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| author | Jason Merrill <jason@redhat.com> | 2024-07-25 23:09:31 -0400 |
|---|---|---|
| committer | Jason Merrill <jason@redhat.com> | 2024-07-26 15:28:49 -0400 |
| commit | ea381d87ecc711d0003ae6841477ae8000894844 (patch) | |
| tree | a454093222e8d86dc72741c36b21e24a49cca654 /gcc | |
| parent | 2fb5bbe5ee9c148cd7d1068b18be66cc52054812 (diff) | |
| download | gcc-ea381d87ecc711d0003ae6841477ae8000894844.zip gcc-ea381d87ecc711d0003ae6841477ae8000894844.tar.gz gcc-ea381d87ecc711d0003ae6841477ae8000894844.tar.bz2 | |
c++: trait as typename scope [PR116052]
The stdexec library currently wrongly ends up using __decay as the scope of
a typename, which leads to a crash. Let's give an error instead.
PR c++/116052
gcc/cp/ChangeLog:
* mangle.cc (write_prefix): Handle TRAIT_EXPR.
gcc/testsuite/ChangeLog:
* g++.dg/ext/decay1.C: New test.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/cp/mangle.cc | 3 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/ext/decay1.C | 16 |
2 files changed, 18 insertions, 1 deletions
diff --git a/gcc/cp/mangle.cc b/gcc/cp/mangle.cc index a04bc58..e739122 100644 --- a/gcc/cp/mangle.cc +++ b/gcc/cp/mangle.cc @@ -1300,7 +1300,8 @@ write_prefix (const tree node) MANGLE_TRACE_TREE ("prefix", node); - if (TREE_CODE (node) == DECLTYPE_TYPE) + if (TREE_CODE (node) == DECLTYPE_TYPE + || TREE_CODE (node) == TRAIT_TYPE) { write_type (node); return; diff --git a/gcc/testsuite/g++.dg/ext/decay1.C b/gcc/testsuite/g++.dg/ext/decay1.C new file mode 100644 index 0000000..dd457ba --- /dev/null +++ b/gcc/testsuite/g++.dg/ext/decay1.C @@ -0,0 +1,16 @@ +// PR c++/116052 +// { dg-do compile { target c++11 } } + +template <class T> using decay_t = __decay(T); +template <class T> void g(typename decay_t<T>::foo); // { dg-error "built-in" } +template <class T> void f() +{ + g<T>(0); +} + +struct A { using foo = int; }; + +int main() +{ + f<A>(); +} |