// RUN: %clang_cc1 -fsyntax-only -Wunused -Wused-but-marked-unused -std=c++17 -Wc++17-extensions -verify %s // RUN: %clang_cc1 -fsyntax-only -Wunused -Wused-but-marked-unused -std=c++11 -Wc++17-extensions -verify -DEXT %s static_assert(__has_cpp_attribute(maybe_unused) == 201603, ""); struct [[maybe_unused]] S {}; void f() { int x; // expected-warning {{unused variable}} typedef int I; // expected-warning {{unused typedef 'I'}} // Should not warn about these due to not being used. [[maybe_unused]] int y; typedef int maybe_unused_int [[maybe_unused]]; // Should not warn about these uses. S s; maybe_unused_int test; y = 12; } #ifdef EXT // expected-warning@6 {{use of the 'maybe_unused' attribute is a C++17 extension}} // expected-warning@13 {{use of the 'maybe_unused' attribute is a C++17 extension}} // expected-warning@14 {{use of the 'maybe_unused' attribute is a C++17 extension}} #endif |