Format Messages#

formatter allows users to customize the style of the messages being logged. Fields are mapped by named arguments and users can specify detailed format for each field.

auto writer = make_async_stdout_writer();
writer->set_formatter(
    formatter::builder()
        // Custom format pattern
        .set_pattern("{TIME:%FT%TZ} {LV:} >> {MSG:} << {FUNC:}{FILE:}{LINE:}{COL:}")
        // Show full path of source file
        .set_file_name_style(file_name_style::full_path)
        // Show log level with colors
        .set_color_level_style());

Argument Name

Type

Source

{TIME:}

std::chrono::time_point<std::chrono::system_clock>

std::chrono::system_clock::now()

{LV:}

log::level

{MSG:}

std::string

{LINE:}

std::uint32_t

std::source_location::current()

{COL:}

std::uint32_t

std::source_location::current()

{FILE:}

std::string_view

std::source_location::current()

{FUNC:}

std::string_view

std::source_location::current()
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