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coord/ops: enable iff types are coords

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This commit is contained in:
Danny Robson 2015-11-04 23:22:49 +11:00
parent 23fff4a65a
commit 2ca4a7e291
1 changed files with 51 additions and 15 deletions
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66
coord/ops.hpp
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@ -50,6 +50,13 @@ namespace util {
template <> struct traits<vector,vector> { template <size_t S, typename T> using result = vector<S,T>; }; template <> struct traits<vector,vector> { template <size_t S, typename T> using result = vector<S,T>; };
} }
template <template <size_t,typename> class> struct is_coord : std::false_type { };
template <> struct is_coord<point> : std::true_type { };
template <> struct is_coord<extent> : std::true_type { };
template <> struct is_coord<vector> : std::true_type { };
template <> struct is_coord<colour> : std::true_type { };
/////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////
// vector operators // vector operators
#define ELEMENT_OP(OP) \ #define ELEMENT_OP(OP) \
@ -58,7 +65,11 @@ namespace util {
typename T, \ typename T, \
typename U, \ typename U, \
template <size_t,typename> class A, \ template <size_t,typename> class A, \
template <size_t,typename> class B \ template <size_t,typename> class B, \
typename = typename std::enable_if< \
is_coord<A>::value && is_coord<B>::value, \
void \
>::type \
> \ > \
auto \ auto \
operator OP (A<S,T> a, B<S,U> b) \ operator OP (A<S,T> a, B<S,U> b) \
@ -76,15 +87,18 @@ namespace util {
typename T, \ typename T, \
typename U, \ typename U, \
template <size_t,typename> class A, \ template <size_t,typename> class A, \
template <size_t,typename> class B \ template <size_t,typename> class B, \
typename = typename std::enable_if< \
is_coord<A>::value && \
is_coord<B>::value && \
std::is_same< \
typename std::common_type<T,U>::type, \
T \
>::value, \
void \
>::type \
> \ > \
typename std::enable_if< \ auto& \
std::is_same< \
typename std::common_type<T,U>::type, \
T \
>::value, \
A<S,T> \
>::type& \
operator PASTE(OP,=) (A<S,T>& a, B<S,U> b) \ operator PASTE(OP,=) (A<S,T>& a, B<S,U> b) \
{ \ { \
for (size_t i = 0; i < S; ++i) \ for (size_t i = 0; i < S; ++i) \
@ -106,12 +120,16 @@ namespace util {
size_t S, \ size_t S, \
typename T, \ typename T, \
typename U, \ typename U, \
template <size_t,typename> class K \ template <size_t,typename> class K, \
typename = typename std::enable_if< \
is_coord<K>::value,void \
>::type \
> \ > \
auto \ auto \
operator OP (U u, K<S,T> k) \ operator OP (U u, K<S,T> k) \
{ \ { \
K<S,typename std::common_type<T,U>::type> out; \ K<S,typename std::common_type<T,U>::type> out; \
\
for (size_t i = 0; i < S; ++i) \ for (size_t i = 0; i < S; ++i) \
out[i] = u OP k[i]; \ out[i] = u OP k[i]; \
return out; \ return out; \
@ -121,12 +139,16 @@ namespace util {
size_t S, \ size_t S, \
typename T, \ typename T, \
typename U, \ typename U, \
template <size_t,typename> class K \ template <size_t,typename> class K, \
typename = typename std::enable_if< \
is_coord<K>::value,void \
>::type \
> \ > \
auto \ auto \
operator OP (K<S,T> k, U u) \ operator OP (K<S,T> k, U u) \
{ \ { \
K<S,typename std::common_type<T,U>::type> out; \ K<S,typename std::common_type<T,U>::type> out; \
\
for (size_t i = 0; i < S; ++i) \ for (size_t i = 0; i < S; ++i) \
out[i] = k[i] OP u; \ out[i] = k[i] OP u; \
return out; \ return out; \
@ -151,7 +173,11 @@ namespace util {
size_t S, \ size_t S, \
typename T, \ typename T, \
typename U, \ typename U, \
template <size_t,typename> class K \ template <size_t,typename> class K, \
typename = typename std::enable_if< \
is_coord<K>::value, \
void \
>::type \
> \ > \
typename std::enable_if< \ typename std::enable_if< \
std::is_same< \ std::is_same< \
@ -163,6 +189,7 @@ namespace util {
{ \ { \
for (size_t i = 0; i < S; ++i) \ for (size_t i = 0; i < S; ++i) \
k[i] OP u; \ k[i] OP u; \
\
return k; \ return k; \
} }
@ -303,7 +330,11 @@ namespace util {
template <size_t,typename> class A, template <size_t,typename> class A,
template <size_t,typename> class B template <size_t,typename> class B
> >
T dot (A<S,T> a, B<S,T> b) typename std::enable_if<
is_coord<A>::value && is_coord<B>::value,
T
>::type
dot (A<S,T> a, B<S,T> b)
{ {
return dot<S,T> (a.data, b.data); return dot<S,T> (a.data, b.data);
} }
@ -314,7 +345,8 @@ namespace util {
typename T, typename T,
template <size_t,typename> class K template <size_t,typename> class K
> >
T dot (K<S,T> a, const T (&b)[S]) typename std::enable_if<is_coord<K>::value,T>::type
dot (K<S,T> a, const T (&b)[S])
{ {
return dot<S,T> (a.data, b); return dot<S,T> (a.data, b);
} }
@ -324,7 +356,11 @@ namespace util {
typename T, typename T,
template <size_t,typename> class K template <size_t,typename> class K
> >
T dot (const T (&a)[S], K<S,T> b) typename std::enable_if<
is_coord<K>::value,
T
>::type
dot (const T (&a)[S], K<S,T> b)
{ {
return dot<S,T> (a, b.data); return dot<S,T> (a, b.data);
} }