tomlplusplus/tests/for_each.cpp

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// This file is a part of toml++ and is subject to the the terms of the MIT license.
// Copyright (c) Mark Gillard <mark.gillard@outlook.com.au>
// See https://github.com/marzer/tomlplusplus/blob/master/LICENSE for the full license text.
// SPDX-License-Identifier: MIT
#include "tests.h"
TOML_DISABLE_SPAM_WARNINGS;
TEST_CASE("array::for_each")
{
toml::array arr{ 0, 1, 2, 3.0, "four", "five", 6 };
// check lvalue propagates correctly
static_cast<array&>(arr).for_each(
[](auto&& elem, size_t) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<array&>(arr).for_each(
[](size_t, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<array&>(arr).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check rvalue propagates correctly
static_cast<array&&>(arr).for_each(
[](auto&& elem, size_t) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<array&&>(arr).for_each(
[](size_t, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<array&&>(arr).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check const lvalue propagates correctly
static_cast<const array&>(arr).for_each(
[](auto&& elem, size_t) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const array&>(arr).for_each(
[](size_t, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const array&>(arr).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check const rvalue propagates correctly
static_cast<const array&&>(arr).for_each(
[](auto&& elem, size_t) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const array&&>(arr).for_each(
[](size_t, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const array&&>(arr).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check noexcept - func(elem, i)
{
static constexpr auto throwing_visitor = [](auto&&, size_t) noexcept(false) {};
static constexpr auto non_throwing_visitor = [](auto&&, size_t) noexcept(true) {};
static_assert(!noexcept(static_cast<array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<array&&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&&>(arr).for_each(throwing_visitor)));
static_assert(noexcept(static_cast<array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<array&&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&&>(arr).for_each(non_throwing_visitor)));
}
// check noexcept - func(i, elem)
{
static constexpr auto throwing_visitor = [](size_t, auto&&) noexcept(false) {};
static constexpr auto non_throwing_visitor = [](size_t, auto&&) noexcept(true) {};
static_assert(!noexcept(static_cast<array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<array&&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&&>(arr).for_each(throwing_visitor)));
static_assert(noexcept(static_cast<array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<array&&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&&>(arr).for_each(non_throwing_visitor)));
}
// check noexcept - func(elem)
{
static constexpr auto throwing_visitor = [](auto&&) noexcept(false) {};
static constexpr auto non_throwing_visitor = [](auto&&) noexcept(true) {};
static_assert(!noexcept(static_cast<array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<array&&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&>(arr).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const array&&>(arr).for_each(throwing_visitor)));
static_assert(noexcept(static_cast<array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<array&&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&>(arr).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const array&&>(arr).for_each(non_throwing_visitor)));
}
// check that the iteration actually does what it says on the box
{
toml::array arr2;
arr.for_each([&](const auto& val) { arr2.push_back(val); });
CHECK(arr == arr2);
}
// check that visitation works for a specific type
{
toml::array arr2;
arr.for_each([&](const toml::value<int64_t>& val) { arr2.push_back(val); });
CHECK(arr2 == toml::array{ 0, 1, 2, 6 });
}
// check that early-stopping works
{
toml::array arr2;
arr.for_each(
[&](const auto& val)
{
if constexpr (!toml::is_number<decltype(val)>)
return false;
else
{
arr2.push_back(val);
return true;
}
});
CHECK(arr2 == toml::array{ 0, 1, 2, 3.0 });
}
}
TEST_CASE("table::for_each")
{
table tbl{ { "zero", 0 }, //
{ "one", 1 }, //
{ "two", 2 }, //
{ "three", 3.0 }, //
{ "four", "four" }, //
{ "five", "five" }, //
{ "six", 6 } };
// check lvalue propagates correctly
static_cast<table&>(tbl).for_each(
[](const toml::key&, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<table&>(tbl).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check rvalue propagates correctly
static_cast<table&&>(tbl).for_each(
[](const toml::key&, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<table&&>(tbl).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(!std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check const lvalue propagates correctly
static_cast<const table&>(tbl).for_each(
[](const toml::key&, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const table&>(tbl).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_lvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check const rvalue propagates correctly
static_cast<const table&&>(tbl).for_each(
[](const toml::key&, auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
static_cast<const table&&>(tbl).for_each(
[](auto&& elem) noexcept
{
using elem_ref_type = decltype(elem);
static_assert(std::is_rvalue_reference_v<elem_ref_type>);
using elem_type = std::remove_reference_t<elem_ref_type>;
static_assert(std::is_const_v<elem_type>);
static_assert(!std::is_volatile_v<elem_type>);
});
// check noexcept - func(key, value)
{
static constexpr auto throwing_visitor = [](const toml::key&, auto&&) noexcept(false) {};
static constexpr auto non_throwing_visitor = [](const toml::key&, auto&&) noexcept(true) {};
static_assert(!noexcept(static_cast<table&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<table&&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const table&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const table&&>(tbl).for_each(throwing_visitor)));
static_assert(noexcept(static_cast<table&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<table&&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const table&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const table&&>(tbl).for_each(non_throwing_visitor)));
}
// check noexcept - func(value)
{
static constexpr auto throwing_visitor = [](auto&&) noexcept(false) {};
static constexpr auto non_throwing_visitor = [](auto&&) noexcept(true) {};
static_assert(!noexcept(static_cast<table&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<table&&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const table&>(tbl).for_each(throwing_visitor)));
static_assert(!noexcept(static_cast<const table&&>(tbl).for_each(throwing_visitor)));
static_assert(noexcept(static_cast<table&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<table&&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const table&>(tbl).for_each(non_throwing_visitor)));
static_assert(noexcept(static_cast<const table&&>(tbl).for_each(non_throwing_visitor)));
}
// check that the iteration actually does what it says on the box
{
toml::table tbl2;
tbl.for_each([&](auto&& key, auto&& val) { tbl2.insert_or_assign(key, val); });
CHECK(tbl == tbl2);
}
// check that visitation works for a specific type
{
toml::table tbl2;
tbl.for_each([&](auto&& key, const toml::value<int64_t>& val) { tbl2.insert_or_assign(key, val); });
CHECK(tbl2
== table{ { "zero", 0 }, //
{ "one", 1 }, //
{ "two", 2 }, //
{ "six", 6 } });
}
// check that early-stopping works
{
toml::table tbl2;
size_t added{};
tbl.for_each(
[&](auto&& key, const auto& val)
{
tbl2.insert_or_assign(key, val);
added++;
return added < 3u;
});
CHECK(tbl2.size() == 3u);
}
}