Defined in 2 files as a macro:

• contrib/libstdc++/include/bits/concept_check.h, line 56 (as a macro)
• contrib/libstdc++/include/bits/concept_check.h, line 80 (as a macro)

Referenced in 5 files:

• contrib/libstdc++/include/bits/stl_map.h, line 106
• contrib/libstdc++/include/bits/stl_multimap.h, line 105
• contrib/libstdc++/include/bits/stl_multiset.h, line 95
• contrib/libstdc++/include/bits/stl_queue.h, line 330
• contrib/libstdc++/include/bits/stl_set.h, line 98