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

com.google.gwt.dev.js.ast.JsStatement
Abstract base class for JavaScript statement objects.

      push(new JsLabel(names.get(x)));
    }


    @Override
    public void endVisit(JLabeledStatement x, Context ctx) {
      JsStatement body = (JsStatement) pop(); // body
      JsLabel label = (JsLabel) pop(); // label
      label.setStmt(body);
      push(label);
    }

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            jsSwitch.getCases().add(switchMember);
            curStatements = switchMember.getStmts();
          } else {
            // add to statements for current case
            assert (curStatements != null);
            JsStatement newStmt = (JsStatement) pop(); // stmt
            if (newStmt != null) {
              // Empty JDeclarationStatement produces a null
              curStatements.add(newStmt);
            }
          }

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    public boolean visit(JsBlock x, JsContext<JsStatement> ctx) {
      if (x == scopeStack.peek()) {
        ListIterator<JsStatement> itr = x.getStatements().listIterator();
        itrStack.push(itr);
        while (itr.hasNext()) {
          JsStatement stmt = itr.next();
          JsFunction func = isFunctionDecl(stmt);
          // Already at the top level.
          if (func != null) {
            dontMove.add(func);
          }

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       * Remove any dead statements after an abrupt change in code flow and
       * promote safe statements within nested blocks to this block.
       */
      List<JsStatement> stmts = x.getStatements();
      for (int i = 0; i < stmts.size(); i++) {
        JsStatement stmt = stmts.get(i);


        if (stmt instanceof JsBlock) {
          // Promote a sub-block's children to the current block.
          JsBlock block = (JsBlock) stmt;
          stmts.remove(i);
          stmts.addAll(i, block.getStatements());
          i--;
          didChange = true;
          continue;
        }


        if (stmt.unconditionalControlBreak()) {
          // Abrupt change in flow, chop the remaining items from this block
          for (int j = i + 1; j < stmts.size();) {
            JsStatement toRemove = stmts.get(j);
            JsStatement toReplace = ensureDeclarations(toRemove);
            if (toReplace == null) {
              stmts.remove(j);
              didChange = true;
            } else if (toReplace == toRemove) {
              ++j;

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          }
          if (x.getInitVars() != null) {
            block.getStatements().add(x.getInitVars());
          }
          block.getStatements().add(expr.makeStmt());
          JsStatement decls = ensureDeclarations(x.getBody());
          if (decls != null) {
            block.getStatements().add(decls);
          }
          ctx.replaceMe(accept(block));
        }

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    @Override
    public void endVisit(JsIf x, JsContext<JsStatement> ctx) {
      evalBooleanContext.remove(x.getIfExpr());


      JsExpression expr = x.getIfExpr();
      JsStatement thenStmt = x.getThenStmt();
      JsStatement elseStmt = x.getElseStmt();
      if (expr instanceof CanBooleanEval) {
        CanBooleanEval cond = (CanBooleanEval) expr;
        JsStatement onlyStmtToExecute;
        JsStatement removed;
        if (cond.isBooleanTrue()) {
          onlyStmtToExecute = thenStmt;
          removed = elseStmt;
        } else if (cond.isBooleanFalse()) {
          onlyStmtToExecute = elseStmt;
          removed = thenStmt;
        } else {
          return;
        }
        JsBlock block = new JsBlock();
        block.getStatements().add(expr.makeStmt());


        if (onlyStmtToExecute != null) {
          // We'll see this if the expression is always false and no else
          block.getStatements().add(onlyStmtToExecute);
        }


        JsStatement decls = ensureDeclarations(removed);
        if (decls != null) {
          block.getStatements().add(decls);
        }
        ctx.replaceMe(accept(block));
      } else if (isEmpty(thenStmt) && isEmpty(elseStmt)) {

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        // If false, replace with condition.
        if (cond.isBooleanFalse()) {
          JsBlock block = new JsBlock();
          block.getStatements().add(expr.makeStmt());
          JsStatement decls = ensureDeclarations(x.getBody());
          if (decls != null) {
            block.getStatements().add(decls);
          }
          ctx.replaceMe(accept(block));
        }

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    return false;
  }


  @Override
  public boolean visit(JsIf x, JsContext ctx) {
    JsStatement thenStmt = x.getThenStmt();
    JsStatement elseStmt = x.getElseStmt();
    JsStatement toCheck = thenStmt;
    if (elseStmt != null) {
      toCheck = elseStmt;
    }
    if (toCheck instanceof JsEmpty) {
      needsSemicolon = true;

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    stackDepthVar.setInitExpr(new JsNumberLiteral(info, (-1)));
    JsVar lineNumbersVar = new JsVar(info, lineNumbers);
    lineNumbersVar.setInitExpr(new JsArrayLiteral(info));


    JsVars vars;
    JsStatement first = jsProgram.getGlobalBlock().getStatements().get(0);
    if (first instanceof JsVars) {
      vars = (JsVars) first;
    } else {
      vars = new JsVars(info);
      jsProgram.getGlobalBlock().getStatements().add(0, vars);

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    _colon();
    _newlineOpt();


    indent();
    for (Object element : x.getStmts()) {
      JsStatement stmt = (JsStatement) element;
      needSemi = true;
      accept(stmt);
      if (needSemi) {
        _semi();
      }

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