Discussion :

[khaledrecherche]

Bonjour,

Je suis en train de développer une grammaire sous Xtext présentée ci-dessous:

Code :

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grammar org.xtext.System with org.eclipse.xtext.common.Terminals
 
generate system "http://www.xtext.org/System"
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
 
Acme:
    system+=SYSTEM*
  family+=FAMILY*;
SYSTEM :  'System '  name=ID '=' 
      Ouvert1=Ouverture
    (Comp+=Component)*
     (conn+=Connector)* 
 
    ferm1=Fermeture ;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Component: Component1|Component2|Component3;
Component1:name=ID ':' name1=CHAINE'=  new ' name3=CHAINE ';';
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Component2:
'Component' name=ID '='
   ouvert2=Ouverture
  (port+=Port)*
  (prop+=ProprietyC)
     ferm2=Fermeture;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%    
     Component3: name=ID ':' name1=CHAINE ;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Port: Port1|Port2;
Port1: name=CHAINE  
     ferm=Fermeture1 ;
Port2:
'Port' name=CHAINE '='
Ouvert3=Ouverture
ferm2=Fermeture;
//******************************************
ProprietyC:     Prop1|Prop2;
Prop1:name=ID;
Prop2: 'Properties' 
ouvertp=Ouverture
    (Pro+=Proprieties)*
 ferm1=Fermeture;
Proprieties:  name=ID ':' name1=ID '='  chaine=CHAINE ';' ; 
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Connector:  'Connector' name=ID '='
  Ouvert3=Ouverture
 (role+=Role)*
 PropC+=ProprietyC
ferm3=Fermeture
;    
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Role: Role1|Role2;
Role1: 'Roles' 
       ouvertR=Ouverture 
       name=CHAINE
       fermR=Fermeture;
Role2:
'Role' name=ID '='
     Ouvert4=Ouverture
    ferm4=Fermeture;
//%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
//************************************************Family******************
FAMILY:   'Family' name=ID  '= {'
             (componenttype+=ComponentType)*
             (connectortype+=ConnectorType)*
;
//**********************
ComponentType: 'Component Type'  identifier=CHAINE '= {'
     (portf+=Ports)*
       (propf+=Propertyf)*
'};' ;
//*****************ATTENTION à VERIFIER ***************************************
Ports:  'Ports {' 
name=CHAINE  '};'; 
//****************************************************
Propertyf:  Ide=CHAINE  ;
//**********************************************************
ConnectorType: 'Connector Type'  nn=CHAINE  '= {' 
'};';
//*********************************************************************
Ouverture: '{';
Fermeture: '}';
Fermeture1: ';';
//******************************************************************************
CHAINE : (ID|SL_COMMENT|'-'|'.'|STRING)* ;
A : (ID|SL_COMMENT|STRING)* ;

mais lors de l’exécution de cette grammaire j'obtiens les erreurs suivantes:

1 [main] INFO lipse.emf.mwe.utils.StandaloneSetup - Registering platform uri 'C:\Users\samsung\Desktop\newworkspace\eclipsehelio avec atl\workspace'
5999 [main] INFO ipse.emf.mwe.utils.DirectoryCleaner - Cleaning C:\Users\samsung\Desktop\newworkspace\eclipsehelio avec atl\workspace\org.xtext.System\..\org.xtext.System\src-gen
6461 [main] INFO ipse.emf.mwe.utils.DirectoryCleaner - Cleaning C:\Users\samsung\Desktop\newworkspace\eclipsehelio avec atl\workspace\org.xtext.System\..\org.xtext.System.ui\src-gen
7467 [main] INFO ipse.xtext.generator.LanguageConfig - generating infrastructure for org.xtext.System with fragments : ImplicitRuntimeFragment, ImplicitUiFragment, GrammarAccessFragment, EcoreGeneratorFragment, ParseTreeConstructorFragment, ResourceFactoryFragment, XtextAntlrGeneratorFragment, JavaValidatorFragment, ImportNamespacesScopingFragment, QualifiedNamesFragment, BuilderIntegrationFragment, FormatterFragment, LabelProviderFragment, TransformerFragment, OutlineNodeAdapterFactoryFragment, QuickOutlineFragment, QuickfixProviderFragment, JavaBasedContentAssistFragment, XtextAntlrUiGeneratorFragment
warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:1788:1: Decision can match input such as "{RULE_ID..RULE_STRING, '};', '-'..'.'}" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(201): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:1788:1: The following alternatives are unreachable: 2

warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:2100:1: Decision can match input such as "RULE_STRING" using multiple alternatives: 5, 6
As a result, alternative(s) 6 were disabled for that input
warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:2100:1: Decision can match input such as "'.'" using multiple alternatives: 4, 6
As a result, alternative(s) 6 were disabled for that input
warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:2100:1: Decision can match input such as "RULE_ID" using multiple alternatives: 1, 6
As a result, alternative(s) 6 were disabled for that input
warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:2100:1: Decision can match input such as "'-'" using multiple alternatives: 3, 6
As a result, alternative(s) 6 were disabled for that input
warning(200): ../org.xtext.System/src-gen/org/xtext/parser/antlr/internal/InternalSystem.g:2100:1: Decision can match input such as "RULE_SL_COMMENT" using multiple alternatives: 2, 6
As a result, alternative(s) 6 were disabled for that input
51107 [main] INFO or.validation.JavaValidatorFragment - executing generate for org.eclipse.xtext.generator.validation.JavaValidatorFragment
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:783:28: Decision can match input such as "RULE_STRING" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:783:28: Decision can match input such as "RULE_SL_COMMENT" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:783:28: Decision can match input such as "'.'" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:783:28: Decision can match input such as "RULE_ID" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:783:28: Decision can match input such as "'-'" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(200): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:3059:40: Decision can match input such as "{RULE_ID..RULE_STRING, '-'..'.', '};'}" using multiple alternatives: 1, 2
As a result, alternative(s) 2 were disabled for that input
warning(201): ../org.xtext.System.ui/src-gen/org/xtext/ui/contentassist/antlr/internal/InternalSystem.g:3059:40: The following alternatives are unreachable: 2

Quelqu'un saurait-il m'indiquer comment résoudre ce problème ?

Merci d'avance pour votre aide.

[miaous]

Bonjour,

Je pense que ton erreur vient du fait que ta grammaire est ambiguë:

Regarde ce tutoriel : http://alain-bernard.developpez.com/...aire-xtext/#LV