https://bugs.llvm.org/show_bug.cgi?id=40549
Bug ID: 40549
Summary: ClangCL can't use UDL with /std:c++latest
Product: clang
Version: trunk
Hardware: PC
OS: Windows NT
Status: NEW
Severity: enhancement
Priority: P
Component: Driver
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
This occurs while trying to implement a user-defined literal. Attempting to
compile code without char8_t and with
A a2 = u8"\u4F60\u597D"_sv;
results in
u8.cpp(24,28): error: no matching literal operator for call to 'operator""_sv'
with arguments of types
'const char8_t *' and 'unsigned long long', and no matching literal
operator template
A a2 = u8"\u4F60\u597D"_sv;
Trying to add an overload with char8_t results in:
u8.cpp(10,1): error: cannot mangle this built-in char8_t type yet
A operator "" _sv(const char8_t* str, INT len)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
So, currently UDL can't be used with /std:c++latest
struct A
{
A() {}
};
#define INT unsigned long long
#ifdef TRY_U8
A operator "" _sv(const char8_t* str, INT len)
{
return A{};
}
#endif
A operator "" _sv(const char* str, INT len)
{
return A{};
}
int main()
{
A a1 = "hello"_sv;
#ifdef TRY_U8
A a2 = u8"\u4F60\u597D"_sv;
#endif
}
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