mp-units/test/unit_test/static/angle_test.cpp

// The MIT License (MIT)
//
// Copyright (c) 2018 Mateusz Pusz
//
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// furnished to do so, subject to the following conditions:
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#include <mp_units/generic/angle.h>
#include <mp_units/generic/solid_angle.h>
#include <numbers>

namespace {

// plane angle

using namespace mp_units::references;
using namespace mp_units::literals;

static_assert(360 * deg == 1 * rev);
static_assert(400 * grad == 1 * rev);
static_assert(std::numbers::pi * 2 * rad == 1. * rev);

static_assert(360_q_deg == 1_q_rev);
static_assert(400_q_grad == 1_q_rev);
static_assert(std::numbers::pi * value_cast<double>(2._q_rad) == value_cast<double>(1._q_rev));

static_assert(mp_units::aliases::deg<>(360.) == mp_units::aliases::rev<>(1.));
static_assert(mp_units::aliases::deg<int>(360) == mp_units::aliases::rev<int>(1));
static_assert(mp_units::aliases::grad<int>(400) == mp_units::aliases::rev<int>(1));
static_assert(std::numbers::pi * mp_units::aliases::rad<>(2.) == mp_units::aliases::rev<>(1.));

// solid angle

static_assert(1_q_rad * 1_q_rad == 1_q_sr);
static_assert(1_q_deg * 1_q_deg == 1_q_deg2);

}  // namespace