Examples of com.google.gwt.dev.js.ast.JsExpression

com.google.gwt.dev.js.ast.JsExpression
An abstract base class for all JavaScript expressions.

        JsContext<JsStatement> ctx) {
      // $stackDepth = stackIndex - 1
      SourceInfo info = x.getSourceInfo().makeChild(JsStackEmulator.class,
          "Stack exit");


      JsExpression op = pop(info);


      if (ctx.canInsert()) {
        if (expr != null) {
          ctx.insertBefore(expr.makeStmt());
        }
        ctx.insertBefore(op.makeStmt());
      } else {
        JsBlock block = new JsBlock(info);
        if (expr != null) {
          block.getStatements().add(expr.makeStmt());
        }
        block.getStatements().add(op.makeStmt());
        block.getStatements().add(x);
        ctx.replaceMe(block);
      }
    }

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      SourceInfo info = x.getSourceInfo().makeChild(JsStackEmulator.class,
          "Stack entry code");


      JsNameRef stackRef = stack.makeRef(info);
      JsNameRef stackDepthRef = stackDepth.makeRef(info);
      JsExpression currentFunctionRef;
      if (currentFunction.getName() == null) {
        // Anonymous
        currentFunctionRef = program.getNullLiteral();
      } else {
        currentFunctionRef = currentFunction.getName().makeRef(info);

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      SourceInfo info = x.getSourceInfo().makeChild(JsStackEmulator.class,
          "Synthetic location data");


      // ($locations[stackIndex] = fileName + lineNumber, x)
      JsExpression location = program.getStringLiteral(info,
          String.valueOf(lastLine = info.getStartLine()));
      if (recordFileNames) {
        // 'fileName:' + lineNumber
        JsStringLiteral stringLit = program.getStringLiteral(info,
            baseName(lastFile = info.getFileName()) + ":");

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    return new StandardStatementRanges(statementStarts, statementEnds);
  }


  @Override
  public boolean visit(JsArrayAccess x, JsContext<JsExpression> ctx) {
    JsExpression arrayExpr = x.getArrayExpr();
    _parenPush(x, arrayExpr, false);
    accept(arrayExpr);
    _parenPop(x, arrayExpr, false);
    _lsquare();
    accept(x.getIndexExpr());

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  @Override
  public boolean visit(JsArrayLiteral x, JsContext<JsExpression> ctx) {
    _lsquare();
    boolean sep = false;
    for (Object element : x.getExpressions()) {
      JsExpression arg = (JsExpression) element;
      sep = _sepCommaOptSpace(sep);
      _parenPushIfCommaExpr(arg);
      accept(arg);
      _parenPopIfCommaExpr(arg);
    }

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  }


  @Override
  public boolean visit(JsBinaryOperation x, JsContext<JsExpression> ctx) {
    JsBinaryOperator op = x.getOperator();
    JsExpression arg1 = x.getArg1();
    _parenPush(x, arg1, !op.isLeftAssociative());
    accept(arg1);
    if (op.isKeyword()) {
      _parenPopOrSpace(x, arg1, !op.isLeftAssociative());
    } else {
      _parenPop(x, arg1, !op.isLeftAssociative());
      _spaceOpt();
    }
    p.print(op.getSymbol());
    JsExpression arg2 = x.getArg2();
    if (_spaceCalc(op, arg2)) {
      _parenPushOrSpace(x, arg2, op.isLeftAssociative());
    } else {
      _spaceOpt();
      _parenPush(x, arg2, op.isLeftAssociative());

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    _lparen();
    _nameDef(x.getParameter().getName());


    // Optional catch condition.
    //
    JsExpression catchCond = x.getCondition();
    if (catchCond != null) {
      _space();
      _if();
      _space();
      accept(catchCond);

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    // Associativity: for the then and else branches, it is safe to insert
    // another
    // ternary expression, but if the test expression is a ternary, it should
    // get parentheses around it.
    {
      JsExpression testExpression = x.getTestExpression();
      _parenPush(x, testExpression, true);
      accept(testExpression);
      _parenPop(x, testExpression, true);
    }
    _questionMark();
    {
      JsExpression thenExpression = x.getThenExpression();
      _parenPush(x, thenExpression, false);
      accept(thenExpression);
      _parenPop(x, thenExpression, false);
    }
    _colon();
    {
      JsExpression elseExpression = x.getElseExpression();
      _parenPush(x, elseExpression, false);
      accept(elseExpression);
      _parenPop(x, elseExpression, false);
    }
    return false;

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  public boolean visit(JsExprStmt x, JsContext<JsStatement> ctx) {
    boolean surroundWithParentheses = JsFirstExpressionVisitor.exec(x);
    if (surroundWithParentheses) {
      _lparen();
    }
    JsExpression expr = x.getExpression();
    accept(expr);
    if (surroundWithParentheses) {
      _rparen();
    }
    return false;

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    return false;
  }


  @Override
  public boolean visit(JsInvocation x, JsContext<JsExpression> ctx) {
    JsExpression qualifier = x.getQualifier();
    _parenPush(x, qualifier, false);
    accept(qualifier);
    _parenPop(x, qualifier, false);


    _lparen();
    boolean sep = false;
    for (Object element : x.getArguments()) {
      JsExpression arg = (JsExpression) element;
      sep = _sepCommaOptSpace(sep);
      _parenPushIfCommaExpr(arg);
      accept(arg);
      _parenPopIfCommaExpr(arg);
    }

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