rexy712/rexylib
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Make allocator and string_base compat easier to read and remove unneccessary concepts subdirectory

Browse Source
This commit is contained in:
rexy712
2022-06-26 11:55:35 -07:00
parent 5a6d7023ac
commit 7f47a4cbf8
7 changed files with 341 additions and 259 deletions
Download Patch File Download Diff File Expand all files Collapse all files

62
include/rexy/compat/cpp20/string_base.hpp
View File

@@ -24,11 +24,71 @@
#include <utility> //forward
#include <type_traits> //decay, is_nothrow_assignable
#include "../../concepts/string.hpp"
#include "../../utility.hpp" //strlen, strncmp
namespace rexy{
template<class Left, class Right>
class string_cat_expr;
template<class Char, REXY_ALLOCATOR_CONCEPT Alloc>
class basic_string;
template<class Char>
class basic_string_view;
template<class T>
struct is_basic_string{
template<class Char, class Alloc>
static std::true_type check(const basic_string<Char,Alloc>*);
static std::false_type check(...);
static constexpr bool value = decltype(check(std::declval<std::remove_cvref_t<T>*>()))::value;
};
template<class T>
struct is_basic_string_view{
template<class Char>
static std::true_type check(const basic_string_view<Char>*);
static std::false_type check(...);
static constexpr bool value = decltype(check(std::declval<std::remove_cvref_t<T>*>()))::value;
};
template<class T>
struct is_basic_string_expr{
template<class Left, class Right>
static std::true_type check(const string_cat_expr<Left,Right>*);
static std::false_type check(...);
static constexpr bool value = decltype(check(std::declval<std::remove_cvref_t<T>*>()))::value;
};
template<class T>
concept BasicString = requires(const T& a){
requires(is_basic_string<T>::value || is_basic_string_view<T>::value);
{std::as_const(a).length()} -> std::convertible_to<typename std::decay_t<T>::size_type>;
{std::as_const(a).c_str()} -> std::convertible_to<typename std::decay_t<T>::const_pointer>;
{std::as_const(a)[0]} -> std::convertible_to<typename std::decay_t<T>::const_reference>;
{std::as_const(a).begin()} -> std::convertible_to<typename std::decay_t<T>::const_iterator>;
{std::as_const(a).end()} -> std::convertible_to<typename std::decay_t<T>::const_iterator>;
};
template<class T>
concept StringExpr = is_basic_string_expr<T>::value;
template<class T>
concept String = BasicString<T> || StringExpr<T>;
template<class T>
struct is_string{
static constexpr bool value = BasicString<T>;
};
template<class T>
static constexpr bool is_string_v = is_string<T>::value;
template<class T>
struct is_string_expr{
static constexpr bool value = StringExpr<T>;
};
template<class T>
static constexpr bool is_string_expr_v = is_string_expr<T>::value;
//Compare
template<BasicString Str1, BasicString Str2>
constexpr bool operator==(Str1&& left, Str2&& right){