17 lines · c
1// RUN: %clang_cc1 %s -fsyntax-only -verify -std=c89 -Wno-sizeof-array-decay2 3struct s { char c[17]; };4extern struct s foo(void);5 6struct s a, b, c;7 8int A[sizeof((foo().c)) == 17 ? 1 : -1];9int B[sizeof((a.c)) == 17 ? 1 : -1];10 11 12// comma does not promote array/function in c90 unless they are lvalues.13int W[sizeof(0, a.c) == sizeof(char*) ? 1 : -1];14int X[sizeof(0, (foo().c)) == 17 ? 1 : -1];15int Y[sizeof(0, (a,b).c) == 17 ? 1 : -1];16int Z[sizeof(0, (a=b).c) == 17 ? 1 : -1]; // expected-warning {{expression with side effects has no effect in an unevaluated context}}17