[fusion][c++11] In place construction of a class containing a fusion map is broken

[Chris Crickmar <chris.crickmar@…>]

In place construction of a class containing a fusion map is broken using 1.55 and gcc 4.8 in c++11 mode. The problem is not present with c++11 disabled or when using previous boost versions (tested with 1.51 & 1.54).

Assuming a class ClassA contains a fusion map. The following code functions correctly:

ClassA object1;
std::pair<int, ClassA> pair0(0, object1);

This example does not function correctly:

std::pair<int, ClassA> pair0(0, ClassA());

Minimal sample attached.

Chris

[Chris Crickmar <chris.crickmar@…>]

I've just tested this on trunk (2014-03-18) with Fedora 18 (gcc 4.7). This is still an issue.

For completeness these are the compiler command lines being used and output:

g++ -W -Wall -Wextra -pedantic -I<path-to-boost> -o test-c main.cpp (works)

object copy construction (not broken)
MappedType 0 : 1234
MappedType 1 : 1234
in place construction (broken for c++11)
MappedType 0 : 1234
MappedType 1 : 1234

g++ -W -Wall -Wextra -pedantic -I<path-to-boost> -std=c++0x -o test-c main.cpp (fails)

object copy construction (not broken)
MappedType 0 : 1234
MappedType 1 : 1234
in place construction (broken for c++11)
MappedType 0 : 1234
MappedType 1 : 4.94066e-324 <------ FAILURE

[Joel de Guzman]

fixed now. thanks!