Defined in 3 files as a function:
- external/gpl2/groff/dist/src/preproc/eqn/lex.cpp, line 934 (as a function)
- external/gpl2/groff/dist/src/preproc/pic/lex.cpp, line 1319 (as a function)
- external/gpl3/gcc/dist/libcpp/directives.c, line 654 (as a function)