// ECMA-262 13.6 If statement
public Node parseIfStatement(Node node)
{
Node test;
Node consequent, alternate;
expectKeyword("if");
expect("(");
test = parseExpression();
expect(")");
consequent = parseStatement();
if (matchKeyword("else"))
{
lex();
alternate = parseStatement();
}
else
{
alternate = null;
}
return node.finishIfStatement(test, consequent, alternate);
}