eb3551d0a3
This roll includes: - [inspector_protocol] Introduce protocol::Serializable [1] [1] https://codereview.chromium.org/2526603002 BUG=chromium:350797 R=dgozman@chromium.org Review-Url: https://codereview.chromium.org/2523583005 Cr-Commit-Position: refs/heads/master@{#41197}
87 lines
2.6 KiB
Plaintext
87 lines
2.6 KiB
Plaintext
// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef {{"_".join(config.protocol.namespace)}}_Maybe_h
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#define {{"_".join(config.protocol.namespace)}}_Maybe_h
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//#include "Forward.h"
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{% for namespace in config.protocol.namespace %}
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namespace {{namespace}} {
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{% endfor %}
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template<typename T>
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class Maybe {
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public:
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Maybe() : m_value() { }
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Maybe(std::unique_ptr<T> value) : m_value(std::move(value)) { }
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Maybe(Maybe&& other) : m_value(std::move(other.m_value)) { }
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void operator=(std::unique_ptr<T> value) { m_value = std::move(value); }
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T* fromJust() const { DCHECK(m_value); return m_value.get(); }
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T* fromMaybe(T* defaultValue) const { return m_value ? m_value.get() : defaultValue; }
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bool isJust() const { return !!m_value; }
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std::unique_ptr<T> takeJust() { DCHECK(m_value); return std::move(m_value); }
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private:
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std::unique_ptr<T> m_value;
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};
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template<typename T>
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class MaybeBase {
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public:
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MaybeBase() : m_isJust(false) { }
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MaybeBase(T value) : m_isJust(true), m_value(value) { }
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MaybeBase(MaybeBase&& other) : m_isJust(other.m_isJust), m_value(std::move(other.m_value)) { }
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void operator=(T value) { m_value = value; m_isJust = true; }
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T fromJust() const { DCHECK(m_isJust); return m_value; }
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T fromMaybe(const T& defaultValue) const { return m_isJust ? m_value : defaultValue; }
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bool isJust() const { return m_isJust; }
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T takeJust() { DCHECK(m_isJust); return m_value; }
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protected:
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bool m_isJust;
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T m_value;
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};
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template<>
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class Maybe<bool> : public MaybeBase<bool> {
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public:
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Maybe() { }
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Maybe(bool value) : MaybeBase(value) { }
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Maybe(Maybe&& other) : MaybeBase(std::move(other)) { }
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using MaybeBase::operator=;
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};
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template<>
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class Maybe<int> : public MaybeBase<int> {
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public:
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Maybe() { }
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Maybe(int value) : MaybeBase(value) { }
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Maybe(Maybe&& other) : MaybeBase(std::move(other)) { }
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using MaybeBase::operator=;
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};
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template<>
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class Maybe<double> : public MaybeBase<double> {
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public:
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Maybe() { }
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Maybe(double value) : MaybeBase(value) { }
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Maybe(Maybe&& other) : MaybeBase(std::move(other)) { }
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using MaybeBase::operator=;
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};
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template<>
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class Maybe<String> : public MaybeBase<String> {
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public:
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Maybe() { }
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Maybe(const String& value) : MaybeBase(value) { }
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Maybe(Maybe&& other) : MaybeBase(std::move(other)) { }
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using MaybeBase::operator=;
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};
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{% for namespace in config.protocol.namespace %}
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} // namespace {{namespace}}
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{% endfor %}
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#endif // !defined({{"_".join(config.protocol.namespace)}}_Maybe_h)
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