make_shared 创建 std::shared_ptr？海湾合作委员会 4.6.2
我正在使用海湾合作委员会4.6.2。
我正在尝试在向量shared_ptr中push_back。
但 gcc 每次都会出错。
这是我的代码行：
std::vector< std::tr1::shared_ptr<Process> > procs;
std::string line;
while (getline(file, line) && line.find(JobMask) != std::string::npos)
{
std::string procName = line.substr(line.find(JobMask) + JobMask.size());
std::vector<Instruction> procInstructions = extractProgram(file);
std::queue<int> procInputs = extractInputs(file);
if (!procInstructions.empty())
procs.push_back(std::make_shared<Process>(Process(procName, procInputs, procInstructions))); //line 51
}
return procs;
我的 gcc 给出的错误是：
Process.cpp: In static member function 'static std::vector<std::tr1::shared_ptr<RMMIX::Process> > RMMIX::Process::createProcesses(const string&)':
Process.cpp:51:95: error: no matching function for call to 'std::vector<std::tr1::shared_ptr<RMMIX::Process> >::push_back(std::shared_ptr<RMMIX::Process>)'
Process.cpp:51:95: note: candidates are:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:826:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::tr1::shared_ptr<RMMIX::Process>, _Alloc = std::allocator<std::tr1::shared_ptr<RMMIX::Process> >, std::vector<_Tp, _Alloc>::value_type = std::tr1::shared_ptr<RMMIX::Process>]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:826:7: note: no known conversion for argument 1 from 'std::shared_ptr<RMMIX::Process>' to 'const value_type& {aka const std::tr1::shared_ptr<RMMIX::Process>&}'
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:839:7: note: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::tr1::shared_ptr<RMMIX::Process>, _Alloc = std::allocator<std::tr1::shared_ptr<RMMIX::Process> >, std::vector<_Tp, _Alloc>::value_type = std::tr1::shared_ptr<RMMIX::Process>]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:839:7: note: no known conversion for argument 1 from 'std::shared_ptr<RMMIX::Process>' to 'std::vector<std::tr1::shared_ptr<RMMIX::Process> >::value_type&& {aka std::tr1::shared_ptr<RMMIX::Process>&&}'
在我看来，错误是 std::make_shared 创建一个 std::shared_ptr。
但在 gcc 中，shared_ptr 位于命名空间 std::tr1 中。
我该如何修复它？
i'm using gcc 4.6.2.
I'm trying to push_back in a vector shared_ptr's.
But gcc gives me everytime an error.
Here my codelines:
std::vector< std::tr1::shared_ptr<Process> > procs;
std::string line;
while (getline(file, line) && line.find(JobMask) != std::string::npos)
{
std::string procName = line.substr(line.find(JobMask) + JobMask.size());
std::vector<Instruction> procInstructions = extractProgram(file);
std::queue<int> procInputs = extractInputs(file);
if (!procInstructions.empty())
procs.push_back(std::make_shared<Process>(Process(procName, procInputs, procInstructions))); //line 51
}
return procs;
The Error my gcc is giving is:
Process.cpp: In static member function 'static std::vector<std::tr1::shared_ptr<RMMIX::Process> > RMMIX::Process::createProcesses(const string&)':
Process.cpp:51:95: error: no matching function for call to 'std::vector<std::tr1::shared_ptr<RMMIX::Process> >::push_back(std::shared_ptr<RMMIX::Process>)'
Process.cpp:51:95: note: candidates are:
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:826:7: note: void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::tr1::shared_ptr<RMMIX::Process>, _Alloc = std::allocator<std::tr1::shared_ptr<RMMIX::Process> >, std::vector<_Tp, _Alloc>::value_type = std::tr1::shared_ptr<RMMIX::Process>]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:826:7: note: no known conversion for argument 1 from 'std::shared_ptr<RMMIX::Process>' to 'const value_type& {aka const std::tr1::shared_ptr<RMMIX::Process>&}'
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:839:7: note: void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::tr1::shared_ptr<RMMIX::Process>, _Alloc = std::allocator<std::tr1::shared_ptr<RMMIX::Process> >, std::vector<_Tp, _Alloc>::value_type = std::tr1::shared_ptr<RMMIX::Process>]
/usr/lib/gcc/x86_64-pc-linux-gnu/4.6.2/include/g++-v4/bits/stl_vector.h:839:7: note: no known conversion for argument 1 from 'std::shared_ptr<RMMIX::Process>' to 'std::vector<std::tr1::shared_ptr<RMMIX::Process> >::value_type&& {aka std::tr1::shared_ptr<RMMIX::Process>&&}'
In my eyes the error say's, that std::make_shared create a std::shared_ptr.
But in gcc shared_ptr is in the namespace std::tr1.
How could i fix it?
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如果我理解正确的话，
make_shared是 C++11 中的新功能，位于命名空间std中，但仅当使用-std=gnu+ 编译时才可用+0x或类似的。但如果您这样做，那么shared_ptr也会在std中。问题是
std::tr1中有另一个版本的shared_ptr，但在 C++11 模式下你不应该使用它：它应该被视为已弃用。。您的解决方案只是删除对
tr1的所有使用，并使用这些类的完整 C++11 版本。If I understand correctly,
make_sharedis new in C++11 and is in namespacestd, but it is only available if you compile with-std=gnu++0xor similar. But if you do that, thenshared_ptris also instd.The problem is that there is another version of
shared_ptrinstd::tr1, but in C++11 mode you should not use it: it should be considered deprecated.Your solution is simply to remove every use of
tr1and use the full C++11 version of these classes.C++ 模板错误消息可能很难读。但答案就在第二个注释中。
问题是您正在使用
std::make_shared（它创建一个std::shared_ptr）并将其传递到std::tr1:: 的向量中共享_ptr。最简单的解决方案是删除 TR1。 TR1 中的内容是编译器在添加 C++11 支持时首先实现的一些功能。
如果您无法停止使用
std::tr1::shared_ptr。您必须放弃使用make_shared，因为它不是 TR1 的一部分。C++ template error message can be a beast to read. But the answer is in the 2nd note.
The problem is you're using
std::make_shared(which creates astd::shared_ptr) and passing it into a vector ofstd::tr1::shared_ptr.The simplest solution is drop the TR1. The stuff from the TR1 was some of first features implemented by compilers when adding C++11 support.
If you are unable to stop using
std::tr1::shared_ptr. You'll have to forgo usingmake_sharedas it was not part of the TR1.