Bug 21659 – [OSX] core.stdc.config.__c_ulonglong is forward referenced while looking for sizeof

Compiling the following with the latest (v2.095.1) on OSX: ``` import core.stdc.inttypes; import std.bitmanip; void main () { uint64_t record; auto x = nativeToLittleEndian(record)[0 .. typeof(record).sizeof]; } ``` Will trigger the following error: ``` /usr/local/opt/dmd/include/dlang/dmd/core/stdc/config.d(121): Error: enum core.stdc.config.__c_ulonglong is forward referenced when looking for sizeof /usr/local/opt/dmd/include/dlang/dmd/std/bitmanip.d(2958): Error: template instance std.bitmanip.EndianSwapper!(__c_ulonglong) error instantiating /usr/local/opt/dmd/include/dlang/dmd/std/bitmanip.d(3092): instantiated from here: nativeToEndianImpl!(false, __c_ulonglong) reg.d(7): instantiated from here: nativeToLittleEndian!(__c_ulonglong) /usr/local/opt/dmd/include/dlang/dmd/core/stdc/config.d(121): Error: enum core.stdc.config.__c_ulonglong is forward referenced when looking for sizeof /usr/local/opt/dmd/include/dlang/dmd/std/bitmanip.d(2966): Error: template instance std.bitmanip.ctfeBytes!(__c_ulonglong) error instantiating /usr/local/opt/dmd/include/dlang/dmd/std/bitmanip.d(3092): instantiated from here: nativeToEndianImpl!(false, __c_ulonglong) reg.d(7): instantiated from here: nativeToLittleEndian!(__c_ulonglong) ``` However, it will work fine on Linux. This error appeared also on Linux in an release (v2.078 to v2.080) but was fixed.

@Geod24 created dlang/dmd pull request #12225 "Fix 21659: Special enums are never forward referenced" fixing this issue: - Fix 21659: Special enums are never forward referenced The compiler always knows their property, so don't error out on special enums. https://github.com/dlang/dmd/pull/12225

dlang/dmd pull request #12225 "Fix 21659: Special enums are never forward referenced" was merged into master: - 86169b53a7a146a76c012a03f7a7f14a5fdcebb1 by Geod24: Fix 21659: Special enums are never forward referenced The compiler always knows their property, so don't error out on special enums. https://github.com/dlang/dmd/pull/12225