Add 'tomlplusplus/' from commit '1c8b7466e4946fcc3bf20484c0e1d001202cca5a'

git-subtree-dir: tomlplusplus
git-subtree-mainline: b85e90fc3480da0e6a48da73201a0b22488cc650
git-subtree-split: 1c8b7466e4946fcc3bf20484c0e1d001202cca5a

1 files changed, 52 insertions, 0 deletions

diff --git a/tomlplusplus/tests/using_iterators.cpp b/tomlplusplus/tests/using_iterators.cpp
new file mode 100644
index 0000000000..cbc4bbe636
--- /dev/null
+++ b/tomlplusplus/tests/using_iterators.cpp
@@ -0,0 +1,52 @@
+#include "tests.hpp"
+
+TOML_DISABLE_WARNINGS;
+#include <algorithm>
+TOML_ENABLE_WARNINGS;
+
+TEST_CASE("using iterators")
+{
+	constexpr auto data = R"(array=[1,"Foo",true]
+string="Bar"
+number=5)"sv;
+	parsing_should_succeed(
+		FILE_LINE_ARGS,
+		data,
+		[](auto&& tbl)
+		{
+			const auto tbl_begin = tbl.begin();
+			const auto tbl_end	 = tbl.end();
+
+			auto count_table_lambda = [tbl_begin, tbl_end](node_type type) noexcept {
+				return std::count_if(tbl_begin,
+									 tbl_end,
+									 [type](const auto& pair) noexcept { return pair.second.type() == type; });
+			};
+
+			CHECK(std::distance(tbl_begin, tbl_end) == 3);
+			CHECK(count_table_lambda(node_type::table) == 0);
+			CHECK(count_table_lambda(node_type::integer) == 1);
+			CHECK(count_table_lambda(node_type::string) == 1);
+			CHECK(std::next(tbl_begin, 3) == tbl_end);
+
+			const auto arr_iter =
+				std::find_if(tbl_begin, tbl_end, [](const auto& pair) noexcept { return pair.second.is_array(); });
+
+			REQUIRE(arr_iter != tbl_end);
+			const auto& arr		 = arr_iter->second.as_array();
+			const auto arr_begin = arr->begin();
+			const auto arr_end	 = arr->end();
+
+			auto count_array_lambda = [arr_begin, arr_end](node_type type) noexcept {
+				return std::count_if(arr_begin,
+									 arr_end,
+									 [type](const auto& node) noexcept { return node.type() == type; });
+			};
+
+			CHECK(std::distance(arr_begin, arr_end) == 3);
+			CHECK(count_array_lambda(node_type::table) == 0);
+			CHECK(count_array_lambda(node_type::integer) == 1);
+			CHECK(count_array_lambda(node_type::string) == 1);
+			CHECK(std::next(arr_begin, 2) != arr_end);
+		});
+}