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[Bug c++/79452] Provide builtin to detect compile-time execution
- From: "eric at efcs dot ca" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sun, 12 Feb 2017 00:12:39 +0000
- Subject: [Bug c++/79452] Provide builtin to detect compile-time execution
- Auto-submitted: auto-generated
- References: <bug-79452-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79452
--- Comment #9 from Eric Fiselier <eric at efcs dot ca> ---
I think it would be nice to be able to dispatch differently depending on being
called at compile time or runtime. However the ability to dispatch on that
condition doesn't have to be usable in "if constexpr". That way we don't run
into any instantiation problems.
If that behavior is desireable enough I think it could be simply implemented as
an invented __ctfe__ function local variable that changes value.