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Support mapping functions which return references

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This commit is contained in:
Simon Brand
2017-12-05 19:51:20 +00:00
parent 5a3f094ec7
commit 247677394f
2 changed files with 9 additions and 3 deletions
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6
tests/extensions.cpp
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@@ -119,6 +119,12 @@ TEST_CASE("Monadic operations", "[monadic]") {
const tl::optional<int> o37 = tl::nullopt;
auto o37r = std::move(o37).map([](int) { return; });
REQUIRE(!o37r);
// callable which returns a reference
tl::optional<int> o38 = 42;
auto o38r = o38.map([](int& i) -> const int& { return i; });
REQUIRE(o38r);
REQUIRE(*o38r == 42);
}
SECTION("map constexpr") {