Package com.google.gwt.dev.jjs.ast

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

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      // TODO(spoon): immediately simplify the resulting block
      return newBlock;
    }

    if (condExpr instanceof JBooleanLiteral) {
      JBooleanLiteral booleanLiteral = (JBooleanLiteral) condExpr;
      boolean boolVal = booleanLiteral.getValue();
      if (boolVal && !isEmpty(thenStmt)) {
        // If true, replace myself with then statement
        return thenStmt;
      } else if (!boolVal && !isEmpty(elseStmt)) {
        // If false, replace myself with else statement
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     */
    @Override
    public void endVisit(JDoStatement x, Context ctx) {
      JExpression expression = x.getTestExpr();
      if (expression instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) expression;

        // If false, replace do with do's body
        if (!booleanLiteral.getValue()) {
          // Unless it contains break/continue statements
          FindBreakContinueStatementsVisitor visitor = new FindBreakContinueStatementsVisitor();
          visitor.accept(x.getBody());
          if (!visitor.hasBreakContinueStatements()) {
            ctx.replaceMe(x.getBody());
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     */
    @Override
    public void endVisit(JForStatement x, Context ctx) {
      JExpression expression = x.getTestExpr();
      if (expression instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) expression;

        // If false, replace the for statement with its initializers
        if (!booleanLiteral.getValue()) {
          JBlock block = new JBlock(x.getSourceInfo());
          block.addStmts(x.getInitializers());
          ctx.replaceMe(block);
        }
      }
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     */
    @Override
    public void endVisit(JWhileStatement x, Context ctx) {
      JExpression expression = x.getTestExpr();
      if (expression instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) expression;

        // If false, prune the while statement
        if (!booleanLiteral.getValue()) {
          removeMe(x, ctx);
        }
      }
    }
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            return true;
          }
          return false;

        case NOT: {
          JBooleanLiteral booleanLit = (JBooleanLiteral) exp;
          ctx.replaceMe(program.getLiteralBoolean(!booleanLit.getValue()));
          return true;
        }

        default:
          return false;
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     * if (isWhatever() && false) -> if (false), unless side effects
     * </pre>
     */
    private void shortCircuitAnd(JExpression lhs, JExpression rhs, Context ctx) {
      if (lhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) lhs;
        if (booleanLiteral.getValue()) {
          ctx.replaceMe(rhs);
        } else {
          ctx.replaceMe(lhs);
        }

      } else if (rhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) rhs;
        if (booleanLiteral.getValue()) {
          ctx.replaceMe(lhs);
        } else if (!lhs.hasSideEffects()) {
          ctx.replaceMe(rhs);
        }
      }
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     * if (isWhatever() || true) -> if (true), unless side effects
     * </pre>
     */
    private void shortCircuitOr(JExpression lhs, JExpression rhs, Context ctx) {
      if (lhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) lhs;
        if (booleanLiteral.getValue()) {
          ctx.replaceMe(lhs);
        } else {
          ctx.replaceMe(rhs);
        }

      } else if (rhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) rhs;
        if (!booleanLiteral.getValue()) {
          ctx.replaceMe(lhs);
        } else if (!lhs.hasSideEffects()) {
          ctx.replaceMe(rhs);
        }
      }
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     * y ^ false    -> y
     * </pre>
     */
    private void simplifyXor(JExpression lhs, JExpression rhs, Context ctx) {
      if (lhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) lhs;
        simplifyXor(rhs, booleanLiteral, ctx);
      } else if (rhs instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) rhs;
        simplifyXor(lhs, booleanLiteral, ctx);
      }
    }
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     */
    @Override
    public void endVisit(JDoStatement x, Context ctx) {
      JExpression expression = x.getTestExpr();
      if (expression instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) expression;

        // If false, replace do with do's body
        if (!booleanLiteral.getValue()) {
          // Unless it contains break/continue statements
          FindBreakContinueStatementsVisitor visitor = new FindBreakContinueStatementsVisitor();
          visitor.accept(x.getBody());
          if (!visitor.hasBreakContinueStatements()) {
            ctx.replaceMe(x.getBody());
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     */
    @Override
    public void endVisit(JForStatement x, Context ctx) {
      JExpression expression = x.getTestExpr();
      if (expression instanceof JBooleanLiteral) {
        JBooleanLiteral booleanLiteral = (JBooleanLiteral) expression;

        // If false, replace the for statement with its initializers
        if (!booleanLiteral.getValue()) {
          JBlock block = new JBlock(x.getSourceInfo());
          block.addStmts(x.getInitializers());
          ctx.replaceMe(block);
        }
      }
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Related Classes of com.google.gwt.dev.jjs.ast.JBooleanLiteral

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