code: public final void ruleXExpression() throws RecognitionException {
  
          		int stackSize = keepStackSize();
          	
          try {
              // InternalXbase.g:71:2: ( ( ruleXAssignment ) )
              // InternalXbase.g:72:2: ( ruleXAssignment )
              {
              // InternalXbase.g:72:2: ( ruleXAssignment )
              // InternalXbase.g:73:3: ruleXAssignment
              {
              if ( state.backtracking==0 ) {
                 before(grammarAccess.getXExpressionAccess().getXAssignmentParserRuleCall()); 
              }
              pushFollow(FOLLOW_2);
              ruleXAssignment();
  
              state._fsp--;
              if (state.failed) return ;
              if ( state.backtracking==0 ) {
                 after(grammarAccess.getXExpressionAccess().getXAssignmentParserRuleCall()); 
              }
  
              }
  
  
              }
  
          }
          catch (RecognitionException re) {
              reportError(re);
              recover(input,re);
          }
          finally {
  
              	restoreStackSize(stackSize);
  
          }
          return ;
      }
docs: InternalXbase.g:67:1: ruleXExpression : ( ruleXAssignment ) ;