fab4100 88a0e07ad5 Change access scope for ANSI target_file_ from private to protected (#3486) ...

This change allows for a custom minimal ANSI color sink implementation
that supports, for example, splitting between `stdout` and `stderr` file
streams depending on the log level.  An example application specific
custom sink that realizes this behavior would look like:

```cpp
template <typename ConsoleMutex>
class SplitSink : public sinks::ansicolor_sink<ConsoleMutex>
{
    using Base = sinks::ansicolor_sink<ConsoleMutex>;

public:
    SplitSink(color_mode mode = color_mode::automatic) : Base(stdout, mode) {}

    void log(const details::log_msg &msg) override
    {
        if (msg.level <= SPDLOG_LEVEL_WARN) {
            this->target_file_ = stdout;
        } else {
            this->target_file_ = stderr;
        }
        Base::log(msg);
    }
};
```

Inspired by https://github.com/gabime/spdlog/issues/345 and
https://github.com/eic/EICrecon/issues/456.  This commit aims at reusing
all of the `ansicolor_sink` code with the exception of dynamic target
file selection that can be implemented in application code based on
example above.

Co-authored-by: Fabian Wermelinger <info@0xfab.ch>

2025-11-09 19:38:28 +02:00

..

spdlog

Change access scope for ANSI target_file_ from private to protected (#3486)

2025-11-09 19:38:28 +02:00