86a500c846
* remove io::ostream dependency from CString.h + clang tidy * remove ostream.h dependency from Invocable.h * remove Panic.h dependency from FixedCapacityVector.h * remove ostream.h dependency from backend/ headers * clang tidy Panic.h/Panic.cpp
108 lines
3.7 KiB
C++
108 lines
3.7 KiB
C++
/*
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* Copyright (C) 2025 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TNT_UTILS_STATICSTRING_H
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#define TNT_UTILS_STATICSTRING_H
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#include <utils/compiler.h>
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#include <string_view>
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namespace utils {
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/**
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* @brief A lightweight string class that stores a pointer to a string literal and its size, without dynamic allocation.
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*
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* This class is designed to efficiently represent string literals. It does not allocate any memory
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* and instead relies on the compiler to manage the memory of the string literals.
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*/
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class UTILS_PUBLIC StaticString {
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public:
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using value_type = std::string_view::value_type;
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using const_pointer = std::string_view::const_pointer;
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using const_reference = std::string_view::const_reference;
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using size_type = std::string_view::size_type;
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using const_iterator = std::string_view::const_iterator;
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// Constructor from string literal
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template<unsigned int M>
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constexpr StaticString(const char (&str)[M]) noexcept : mString(str, M - 1) {} // NOLINT(*-explicit-constructor)
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constexpr StaticString() noexcept = default;
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constexpr const_pointer c_str() const noexcept { return mString.data(); }
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constexpr const_pointer data() const noexcept { return mString.data(); }
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constexpr size_type size() const noexcept { return mString.size(); }
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constexpr size_type length() const noexcept { return mString.size(); }
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constexpr bool empty() const noexcept { return mString.empty(); }
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constexpr const_iterator begin() const noexcept { return mString.begin(); }
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constexpr const_iterator end() const noexcept { return mString.end(); }
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constexpr const_iterator cbegin() const noexcept { return mString.begin(); }
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constexpr const_iterator cend() const noexcept { return mString.end(); }
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constexpr const_reference operator[](size_type const pos) const noexcept {
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return mString[pos];
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}
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constexpr const_reference at(size_type const pos) const {
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return mString[pos];
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}
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constexpr const_reference front() const noexcept {
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return mString.front();
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}
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constexpr const_reference back() const noexcept {
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return mString.back();
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}
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constexpr int compare(const StaticString& rhs) const noexcept {
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return mString.compare(rhs.mString);
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}
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private:
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std::string_view mString;
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friend constexpr bool operator==(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString == rhs.mString;
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}
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friend constexpr bool operator!=(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString != rhs.mString;
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}
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friend constexpr bool operator<(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString < rhs.mString;
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}
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friend constexpr bool operator>(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString > rhs.mString;
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}
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friend constexpr bool operator<=(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString <= rhs.mString;
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}
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friend constexpr bool operator>=(const StaticString& lhs, const StaticString& rhs) noexcept {
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return lhs.mString >= rhs.mString;
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}
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};
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} // namespace utils
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#endif // TNT_UTILS_STATICSTRING_H
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