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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.
98 lines
3.3 KiB
C++
98 lines
3.3 KiB
C++
/*
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* Copyright (c) 2018-2020, 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/ByteBuffer.h>
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#include <AK/Format.h>
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#include <AK/Forward.h>
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#include <AK/StringView.h>
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#include <stdarg.h>
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namespace AK {
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class StringBuilder {
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public:
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using OutputType = String;
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explicit StringBuilder(size_t initial_capacity = inline_capacity);
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~StringBuilder() = default;
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void append(const StringView&);
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void append(const Utf32View&);
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void append(char);
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void append_code_point(u32);
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void append(const char*, size_t);
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void appendf(const char*, ...) __attribute__((format(printf, 2, 3)));
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void appendvf(const char*, va_list);
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void append_escaped_for_json(const StringView&);
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template<typename... Parameters>
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void appendff(StringView fmtstr, const Parameters&... parameters)
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{
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vformat(*this, fmtstr, VariadicFormatParams { parameters... });
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}
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String build() const;
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String to_string() const;
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ByteBuffer to_byte_buffer() const;
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StringView string_view() const;
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void clear();
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size_t length() const { return m_length; }
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bool is_empty() const { return m_length == 0; }
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void trim(size_t count) { m_length -= count; }
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template<class SeparatorType, class CollectionType>
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void join(const SeparatorType& separator, const CollectionType& collection)
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{
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bool first = true;
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for (auto& item : collection) {
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if (first)
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first = false;
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else
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append(separator);
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append(item);
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}
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}
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private:
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void will_append(size_t);
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u8* data() { return m_buffer.is_null() ? m_inline_buffer : m_buffer.data(); }
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const u8* data() const { return m_buffer.is_null() ? m_inline_buffer : m_buffer.data(); }
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bool using_inline_buffer() const { return m_buffer.is_null(); }
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static constexpr size_t inline_capacity = 128;
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u8 m_inline_buffer[inline_capacity];
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ByteBuffer m_buffer;
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size_t m_length { 0 };
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};
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}
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using AK::StringBuilder;
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