diff options
| author | Patrick Palka <ppalka@redhat.com> | 2022-01-28 15:41:15 -0500 |
|---|---|---|
| committer | Patrick Palka <ppalka@redhat.com> | 2023-06-30 00:03:15 -0400 |
| commit | 8c12c47d0c5c40df6e5eeb8625d4708c8a42dbe0 (patch) | |
| tree | 28292b4535dcd1e7deddbbeadd3122f240265b67 | |
| parent | ad42219766d0e67bede2c9bd94c98082cde42518 (diff) | |
c++: bogus warning with value init of const pmf [PR92752]
Here we're emitting a -Wignored-qualifiers warning for an intermediate
compiler-generated cast of nullptr to 'method-type* const' as part of
value initialization of a const pmf. This patch suppresses the warning
by instead casting to the corresponding unqualified type.
PR c++/92752
gcc/cp/ChangeLog:
* typeck.c (build_ptrmemfunc): Cast a nullptr constant to the
unqualified pointer type not the qualified one.
gcc/testsuite/ChangeLog:
* g++.dg/warn/Wignored-qualifiers2.C: New test.
Co-authored-by: Jason Merrill <jason@redhat.com>
(cherry picked from commit e971990cbda091b4caf5e1a5bded5121068934e4)
| -rw-r--r-- | gcc/cp/typeck.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/Wignored-qualifiers2.C | 17 |
2 files changed, 20 insertions, 1 deletions
diff --git a/gcc/cp/typeck.c b/gcc/cp/typeck.c index 548c81ef12c..b23f03a032b 100644 --- a/gcc/cp/typeck.c +++ b/gcc/cp/typeck.c @@ -9092,7 +9092,9 @@ build_ptrmemfunc (tree type, tree pfn, int force, bool c_cast_p, /* Handle null pointer to member function conversions. */ if (null_ptr_cst_p (pfn)) { - pfn = cp_build_c_cast (input_location, type, pfn, complain); + pfn = cp_build_c_cast (input_location, + TYPE_PTRMEMFUNC_FN_TYPE_RAW (to_type), + pfn, complain); return build_ptrmemfunc1 (to_type, integer_zero_node, pfn); diff --git a/gcc/testsuite/g++.dg/warn/Wignored-qualifiers2.C b/gcc/testsuite/g++.dg/warn/Wignored-qualifiers2.C new file mode 100644 index 00000000000..c4c37545c02 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wignored-qualifiers2.C @@ -0,0 +1,17 @@ +// PR c++/92752 +// { dg-do compile } +// { dg-additional-options "-Wignored-qualifiers" } + +struct X; + +template<class T> +struct Wrap { + T data; + Wrap() : data() {} +}; + +typedef int (X::*type)(); +Wrap<const type> x; +#if __cpp_initializer_lists +const type t{}; +#endif |