#pragma once

//

// Copyright (C) 2023 LunarG, Inc.

//

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions

// are met:

//

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//    notice, this list of conditions and the following disclaimer.

//

//    Redistributions in binary form must reproduce the above

//    copyright notice, this list of conditions and the following

//    disclaimer in the documentation and/or other materials provided

//    with the distribution.

//

//    Neither the name of 3Dlabs Inc. Ltd. nor the names of its

//    contributors may be used to endorse or promote products derived

//    from this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS

// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

// COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,

// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,

// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

//

// Partial implementation of std::span for C++11

// Replace with std::span if repo standard is bumped to C++20

//

// This code was copied from https://github.com/KhronosGroup/Vulkan-ValidationLayers/blob/main/layers/containers/custom_containers.h

template <typename T>

class span {

  public:

    using pointer = T *;

    using const_pointer = T const *;

    using iterator = pointer;

    using const_iterator = const_pointer;

    span() = default;

    span(pointer start, size_t n) : data_(start), count_(n) {}

    template <typename Iterator>

    span(Iterator start, Iterator end) : data_(&(*start)), count_(end - start) {}

    template <typename Container>

    span(Container &c) : data_(c.data()), count_(c.size()) {}

Initialize.cpp:span<glslang::(anonymous namespace)::Versioning const>::span<std::__1::array<glslang::(anonymous namespace)::Versioning, 2ul> const>(std::__1::array<glslang::(anonymous namespace)::Versioning, 2ul> const&)

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68

    span(Container &c) : data_(c.data()), count_(c.size()) {}

Initialize.cpp:span<glslang::(anonymous namespace)::BuiltInFunction const>::span<std::__1::array<glslang::(anonymous namespace)::BuiltInFunction, 79ul> const>(std::__1::array<glslang::(anonymous namespace)::BuiltInFunction, 79ul> const&)

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46

    span(Container &c) : data_(c.data()), count_(c.size()) {}

Initialize.cpp:span<glslang::(anonymous namespace)::BuiltInFunction const>::span<std::__1::array<glslang::(anonymous namespace)::BuiltInFunction, 3ul> const>(std::__1::array<glslang::(anonymous namespace)::BuiltInFunction, 3ul> const&)

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55

53

    span(Container &c) : data_(c.data()), count_(c.size()) {}

    iterator begin() { return data_; }

    const_iterator begin() const { return data_; }

Initialize.cpp:span<glslang::(anonymous namespace)::BuiltInFunction const>::begin() const

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58

99

    const_iterator begin() const { return data_; }

Initialize.cpp:span<glslang::(anonymous namespace)::Versioning const>::begin() const

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1.56k

    const_iterator begin() const { return data_; }

    iterator end() { return data_ + count_; }

    const_iterator end() const { return data_ + count_; }

Initialize.cpp:span<glslang::(anonymous namespace)::BuiltInFunction const>::end() const

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61

99

    const_iterator end() const { return data_ + count_; }

Initialize.cpp:span<glslang::(anonymous namespace)::Versioning const>::end() const

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1.56k

    const_iterator end() const { return data_ + count_; }

    T &operator[](int i) { return data_[i]; }

    const T &operator[](int i) const { return data_[i]; }

    T &front() { return *data_; }

    const T &front() const { return *data_; }

    T &back() { return *(data_ + (count_ - 1)); }

    const T &back() const { return *(data_ + (count_ - 1)); }

    size_t size() const { return count_; }

    bool empty() const { return count_ == 0; }

    pointer data() { return data_; }

    const_pointer data() const { return data_; }

  private:

    pointer data_ = {};

    size_t count_ = 0;

};

//

// Allow type inference that using the constructor doesn't allow in C++11

template <typename T>

span<T> make_span(T *begin, size_t count) {

    return span<T>(begin, count);

}

template <typename T>

span<T> make_span(T *begin, T *end) {

    return make_span<T>(begin, end);

}