Re: How to seperate the C++ template implementation and definition in different files?

"Ben Voigt [C++ MVP]" <rbv@nospam.nospam>
Mon, 24 Nov 2008 08:21:12 -0600
Hendrik Schober wrote:

Ben Voigt [C++ MVP] wrote:

Triple-DES wrote:

On 14 Nov, 09:47, Hendrik Schober <> wrote:


(BTW, AFAIK, Dinkumware manages to enable 'export' in their
library for compilers that have it, and disable it for the
others. So the "exclusively" isn't necessary.)

Yes, I considered that possibility, but I felt that the introduction
of additional #define's for cross-compilation would make it less
straightforward than the header approach. It's a matter of opinion.
Of course, in a perfect world where every implementation was fully
conforming, header-only libraries would be less common.


header-only distribution of templates is the only way to be
compatible with multiple compilers

export is not binary-compatible across compilers, you'd need a
binary for each and every version of each and every toolchain you
wanted to support

 I suppose you mean this in a very general way (and not
 specific to templates) as I fail to see the differences
 to non-template code, where object code isn't compatible

Non-template code in a DLL + import library set is most definitely usable by
multiple compilers. And a DLL + LoadLibrary + GetProcAddress almost
universally so. At least in the Windows world, *nux has "shared object"
instead of DLL but pretty much the same rules apply -- if it's ELF format
and it's the right architecture, you can link to it from any compiler.


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