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usertype_container.hpp
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usertype_container.hpp
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// sol2
// The MIT License (MIT)
// Copyright (c) 2013-2022 Rapptz, ThePhD and contributors
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#ifndef SOL_USERTYPE_CONTAINER_HPP
#define SOL_USERTYPE_CONTAINER_HPP
#include <sol/traits.hpp>
#include <sol/stack.hpp>
#include <sol/object.hpp>
namespace sol {
template <typename T>
struct usertype_container;
namespace container_detail {
template <typename T>
struct has_clear_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::clear));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_empty_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::empty));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_erase_after_test {
private:
template <typename C>
static meta::sfinae_yes_t test(
decltype(std::declval<C>().erase_after(std::declval<std::add_rvalue_reference_t<typename C::const_iterator>>()))*);
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T, typename = void>
struct has_find_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(std::declval<C>().find(std::declval<std::add_rvalue_reference_t<typename C::value_type>>()))*);
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_find_test<T, std::enable_if_t<meta::is_lookup<T>::value>> {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(std::declval<C>().find(std::declval<std::add_rvalue_reference_t<typename C::key_type>>()))*);
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_erase_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(std::declval<C>().erase(std::declval<typename C::iterator>()))*);
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_erase_key_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(std::declval<C>().erase(std::declval<typename C::key_type>()))*);
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_find_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::find));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_index_of_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::index_of));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_insert_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::insert));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_erase_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::erase));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_index_set_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::index_set));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_index_get_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::index_get));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_set_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::set));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_get_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::get));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_at_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::at));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_pairs_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::pairs));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_ipairs_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::ipairs));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_next_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::next));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_add_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::add));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
struct has_traits_size_test {
private:
template <typename C>
static meta::sfinae_yes_t test(decltype(&C::size));
template <typename C>
static meta::sfinae_no_t test(...);
public:
static constexpr bool value = std::is_same_v<decltype(test<T>(0)), meta::sfinae_yes_t>;
};
template <typename T>
using has_clear = meta::boolean<has_clear_test<T>::value>;
template <typename T>
using has_empty = meta::boolean<has_empty_test<T>::value>;
template <typename T>
using has_find = meta::boolean<has_find_test<T>::value>;
template <typename T>
using has_erase = meta::boolean<has_erase_test<T>::value>;
template <typename T>
using has_erase_key = meta::boolean<has_erase_key_test<T>::value>;
template <typename T>
using has_erase_after = meta::boolean<has_erase_after_test<T>::value>;
template <typename T>
using has_traits_get = meta::boolean<has_traits_get_test<T>::value>;
template <typename T>
using has_traits_at = meta::boolean<has_traits_at_test<T>::value>;
template <typename T>
using has_traits_set = meta::boolean<has_traits_set_test<T>::value>;
template <typename T>
using has_traits_index_get = meta::boolean<has_traits_index_get_test<T>::value>;
template <typename T>
using has_traits_index_set = meta::boolean<has_traits_index_set_test<T>::value>;
template <typename T>
using has_traits_pairs = meta::boolean<has_traits_pairs_test<T>::value>;
template <typename T>
using has_traits_ipairs = meta::boolean<has_traits_ipairs_test<T>::value>;
template <typename T>
using has_traits_next = meta::boolean<has_traits_next_test<T>::value>;
template <typename T>
using has_traits_add = meta::boolean<has_traits_add_test<T>::value>;
template <typename T>
using has_traits_size = meta::boolean<has_traits_size_test<T>::value>;
template <typename T>
using has_traits_clear = has_clear<T>;
template <typename T>
using has_traits_empty = has_empty<T>;
template <typename T>
using has_traits_find = meta::boolean<has_traits_find_test<T>::value>;
template <typename T>
using has_traits_index_of = meta::boolean<has_traits_index_of_test<T>::value>;
template <typename T>
using has_traits_insert = meta::boolean<has_traits_insert_test<T>::value>;
template <typename T>
using has_traits_erase = meta::boolean<has_traits_erase_test<T>::value>;
template <typename T>
struct is_forced_container : is_container<T> { };
template <typename T>
struct is_forced_container<as_container_t<T>> : std::true_type { };
template <typename T>
struct container_decay {
typedef T type;
};
template <typename T>
struct container_decay<as_container_t<T>> {
typedef T type;
};
template <typename T>
using container_decay_t = typename container_decay<meta::unqualified_t<T>>::type;
template <typename T>
decltype(auto) get_key(std::false_type, T&& t) {
return std::forward<T>(t);
}
template <typename T>
decltype(auto) get_key(std::true_type, T&& t) {
return t.first;
}
template <typename T>
decltype(auto) get_value(std::false_type, T&& t) {
return std::forward<T>(t);
}
template <typename T>
decltype(auto) get_value(std::true_type, T&& t) {
return t.second;
}
template <typename X, typename = void>
struct usertype_container_default {
private:
typedef std::remove_pointer_t<meta::unwrap_unqualified_t<X>> T;
public:
typedef lua_nil_t iterator;
typedef iterator sentinel;
typedef lua_nil_t value_type;
static int at(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'at(index)' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int get(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'get(key)' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int index_get(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'container[key]' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int set(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'set(key, value)' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int index_set(lua_State* L_) {
return luaL_error(
L_, "sol: cannot call 'container[key] = value' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int add(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'add' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int insert(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'insert' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int find(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'find' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int index_of(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'index_of' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int size(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'end' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int clear(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'clear' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int empty(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'empty' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int erase(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'erase' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int next(lua_State* L_) {
return luaL_error(L_, "sol: cannot call 'next' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int pairs(lua_State* L_) {
return luaL_error(L_, "sol: cannot call '__pairs/pairs' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static int ipairs(lua_State* L_) {
return luaL_error(L_, "sol: cannot call '__ipairs' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
}
static iterator begin(lua_State* L_, T&) {
luaL_error(L_, "sol: cannot call 'being' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
return lua_nil;
}
static sentinel end(lua_State* L_, T&) {
luaL_error(L_, "sol: cannot call 'end' on type '%s': it is not recognized as a container", detail::demangle<T>().c_str());
return lua_nil;
}
};
template <typename X>
struct usertype_container_default<X,
std::enable_if_t<meta::all<is_forced_container<meta::unqualified_t<X>>, meta::has_value_type<meta::unqualified_t<container_decay_t<X>>>,
meta::has_iterator<meta::unqualified_t<container_decay_t<X>>>>::value>> {
private:
using T = std::remove_pointer_t<meta::unwrap_unqualified_t<container_decay_t<X>>>;
private:
using deferred_uc = usertype_container<X>;
using is_associative = meta::is_associative<T>;
using is_lookup = meta::is_lookup<T>;
using is_ordered = meta::is_ordered<T>;
using is_matched_lookup = meta::is_matched_lookup<T>;
using iterator = typename T::iterator;
using sentinel = meta::sentinel_or_t<T, iterator>;
using value_type = typename T::value_type;
typedef meta::conditional_t<is_matched_lookup::value, std::pair<value_type, value_type>,
meta::conditional_t<is_associative::value || is_lookup::value, value_type, std::pair<std::ptrdiff_t, value_type>>>
KV;
typedef typename KV::first_type K;
typedef typename KV::second_type V;
typedef meta::conditional_t<is_matched_lookup::value, std::ptrdiff_t, K> next_K;
typedef decltype(*std::declval<iterator&>()) iterator_return;
typedef meta::conditional_t<is_associative::value || is_matched_lookup::value, std::add_lvalue_reference_t<V>,
meta::conditional_t<is_lookup::value, V, iterator_return>>
captured_type;
typedef typename meta::iterator_tag<iterator>::type iterator_category;
typedef std::is_same<iterator_category, std::input_iterator_tag> is_input_iterator;
typedef meta::conditional_t<is_input_iterator::value, V, decltype(detail::deref_move_only(std::declval<captured_type>()))> push_type;
typedef std::is_copy_assignable<V> is_copyable;
typedef meta::neg<meta::any<std::is_const<V>, std::is_const<std::remove_reference_t<iterator_return>>, meta::neg<is_copyable>>> is_writable;
typedef meta::unqualified_t<decltype(get_key(is_associative(), std::declval<std::add_lvalue_reference_t<value_type>>()))> key_type;
typedef meta::all<std::is_integral<K>, meta::neg<meta::any<is_associative, is_lookup>>> is_linear_integral;
struct iter : detail::ebco<iterator, 0>, detail::ebco<sentinel, 1> {
using it_base = detail::ebco<iterator, 0>;
using sen_base = detail::ebco<sentinel, 1>;
main_reference keep_alive;
std::size_t index;
iter(lua_State* L_, int stack_index_, iterator it_, sentinel sen_) noexcept
: it_base(std::move(it_)), sen_base(std::move(sen_)), keep_alive(L_, stack_index_), index(0) {
}
iterator& it() noexcept {
return it_base::value();
}
const iterator& it() const noexcept {
return it_base::value();
}
sentinel& sen() noexcept {
return sen_base::value();
}
const sentinel& sen() const noexcept {
return sen_base::value();
}
};
static auto& get_src(lua_State* L_) {
#if SOL_IS_ON(SOL_SAFE_USERTYPE)
auto p = stack::unqualified_check_get<T*>(L_, 1);
if (!p) {
luaL_error(L_,
"sol: 'self' is not of type '%s' (pass 'self' as first argument with ':' or call on proper type)",
detail::demangle<T>().c_str());
}
if (p.value() == nullptr) {
luaL_error(
L_, "sol: 'self' argument is nil (pass 'self' as first argument with ':' or call on a '%s' type)", detail::demangle<T>().c_str());
}
return *p.value();
#else
return stack::unqualified_get<T>(L_, 1);
#endif // Safe getting with error
}
static detail::error_result at_category(std::input_iterator_tag, lua_State* L_, T& self, std::ptrdiff_t pos) {
pos += deferred_uc::index_adjustment(L_, self);
if (pos < 0) {
return stack::push(L_, lua_nil);
}
auto it = deferred_uc::begin(L_, self);
auto e = deferred_uc::end(L_, self);
if (it == e) {
return stack::push(L_, lua_nil);
}
while (pos > 0) {
--pos;
++it;
if (it == e) {
return stack::push(L_, lua_nil);
}
}
return get_associative(is_associative(), L_, it);
}
static detail::error_result at_category(std::random_access_iterator_tag, lua_State* L_, T& self, std::ptrdiff_t pos) {
std::ptrdiff_t len = static_cast<std::ptrdiff_t>(size_start(L_, self));
pos += deferred_uc::index_adjustment(L_, self);
if (pos < 0 || pos >= len) {
return stack::push(L_, lua_nil);
}
auto it = std::next(deferred_uc::begin(L_, self), pos);
return get_associative(is_associative(), L_, it);
}
static detail::error_result at_start(lua_State* L_, T& self, std::ptrdiff_t pos) {
return at_category(iterator_category(), L_, self, pos);
}
template <typename Iter>
static detail::error_result get_associative(std::true_type, lua_State* L_, Iter& it) {
decltype(auto) v = *it;
return stack::stack_detail::push_reference<push_type>(L_, detail::deref_move_only(v.second));
}
template <typename Iter>
static detail::error_result get_associative(std::false_type, lua_State* L_, Iter& it) {
return stack::stack_detail::push_reference<push_type>(L_, detail::deref_move_only(*it));
}
static detail::error_result get_category(std::input_iterator_tag, lua_State* L_, T& self, K& key) {
key = static_cast<K>(key + deferred_uc::index_adjustment(L_, self));
if (key < 0) {
return stack::push(L_, lua_nil);
}
auto it = deferred_uc::begin(L_, self);
auto e = deferred_uc::end(L_, self);
if (it == e) {
return stack::push(L_, lua_nil);
}
while (key > 0) {
--key;
++it;
if (it == e) {
return stack::push(L_, lua_nil);
}
}
return get_associative(is_associative(), L_, it);
}
static detail::error_result get_category(std::random_access_iterator_tag, lua_State* L_, T& self, K& key) {
std::ptrdiff_t len = static_cast<std::ptrdiff_t>(size_start(L_, self));
key = static_cast<K>(static_cast<std::ptrdiff_t>(key) + deferred_uc::index_adjustment(L_, self));
if (key < 0 || key >= len) {
return stack::push(L_, lua_nil);
}
auto it = std::next(deferred_uc::begin(L_, self), key);
return get_associative(is_associative(), L_, it);
}
static detail::error_result get_it(std::true_type, lua_State* L_, T& self, K& key) {
return get_category(iterator_category(), L_, self, key);
}
static detail::error_result get_comparative(std::true_type, lua_State* L_, T& self, K& key) {
auto fx = [&](const value_type& r) -> bool { return key == get_key(is_associative(), r); };
auto e = deferred_uc::end(L_, self);
auto it = std::find_if(deferred_uc::begin(L_, self), e, std::ref(fx));
if (it == e) {
return stack::push(L_, lua_nil);
}
return get_associative(is_associative(), L_, it);
}
static detail::error_result get_comparative(std::false_type, lua_State*, T&, K&) {
return detail::error_result("cannot get this key on '%s': no suitable way to increment iterator and compare to key value '%s'",
detail::demangle<T>().data(),
detail::demangle<K>().data());
}
static detail::error_result get_it(std::false_type, lua_State* L_, T& self, K& key) {
return get_comparative(meta::supports_op_equal<K, key_type>(), L_, self, key);
}
static detail::error_result set_associative(std::true_type, iterator& it, stack_object value) {
decltype(auto) v = *it;
v.second = value.as<V>();
return {};
}
static detail::error_result set_associative(std::false_type, iterator& it, stack_object value) {
decltype(auto) v = *it;
v = value.as<V>();
return {};
}
static detail::error_result set_writable(std::true_type, lua_State*, T&, iterator& it, stack_object value) {
return set_associative(is_associative(), it, std::move(value));
}
static detail::error_result set_writable(std::false_type, lua_State*, T&, iterator&, stack_object) {
return detail::error_result(
"cannot perform a 'set': '%s's iterator reference is not writable (non-copy-assignable or const)", detail::demangle<T>().data());
}
static detail::error_result set_category(std::input_iterator_tag, lua_State* L_, T& self, stack_object okey, stack_object value) {
decltype(auto) key = okey.as<K>();
key = static_cast<K>(static_cast<std::ptrdiff_t>(key) + deferred_uc::index_adjustment(L_, self));
auto e = deferred_uc::end(L_, self);
auto it = deferred_uc::begin(L_, self);
auto backit = it;
for (; key > 0 && it != e; --key, ++it) {
backit = it;
}
if (it == e) {
if (key == 0) {
return add_copyable(is_copyable(), L_, self, std::move(value), meta::has_insert_after<T>::value ? backit : it);
}
return detail::error_result("out of bounds (too big) for set on '%s'", detail::demangle<T>().c_str());
}
return set_writable(is_writable(), L_, self, it, std::move(value));
}
static detail::error_result set_category(std::random_access_iterator_tag, lua_State* L_, T& self, stack_object okey, stack_object value) {
decltype(auto) key = okey.as<K>();
key = static_cast<K>(static_cast<std::ptrdiff_t>(key) + deferred_uc::index_adjustment(L_, self));
if (key < 0) {
return detail::error_result("sol: out of bounds (too small) for set on '%s'", detail::demangle<T>().c_str());
}
std::ptrdiff_t len = static_cast<std::ptrdiff_t>(size_start(L_, self));
if (key == len) {
return add_copyable(is_copyable(), L_, self, std::move(value));
}
else if (key >= len) {
return detail::error_result("sol: out of bounds (too big) for set on '%s'", detail::demangle<T>().c_str());
}
auto it = std::next(deferred_uc::begin(L_, self), key);
return set_writable(is_writable(), L_, self, it, std::move(value));
}
static detail::error_result set_comparative(std::true_type, lua_State* L_, T& self, stack_object okey, stack_object value) {
decltype(auto) key = okey.as<K>();
if (!is_writable::value) {
return detail::error_result(
"cannot perform a 'set': '%s's iterator reference is not writable (non-copy-assignable or const)", detail::demangle<T>().data());
}
auto fx = [&](const value_type& r) -> bool { return key == get_key(is_associative(), r); };
auto e = deferred_uc::end(L_, self);
auto it = std::find_if(deferred_uc::begin(L_, self), e, std::ref(fx));
if (it == e) {
return {};
}
return set_writable(is_writable(), L_, self, it, std::move(value));
}
static detail::error_result set_comparative(std::false_type, lua_State*, T&, stack_object, stack_object) {
return detail::error_result("cannot set this value on '%s': no suitable way to increment iterator or compare to '%s' key",
detail::demangle<T>().data(),
detail::demangle<K>().data());
}
template <typename Iter>
static detail::error_result set_associative_insert(std::true_type, lua_State*, T& self, Iter& it, K& key, stack_object value) {
if constexpr (meta::has_insert_with_iterator<T>::value) {
self.insert(it, value_type(key, value.as<V>()));
return {};
}
else if constexpr (meta::has_insert<T>::value) {
self.insert(value_type(key, value.as<V>()));
return {};
}
else {
(void)self;
(void)it;
(void)key;
return detail::error_result(
"cannot call 'set' on '%s': there is no 'insert' function on this associative type", detail::demangle<T>().c_str());
}
}
template <typename Iter>
static detail::error_result set_associative_insert(std::false_type, lua_State*, T& self, Iter& it, K& key, stack_object) {
if constexpr (meta::has_insert_with_iterator<T>::value) {
self.insert(it, key);
return {};
}
else if constexpr (meta::has_insert<T>::value) {
self.insert(key);
return {};
}
else {
(void)self;
(void)it;
(void)key;
return detail::error_result(
"cannot call 'set' on '%s': there is no 'insert' function on this non-associative type", detail::demangle<T>().c_str());
}
}
static detail::error_result set_associative_find(std::true_type, lua_State* L_, T& self, stack_object okey, stack_object value) {
decltype(auto) key = okey.as<K>();
auto it = self.find(key);
if (it == deferred_uc::end(L_, self)) {
return set_associative_insert(is_associative(), L_, self, it, key, std::move(value));
}
return set_writable(is_writable(), L_, self, it, std::move(value));
}
static detail::error_result set_associative_find(std::false_type, lua_State* L_, T& self, stack_object key, stack_object value) {
return set_comparative(meta::supports_op_equal<K, key_type>(), L_, self, std::move(key), std::move(value));
}
static detail::error_result set_it(std::true_type, lua_State* L_, T& self, stack_object key, stack_object value) {
return set_category(iterator_category(), L_, self, std::move(key), std::move(value));
}
static detail::error_result set_it(std::false_type, lua_State* L_, T& self, stack_object key, stack_object value) {
return set_associative_find(meta::all<has_find<T>, meta::any<is_associative, is_lookup>>(), L_, self, std::move(key), std::move(value));
}
template <bool idx_of = false>
static detail::error_result find_has_associative_lookup(std::true_type, lua_State* L_, T& self) {
if constexpr (!is_ordered::value && idx_of) {
(void)L_;
(void)self;
return detail::error_result("cannot perform an 'index_of': '%s's is not an ordered container", detail::demangle<T>().data());
}
else {
decltype(auto) key = stack::unqualified_get<K>(L_, 2);
auto it = self.find(key);
if (it == deferred_uc::end(L_, self)) {
return stack::push(L_, lua_nil);
}
if constexpr (idx_of) {
auto dist = std::distance(deferred_uc::begin(L_, self), it);
dist -= deferred_uc::index_adjustment(L_, self);
return stack::push(L_, dist);
}
else {
return get_associative(is_associative(), L_, it);
}
}
}
template <bool idx_of = false>
static detail::error_result find_has_associative_lookup(std::false_type, lua_State* L_, T& self) {
if constexpr (!is_ordered::value && idx_of) {
(void)L_;
(void)self;
return detail::error_result("cannot perform an 'index_of': '%s's is not an ordered container", detail::demangle<T>().data());
}
else {
decltype(auto) value = stack::unqualified_get<V>(L_, 2);
auto it = self.find(value);
if (it == deferred_uc::end(L_, self)) {
return stack::push(L_, lua_nil);
}
if constexpr (idx_of) {
auto dist = std::distance(deferred_uc::begin(L_, self), it);
dist -= deferred_uc::index_adjustment(L_, self);
return stack::push(L_, dist);
}
else {
return get_associative(is_associative(), L_, it);
}
}
}
template <bool idx_of = false>
static detail::error_result find_has(std::true_type, lua_State* L_, T& self) {
return find_has_associative_lookup<idx_of>(meta::any<is_lookup, is_associative>(), L_, self);
}
template <typename Iter>
static detail::error_result find_associative_lookup(std::true_type, lua_State* L_, T&, Iter& it, std::size_t) {
return get_associative(is_associative(), L_, it);
}
template <typename Iter>
static detail::error_result find_associative_lookup(std::false_type, lua_State* L_, T& self, Iter&, std::size_t idx) {
idx = static_cast<std::size_t>(static_cast<std::ptrdiff_t>(idx) - deferred_uc::index_adjustment(L_, self));
return stack::push(L_, idx);
}
template <bool = false>
static detail::error_result find_comparative(std::false_type, lua_State*, T&) {
return detail::error_result("cannot call 'find' on '%s': there is no 'find' function and the value_type is not equality comparable",
detail::demangle<T>().c_str());
}
template <bool idx_of = false>
static detail::error_result find_comparative(std::true_type, lua_State* L_, T& self) {
decltype(auto) value = stack::unqualified_get<V>(L_, 2);
auto it = deferred_uc::begin(L_, self);
auto e = deferred_uc::end(L_, self);
std::size_t idx = 0;
for (;; ++it, ++idx) {
if (it == e) {
return stack::push(L_, lua_nil);
}
if (value == get_value(is_associative(), *it)) {
break;
}
}
return find_associative_lookup(meta::all<meta::boolean<!idx_of>, meta::any<is_lookup, is_associative>>(), L_, self, it, idx);
}
template <bool idx_of = false>
static detail::error_result find_has(std::false_type, lua_State* L_, T& self) {
return find_comparative<idx_of>(meta::supports_op_equal<V>(), L_, self);
}
template <typename Iter>
static detail::error_result add_insert_after(std::false_type, lua_State* L_, T& self, stack_object value, Iter&) {
return add_insert_after(std::false_type(), L_, self, value);
}
static detail::error_result add_insert_after(std::false_type, lua_State*, T&, stack_object) {
return detail::error_result("cannot call 'add' on type '%s': no suitable insert/push_back C++ functions", detail::demangle<T>().data());
}
template <typename Iter>
static detail::error_result add_insert_after(std::true_type, lua_State*, T& self, stack_object value, Iter& pos) {
self.insert_after(pos, value.as<V>());
return {};
}
static detail::error_result add_insert_after(std::true_type, lua_State* L_, T& self, stack_object value) {
auto backit = self.before_begin();
{
auto e = deferred_uc::end(L_, self);
for (auto it = deferred_uc::begin(L_, self); it != e; ++backit, ++it) { }
}
return add_insert_after(std::true_type(), L_, self, value, backit);
}
template <typename Iter>
static detail::error_result add_insert(std::true_type, lua_State*, T& self, stack_object value, Iter& pos) {
self.insert(pos, value.as<V>());
return {};
}
static detail::error_result add_insert(std::true_type, lua_State* L_, T& self, stack_object value) {
auto pos = deferred_uc::end(L_, self);
return add_insert(std::true_type(), L_, self, value, pos);
}
template <typename Iter>
static detail::error_result add_insert(std::false_type, lua_State* L_, T& self, stack_object value, Iter& pos) {
return add_insert_after(meta::has_insert_after<T>(), L_, self, std::move(value), pos);
}
static detail::error_result add_insert(std::false_type, lua_State* L_, T& self, stack_object value) {
return add_insert_after(meta::has_insert_after<T>(), L_, self, std::move(value));
}
template <typename Iter>
static detail::error_result add_push_back(std::true_type, lua_State*, T& self, stack_object value, Iter&) {
self.push_back(value.as<V>());
return {};
}
static detail::error_result add_push_back(std::true_type, lua_State*, T& self, stack_object value) {
self.push_back(value.as<V>());
return {};
}
template <typename Iter>
static detail::error_result add_push_back(std::false_type, lua_State* L_, T& self, stack_object value, Iter& pos) {
return add_insert(
std::integral_constant < bool, meta::has_insert<T>::value || meta::has_insert_with_iterator<T>::value > (), L_, self, value, pos);
}
static detail::error_result add_push_back(std::false_type, lua_State* L_, T& self, stack_object value) {
return add_insert(
std::integral_constant < bool, meta::has_insert<T>::value || meta::has_insert_with_iterator<T>::value > (), L_, self, value);
}
template <typename Iter>
static detail::error_result add_associative(std::true_type, lua_State* L_, T& self, stack_object key, Iter& pos) {
if constexpr (meta::has_insert_with_iterator<T>::value) {
self.insert(pos, value_type(key.as<K>(), stack::unqualified_get<V>(L_, 3)));
return {};
}
else if constexpr (meta::has_insert<T>::value) {
self.insert(value_type(key.as<K>(), stack::unqualified_get<V>(L_, 3)));
return {};
}
else {
(void)L_;
(void)self;
(void)key;
(void)pos;
return detail::error_result(
"cannot call 'insert' on '%s': there is no 'insert' function on this associative type", detail::demangle<T>().c_str());
}
}
static detail::error_result add_associative(std::true_type, lua_State* L_, T& self, stack_object key) {
auto pos = deferred_uc::end(L_, self);
return add_associative(std::true_type(), L_, self, std::move(key), pos);
}
template <typename Iter>
static detail::error_result add_associative(std::false_type, lua_State* L_, T& self, stack_object value, Iter& pos) {
return add_push_back(meta::has_push_back<T>(), L_, self, value, pos);
}
static detail::error_result add_associative(std::false_type, lua_State* L_, T& self, stack_object value) {
return add_push_back(meta::has_push_back<T>(), L_, self, value);
}
template <typename Iter>
static detail::error_result add_copyable(std::true_type, lua_State* L_, T& self, stack_object value, Iter& pos) {
return add_associative(is_associative(), L_, self, std::move(value), pos);
}
static detail::error_result add_copyable(std::true_type, lua_State* L_, T& self, stack_object value) {
return add_associative(is_associative(), L_, self, value);
}
template <typename Iter>
static detail::error_result add_copyable(std::false_type, lua_State* L_, T& self, stack_object value, Iter&) {
return add_copyable(std::false_type(), L_, self, std::move(value));
}