King_DuckZ/duckhandy
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Detect char type for int to string conversions.

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Right now only char is supported. You have to provide your
own specialization of index_to_char for your character type
if you want the code to compile.
This commit is contained in:
King_DuckZ 2017-05-02 20:22:48 +01:00
parent b854a54293
commit 1a33afdc27
1 changed files with 13 additions and 1 deletions
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14
include/duckhandy/lexical_cast.hpp
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@ -21,6 +21,7 @@
#include "compatibility.h"
#include "sequence_bt.hpp"
#include "MaxSizedArray.hpp"
#include "has_method.hpp"
#include "sprout/math/log10.hpp"
#include "sprout/math/log2.hpp"
#include "sprout/math/pow.hpp"
@ -126,6 +127,17 @@ namespace dhandy {
return (parNum == 0 ? 0 : static_cast<std::size_t>(sprout::log10(sprout::abs(static_cast<long double>(parNum))) / sprout::log10(static_cast<double>(base)))) + 1;
}
};
define_has_typedef(char_type, CharType);
define_has_typedef(value_type, ValueType);
template <typename T, typename=void> struct get_char_type;
template <typename T> struct get_char_type<T, typename std::enable_if<HasCharTypeTypedef<T>::value>::type> {
typedef typename T::char_type value_type;
};
template <typename T> struct get_char_type<T, typename std::enable_if<HasValueTypeTypedef<T>::value && !HasCharTypeTypedef<T>::value>::type> {
typedef typename T::value_type value_type;
};
} //namespace implem
namespace tags {
@ -202,7 +214,7 @@ namespace dhandy {
struct lexical_cast {
template <typename T, typename F>
static T convert ( const typename std::enable_if<std::is_integral<F>::value, F>::type& parFrom ) {
auto indices = int_to_string<Tag, F, char>(parFrom);
auto indices = int_to_string<Tag, F, typename implem::get_char_type<T>::value_type>(parFrom);
return dhandy::customize::array_to_t<typename decltype(indices)::value_type, decltype(indices)::MAX_SIZE, T>::make(std::move(indices));
}