Use trait "enable_if_number"

pitrou · wesm · commit c7db1b0a9bf9 · 2018-08-06T15:44:53.000-04:00
diff --git a/cpp/src/arrow/compute/kernels/cast.cc b/cpp/src/arrow/compute/kernels/cast.cc
@@ -799,7 +799,7 @@ typename std::enable_if<std::is_integral<T>::value && std::is_unsigned<T>::value
 }
 
 template <typename O>
-struct CastFunctor<O, StringType, typename std::enable_if<is_number<O>::value>::type> {
+struct CastFunctor<O, StringType, enable_if_number<O>> {
   void operator()(FunctionContext* ctx, const CastOptions& options,
                   const ArrayData& input, ArrayData* output) {
     using out_type = typename O::c_type;

Original file line number	Diff line number	Diff line change
`@@ -799,7 +799,7 @@ typename std::enable_if<std::is_integral<T>::value && std::is_unsigned<T>::value`
`799`	`799`	`}`
`800`	`800`
`801`	`801`	`template <typename O>`
`802`		`-struct CastFunctor<O, StringType, typename std::enable_if<is_number<O>::value>::type> {`
	`802`	`+struct CastFunctor<O, StringType, enable_if_number<O>> {`
`803`	`803`	`void operator()(FunctionContext* ctx, const CastOptions& options,`
`804`	`804`	`const ArrayData& input, ArrayData* output) {`
`805`	`805`	`using out_type = typename O::c_type;`