PGI 19 doesn't support UDL Templates

[n16h7hunt3r]

While compiling in an an other project i got this error message

"fmt/bundled/format.h", line 3455:
          error: a literal operator template must have a template parameter
          list equivalent to "<char ...>"
  FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() {
                                                        ^

1 error detected in the compilation of "/host_pwd/src/adaption/Adaption.cpp".

using

-- Using PGI 19.10.0
-- Release flags:  -std=c++17 -Mnollvm -std=c++17 ,  -fast -O3 -DNDEBUG -O3 -fast -w -DNDEBUG
-- 
-- Platform: 
--     Host: Linux4.9.232x86_64
--     CMake: 3.10.2
--     CMake generator: Unix Makefiles
--     CMake build tool: /usr/bin/make
--     Configuration: Release

can be fixed by setting # define FMT_UDL_TEMPLATE 0 if you are using PGI

[vitaut]

Could you submit a PR disabling FMT_UDL_TEMPLATE for PGI in

fmt/include/fmt/format.h

Lines 144 to 151 in 54daa08

	# if FMT_USE_USER_DEFINED_LITERALS && \
	(!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 501) && \
	((FMT_GCC_VERSION >= 604 && __cplusplus >= 201402L) || \
	FMT_CLANG_VERSION >= 304)
	# define FMT_USE_UDL_TEMPLATE 1
	# else
	# define FMT_USE_UDL_TEMPLATE 0
	# endif

since you are in the best position to test the change?