这在Visual Studio 2010中工作,但在2012 Update 2(与Boost 1.5.3)中不工作:
vector<vector<BYTE>> data = assign::list_of (assign::list_of (0x06)(0x02));
编译器给出的错误(已更新):
C:Program Files (x86)Microsoft Visual Studio 11.0VCincludexmemory0(617): error C2668: 'std::vector<_Ty>::vector' : ambiguous call to overloaded function
with
[
_Ty=BYTE
]
C:Program Files (x86)Microsoft Visual Studio 11.0VCincludevector(786): could be 'std::vector<_Ty>::vector(std::vector<_Ty> &&)'
with
[
_Ty=BYTE
]
C:Program Files (x86)Microsoft Visual Studio 11.0VCincludevector(693): or 'std::vector<_Ty>::vector(unsigned __int64)'
with
[
_Ty=BYTE
]
while trying to match the argument list '(boost::assign_detail::generic_list<T>)'
with
[
T=int
]
... (dozens of more lines)
有办法解决这个错误吗?
我认为问题不是来自嵌入,而是来自使用list_of创建临时值。应该可以了:
vector<BYTE> temp = assign::list_of (0x06)(0x02);
vector<vector<Byte> > data = assign::list_of(temp);
我没有VC11所以只是一个大胆的猜测…可能VC11混淆了,因为您的整数可以转换为BYTE
,因此将使用move-constructor或转换为size_t
,因此将使用std::vector(size_t)
constructor。
请尝试自己转换为BYTE
,以避免隐式转换:
vector<vector<BYTE>> data = assign::list_of (assign::list_of (static_cast<BYTE>(0x06))(static_cast<BYTE>(0x02)));
你需要用模板参数来帮助boost::assign::list_of:
// C2668:
std::vector<std::vector<int>> foo1 =
boost::assign::list_of(boost::assign::list_of(0)(1));
// no C2668:
std::vector<std::vector<int>> foo2 =
boost::assign::list_of<std::vector<int>>(boost::assign::list_of(0)(1));