https://llvm.org/bugs/show_bug.cgi?id=31624
Bug ID: 31624
Summary: static method invocation via objects are not
considered constexpr
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++14
Assignee: unassignedclangb...@nondot.org
Reporter: m...@godbolt.org
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Consider the following (unusual) code:
struct Foo { static constexpr bool hasBar() { return true; } };
void test(const Foo &f) {
static_assert(Foo::hasBar(), ""); // -is ok
static_assert(f.hasBar(), ""); // fails on clang trunk 291576, works in GCC
}
(also on https://godbolt.org/g/qwzYvc )
All clang versions I tested it on fail with "error: static_assert expression is
not an integral constant expression". GCC and CL both allow this and consider
the call to the static method hasBar via the actual object f to be constexpr.
It's not clear to me which behaviour is correct, though instinctively I'd
imagine it to be valid to allow such calls as constexpr.
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