zturner added a comment.

In https://reviews.llvm.org/D52461#1265335, @aleksandr.urakov wrote:

> Hello!
>
> I just have tried to patch `CPlusPlusNameParser` in the way to support MSVC 
> demangled names, but there is a problem. `CPlusPlusNameParser` splits an 
> incoming name in tokens with `clang::Lexer`. I've lexed the next name:
>
>   `anonymous namespace'::foo
>
>
> The lexer treats the first character (a grave accent) as an unknown token, 
> and it's ok for our purposes. Then it sees an identifier (`anonymous`), a 
> keyword (`namespace`), and it's ok too. But the problem is with the last part 
> of the string. The lexer sees an apostrophe and supposes that it's a 
> character constant, it looks for a closing apostrophe, don't find it and 
> treats all the line ending (`'::foo`) as a single unknown token.
>
> It is possible to somehow make `clang::Lexer` lex MSVC demangled names 
> correctly, but I'm not sure if it is the right place to do it. And it may 
> have then some side effects during lexing a real code.
>
> Another option is to somehow preprocess the name before lexing and replace 
> all //paired// apostrophes with grave accents, and after lexing replace with 
> apostrophes back, and make `CPlusPlusNameParser` understand unknown grave 
> accent tokens. But it's a bit tricky, may be you can suggest some better 
> solution?


Just handle the `anonymous namespace' thing specially before passing to 
`CPlusPlusNameParser`.


Repository:
  rLLDB LLDB

https://reviews.llvm.org/D52461



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