[C++-0x] User-defined literals.

[Ed Smith-Rowland]

Greetings,

I am slowly working on user defined literals for C++-0x.

This is my first foray into the C++ front end and I'm stuck.

Anyway, I managed to parse things like

   long double
   operator"" _foo(long double x) { return 2.0L * x; }

The result is a normal function that I can either call like
   operator "" _foo(1.2L);
or just
   _foo(1.2L);

The problem is when I parse something like

   u"string"w

I want to generate a call to something like

std::string operator"" w(const char16_t*, size_t);

i.e. I want to build a call:

w(u"string", 6);

I have a (not nearly ready for prime time) patch attached.  My current 
problem is in parser.c cp_parser_primary_expression after the string types.

Thanks for any help you can give,

Ed


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