[llvm-bugs] [Bug 23135] [C++11/14] Body of constexpr function templates instantiated too eagerly in unevaluated operands

[via llvm-bugs]

https://llvm.org/bugs/show_bug.cgi?id=23135

Richard Smith <richard-llvm at metafoo.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #5 from Richard Smith <richard-llvm at metafoo.co.uk> ---
Reopening: new thinking on core issue 1581 is that we would instantiate if a
constexpr function is used in a context that might be evaluated (note that this
is a broader set of contexts than "potentially-evaluated", and also includes
contexts where the evaluation would always be constant-evaluation, such as
evaluating a braced-init-list to check for narrowing, but does not include
evaluating an operand of 'decltype' in general).

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