// ECMA-262 12.3 Left-Hand-Side Expressions
public Node parseLeftHandSideExpression()
{
Node quasi;
Node expr;
Node property;
Token startToken;
assert(state.allowIn, "callee of new expression always allow in keyword.");
startToken = lookahead;
if (matchKeyword("super") && state.inFunctionBody)
{
expr = new Node();
lex();
expr = expr.finishSuper();
if (!match("[") && !match("."))
{
throwUnexpectedToken(lookahead);
}
}
else
{
expr = inheritCoverGrammar(() =>
{
if (matchKeyword("new")) return parseNewExpression();
return parsePrimaryExpression();
});
}
for (; ; )
{
if (match("["))
{
isBindingElement = false;
isAssignmentTarget = true;
property = parseComputedMember();
expr = new Node(startToken).finishMemberExpression("[", expr, property);
}
else if (match("."))
{
isBindingElement = false;
isAssignmentTarget = true;
property = parseNonComputedMember();
expr = new Node(startToken).finishMemberExpression(".", expr, property);
}
else if (lookahead.type == TokenType.Template && lookahead.head)
{
quasi = parseTemplateLiteral();
expr = new Node(startToken).finishTaggedTemplateExpression(expr, quasi);
}
else
{
break;
}
}
return expr;
}
// ECMA-262 12.3.4 Function Calls
public Node parseLeftHandSideExpressionAllowCall()
{
Node quasi;
Node expr;
List<Node> args;
Node property;
Token startToken;
bool previousAllowIn = state.allowIn;
startToken = lookahead;
state.allowIn = true;
if (matchKeyword("super") && state.inFunctionBody)
{
expr = new Node();
lex();
expr = expr.finishSuper();
if (!match("(") && !match(".") && !match("["))
{
throwUnexpectedToken(lookahead);
}
}
else
{
expr = inheritCoverGrammar(() =>
{
if (matchKeyword("new"))
return parseNewExpression();
return parsePrimaryExpression();
});
}
for (; ; )
{
if (match("."))
{
isBindingElement = false;
isAssignmentTarget = true;
property = parseNonComputedMember();
expr = new Node(startToken).finishMemberExpression(".", expr, property);
}
else if (match("("))
{
isBindingElement = false;
isAssignmentTarget = false;
args = parseArguments();
expr = new Node(startToken).finishCallExpression(expr, args);
}
else if (match("["))
{
isBindingElement = false;
isAssignmentTarget = true;
property = parseComputedMember();
expr = new Node(startToken).finishMemberExpression("[", expr, property);
}
else if (lookahead.type == TokenType.Template && lookahead.head)
{
quasi = parseTemplateLiteral();
expr = new Node(startToken).finishTaggedTemplateExpression(expr, quasi);
}
else
{
break;
}
}
state.allowIn = previousAllowIn;
return expr;
}