Java 类org.mozilla.javascript.ast.ForLoop 实例源码

private Node transformForLoop(ForLoop loop) {
    decompiler.addToken(Token.FOR);
    decompiler.addToken(Token.LP);
    loop.setType(Token.LOOP);
    // XXX: Can't use pushScope/popScope here since 'createFor' may split
    // the scope
    Scope savedScope = currentScope;
    currentScope = loop;
    try {
        Node init = transform(loop.getInitializer());
        decompiler.addToken(Token.SEMI);
        Node test = transform(loop.getCondition());
        decompiler.addToken(Token.SEMI);
        Node incr = transform(loop.getIncrement());
        decompiler.addToken(Token.RP);
        decompiler.addEOL(Token.LC);
        Node body = transform(loop.getBody());
        decompiler.addEOL(Token.RC);
        return createFor(loop, init, test, incr, body);
    } finally {
        currentScope = savedScope;
    }
}

private Node transformForLoop(ForLoop loop) {
    decompiler.addToken(Token.FOR);
    decompiler.addToken(Token.LP);
    loop.setType(Token.LOOP);
    // XXX: Can't use pushScope/popScope here since 'createFor' may split
    // the scope
    Scope savedScope = currentScope;
    currentScope = loop;
    try {
        Node init = transform(loop.getInitializer());
        decompiler.addToken(Token.SEMI);
        Node test = transform(loop.getCondition());
        decompiler.addToken(Token.SEMI);
        Node incr = transform(loop.getIncrement());
        decompiler.addToken(Token.RP);
        decompiler.addEOL(Token.LC);
        Node body = transform(loop.getBody());
        decompiler.addEOL(Token.RC);
        return createFor(loop, init, test, incr, body);
    } finally {
        currentScope = savedScope;
    }
}

/**
 * generate constraints for a for-loop
 */
private void processForLoop(ForLoop loop) {
    AstNode initializer = loop.getInitializer();
    if (initializer instanceof Assignment){
        processAssignment((Assignment)initializer);
    }
    AstNode condition = loop.getCondition();
    processExpression(condition);
    AstNode incrementExp = loop.getIncrement();
    processExpression(incrementExp);
}

private void print(ForLoop node) throws IOException {
    writer.append("for").ws().append('(');
    print(node.getInitializer());
    writer.append(';');
    print(node.getCondition());
    writer.append(';');
    print(node.getIncrement());
    writer.append(')').ws();
    print(node.getBody());
}

/**
 * This method generates constraints for all relevant AstNodes. It delegates its work to various
 * processXXX() methods that handle AstNodes of type XXX.
 */
@Override
public boolean visit(AstNode node) {
    if (node instanceof VariableInitializer){
        processVariableInitializer(node);
    } else if (node instanceof ReturnStatement){
        processReturnStatement((ReturnStatement)node);
    } else if (node instanceof ExpressionStatement){
        processExpressionStatement((ExpressionStatement)node);
    } else if (node instanceof ForLoop){
        processForLoop((ForLoop)node);
    } else if (node instanceof ForInLoop){
        processForInLoop((ForInLoop)node);
    }else if (node instanceof WhileLoop){
        processWhileLoop((WhileLoop)node);
    } else if (node instanceof DoLoop){
        processDoLoop((DoLoop)node);
    } else if (node instanceof NewExpression){
        processNewExpression((NewExpression)node);
    } else if (node instanceof FunctionCall){
        processFunctionCall((FunctionCall)node);
    } else if (node instanceof ElementGet){
        processElementGet((ElementGet)node);
    } else if (node instanceof FunctionNode){
        processFunctionNode((FunctionNode)node);
    } else if (node instanceof IfStatement){
        processIfStatement((IfStatement)node);
    } else if (node instanceof KeywordLiteral){
        processKeywordLiteral((KeywordLiteral)node);
    } else if (node instanceof SwitchStatement){
        processSwitchStatement((SwitchStatement)node);
    } else if (node instanceof SwitchCase){
        processSwitchCase((SwitchCase)node);
    } else if ((node instanceof AstRoot) || //AstRoot: no constraints need to be generated
        (node instanceof BreakStatement) || //BreakStatement: no constraints need to be generated
        (node instanceof VariableDeclaration) || //VariableDeclaration: we generate constraints for its constituent VariableInitializer nodes
        (node instanceof Name) || //Name: generate constraints for complex expressions that refer to names
        (node instanceof NumberLiteral) || //NumberLiteral: generate constraints for complex expressions that refer to names
        (node instanceof StringLiteral) || //StringLiteral: generate constraints for complex expressions that refer to names
        (node instanceof Assignment) || // Assignment is a special case of InfixExpression
        (node instanceof ArrayLiteral) ||
        (node instanceof UnaryExpression) ||
        (node instanceof InfixExpression) ||
        (node instanceof ConditionalExpression) ||
        (node instanceof ParenthesizedExpression) ||
        (node instanceof EmptyExpression) ||
        (node instanceof ObjectLiteral) ||
        (node instanceof EmptyStatement) ||
        (node instanceof ContinueStatement) ||
        (node instanceof Scope) ||
        (node instanceof Block)){ // // occurs in programs with for loops -- nothing to be done here?
        /* nothing */
    } else {
        error("unsupported node " + node.toSource().trim() + " of type: " + node.getClass().getName(), node);
    }
    return true;
}