The fill character can be any Unicode code point other than '{' or '}'. The presence of a fill character is signaled by the character following it, which must be one of the alignment options. If the second character of format_spec is not a valid alignment option, then it is assumed that both the fi...

Hi, I have two questions concerning formatting the time_point object with fmt: It seems that it cannot format time_point with Rep set to double, could this be improved? It seems that it incorrectly formats timepoint before Epoch, you can see negative sub-seconds number in the output. Compiler Expl...

Problem: when using hex output, it is currently not possible mixing capital hex letters with 0x just by using a format code. Example: https://godbolt.org/z/PxrY4sq36 fmt::format("{:#08x}", 3735928559) => 0xdeadbeef fmt::format("{:#08X}", 3735928559) => 0XDEADBEEF fmt::format("0x{:08X}", 37...

We now support template<typename It, typename Sentinel> auto fmt::join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> but sometimes we need transform the elements into a new style, before join. Could we support an api like template<typename It, typename Sentin...

I was using fmt 8.1.1, yesterday I tried to upgrade to 9.1.0, but the code won't compile. I've assembled a minimal example as below. The code compiles OK with fmt 8.1.1, but now failed with 9.1.0. System: Ubuntu 18.04.6 LTS (Bionic Beaver) Compiler: GCC 7.5 $ uname -a Linux elvis 5.4.0-126-generic #...

#include <fmt/core.h> #include <Windows.h> int main() { SetConsoleCP(CP_UTF8); fmt::print(fmt::fg(fmt::color::red2), "Don't panic!\n"); }

The code found here: https://fmt.dev/latest/api.html#argument-lists does not work as documented, there are no compile time checks, the following code compiles fine and produces a runtime error: https://godbolt.org/z/8oT34bhP1 My guess is that this is an error introduced with the switch from make_arg...

With msvc 17.3.4 i'm getting compilation errors with 9.1.0 and master (for char and wchar_t) but not with 9.0.0: error C7595: 'fmt::v9::basic_format_string<char,std::string &>::basic_format_string': call to immediate function is not a constant expression 1>C:\Program Files\Microsoft Vis...

Seems like libc++ implementations of device functions do not support long double (i.e. CUDA doesnt have long double), so I am getting errors in visit_format_arg The treatment for me was to use long doubles as regular double here: fmt/include/fmt/core.h Line 1662...

Minimal reproducer (godbolt): fmt::print("{} {a}", 1, "a"_a = 2); I believe this is supposed to compile, but it causes: on_error("cannot switch from automatic to manual argument indexing"); Are the named arguments considered as "indexed", or is it a bug? It works with fmt::runtime, so if nothing e...