// trailer: '(' [ arglist_genexpr ] ')' | '[' subscriptlist ']' | '.' NAME
private Expression AddTrailers(Expression ret, bool allowGeneratorExpression)
{
bool prevAllow = _allowIncomplete;
try {
_allowIncomplete = true;
while (true) {
switch (PeekToken().Kind) {
case TokenKind.LeftParenthesis:
if (!allowGeneratorExpression) return ret;
NextToken();
string whitespace = _tokenWhiteSpace;
List<string> commaWhiteSpace;
bool ateTerminator;
Arg[] args = FinishArgListOrGenExpr(out commaWhiteSpace, out ateTerminator);
string closeParenWhiteSpace = _tokenWhiteSpace;
CallExpression call;
if (args != null) {
call = FinishCallExpr(ret, args);
} else {
call = new CallExpression(ret, new Arg[0]);
}
if (_verbatim) {
AddPreceedingWhiteSpace(call, whitespace);
AddSecondPreceedingWhiteSpace(call, closeParenWhiteSpace);
if (commaWhiteSpace != null) {
AddListWhiteSpace(call, commaWhiteSpace.ToArray());
}
if (!ateTerminator) {
AddErrorMissingCloseGrouping(call);
}
}
call.SetLoc(ret.StartIndex, GetEnd());
ret = call;
break;
case TokenKind.LeftBracket:
NextToken();
whitespace = _tokenWhiteSpace;
Expression index = ParseSubscriptList(out ateTerminator);
IndexExpression ie = new IndexExpression(ret, index);
string finishWhiteSpace = _tokenWhiteSpace;
ie.SetLoc(ret.StartIndex, GetEnd());
if (_verbatim) {
AddPreceedingWhiteSpace(ie, whitespace);
AddSecondPreceedingWhiteSpace(ie, finishWhiteSpace);
if (!ateTerminator) {
AddErrorMissingCloseGrouping(ie);
}
}
ret = ie;
break;
case TokenKind.Dot:
NextToken();
whitespace = _tokenWhiteSpace;
var name = ReadNameMaybeNone();
string nameWhitespace = _tokenWhiteSpace;
MemberExpression fe = MakeMember(ret, name);
fe.SetLoc(ret.StartIndex, GetStart(), GetEnd());
if (_verbatim) {
AddPreceedingWhiteSpace(fe, whitespace);
AddSecondPreceedingWhiteSpace(fe, nameWhitespace);
if (!name.HasName) {
AddErrorIsIncompleteNode(fe);
}
}
ret = fe;
break;
case TokenKind.Constant:
// abc.1, abc"", abc 1L, abc 0j
ReportSyntaxError("invalid syntax");
ret = Error(_verbatim ? _lookaheadWhiteSpace + _lookahead.Token.VerbatimImage : null, ret);
NextToken();
break;
default:
return ret;
}
}
} finally {
_allowIncomplete = prevAllow;
}
}
// IndexExpression
public override bool Walk(IndexExpression node)
{
return ShouldWalkWorker(node);
}
public override bool Walk(IndexExpression node)
{
node.Walk(_fc);
return false;
}
public override void PostWalk(IndexExpression node)
{
PostWalkWorker(node);
}
