/petitparser/compiler' }"
"{ NameSpace: Smalltalk }"
Error subclass:#PPCCompilationError
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'PetitCompiler-Exceptions'
!
!PPCCompilationError class methodsFor:'error signalling'!
signalWith: message
^ self signal: message
! !
!PPCCompilationError class methodsFor:'documentation'!
version_HG
^ '$Changeset: <not expanded> $'
! !