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add value_holder comparison and i/o

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bolero-MURAKAMI 2018-05-19 18:02:55 +09:00
parent 4dd6a25354
commit 44f16918b7
7 changed files with 258 additions and 12 deletions
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31
sprout/utility/value_holder/value_holder.hpp
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@ -1,5 +1,5 @@
/*=============================================================================
Copyright (c) 2011-2017 Bolero MURAKAMI
Copyright (c) 2011-2016 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
@ -11,12 +11,14 @@
#include <type_traits>
#include <initializer_list>
#include <sprout/config.hpp>
#include <sprout/workaround/std/cstddef.hpp>
#include <sprout/memory/addressof.hpp>
#include <sprout/utility/swap.hpp>
#include <sprout/utility/forward.hpp>
#include <sprout/utility/move.hpp>
#include <sprout/type_traits/is_constructible.hpp>
#include <sprout/optional/in_place.hpp>
#include <sprout/optional/exceptions.hpp>
namespace sprout {
namespace detail {
@ -44,10 +46,10 @@ namespace sprout {
static SPROUT_CONSTEXPR holder_type&& hold(movable_param_type p) SPROUT_NOEXCEPT {
return sprout::move(p);
}
static SPROUT_CONSTEXPR reference ref(holder_type& r) {
static SPROUT_CONSTEXPR reference ref(holder_type& r) SPROUT_NOEXCEPT {
return r;
}
static SPROUT_CONSTEXPR const_reference ref(holder_type const& r) {
static SPROUT_CONSTEXPR const_reference ref(holder_type const& r) SPROUT_NOEXCEPT {
return r;
}
static SPROUT_CONSTEXPR pointer ptr(holder_type& r) SPROUT_NOEXCEPT {
@ -81,11 +83,11 @@ namespace sprout {
static SPROUT_CONSTEXPR holder_type const&& hold(movable_param_type p) SPROUT_NOEXCEPT {
return sprout::move(p);
}
static SPROUT_CONSTEXPR reference ref(holder_type& r) {
return *r;
static SPROUT_CONSTEXPR reference ref(holder_type& r) SPROUT_NOEXCEPT {
return r;
}
static SPROUT_CONSTEXPR const_reference ref(holder_type const& r) {
return *r;
static SPROUT_CONSTEXPR const_reference ref(holder_type const& r) SPROUT_NOEXCEPT {
return r;
}
static SPROUT_CONSTEXPR pointer ptr(holder_type& r) SPROUT_NOEXCEPT {
return sprout::addressof(r);
@ -116,7 +118,9 @@ namespace sprout {
return sprout::addressof(p);
}
static SPROUT_CONSTEXPR reference ref(holder_type r) {
return *r;
return r ? *r
: (throw sprout::bad_optional_access("value_holder<>: bad optional access"), *r)
;
}
static SPROUT_CONSTEXPR pointer ptr(holder_type r) SPROUT_NOEXCEPT {
return r;
@ -144,7 +148,9 @@ namespace sprout {
return sprout::addressof(p);
}
static SPROUT_CONSTEXPR reference ref(holder_type r) {
return *r;
return r ? *r
: (throw sprout::bad_optional_access("value_holder<>: bad optional access"), *r)
;
}
static SPROUT_CONSTEXPR pointer ptr(holder_type r) SPROUT_NOEXCEPT {
return r;
@ -306,6 +312,13 @@ namespace sprout {
SPROUT_CONSTEXPR mutable_or_const_pointer get_ptr() const SPROUT_NOEXCEPT {
return get_pointer();
}
SPROUT_EXPLICIT_CONVERSION SPROUT_CONSTEXPR operator bool() const SPROUT_NOEXCEPT {
return is_initialized();
}
SPROUT_CONSTEXPR bool operator!() const SPROUT_NOEXCEPT {
return !is_initialized();
}
SPROUT_CONSTEXPR bool is_initialized() const SPROUT_NOEXCEPT {
return !!get_pointer();
}