Hi!
Mangling of decltype(auto) has been added back in April 2013:
https://gcc.gnu.org/ml/gcc-patches/2013-04/msg01273.html
and matches the
https://mentorembedded.github.io/cxx-abi/abi.html#mangling
::= Da # auto
::= Dc # decltype(auto)
part, but the corresponding demangler change has never been added.
The following patch adds it.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2016-12-10 Jakub Jelinek <ja...@redhat.com>
PR c++/78761
* cp-demangle.c (cplus_demangle_type): Demangle Dc as decltype(auto).
* testsuite/demangle-expected: Add test for decltype(auto).
--- libiberty/cp-demangle.c.jj 2016-11-30 08:57:16.000000000 +0100
+++ libiberty/cp-demangle.c 2016-12-10 09:31:17.698046004 +0100
@@ -2590,7 +2590,11 @@ cplus_demangle_type (struct d_info *di)
/* auto */
ret = d_make_name (di, "auto", 4);
break;
-
+ case 'c':
+ /* decltype(auto) */
+ ret = d_make_name (di, "decltype(auto)", 14);
+ break;
+
case 'f':
/* 32-bit decimal floating point */
ret = d_make_builtin_type (di, &cplus_demangle_builtin_types[26]);
--- libiberty/testsuite/demangle-expected.jj 2016-11-16 07:13:50.000000000
+0100
+++ libiberty/testsuite/demangle-expected 2016-12-10 09:39:44.277651914
+0100
@@ -4200,6 +4200,9 @@ decltype (new auto({parm#1})) f<int>(int
_Z1fIiERDaRKT_S1_
auto& f<int>(int const&, int)
--format=gnu-v3
+_Z1gIiEDcRKT_S0_
+decltype(auto) g<int>(int const&, int)
+--format=gnu-v3
_Z1gILi1EEvR1AIXT_EER1BIXscbT_EE
void g<1>(A<1>&, B<static_cast<bool>(1)>&)
--format=gnu-v3
Jakub
