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[英]Is there a way to make a class member object's template call a different constructor?
[英]Call constructor of member object
我尝试实现amySQL,并且想初始化该连接器简介测试功能。
class Foo
{
public:
void Test();
protected:
amy::connector mgr;
private:
asio::io_service m;
};
void Foo::Test()
{
mgr(m);
}
但是,当我要编译时,出现此错误:
error: no match for call to '(amy::connector {aka amy::basic_connector<amy::mysql_service>}) (asio::io_service&)'
mgr(m);
我在这里做错了什么? 到amy sql的存储库https://github.com/liancheng/amy
您需要在Foo
类构造函数中而不是在Test()
类方法中初始化mgr
成员:
class Foo
{
public:
Foo();
void Test();
private:
asio::io_service m;
protected:
amy::connector mgr;
};
Foo::Foo() : mgr(m) // <-- initialize here!
{
}
void Foo::Test()
{
// use mgr here as needed...
}
您可以在类构造函数的初始化列表中初始化成员
Foo::Foo() : mgr(m) {}
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