llvm-project/clang/test/Sema/pragma-unused.c

// RUN: clang-cc -fsyntax-only -verify %s

void f1(void) {
  int x, y, z;
  #pragma unused(x)
  #pragma unused(y, z)
  
  int w; // FIXME: We should emit a warning that 'w' is unused.  
  #pragma unused w // expected-warning{{missing '(' after '#pragma unused' - ignoring}}
}

void f2(void) {
  int x, y;
  #pragma unused(x,) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
  #pragma unused() // expected-warning{{expected '#pragma unused' argument to be a variable name}}
}

void f3(void) {
  #pragma unused(x) // expected-warning{{undeclared variable 'x' used as an argument for '#pragma unused'}}
}

void f4(void) {
  int w; // FIXME: We should emit a warning that 'w' is unused.
  #pragma unused((w)) // expected-warning{{expected '#pragma unused' argument to be a variable name}}
}

int k;
void f5(void) {
  #pragma unused(k) // expected-warning{{only local variables can be arguments to '#pragma unused'}}
}

void f6(void) {
  int z; // no-warning
  {
    #pragma unused(z) // no-warning
  }
}

void f7() {
  int y;
  #pragma unused(undeclared, undefined, y) // expected-warning{{undeclared variable 'undeclared' used as an argument for '#pragma unused'}} expected-warning{{undeclared variable 'undefined' used as an argument for '#pragma unused'}}
}