[cfe-dev] Tips on implementing n3972 (std::source_context)?

[Jim Porter]

I'm interested in implementing n3972[1] (std::source_context), but 
before I start delving too deep into it, I wanted to see if others had 
thought any about it. I do have some experience hacking on clang, but 
only in the parser (and it was years ago, anyway).

The paper suggests implementing std::source_context as a pointer to some 
implementation-defined static object to make copying faster. Since it's 
a literal type, I assume this means the static objects will have to be 
generated during compilation, but that's a part of clang I haven't look 
at at all.

There's also the question of getting the SourceLocation of the 
invocation, but that seems more tractable for me. Still, if anyone has 
ideas about how to implement this, I'd be happy to hear them.

- Jim

[1] http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3972.pdf