vector.cpp

// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2020 Tobias Hienzsch
 
#include <etl/cassert.hpp>
 
#if defined(TETL_ENABLE_CXX_MODULES)
import etl;
#else
    #include <etl/vector.hpp>
#endif
 
struct Person {
    constexpr Person(int a, int e) noexcept
        : age{a}
        , experience{e}
    {
    }
 
    friend constexpr auto operator==(Person lhs, Person rhs) noexcept -> bool = default;
 
    int age{};
    int experience{};
};
 
auto main() -> int
{
    // Unlike a std::vector you will have to decide which maximum capacity you
    // need. Apart from that it behaves almost the same as the standard version.
    etl::static_vector<Person, 32> people{};
    assert(people.empty());
    assert(people.capacity() == 32);
 
    // You can push_back/emplace_back into the vector
    people.push_back(Person{20, 0});
    assert(people.size() == 1);
    assert(people.back().age == 20);
 
    people.emplace_back(90, 100);
    assert(people.size() == 2);
    assert(people.back().age == 90);
 
    // You can make copies.
    auto const copy = people;
 
    // You can compare vectors
    assert(copy == people);
 
    // You can apply algorithms.
    auto levelUp = [](auto p) {
        p.experience += 1;
        return p;
    };
 
    etl::transform(begin(people), end(people), begin(people), levelUp);
    assert(people[0].experience == 1);
    assert(people[1].experience == 101);
    assert(copy != people);
 
    return 0;
}