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https://github.com/LadybirdBrowser/ladybird.git
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e6f907a155
Problem:
- Many constructors are defined as `{}` rather than using the ` =
default` compiler-provided constructor.
- Some types provide an implicit conversion operator from `nullptr_t`
instead of requiring the caller to default construct. This violates
the C++ Core Guidelines suggestion to declare single-argument
constructors explicit
(https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c46-by-default-declare-single-argument-constructors-explicit).
Solution:
- Change default constructors to use the compiler-provided default
constructor.
- Remove implicit conversion operators from `nullptr_t` and change
usage to enforce type consistency without conversion.
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/String.h>
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namespace AK {
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class FlyString {
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public:
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FlyString() = default;
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FlyString(const FlyString& other)
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: m_impl(other.impl())
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{
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}
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FlyString(FlyString&& other)
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: m_impl(move(other.m_impl))
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{
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}
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FlyString(const String&);
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FlyString(const StringView&);
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FlyString(const char*);
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FlyString& operator=(const FlyString& other)
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{
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m_impl = other.m_impl;
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return *this;
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}
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FlyString& operator=(FlyString&& other)
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{
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m_impl = move(other.m_impl);
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return *this;
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}
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bool is_empty() const { return !m_impl || !m_impl->length(); }
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bool is_null() const { return !m_impl; }
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bool operator==(const FlyString& other) const { return m_impl == other.m_impl; }
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bool operator!=(const FlyString& other) const { return m_impl != other.m_impl; }
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bool operator==(const String&) const;
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bool operator!=(const String& string) const { return !(*this == string); }
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bool operator==(const StringView&) const;
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bool operator!=(const StringView& string) const { return !(*this == string); }
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bool operator==(const char*) const;
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bool operator!=(const char* string) const { return !(*this == string); }
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const StringImpl* impl() const { return m_impl; }
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const char* characters() const { return m_impl ? m_impl->characters() : nullptr; }
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size_t length() const { return m_impl ? m_impl->length() : 0; }
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ALWAYS_INLINE u32 hash() const { return m_impl ? m_impl->existing_hash() : 0; }
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StringView view() const;
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FlyString to_lowercase() const;
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template<typename T = int>
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Optional<T> to_int() const;
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template<typename T = unsigned>
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Optional<T> to_uint() const;
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bool equals_ignoring_case(const StringView&) const;
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bool starts_with(const StringView&, CaseSensitivity = CaseSensitivity::CaseSensitive) const;
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bool ends_with(const StringView&, CaseSensitivity = CaseSensitivity::CaseSensitive) const;
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static void did_destroy_impl(Badge<StringImpl>, StringImpl&);
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template<typename T, typename... Rest>
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bool is_one_of(const T& string, Rest... rest) const
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{
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if (*this == string)
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return true;
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return is_one_of(rest...);
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}
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private:
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bool is_one_of() const { return false; }
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RefPtr<StringImpl> m_impl;
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};
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template<>
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struct Traits<FlyString> : public GenericTraits<FlyString> {
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static unsigned hash(const FlyString& s) { return s.hash(); }
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};
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}
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using AK::FlyString;
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