Merge pull request #163 from Spartan322/improve-binding

1 files changed, 106 insertions, 0 deletions

diff --git a/extension/src/openvic-extension/utility/StringLiteral.hpp b/extension/src/openvic-extension/utility/StringLiteral.hpp
new file mode 100644
index 0000000..90b18cd
--- /dev/null
+++ b/extension/src/openvic-extension/utility/StringLiteral.hpp
@@ -0,0 +1,106 @@
+#pragma once
+
+#include <algorithm>
+#include <cassert>
+#include <cstddef>
+#include <iterator>
+#include <string_view>
+#include <type_traits>
+
+namespace OpenVic {
+	template<std::size_t N>
+	struct StringLiteral {
+		constexpr StringLiteral(const char (&str)[N]) {
+			std::copy_n(str, N, value);
+		}
+
+		consteval StringLiteral(std::string_view string) {
+			assert(string.size() == N);
+			std::copy_n(string.begin(), N, value);
+		}
+
+		char value[N];
+		static const constexpr std::integral_constant<std::size_t, N - 1> size {};
+
+		struct iterator {
+			using iterator_concept [[maybe_unused]] = std::contiguous_iterator_tag;
+			using difference_type = std::ptrdiff_t;
+			using element_type = const char; // element_type is a reserved name that must be used in the definition
+			using pointer = element_type*;
+			using reference = element_type&;
+
+			constexpr iterator() = default;
+			constexpr iterator(pointer p) : _ptr(p) {}
+			constexpr reference operator*() const {
+				return *_ptr;
+			}
+			constexpr pointer operator->() const {
+				return _ptr;
+			}
+			constexpr auto& operator++() {
+				_ptr++;
+				return *this;
+			}
+			constexpr auto operator++(int) {
+				auto tmp = *this;
+				++(*this);
+				return tmp;
+			}
+			constexpr iterator& operator+=(int i) {
+				_ptr += i;
+				return *this;
+			}
+			constexpr iterator operator+(const difference_type other) const {
+				return _ptr + other;
+			}
+			constexpr friend iterator operator+(const difference_type value, const iterator& other) {
+				return other + value;
+			}
+			constexpr iterator& operator--() {
+				_ptr--;
+				return *this;
+			}
+			constexpr iterator operator--(int) {
+				iterator tmp = *this;
+				--(*this);
+				return tmp;
+			}
+			constexpr iterator& operator-=(int i) {
+				_ptr -= i;
+				return *this;
+			}
+			constexpr difference_type operator-(const iterator& other) const {
+				return _ptr - other._ptr;
+			}
+			constexpr iterator operator-(const difference_type other) const {
+				return _ptr - other;
+			}
+			friend iterator operator-(const difference_type value, const iterator& other) {
+				return other - value;
+			}
+			constexpr reference operator[](difference_type idx) const {
+				return _ptr[idx];
+			}
+			constexpr auto operator<=>(const iterator&) const = default; // three-way comparison C++20
+
+		private:
+			pointer _ptr;
+		};
+
+		constexpr iterator begin() const {
+			return iterator { &value };
+		}
+
+		constexpr iterator end() const {
+			return iterator { &value + N };
+		}
+
+		constexpr operator std::string_view() const {
+			return std::string_view { value, N };
+		}
+
+		constexpr decltype(auto) data() const {
+			return static_cast<std::string_view>(*this).data();
+		}
+	};
+}