// 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();
Arg[] args = FinishArgListOrGenExpr();
CallExpression call;
if (args != null) {
call = FinishCallExpr(ret, args);
} else {
call = new CallExpression(ret, new Arg[0]);
}
call.SetLoc(_globalParent, ret.StartIndex, GetEnd());
ret = call;
break;
case TokenKind.LeftBracket:
NextToken();
Expression index = ParseSubscriptList();
IndexExpression ie = new IndexExpression(ret, index);
ie.SetLoc(_globalParent, ret.StartIndex, GetEnd());
ret = ie;
break;
case TokenKind.Dot:
NextToken();
string name = ReadNameMaybeNone();
MemberExpression fe = new MemberExpression(ret, name);
fe.SetLoc(_globalParent, ret.StartIndex, GetEnd());
ret = fe;
break;
case TokenKind.Constant:
// abc.1, abc"", abc 1L, abc 0j
ReportSyntaxError("invalid syntax");
return Error();
default:
return ret;
}
}
} finally {
_allowIncomplete = prevAllow;
}
}
// decorators ::=
// decorator+
// decorator ::=
// "@" dotted_name ["(" [argument_list [","]] ")"] NEWLINE
private List<Expression> ParseDecorators() {
List<Expression> decorators = new List<Expression>();
while (MaybeEat(TokenKind.At)) {
var start = GetStart();
Expression decorator = new NameExpression(ReadName());
decorator.SetLoc(_globalParent, start, GetEnd());
while (MaybeEat(TokenKind.Dot)) {
string name = ReadNameMaybeNone();
decorator = new MemberExpression(decorator, name);
decorator.SetLoc(_globalParent, GetStart(), GetEnd());
}
decorator.SetLoc(_globalParent, start, GetEnd());
if (MaybeEat(TokenKind.LeftParenthesis)) {
if (_sink != null) {
_sink.StartParameters(GetSourceSpan());
}
Arg[] args = FinishArgumentList(null);
decorator = FinishCallExpr(decorator, args);
}
decorator.SetLoc(_globalParent, start, GetEnd());
EatNewLine();
decorators.Add(decorator);
}
return decorators;
}
