clang-tools-extra/test/clang-tidy/misc-unused-using-decls.cpp


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// RUN: %check_clang_tidy %s misc-unused-using-decls %t

// ----- Definitions -----
template <typename T> class vector {};
namespace n {
class A;
class B;
class C;
class D;
class D { public: static int i; };
template <typename T> class E {};
template <typename T> class F {};
}

// ----- Using declarations -----
// eol-comments aren't removed (yet)
using n::A; // A
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: using decl 'A' is unused
// CHECK-FIXES: {{^}}// A
using n::B;
using n::C;
using n::D;
using n::E; // E
// CHECK-MESSAGES: :[[@LINE-1]]:10: warning: using decl 'E' is unused
// CHECK-FIXES: {{^}}// E
using n::F;

// ----- Usages -----
void f(B b);
void g() {
  vector<C> data;
  D::i = 1;
  F<int> f;
}