gcc/testsuite/g++.dg/cpp/elifdef-3.C

// P2334R1
// { dg-do preprocess { target c++23 } }

#define A
#undef B

#elifdef A // { dg-error "#elifdef without #if" }
#elifdef B // { dg-error "#elifdef without #if" }
#elifndef A // { dg-error "#elifndef without #if" }
#elifndef B // { dg-error "#elifndef without #if" }

#if 1 // { dg-error "-:began here" }
#else
#elifdef A // { dg-error "#elifdef after #else" }
#endif

#if 1 // { dg-error "-:began here" }
#else
#elifdef B // { dg-error "#elifdef after #else" }
#endif

#if 1 // { dg-error "-:began here" }
#else
#elifndef A // { dg-error "#elifndef after #else" }
#endif

#if 1 // { dg-error "-:began here" }
#else
#elifndef B // { dg-error "#elifndef after #else" }
#endif

#if 0
#elifdef A = // { dg-error "extra tokens at end of #elifdef directive" }
#endif

#if 0
#elifdef B = // { dg-error "extra tokens at end of #elifdef directive" }
#endif

#if 0
#elifndef A = // { dg-error "extra tokens at end of #elifndef directive" }
#endif

#if 0
#elifndef B = // { dg-error "extra tokens at end of #elifndef directive" }
#endif

#if 0
#elifdef // { dg-error "no macro name given in #elifdef directive" }
#endif

#if 0
#elifndef // { dg-error "no macro name given in #elifndef directive" }
#endif

#if 0
#elifdef , // { dg-error "macro names must be identifiers" }
#endif

#if 0
#elifndef , // { dg-error "macro names must be identifiers" }
#endif