docs: public final void shiftExpression() throws RecognitionException {
  		int shiftExpression_StartIndex = input.index();
  
  		try {
  			if ( state.backtracking>0 && alreadyParsedRule(input, 120) ) { return; }
  
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1178:5: ( additiveExpression ( shiftOp additiveExpression )* )
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1178:9: additiveExpression ( shiftOp additiveExpression )*
  			{
  			pushFollow(FOLLOW_additiveExpression_in_shiftExpression5337);
  			additiveExpression();
  			state._fsp--;
  			if (state.failed) return;
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1178:28: ( shiftOp additiveExpression )*
  			loop152:
  			while (true) {
  				int alt152=2;
  				alt152 = dfa152.predict(input);
  				switch (alt152) {
  				case 1 :
  					// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:1178:30: shiftOp additiveExpression
  					{
  					pushFollow(FOLLOW_shiftOp_in_shiftExpression5341);
  					shiftOp();
  					state._fsp--;
  					if (state.failed) return;
  					pushFollow(FOLLOW_additiveExpression_in_shiftExpression5343);
  					additiveExpression();
  					state._fsp--;
  					if (state.failed) return;
  					}
  					break;
  
  				default :
  					break loop152;
  				}
  			}
  
  			}
  
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  		}
  		finally {
  			// do for sure before leaving
  			if ( state.backtracking>0 ) { memoize(input, 120, shiftExpression_StartIndex); }
  
  		}
  	}