Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/g++.dg/template/condition1.C @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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// PR c++/47950 template <typename T> struct empty { // allow success case to build (not relevant to bug) operator bool() { return true; } }; template <typename T> struct from_int { from_int(int) {} // allow success case to build (not relevant to bug) operator bool() { return true; } }; template <typename T> from_int<T> via_function(T v) { return from_int<T>(v); } template <typename T> void f() { // ********* this section compiles *********** // these plain initializers work fine from_int<int> a = 7; from_int<int> b = from_int<int>(7); empty<int> c = empty<int>(); from_int<T> ta = 7; from_int<T> tb = from_int<T>(7); empty<T> tc = empty<T>(); // these dependent condition decls work fine if (empty<T> x = empty<T>()) ; if (from_int<T> x = 7) ; if (from_int<T> x = from_int<T>(7)) ; if (from_int<T> x = via_function(T())) ; // this non-dependent condition decl using conversion works fine if (from_int<int> x = 7) ; // these non-dependent condition decls using conversion or braced- // initialization work fine (in c++0x mode only course) #if __GXX_EXPERIMENTAL_CXX0X__ if (empty<int> x {}) ; if (from_int<int> x {7}) ; #endif // ********** this section fails in C++0x *********** // the following non-dependent condition decls cause an assertion // failure in // // tsubst_copy_and_build, at cp/pt.c:13370 // // in C++0x mode // if (empty<int> x = empty<int>()) ; if (from_int<int> x = from_int<int>(7)) ; if (from_int<int> x = via_function(7)) ; } int main() { f<int>(); }