formatting chrono with padding

[jengelh]

The grammar in the documentation

   replacement_field: "{" [`arg_id`] [":" (`format_spec` | `chrono_format_spec`)] "}"

   chrono_format_spec: [[`fill`]`align`][`width`]["." `precision`][`chrono_specs`]
   chrono_specs: [`chrono_specs`] `conversion_spec` | `chrono_specs` `literal_char`
   conversion_spec: "%" [`modifier`] `chrono_type`

suggests to me that {:>30%H} is valid, but this is not what fmt-9.1.0 and/or master @ b908954 outputs.

Input:

#include <chrono>
#include <fmt/core.h>
#include <fmt/chrono.h>
int main()
{
        fmt::print("{:>30d}\n", 30);
        fmt::print("{:>30%H:%M}\n", std::chrono::system_clock::now());
}

Output:

                            30
>3023:48

Expected:

                            30
                         23:48

[vitaut]

Formatting of time points is still WIP and only supports chrono_specs at the moment. PRs to add support for other specifiers are welcome.

[jengelh]

Or maybe we can edit the documentation until that's supported?