[Bug c++/97458] New: C++ parsing fails when calling specialized template method inside lambda

[Bug c++/97458] New: C++ parsing fails when calling specialized template method inside lambda

[gabriel_machado at live dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97458

            Bug ID: 97458
           Summary: C++ parsing fails when calling specialized template
                    method inside lambda
           Product: gcc
           Version: 8.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gabriel_machado at live dot com
  Target Milestone: ---

Created attachment 49385
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49385&action=edit
Minimal example

Minimal example:

template<class S>
struct A {
    template<class T> void fn();
    struct B { void init(A *p); };
};

template<class S>
void A<S>::B::init(A *p) {
    [p](){ p->fn<int>(); }; // BUG
    // [p](){ p->A::fn<int>(); }; // OK
    // [=](){ p->fn<int>(); }; // OK
}

int main(){}



Command: g++ gcc-bug.cpp
Output:

gcc-bug.cpp: In lambda function:
gcc-bug.cpp:13:18: error: expected primary-expression before ‘int’
     [p](){ p->fn<int>(); }; // BUG
                  ^~~
gcc-bug.cpp:13:18: error: expected ‘;’ before ‘int’
     [p](){ p->fn<int>(); }; // BUG
                  ^~~
                  ;



Command: g++ -v
Output:

Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/8/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 8.3.0-6'
--with-bugurl=file:///usr/share/doc/gcc-8/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-8
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 8.3.0 (Debian 8.3.0-6)

System: Debian GNU/Linux 10 under WSL

[Bug c++/97458] C++ parsing fails when calling specialized template method inside lambda

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97458

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-07-27
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
An easier work around is:
[p](){ p->template fn<int>(); }; 

Confirmed.

[Bug c++/97458] C++ parsing fails when calling specialized template method inside lambda

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97458

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Dup of bug 82980.

*** This bug has been marked as a duplicate of bug 82980 ***