50 lines
969 B
C++
50 lines
969 B
C++
// SPDX-License-Identifier: BSD-2-Clause
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// author: Max Kellermann <max.kellermann@gmail.com>
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#pragma once
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#include <cstddef>
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/**
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* Simple OO wrapper for a const string pointer.
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*/
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template<typename T=char>
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class StringPointer {
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public:
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using value_type = T;
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using reference = T &;
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using const_reference = const T &;
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using pointer = T *;
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using const_pointer = const T *;
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static constexpr value_type SENTINEL = '\0';
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private:
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const_pointer value;
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public:
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StringPointer() = default;
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constexpr StringPointer(const_pointer _value) noexcept
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:value(_value) {}
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constexpr bool operator==(std::nullptr_t) const noexcept {
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return value == nullptr;
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}
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/**
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* Check if this is a "nulled" instance. A "nulled" instance
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* must not be used.
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*/
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constexpr bool IsNull() const noexcept {
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return value == nullptr;
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}
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constexpr const_pointer c_str() const noexcept {
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return value;
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}
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bool empty() const noexcept {
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return *value == SENTINEL;
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}
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};
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