text.mod/graphviz.mod/graphviz/lib/util/unused.h

/// \file
/// \brief abstraction for squashing compiler warnings for unused symbols
/// \ingroup cgraph_utils

#pragma once

/// squash an unused variable/function warning in C
///
/// e.g.
///
///   static UNUSED void my_uncalled_function(void) { }
///   static UNUSED int my_unused_variable;
///
/// Use this sparingly, as the MSVC version applies to everything in both the
/// current and next line, so can end up accidentally masking genuine problems.
#ifdef __GNUC__ // Clang and GCC
#define UNUSED __attribute__((unused))
#elif defined(_MSC_VER) // MSVC
#define UNUSED                                                                 \
  __pragma(warning(suppress : 4100 /* unreferenced formal parameter */         \
                   4101            /* unreferenced local variable */           \
                   4505            /* unreferenced local function */           \
                   ))
#else
#define UNUSED /* nothing */
#endif