sepavloff added a comment.
Is it correct to emit error in this case?
According to the Standard 10.5p1 "All function types, function names with
external linkage, and variable names with external linkage have a language
linkage". So templates do not have a language linkage.
The next paragraph, which introduces inkage-specification, states: "The
string-literal indicates the required language linkage". So the construct
`extern "C"` specifies just language linkage, which is not pertinent to
templates.
In 10.5p4 there is an example of a class defined in extern "C" construct:
extern "C" {
class X {
void mf(); // the name of the function mf and the member function’s type
have
// C++ language linkage
void mf2(void(*)()); // the name of the function mf2 has C++ language
linkage;
// the parameter has type “pointer to C function”
};
}
Classes do not have language linkage according to 10.5p1, just as templates, so
this code is valid.
It looks like defining templates inside extern "C" blocks is OK.
https://reviews.llvm.org/D41179
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
