On 1 March 2011 00:25, Ian Lance Taylor wrote: > "Kevin P. Fleming" <kpfleming@xxxxxxxxxx> writes: > >> I would like to come up with some construction like the 'extern >> inline' that GCC supports for C mode, so that a.h could contain the >> declaration *and* definition of 'bar', allowing code that includes a.h >> to have 'bar' be inlined if the compiler chooses to do so (and leave >> an external reference to 'bar' if necessary so that the version built >> from a.cpp will be used). So far my attempts have only resulted in >> various re-definition or re-declaration errors. > > There is no equivalent to GNU C's "extern inline" in C++. By the way, > "extern inline" is now actually known as __attribute__ ((gnu_inline)), > as C99 defines "extern inline" to mean something different. > > In C++ you can simply define the function inline in a.h, and not define > it at all in a.cpp. The right thing will happen. That will work in practice, but it's technically an ODR violation.
