TartanLlama/expected
1
0
Fork 1
mirror of https://github.com/TartanLlama/expected.git synced 2025-08-01 01:44:30 +02:00
Code Issues Packages Projects Releases Wiki Activity

Add variadic constructors for tl::unexpected

Browse Source
This commit is contained in:
Sy Brand
2022-11-24 12:52:29 +00:00
parent 4621a489bf
commit 4e86bddee3
2 changed files with 32 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
include/tl/expected.hpp
View File

@@ -138,6 +138,19 @@ public:
constexpr explicit unexpected(E &&e) : m_val(std::move(e)) {}
template <class... Args, typename std::enable_if<std::is_constructible<
E, Args &&...>::value>::type * = nullptr>
constexpr explicit unexpected(Args &&...args)
: m_val(std::forward<Args>(args)...) {}
template <
class U, class... Args,
typename std::enable_if<std::is_constructible<
E, std::initializer_list<U> &, Args &&...>::value>::type * = nullptr>
constexpr explicit unexpected(std::initializer_list<U> l,
Args &&...args)
: m_val(l, std::forward<Args>(args)...) {}
constexpr const E &value() const & { return m_val; }
TL_EXPECTED_11_CONSTEXPR E &value() & { return m_val; }
TL_EXPECTED_11_CONSTEXPR E &&value() && { return std::move(m_val); }

21
tests/issues.cpp
View File

@@ -164,6 +164,23 @@ TEST_CASE("Issue 122", "[issues.122]") {
#ifdef __cpp_deduction_guides
TEST_CASE("Issue 89", "[issues.89]") {
auto s = tl::unexpected("Some string");
REQUIRE(s.value() == "Some string");
REQUIRE(s.value() == std::string("Some string"));
}
#endif
#endif
struct S {
int i = 0;
int j = 0;
S(int i) : i(i) {}
S(int i, int j) : i(i), j(j) {}
};
TEST_CASE("Issue 107", "[issues.107]") {
tl::expected<int, S> ex1(tl::unexpect, 2);
tl::expected<int, S> ex2(tl::unexpect, 2, 2);
REQUIRE(ex1.error().i == 2);
REQUIRE(ex1.error().j == 0);
REQUIRE(ex2.error().i == 2);
REQUIRE(ex2.error().j == 2);
}