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Support GCC 4.9

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This commit is contained in:
Simon Brand
2017-10-21 22:21:49 +01:00
parent 921db962ec
commit 310c5220e6
4 changed files with 22 additions and 21 deletions
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2
README.md
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@ -76,6 +76,7 @@ Tested on:
* clang 3.7
* clang 3.6
* g++ 5.0
* g++ 4.9
- Appveyor continuous integration
* MSVC 2015
* MSVC 2017
@ -85,7 +86,6 @@ Tested on:
Unsupported, but planning to support:
- g++ 4.9
- g++ 4.8

33
optional.hpp
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@ -17,7 +17,15 @@
#include <type_traits>
#include <utility>
#if __cplusplus == 201103L || (defined(_MSC_VER) && _MSC_VER == 1900)
#if (defined(_MSC_VER) && _MSC_VER == 1900)
#define TL_OPTIONAL_MSVC2015
#endif
#if (defined(__GNUC__) && __GNUC__ == 4 && __GNUC_MINOR__ <= 9)
#define TL_OPTIONAL_GCC49
#endif
#if __cplusplus == 201103L || defined(TL_OPTIONAL_MSVC2015) || defined(TL_OPTIONAL_GCC49)
/// \exclude
#define TL_OPTIONAL_11_CONSTEXPR
#else
@ -25,13 +33,6 @@
#define TL_OPTIONAL_11_CONSTEXPR constexpr
#endif
#if defined(_MSC_VER) && _MSC_VER == 1900
/// \exclude
#define TL_OPTIONAL_MSVC_2015_CONSTEXPR
#else
/// \exclude
#define TL_OPTIONAL_MSVC_2015_CONSTEXPR constexpr
#endif
namespace tl {
/// \brief Used to represent an optional with no data; essentially a bool
@ -257,10 +258,10 @@ struct is_nothrow_swappable
template <class T, bool = ::std::is_trivially_destructible<T>::value>
struct optional_storage_base {
TL_OPTIONAL_MSVC_2015_CONSTEXPR optional_storage_base() noexcept : m_dummy(), m_has_value(false) {}
TL_OPTIONAL_11_CONSTEXPR optional_storage_base() noexcept : m_dummy(), m_has_value(false) {}
template <class... U>
TL_OPTIONAL_MSVC_2015_CONSTEXPR optional_storage_base(in_place_t, U &&... u) noexcept
TL_OPTIONAL_11_CONSTEXPR optional_storage_base(in_place_t, U &&... u) noexcept
: m_value(std::forward<U>(u)...), m_has_value(true) {}
~optional_storage_base() {
@ -280,11 +281,11 @@ struct optional_storage_base {
};
template <class T> struct optional_storage_base<T, true> {
TL_OPTIONAL_MSVC_2015_CONSTEXPR optional_storage_base() noexcept
TL_OPTIONAL_11_CONSTEXPR optional_storage_base() noexcept
: m_dummy(), m_has_value(false) {}
template <class... U>
TL_OPTIONAL_MSVC_2015_CONSTEXPR optional_storage_base(in_place_t,
TL_OPTIONAL_11_CONSTEXPR optional_storage_base(in_place_t,
U &&... u) noexcept
: m_value(std::forward<U>(u)...), m_has_value(true) {}
@ -560,7 +561,7 @@ public:
/// \group or_else
/// \synopsis template <class F> optional<T> or_else (F &&f) &;
template <class F, detail::enable_if_ret_void<F> * = nullptr>
optional<T> TL_OPTIONAL_MSVC_2015_CONSTEXPR or_else(F &&f) & {
optional<T> TL_OPTIONAL_11_CONSTEXPR or_else(F &&f) & {
if (has_value())
return *this;
@ -570,7 +571,7 @@ public:
/// \exclude
template <class F, detail::disable_if_ret_void<F> * = nullptr>
optional<T> TL_OPTIONAL_MSVC_2015_CONSTEXPR or_else(F &&f) & {
optional<T> TL_OPTIONAL_11_CONSTEXPR or_else(F &&f) & {
return has_value() ? *this : std::forward<F>(f)();
}
@ -587,7 +588,7 @@ public:
/// \exclude
template <class F, detail::disable_if_ret_void<F> * = nullptr>
optional<T> TL_OPTIONAL_MSVC_2015_CONSTEXPR or_else(F &&f) && {
optional<T> TL_OPTIONAL_11_CONSTEXPR or_else(F &&f) && {
return has_value() ? std::move(*this) : std::forward<F>(f)();
}
@ -604,7 +605,7 @@ public:
/// \exclude
template <class F, detail::disable_if_ret_void<F> * = nullptr>
optional<T> TL_OPTIONAL_MSVC_2015_CONSTEXPR or_else(F &&f) const & {
optional<T> TL_OPTIONAL_11_CONSTEXPR or_else(F &&f) const & {
return has_value() ? *this : std::forward<F>(f)();
}

2
tests/constexpr.cpp
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@ -8,7 +8,7 @@
REQUIRE(e);
TEST_CASE("Constexpr", "[constexpr]") {
#if !(_MSC_VER == 1900)
#if !defined(TL_OPTIONAL_MSVC2015) && !defined(TL_OPTIONAL_GCC49)
SECTION("empty construct") {
constexpr tl::optional<int> o2{};
constexpr tl::optional<int> o3 = {};

6
tests/extensions.cpp
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@ -9,7 +9,7 @@
REQUIRE(e);
constexpr int get_int(int) { return 42; }
TL_OPTIONAL_MSVC_2015_CONSTEXPR tl::optional<int> get_opt_int(int) { return 42; }
TL_OPTIONAL_11_CONSTEXPR tl::optional<int> get_opt_int(int) { return 42; }
// What is Clang Format up to?!
TEST_CASE("Monadic operations",
@ -193,7 +193,7 @@ REQUIRE(!o39r);
}
SECTION("map constexpr") {
#ifndef _MSC_VER
#if !defined(_MSC_VER) && !defined(TL_OPTIONAL_GCC49)
// test each overload in turn
constexpr tl::optional<int> o16 = 42;
constexpr auto o16r = o16.map(get_int);
@ -320,7 +320,7 @@ SECTION("and_then") {
}
SECTION("constexpr and_then") {
#ifndef _MSC_VER
#if !defined(_MSC_VER) && !defined(TL_OPTIONAL_GCC49)
constexpr tl::optional<int> o10 = 42;
constexpr auto o10r = o10.and_then(get_opt_int);
REQUIRE(*o10r == 42);