[Bug c++/65598] New: Misleading error message for out-of-class definition of explicit conversion operator

[arvo at me dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65598

            Bug ID: 65598
           Summary: Misleading error message for out-of-class definition
                    of explicit conversion operator
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: arvo at me dot com

Created attachment 35160
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35160&action=edit
Preprocessed source

System report:
OS: GNU/Linux x86_64
Distribution: openSUSE 13.1
Package info:
  Informationen für Paket gcc49-c++:
  ----------------------------------
  Repository: @System
  Name: gcc49-c++
  Version: 4.9.1+r213409-44.1
  Arch: x86_64
  Anbieter: obs://build.opensuse.org/devel:gcc
  Installiert: Ja
  Status: aktuell
  Installierte Größe: 17,3 MiB
  Zusammenfassung: The GNU C++ Compiler
  Beschreibung: 
  This package contains the GNU compiler for C++.


Test program (C++11):

  struct ExplicitTest
  {
      explicit operator bool() const;
  };

  explicit ExplicitTest::operator bool() const
  {
      return true;
  }

The program is ill-formed because explicit is only allowed inside a class
definition, as per §7.1.2/6 Function Specifiers [N3376]. However, the error
message is misleading and seems not to have been updated for C++11, where
explicit conversion operators were introduced:

$ g++-4.9 -c -std=c++11 explicit_operator_bool.cxx
explicit_operator_bool.cxx:6:40: error: only declarations of constructors can
be ‘explicit’
 explicit ExplicitTest::operator bool() const
                                        ^

(Also it would probably be better to place the caret underneath "explicit".)