Function isSep [src]
Returns true if c is a valid path separator for the path_type.
  Prototype
 pub inline fn isSep(comptime path_type: PathType, comptime T: type, c: T) bool  Parameters
path_type: PathTypeT: typec: T Source
 pub inline fn isSep(comptime path_type: PathType, comptime T: type, c: T) bool {
    return switch (path_type) {
        .windows => c == '/' or c == '\\',
        .posix => c == '/',
        .uefi => c == '\\',
    };
}