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源代码在线查看： noreturn-1.c
/* Check for various valid and erroneous "noreturn" cases. */ /* { dg-do compile } */ /* { dg-options "-O2 -Wmissing-noreturn" } */ extern void exit (int); extern void foo1(void) __attribute__ ((__noreturn__)); void foo1(void) { } /* { dg-warning "'noreturn' function does return" "detect falling off end of noreturn" } */ extern void foo2(void) __attribute__ ((__noreturn__)); void foo2(void) { exit(0); } /* { dg-bogus "warning:" "this function should not get any warnings" } */ extern void foo3(void); void foo3(void) { } /* { dg-bogus "warning:" "this function should not get any warnings" } */ extern void foo4(void); void foo4(void) { /* { dg-warning "candidate for attribute 'noreturn'" "detect noreturn candidate" } */ exit(0); } extern void foo5(void) __attribute__ ((__noreturn__)); void foo5(void) { return; /* { dg-warning "'noreturn' has a 'return' statement" "detect invalid return" } */ } /* { dg-warning "function does return" "detect return from noreturn" } */ extern void foo6(void); void foo6(void) { return; } /* { dg-bogus "warning:" "this function should not get any warnings" } */ extern void foo7(void); void foo7(void) { foo6(); } /* { dg-bogus "warning:" "this function should not get any warnings" } */ extern void foo8(void) __attribute__ ((__noreturn__)); void foo8(void) { foo7(); } /* { dg-warning "'noreturn' function does return" "detect return from tail call" } */
