FILENAME_MAX

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
  1. enum FILENAME_MAX;
    version(Windows)
    extern (C) nothrow @nogc
    static if(!__traits(compiles, libressl_d.compat.stdio.FILENAME_MAX))
    enum FILENAME_MAX = core.sys.windows.windef.MAX_PATH;
  2. enum FILENAME_MAX;

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