int x[6] = {1, 2, 3, 4, 5, 6}
這種語法已經被MSVC2010
methodName({1, 2, 3, 4, 5, 6})
supprted但是,這不支持。如上所述,只有「int const(&)[6]」函數參數纔有意義。
這一翻譯則可以使用以下語法:
methodName(make_array(1,2,3,4,5,6));
Example implementation:
#include <iostream>
#include <ostream>
using namespace std;
template<typename T,unsigned size>
struct Array
{
typedef T type[size];
mutable type data;
Array()
{
cout << "Array::Array" << endl;
}
~Array()
{
cout << "Array::~Array" << endl;
}
};
template<typename T> inline
typename Array<T,1>::type &make_array(const T &p1,const Array<T,1> &aux=Array<T,1>())
{
aux.data[0]=p1;
return aux.data;
}
template<typename T> inline
typename Array<T,2>::type &make_array(const T &p1,const T &p2,const Array<T,2> &aux=Array<T,2>())
{
aux.data[0]=p1;
aux.data[1]=p2;
return aux.data;
}
template<typename T> inline
typename Array<T,3>::type &make_array(const T &p1,const T &p2,const T &p3,const Array<T,3> &aux=Array<T,3>())
{
aux.data[0]=p1;
aux.data[1]=p2;
aux.data[2]=p3;
return aux.data;
}
// ...
void test_array(int (&p)[3])
{
cout << p[0] << " " << p[1] << " " << p[2] << endl;
}
void test_ptr(int *p)
{
cout << p[0] << " " << p[1] << " " << p[2] << endl;
}
int main(int argc,char *argv[])
{
test_array(make_array(33,22,11));
test_ptr(make_array(33,22,11));
return 0;
}
或者,with help of Boost.Preprocessor:
#include <iostream>
#include <ostream>
using namespace std;
// ______________________________________________________________
template<typename T,unsigned size>
struct Array
{
typedef T type[size];
mutable type values;
Array()
{
cout << "Array::Array" << endl;
}
~Array()
{
cout << "Array::~Array" << endl;
}
};
#include <boost/preprocessor/iteration/local.hpp>
#include <boost/preprocessor/repetition/enum.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#define MAKE_ARRAY_PP_MAX_ARG_COUNT 16
#define MAKE_ARRAY_PP_PARAM_LIST(z, n, data) const T & BOOST_PP_CAT(p, n)
#define MAKE_ARRAY_PP_PARAM_ASSIGN(z, n, data) aux.values[n] = BOOST_PP_CAT(p, n);
#define BOOST_PP_LOCAL_MACRO(n) \
template<typename T> inline \
typename Array<T,n>::type &make_array(BOOST_PP_ENUM(n, MAKE_ARRAY_PP_PARAM_LIST, _) , const Array<T,n> &aux=Array<T,n>()) \
{ \
BOOST_PP_REPEAT(n, MAKE_ARRAY_PP_PARAM_ASSIGN, _) \
return aux.values; \
} \
/**/
#define BOOST_PP_LOCAL_LIMITS (1, MAKE_ARRAY_PP_MAX_ARG_COUNT)
#include BOOST_PP_LOCAL_ITERATE()
// ______________________________________________________________
void test_array(int (&p)[3])
{
cout << p[0] << " " << p[1] << " " << p[2] << endl;
}
void test_ptr(int *p)
{
cout << p[0] << " " << p[1] << " " << p[2] << endl;
}
int main(int argc,char *argv[])
{
test_array(make_array(33,22,11));
test_ptr(make_array(33,22,11));
make_array(33,22,11,00,55,44,66);
make_array(1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16);
return 0;
}
INT X [6] = {1,2,3, 4,5,6};正常工作 – harper
'methodName'的聲明是什麼?唯一有意義的方法是如果參數是'int const(&)[6]'(或者這個的模板版本),甚至只有C++ 11。 –
@CerrekSB在C++ 11中,可以調用一個函數,它使用一個向量,一個std :: array或使用該語法的很多東西。 – bames53