From cbe7bde952b4ed5d910e9a152f953ba172c5f654 Mon Sep 17 00:00:00 2001 From: Klaus Aehlig Date: Mon, 14 Aug 2023 12:13:05 +0200 Subject: expression: add new built in "reverse" While a foldl is enough to implement a reverse functionality, adding it as a built in allows doing so in linear time. --- .../buildtool/build_engine/expression/expression.test.cpp | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'test/buildtool/build_engine/expression/expression.test.cpp') diff --git a/test/buildtool/build_engine/expression/expression.test.cpp b/test/buildtool/build_engine/expression/expression.test.cpp index 7f3df7c5..242c0f4a 100644 --- a/test/buildtool/build_engine/expression/expression.test.cpp +++ b/test/buildtool/build_engine/expression/expression.test.cpp @@ -942,6 +942,21 @@ TEST_CASE("Expression Evaluation", "[expression]") { // NOLINT )"_json)); } + SECTION("reverse expression") { + auto expr = Expression::FromJson(R"( + { "type": "reverse" + , "$1": ["foo", "bar", "baz"] + } + )"_json); + REQUIRE(expr); + + auto result = expr.Evaluate(env, fcts); + REQUIRE(result); + CHECK(result == Expression::FromJson(R"( + ["baz", "bar", "foo"] + )"_json)); + } + SECTION("keys expression") { auto expr = Expression::FromJson(R"( { "type": "keys" -- cgit v1.2.3