// trailer: '(' [ arglist_genexpr ] ')' | '[' subscriptlist ']' | '.' NAME
private Expression AddTrailers(Expression ret)
{
while (true) {
Token t = PeekToken();
switch (t.Kind) {
case TokenKind.LeftParenthesis:
NextToken();
Arg[] args = FinishArgListOrGenExpr();
CallExpression call = FinishCallExpr(ret, args);
call.SetLoc(GetExternal(), ret.Start, GetEnd());
ret = call;
break;
case TokenKind.LeftBracket:
NextToken();
Expression index = ParseSubscriptList();
IndexExpression ie = new IndexExpression(ret, index);
ie.SetLoc(GetExternal(), ret.Start, GetEnd());
ret = ie;
break;
case TokenKind.Dot:
NextToken();
SymbolId name = ReadNameMaybeNone();
FieldExpression fe = new FieldExpression(ret, name);
fe.SetLoc(GetExternal(), ret.Start, GetEnd());
ret = fe;
break;
default:
return ret;
}
}
}
// decorators ::=
// decorator+
// decorator ::=
// "@" dotted_name ["(" [argument_list [","]] ")"] NEWLINE
private List<Expression> ParseDecorators()
{
List<Expression> decorators = new List<Expression>();
while (MaybeEat(TokenKind.At)) {
Location start = GetStart();
Expression decorator = new NameExpression(ReadName());
decorator.SetLoc(GetExternal(), start, GetEnd());
while (MaybeEat(TokenKind.Dot)) {
SymbolId name = ReadNameMaybeNone();
decorator = new FieldExpression(decorator, name);
decorator.SetLoc(GetExternal(), GetStart(), GetEnd());
}
decorator.SetLoc(GetExternal(), start, GetEnd());
if (MaybeEat(TokenKind.LeftParenthesis)) {
context.Sink.StartParameters(GetSpan());
Arg[] args = FinishArgumentList(null);
decorator = FinishCallExpr(decorator, args);
}
decorator.SetLoc(GetExternal(), start, GetEnd());
Eat(TokenKind.NewLine);
decorators.Add(decorator);
}
return decorators;
}
