private Expression ParseCallOrMemberTail(Expression ret)
{
while (true)
{
if (MaybeEat(TokenKind.LeftParenthesis))
{
List<Arg> arguments = new List<Arg>();
if (!MaybeEat(TokenKind.RightParenthesis))
{
do
{
arguments.Add(ParseArg());
} while (MaybeEat(TokenKind.Comma));
Eat(TokenKind.RightParenthesis);
}
ret = new CallExpression(ret, arguments.ToArray());
ret.SetLoc(_globalParent, ret.StartIndex, GetEnd());
}
else if (MaybeEat(TokenKind.Dot))
{
ret = new MemberExpression(ret, ((NameToken)NextToken()).Name);
ret.SetLoc(_globalParent, ret.StartIndex, GetEnd());
}
else if (MaybeEat(TokenKind.LeftBracket))
{
ret = new IndexExpression(ret, new[] { ParseExpression() }); // TODO: make possible with multiple indexes
ret.SetLoc(_globalParent, ret.StartIndex, GetEnd());
Eat(TokenKind.RightBracket);
}
else
return ret;
}
}
// member_expression: primary_expression ( ( '.' identifier ) | ( '[' expression ']' ) )*
private Expression ParseMemberExpression()
{
Expression ret = ParsePrimaryExpression();
if (ret == null)
return ret;
while (PeekToken().Kind == TokenKind.LeftBracket || PeekToken().Kind == TokenKind.Dot)
{
var start = ret.StartIndex;
if (MaybeEat(TokenKind.Dot))
{
ret = new MemberExpression(ret, ((NameToken)NextToken()).Name);
ret.SetLoc(_globalParent, start, GetEnd());
}
else if (Eat(TokenKind.LeftBracket))
{
ret = new IndexExpression(ret, new[] { ParseExpression() }); // TODO: make possible with multiple indexes
ret.SetLoc(_globalParent, start, GetEnd());
Eat(TokenKind.RightBracket);
}
}
return ret;
}