llvm-project/clang/test/Sema/warn-unused-variables.c

33 lines
706 B
C

// RUN: %clang_cc1 -fsyntax-only -Wunused-variable -fblocks -verify %s
struct s0 {
unsigned int i;
};
int proto(int a, int b);
void f0(void) {
int a __attribute__((unused)),
b; // expected-warning{{unused}}
return;
}
void f1(void) {
int i;
(void)sizeof(i);
return;
}
// PR5933
int f2() {
int X = 4; // Shouldn't have a bogus 'unused variable X' warning.
return Y + X; // expected-error {{use of undeclared identifier 'Y'}}
}
int f3() {
int X1 = 4;
(void)(Y1 + X1); // expected-error {{use of undeclared identifier 'Y1'}}
(void)(^() { int X = 4; }); // expected-warning{{unused}}
(void)(^() { int X = 4; return Y + X; }); // expected-error {{use of undeclared identifier 'Y'}}
}