89 lines
1.9 KiB
C++
89 lines
1.9 KiB
C++
#pragma once
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#include <std/fwd/string.hpp>
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#include <cstddef>
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#include <vector>
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namespace std {
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class string {
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std::vector<char> characters;
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public:
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static const size_t npos = (size_t)-1;
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constexpr string() : characters({'\0'}) {}
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constexpr string(const string &other)
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: characters(other.characters) {}
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constexpr string(string &&other) noexcept
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: characters(std::move(other.characters)) {}
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constexpr string(const char *s) {
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size_t count = 0;
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while (s[count] != '\0')
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++count;
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characters.resize(count + 1);
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for (size_t i = 0; i <= count; ++i)
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characters[i] = s[i];
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}
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constexpr ~string() {}
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constexpr string &operator =(const string &str) {
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characters = str.characters;
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return *this;
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}
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constexpr string &operator =(string &&str) noexcept {
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characters = std::move(str.characters);
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return *this;
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}
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constexpr size_t size() const noexcept {
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return characters.size() - 1;
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}
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constexpr void resize(size_t count) {
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if (count < characters.size() - 1) {
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characters.resize(count + 1);
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characters[count] = '\0';
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}
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else if (count > characters.size() - 1)
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characters.resize(count + 1);
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}
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constexpr void clear() noexcept {
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resize(0);
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}
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constexpr const char *data() const noexcept {
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return characters.data();
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}
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constexpr char *data() noexcept {
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return characters.data();
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}
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constexpr char &operator[](size_t pos) {
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return characters[pos];
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}
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constexpr const char &operator[](size_t pos) const {
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return characters[pos];
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}
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constexpr string &erase(size_t index = 0, size_t count = npos) {
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count = std::min(count, size() - index);
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for (size_t i = index; i + count < size(); ++i)
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characters[i] = characters[i + count];
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resize(size() - count);
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return *this;
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}
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};
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}
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