clang/test/SemaCXX/warn-unused-but-set-parameters-cpp.cpp

   1 // RUN: %clang_cc1 -fblocks -fsyntax-only -Wunused-but-set-parameter -verify %s
   2
   3 int f0(int x,
   4        int y, // expected-warning{{parameter 'y' set but not used}}
   5        int z __attribute__((unused))) {
   6   y = 0;
   7   return x;
   8 }
   9
  10 void f1(void) {
  11   (void)^(int x,
  12           int y, // expected-warning{{parameter 'y' set but not used}}
  13           int z __attribute__((unused))) {
  14     y = 0;
  15     return x;
  16   };
  17 }
  18
  19 struct S {
  20   int i;
  21 };
  22
  23 // In C++, don't warn for a struct (following gcc).
  24 void f3(struct S s) {
  25   struct S t;
  26   s = t;
  27 }
  28
  29 // Also don't warn for a reference.
  30 void f4(int &x) {
  31   x = 0;
  32 }
  33
  34 // Make sure this doesn't warn.
  35 struct A {
  36   int i;
  37   A(int j) : i(j) {}
  38 };