c – 编译器抱怨模板参数的数量错误,即使它在boost库文件中是正

type_traits/has_new_operator.hpp:45: error: wrong number of template
arguments (1,should be 2) type_traits/has_new_operator.hpp:24: error:
provided for ‘template struct boost::detail::test’

根据第24行,它需要2个参数,这就是第42行传递的内容.另外,如果你观察第31行,那么已经完成了相同但编译器没有抱怨它.

21: namespace boost {
22: namespace detail {
23: template <class U,U x> 
24:    struct test;
25:
26: template <typename T>
27: struct has_new_operator_impl {
28:    template<class U>
29:    static type_traits::yes_type check_sig1(
30:        U*,31:        test<
32:        void *(*)(std::size_t),33:            &U::operator new
34:        >* = NULL
35:    );
36:    template<class U>
37:    static type_traits::no_type check_sig1(...);

39:    template<class U>
40:    static type_traits::yes_type check_sig2(
41:        U*,42:        test<
43:        void *(*)(std::size_t,const std::nothrow_t&),44:            &U::operator new
45:        >* = NULL
    );