我这里有一些代码
template<typename T, std::size_t size, typename funcType>
struct foo
{
public:
foo(const funcType& func) : m_func(func) {}
~foo() {}
void m_call() { m_func(); }
private:
const funcType& m_func;
T x[size];
};
void printString() { std::cout << "some string\n"; }
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我可以创建一个对象
foo<int, 3, void(*)()> someObject(printString);
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或者
foo<int, 3, decltype(printString)> someObject(printString);
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但是当我尝试这样做时:
foo<int, 3> someObject(printString);
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我在 g++ 10.2 上收到此错误
error: wrong number of template arguments (2, should be 3)
foo<int, 3> someObject(printString);
^
note: provided for 'template<class T, long unsigned int size, …Run Code Online (Sandbox Code Playgroud)