Bug 17772 – Wrong C++ mangled names for templated functions

//////////////////// //////////////////// _Z3fooIiEiv (D) vs _ZN5SPACE3fooIiEET_v(C++) _Z4foo2IiEiv(D) vs _Z4foo2IiET_v (C++) //////////////////// //////////////////// ////////////// D DMD64 D Compiler v2.076.0-b1-dirty ``` extern(C++, SPACE) T foo(T)(){ T t; return t;} extern(C++) T foo2(T)(){ T t; return t;} pragma(msg, mangledName!(foo!int)); pragma(msg, mangledName!(foo2!int));``` output: _Z3fooIiEiv _Z4foo2IiEiv ////////////// C++ (clang++ for macos and linux) ``` namespace SPACE { template<class T> T foo() { T t; return t;} int bar(){ return foo<int>(); } } template<class T> T foo2() { T t; return t;} int bar2(){ return foo2<int>(); } ``` clang++ -emit-llvm -S -std=c++14 test_exc.cpp output: ; Function Attrs: nounwind ssp uwtable define linkonce_odr i32 @_ZN5SPACE3fooIiEET_v() #1 { %1 = alloca i32, align 4 %2 = load i32, i32* %1, align 4 ret i32 %2 } ; Function Attrs: nounwind ssp uwtable define linkonce_odr i32 @_Z4foo2IiET_v() #1 { %1 = alloca i32, align 4 %2 = load i32, i32* %1, align 4 ret i32 %2 }

Partial fix: https://github.com/dlang/dmd/pull/7906

Commits pushed to master at https://github.com/dlang/dmd https://github.com/dlang/dmd/commit/5bb9d291f2e544f74340150cea335ac7797dbec7 correct namespace mangling for Issue 17772 https://github.com/dlang/dmd/commit/9bed5b46cef44e5cd4e4ed49046329f582616021 Merge pull request #7906 from WalterBright/fix17772part1 correct namespace mangling for Issue 17772 merged-on-behalf-of: Iain Buclaw <[email protected]>

This has been fixed by https://github.com/dlang/dmd/pull/8455