// 13 Statements
public Node parseStatement()
{
var type = lookahead.type;
Node expr = null;
List<Node> labeledBody;
string key;
Node node;
if (type == TokenType.EOF)
{
throwUnexpectedToken(lookahead);
}
if (type == TokenType.Punctuator && lookahead.value == "{")
{
return parseBlock();
}
isAssignmentTarget = isBindingElement = true;
node = new Node();
if (type == TokenType.Punctuator)
{
switch (lookahead.value)
{
case ";":
return parseEmptyStatement(node);
case "(":
return parseExpressionStatement(node);
default:
break;
}
}
else if (type == TokenType.Keyword)
{
switch (lookahead.value)
{
case "break":
return parseBreakStatement(node);
case "continue":
return parseContinueStatement(node);
case "debugger":
return parseDebuggerStatement(node);
case "do":
return parseDoWhileStatement(node);
case "for":
return parseForStatement(node);
case "function":
return parseFunctionDeclaration(node);
case "if":
return parseIfStatement(node);
case "return":
return parseReturnStatement(node);
case "switch":
return parseSwitchStatement(node);
case "throw":
return parseThrowStatement(node);
case "try":
return parseTryStatement(node);
case "var":
return parseVariableStatement(node);
case "while":
return parseWhileStatement(node);
case "with":
return parseWithStatement(node);
default:
break;
}
}
expr = parseExpression();
// ECMA-262 12.12 Labelled Statements
if ((expr.type == Syntax.Identifier) && match(":"))
{
lex();
key = "$" + expr.name;
//if (Object.prototype.hasOwnProperty.call(state.labelSet, key)) {
// throwError(Messages.Redeclaration, "Label", expr.name);
//}
state.labelSet.Add(key);// = true;
labeledBody = new List<Node>() { parseStatement() };
state.labelSet.Remove(key);
return node.finishLabeledStatement(expr, labeledBody);
}
consumeSemicolon();
return node.finishExpressionStatement(expr);
}
// ECMA-262 12.4 Expression Statement
public Node parseExpressionStatement(Node node)
{
var expr = parseExpression();
consumeSemicolon();
return node.finishExpressionStatement(expr);
}
