docs: public final void primitiveType() throws RecognitionException {
  		int primitiveType_StartIndex = input.index();
  
  		try {
  			if ( state.backtracking>0 && alreadyParsedRule(input, 51) ) { return; }
  
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:537:5: ( 'boolean' | 'char' | 'byte' | 'short' | 'int' | 'long' | 'float' | 'double' )
  			// src/main/resources/org/drools/compiler/semantics/java/parser/Java.g:
  			{
  			if ( input.LA(1)==65||input.LA(1)==67||input.LA(1)==71||input.LA(1)==77||input.LA(1)==85||input.LA(1)==92||input.LA(1)==94||input.LA(1)==105 ) {
  				input.consume();
  				state.errorRecovery=false;
  				state.failed=false;
  			}
  			else {
  				if (state.backtracking>0) {state.failed=true; return;}
  				MismatchedSetException mse = new MismatchedSetException(null,input);
  				throw mse;
  			}
  			}
  
  		}
  		catch (RecognitionException re) {
  			reportError(re);
  			recover(input,re);
  		}
  		finally {
  			// do for sure before leaving
  			if ( state.backtracking>0 ) { memoize(input, 51, primitiveType_StartIndex); }
  
  		}
  	}