Examples of com.google.gwt.dev.jjs.ast.JPrefixOperation

com.google.gwt.dev.jjs.ast.JPrefixOperation
Java prefix operation expression.

     */
    private void simplifyBooleanEq(JExpression exp, boolean bool, Context ctx) {
      if (bool) {
        ctx.replaceMe(exp);
      } else {
        ctx.replaceMe(new JPrefixOperation(exp.getSourceInfo(),
            JUnaryOperator.NOT, exp));
      }
    }

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     * @return A simplified expression equivalent to <code>- exp</code>.
     */
    private JExpression simplifyNegate(JExpression original, JExpression exp) {
      // - -x -> x
      if (exp instanceof JPrefixOperation) {
        JPrefixOperation prefarg = (JPrefixOperation) exp;
        if (prefarg.getOp() == JUnaryOperator.NEG) {
          return prefarg.getArg();
        }
      }


      // no change
      if (original != null) {
        return original;
      }
      return new JPrefixOperation(exp.getSourceInfo(), JUnaryOperator.NEG, exp);
    }

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      return false;
    }


    private void simplifyXor(JExpression lhs, JBooleanLiteral rhs, Context ctx) {
      if (rhs.getValue()) {
        ctx.replaceMe(new JPrefixOperation(lhs.getSourceInfo(),
            JUnaryOperator.NOT, lhs));
      } else {
        ctx.replaceMe(lhs);
      }
    }

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        default:
          throw new InternalCompilerException("Unexpected prefix operator");
      }


      JPrefixOperation preOp = new JPrefixOperation(info, op,
          dispProcessExpression(x.lhs));
      return preOp;
    }

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        default:
          throw new InternalCompilerException(
              "Unexpected operator for unary expression");
      }


      JPrefixOperation preOp = new JPrefixOperation(info, op,
          dispProcessExpression(x.expression));
      return preOp;
    }

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            createVariableRef(info, indexVar), createVariableRef(info, maxVar));


        // ++i$index
        List<JExpressionStatement> increments = new ArrayList<JExpressionStatement>(
            1);
        increments.add(new JPrefixOperation(info, JUnaryOperator.INC,
            createVariableRef(info, indexVar)).makeStatement());


        // T elementVar = i$array[i$index];
        elementDecl.initializer = new JArrayRef(info, createVariableRef(info,
            arrayVar), createVariableRef(info, indexVar));

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              new JBinaryOperation(info, JPrimitiveType.BOOLEAN, JBinaryOperator.LT, new JLocalRef(
                  info, indexVar), new JLocalRef(info, maxVar));


          // ++i$index
          List<JExpressionStatement> increments = new ArrayList<JExpressionStatement>(1);
          increments.add(new JPrefixOperation(info, JUnaryOperator.INC, new JLocalRef(info,
              indexVar)).makeStatement());


          // T elementVar = i$array[i$index];
          elementDecl.initializer =
              new JArrayRef(info, new JLocalRef(info, arrayVar), new JLocalRef(info, indexVar));

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          default:
            throw new InternalCompilerException("Unexpected prefix operator");
        }


        JExpression lhs = pop(x.lhs);
        push(new JPrefixOperation(info, op, lhs));
      } catch (Throwable e) {
        throw translateException(x, e);
      }
    }

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          default:
            throw new InternalCompilerException("Unexpected operator for unary expression");
        }


        JExpression expression = pop(x.expression);
        push(new JPrefixOperation(info, op, expression));
      } catch (Throwable e) {
        throw translateException(x, e);
      }
    }

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    return false;
  }


  @Override
  public boolean visit(JPrefixOperation x, Context ctx) {
    expression = new JPrefixOperation(x.getSourceInfo(), x.getOp(),
        cloneExpression(x.getArg()));
    return false;
  }

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Related Classes of com.google.gwt.dev.jjs.ast.JPrefixOperation

com.google.gwt.dev.jjs.impl.AssertionNormalizer$AssertNormalizeVisitor

com.google.gwt.dev.jjs.impl.CloneExpressionVisitor

com.google.gwt.dev.jjs.impl.DeadCodeElimination$DeadCodeVisitor

com.google.gwt.dev.jjs.impl.GenerateJavaAST$JavaASTGenerationVisitor

com.google.gwt.dev.jjs.impl.GwtAstBuilder$AstVisitor

com.google.gwt.dev.jjs.impl.Simplifier

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