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From: "igodard at pacbell dot net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/52288] New: Trouble with operator?: and lambdas
Date: Thu, 16 Feb 2012 23:12:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D52288

             Bug #: 52288
           Summary: Trouble with operator?: and lambdas
    Classification: Unclassified
           Product: gcc
           Version: 4.6.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: igodard@pacbell.net


This code:

int main(int argc, char** argv) {
    bool b;
    void* p =3D b ? [argc](int i){ return i; } :
        [argc](int i){ return i; };
return 0; }

gets you this:

s3:~/ootbc/personal/ivan$ g++ --std=3Dc++0x foo.cc
foo.cc: In function =C3=A2int main(int, char**)=C3=A2:
foo.cc:5:28: error: no match for ternary =C3=A2operator?:=C3=A2 in =C3=A2b =
? {argc} : {argc}=C3=A2

which is a poor. Meanwhile this code:

int main(int argc, char** argv) {
    bool b;
    void* p =3D b ? &[argc](int i){ return i; } :
        &[argc](int i){ return i; };
return 0; }

gets you this:

s3:~/ootbc/personal/ivan$ g++ --std=3Dc++0x foo.cc
foo.cc: In function =C3=A2int main(int, char**)=C3=A2:
foo.cc:4:42: error: taking address of temporary [-fpermissive]
foo.cc:5:29: error: taking address of temporary [-fpermissive]
foo.cc:5:29: error: conditional expression between distinct pointer types
=C3=A2main(int, char**)::<lambda(int)>*=C3=A2 and =C3=A2main(int, char**)::=
<lambda(int)>*=C3=A2
lacks a cast

which is even worse.