(1) g++ -v output info:

Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/hillstone/libexec/gcc/i686-pc-linux-gnu/4.9.3/lto-wrapper
Target: i686-pc-linux-gnu
Configured with: ../gcc_4.9/configure --with-pkgversion='gxb'\''s c++ study' --prefix=/home/hillstone
Thread model: posix
gcc version 4.9.3 20141124 (prerelease) (gxb's c++ study)

i build gcc by myself, Before and after gcc4.9.2 released，it has the same problem。

(2) svn info output info：

Path: .
URL: svn://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch
Repository Root: svn://gcc.gnu.org/svn/gcc
Repository UUID: 138bc75d-0d04-0410-961f-82ee72b054a4
Revision: 217996
Node Kind: directory
Schedule: normal
Last Changed Author: gccadmin
Last Changed Rev: 217994
Last Changed Date: 2014-11-24 08:16:23 +0800 (Mon, 24 Nov 2014)

（3）test code

#include <iostream>
#include <utility>
class foo{
    public:
        foo() = default;

        foo(const foo &fv):iv(fv.iv){std::cout << "foo copy constructor\n";}
        foo &operator=(foo &fv)
        {
            std::cout << "foo copy assignment\n";
            iv = fv.iv;
            return *this;
        }
        ~foo()
        {
            std::cout << "foo destructor\n";
        }
    private:
        int iv;
};

class test
{
    public:
        test() = default;
        test(const test &tv):iv(tv.iv){
            std::cout << "test copy constructor\n";
        }

        test &operator=(const test &fv)
        {
            std::cout << "test copy assignment\n"; 
            iv = fv.iv;
            return *this;
        }
        test(test &&) = default;
        test &operator=(test &&) = default;
    private:
        int iv;
        foo fv;
};

int main()
{
    test ta;
    test tb(std::move(ta));
    ta = std::move(tb);
    return 0;
}

（4）compiling cmmand

 g++ -std=c++11 test_move_operation_match.cpp -o test

（5）test program output

./test 
foo copy constructor
test copy assignment
foo destructor
foo destructor

（6）result analysis

in class test,we explicit use synthesized move operation,and define copy operation with output information。Had class test have a data member with foo class type。we make class foo have copy constructor、copy assignment operator and destructor。

there was no “test copy constructor” outputs but ”foo copy constructor“，
this means that the compiler chooses the the synthesized move constructor which 
calls the member‘s copy constructor。Is this OK？ 

in the ”c++ primer 5th“ 13.6.2 chapter，the class test’s move constructor should be ”delete“。similarly for move assignment operator。

Another output ”test copy assignment“，compiler uses copy assignment operator。

what about the move assignment operator？ isn't synthesizeed at all or synthesized as ”delete“。

i think both the two move operations shuld be ”delete“。“=default” indicate the compiler synthesizes move operation。when compiler can't achieve，it should nofity the user by declaring “delete”。i agree with ”c++ primer“ book。


my english so poor，i may not describe the problem clearly and may have improper tone。Don't keep that in mind。