Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/cpp1z/constexpr-if31.C @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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// PR c++/81676 - bogus -Wunused warnings in constexpr if. // { dg-do compile { target c++17 } } // { dg-options "-Wall -Wextra" } template <typename T> int f1 (T v) { T x = 0; if constexpr(sizeof(T) == sizeof(int)) return v + x; else return 0; } template <typename T> int f2 (T v) // { dg-warning "unused parameter .v." } { T x = 0; if constexpr(sizeof(T) == sizeof(int)) return x; else return 0; } template <typename T> int f3 (T v) { T x = 0; // { dg-warning "unused variable .x." } if constexpr(sizeof(T) == sizeof(int)) return v; else return 0; } template <typename T> int f4 (T v) { T x = 0; if constexpr(sizeof(T) == sizeof(int)) return 0; else return v + x; } template <typename T> int f5 (T v) // { dg-warning "unused parameter .v." } { T x = 0; if constexpr(sizeof(T) == sizeof(int)) return 0; else return x; } template <typename T> int f6 (T v) { T x = 0; // { dg-warning "unused variable .x." } if constexpr(sizeof(T) == sizeof(int)) return 0; else return v; } int main() { f1(0); f1('a'); f2(0); f2('a'); f3(0); f3('a'); f4(0); f4('a'); f5(0); f5('a'); f6(0); f6('a'); }