value_testable.hpp

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//=======================================================================
// Copyright (c) 2014-2023 Baptiste Wicht
// Distributed under the terms of the MIT License.
// (See accompanying file LICENSE or copy at
//  http://opensource.org/licenses/MIT)
//=======================================================================

#pragma once

namespace etl {

template <typename E>
bool is_diagonal(E&& expr);

template <typename D>
struct value_testable {
    using derived_t = D; 

    derived_t& as_derived() noexcept {
        return *static_cast<derived_t*>(this);
    }

    const derived_t& as_derived() const noexcept {
        return *static_cast<const derived_t*>(this);
    }

    bool is_finite() const noexcept {
        return std::all_of(as_derived().begin(), as_derived().end(), static_cast<bool (*)(value_t<derived_t>)>(std::isfinite));
    }

    bool is_zero() const noexcept {
        return std::all_of(as_derived().begin(), as_derived().end(), [](value_t<derived_t> v) { return v == value_t<derived_t>(0); });
    }

    bool is_diagonal() const noexcept {
        return etl::is_diagonal(as_derived());
    }

    bool is_uniform() const noexcept {
        return etl::is_uniform(as_derived());
    }
};

} //end of namespace etl