mirror of
https://github.com/ThePhD/sol2.git
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Merge pull request #11 from ThePhD/master
operator[] support, the right way
This commit is contained in:
Danny
commit
68fc9bf35e
129
sol/proxy.hpp
Normal file
129
sol/proxy.hpp
Normal file
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@ -0,0 +1,129 @@
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// The MIT License (MIT)
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// Copyright (c) 2013 Danny Y., Rapptz
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// Permission is hereby granted, free of charge, to any person obtaining a copy of
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// this software and associated documentation files (the "Software"), to deal in
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// the Software without restriction, including without limitation the rights to
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// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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// the Software, and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "traits.hpp"
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#include "object.hpp"
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#include "function.hpp"
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namespace sol {
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template <typename Table, typename Key>
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struct proxy {
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private:
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Table& tbl;
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Key& key;
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public:
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template <typename T>
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proxy(Table& table, T&& key) : tbl(table), key(std::forward<T>(key)) {
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}
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template<typename T>
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T get() const {
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return tbl.get<T>(key);
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}
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template<typename T>
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proxy& set(T&& item) {
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tbl.set(key, std::forward<T>(item));
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return *this;
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}
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template<typename... Args>
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proxy& set_function(Args&&... args) {
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tbl.set_function(key, std::forward<Args>(args)...);
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return *this;
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}
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template<typename U>
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EnableIf<Function<Unqualified<U>>> operator=(U&& other) {
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tbl.set_function(key, std::forward<U>(other));
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}
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template<typename U>
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DisableIf<Function<Unqualified<U>>> operator=(U&& other) {
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tbl.set(key, std::forward<U>(other));
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}
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operator nil_t () const {
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return get<nil_t>();
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}
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operator object() const {
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return get<object>();
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}
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operator function() const {
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return get<function>();
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}
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operator std::string() const {
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return get<std::string>();
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}
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template <typename T = void>
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operator bool() const {
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return get<bool>();
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}
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template <typename T = void>
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operator double() const {
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return get<double>();
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}
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template <typename T = void>
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operator float() const {
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return get<float>();
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}
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template <typename T = void>
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operator int() const {
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return get<int>();
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}
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template<typename... Ret, typename... Args>
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typename multi_return<Ret...>::type call(Args&&... args) {
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return tbl.get<function>(key)(types<Ret...>(), std::forward<Args>(args)...);
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}
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};
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template <typename Table, typename Key, typename T>
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inline bool operator== (T&& left, const proxy<Table, Key>& right) {
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return left == right.template get<Decay<T>>();
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}
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template <typename Table, typename Key, typename T>
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inline bool operator== (const proxy<Table, Key>& right, T&& left) {
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return right.template get<Decay<T>>() == left;
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}
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template <typename Table, typename Key, typename T>
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inline bool operator!= (T&& left, const proxy<Table, Key>& right) {
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return right.template get<Decay<T>>() != left;
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}
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template <typename Table, typename Key, typename T>
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inline bool operator!= (const proxy<Table, Key>& right, T&& left) {
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return right.template get<Decay<T>>() != left;
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}
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} // sol
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@ -208,7 +208,7 @@ inline int push_user(lua_State* L, T& item) {
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namespace detail {
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template<typename T, std::size_t... I>
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inline void push_tuple(lua_State* L, indices<I...>, T&& tuplen) {
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using swallow = char[ 1 + sizeof...(I) ];
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using swallow = char[1 + sizeof...(I)];
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swallow {'\0', (sol::stack::push(L, std::get<I>(tuplen)), '\0')... };
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}
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@ -173,6 +173,16 @@ public:
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table registry() const {
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return reg;
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}
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template <typename T>
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proxy<table, T> operator[](T&& key) {
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return global[std::forward<T>(key)];
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}
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template <typename T>
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proxy<const table, T> operator[](T&& key) const {
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return global[std::forward<T>(key)];
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}
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};
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} // sol
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@ -22,6 +22,7 @@
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#ifndef SOL_TABLE_HPP
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#define SOL_TABLE_HPP
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#include "proxy.hpp"
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#include "stack.hpp"
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#include "lua_function.hpp"
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#include <array>
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@ -117,6 +118,17 @@ public:
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push();
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return lua_rawlen(state(), -1);
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}
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template <typename T>
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proxy<table, T> operator[](T&& key) {
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return proxy<table, T>(*this, std::forward<T>(key));
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}
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template <typename T>
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proxy<const table, T> operator[](T&& key) const {
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return proxy<const table, T>(*this, std::forward<T>(key));
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}
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private:
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template<typename T, typename TFx>
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table& set_isfunction_fx(std::true_type, T&& key, TFx&& fx) {
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@ -170,7 +182,7 @@ private:
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void* userobjdata = static_cast<void*>(detail::get_ptr(obj));
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lua_CFunction freefunc = &static_object_lua_func<Decay<TObj>, TFx>::call;
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const char* freefuncname = fkey.c_str();
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const luaL_Reg funcreg[ 2 ] = {
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const luaL_Reg funcreg[2] = {
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{ freefuncname, freefunc },
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{ nullptr, nullptr }
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};
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@ -192,7 +204,7 @@ private:
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Decay<TFx> target(std::forward<TFx>(fx));
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lua_CFunction freefunc = &static_lua_func<TFx>::call;
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const char* freefuncname = fkey.c_str();
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const luaL_Reg funcreg[ 2 ] = {
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const luaL_Reg funcreg[2] = {
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{ freefuncname, freefunc },
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{ nullptr, nullptr }
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};
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@ -217,7 +229,7 @@ private:
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lua_CFunction freefunc = &lua_func::call;
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const char* freefuncname = fkey.c_str();
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const char* metatablename = metakey.c_str();
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const luaL_Reg funcreg[ 2 ] = {
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const luaL_Reg funcreg[2] = {
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{ freefuncname, freefunc },
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{ nullptr, nullptr }
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};
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@ -56,6 +56,32 @@ struct multi_return<> : types<>{
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template<bool B>
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using Bool = std::integral_constant<bool, B>;
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namespace detail {
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template<typename T, bool isclass = std::is_class<Unqualified<T>>::value>
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struct is_function_impl : std::is_function<typename std::remove_pointer<T>::type> { };
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template<typename T>
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struct is_function_impl<T, true> {
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using yes = char;
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using no = struct { char s[2]; };
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struct F { void operator()(); };
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struct Derived : T, F { };
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template<typename U, U> struct Check;
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template<typename V>
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static no test(Check<void (F::*)(), &V::operator()>*);
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template<typename>
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static yes test(...);
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static const bool value = sizeof(test<Derived>(0)) == sizeof(yes);
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};
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} // detail
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template<typename T>
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struct Function : Bool<detail::is_function_impl<T>::value> { };
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template<typename TFuncSignature>
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struct function_traits;
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147
tests.cpp
147
tests.cpp
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@ -56,7 +56,7 @@ TEST_CASE("simple/get", "Tests if the get function works properly.") {
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REQUIRE(e == true);
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}
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TEST_CASE("simple/addition", "") {
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TEST_CASE("simple/addition", "check if addition works and can be gotten through lua.get and lua.set") {
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sol::state lua;
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lua.set("b", 0.2);
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@ -66,7 +66,7 @@ TEST_CASE("simple/addition", "") {
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REQUIRE(c == 9.2);
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}
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TEST_CASE("simple/if", "") {
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TEST_CASE("simple/if", "check if if statements work through lua") {
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sol::state lua;
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std::string program = "if true then f = 0.1 else f = 'test' end";
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@ -74,9 +74,10 @@ TEST_CASE("simple/if", "") {
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auto f = lua.get<double>("f");
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REQUIRE(f == 0.1);
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REQUIRE((f == lua["f"]));
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}
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TEST_CASE("simple/callWithParameters", "Lua function is called with a few parameters from C++") {
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TEST_CASE("simple/call_with_parameters", "Lua function is called with a few parameters from C++") {
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sol::state lua;
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REQUIRE_NOTHROW(lua.script("function my_add(i, j, k) return i + j + k end"));
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@ -90,7 +91,7 @@ TEST_CASE("simple/callWithParameters", "Lua function is called with a few parame
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REQUIRE_THROWS(a = f.call<int>(1, 2, "arf"));
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}
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TEST_CASE("simple/callCppFunction", "C++ function is called from lua") {
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TEST_CASE("simple/call_c++_function", "C++ function is called from lua") {
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sol::state lua;
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lua.set_function("plop_xyz", plop_xyz);
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@ -99,58 +100,93 @@ TEST_CASE("simple/callCppFunction", "C++ function is called from lua") {
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REQUIRE(lua.get<int>("x") == 11);
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}
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TEST_CASE("simple/callLambda", "A C++ lambda is exposed to lua and called") {
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TEST_CASE("simple/call_lambda", "A C++ lambda is exposed to lua and called") {
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sol::state lua;
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int x = 0;
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lua.set_function("foo", [ &x ] { x = 1; });
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lua.set_function("foo", [&x] { x = 1; });
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lua.script("foo()");
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REQUIRE(x == 1);
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}
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TEST_CASE("advanced/callLambdaReturns", "Checks for lambdas returning values") {
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TEST_CASE("advanced/get_and_call", "Checks for lambdas returning values after a get operation") {
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const static std::string lol = "lol", str = "str";
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const static std::tuple<int, float, double, std::string> heh_tuple = std::make_tuple(1, 6.28f, 3.14, std::string("heh"));
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sol::state lua;
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REQUIRE_NOTHROW(lua.set_function("a", [ ] { return 42; }));
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REQUIRE_NOTHROW(lua.set_function("a", [] { return 42; }));
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REQUIRE(lua.get<sol::function>("a").call<int>() == 42);
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REQUIRE_NOTHROW(lua.set_function("b", [ ] { return 42u; }));
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REQUIRE_NOTHROW(lua.set_function("b", [] { return 42u; }));
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REQUIRE(lua.get<sol::function>("b").call<unsigned int>() == 42u);
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REQUIRE_NOTHROW(lua.set_function("c", [ ] { return 3.14; }));
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REQUIRE_NOTHROW(lua.set_function("c", [] { return 3.14; }));
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REQUIRE(lua.get<sol::function>("c").call<double>() == 3.14);
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REQUIRE_NOTHROW(lua.set_function("d", [ ] { return 6.28f; }));
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REQUIRE_NOTHROW(lua.set_function("d", [] { return 6.28f; }));
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REQUIRE(lua.get<sol::function>("d").call<float>() == 6.28f);
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REQUIRE_NOTHROW(lua.set_function("e", [ ] { return "lol"; }));
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REQUIRE_NOTHROW(lua.set_function("e", [] { return "lol"; }));
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REQUIRE(lua.get<sol::function>("e").call<std::string>() == lol);
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REQUIRE_NOTHROW(lua.set_function("f", [ ] { return true; }));
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REQUIRE_NOTHROW(lua.set_function("f", [] { return true; }));
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REQUIRE(lua.get<sol::function>("f").call<bool>());
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REQUIRE_NOTHROW(lua.set_function("g", [ ] { return std::string("str"); }));
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REQUIRE_NOTHROW(lua.set_function("g", [] { return std::string("str"); }));
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REQUIRE(lua.get<sol::function>("g").call<std::string>() == str);
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REQUIRE_NOTHROW(lua.set_function("h", [ ] { }));
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REQUIRE_NOTHROW(lua.set_function("h", [] { }));
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REQUIRE_NOTHROW(lua.get<sol::function>("h").call());
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REQUIRE_NOTHROW(lua.set_function("i", [ ] { return sol::nil; }));
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REQUIRE_NOTHROW(lua.set_function("i", [] { return sol::nil; }));
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REQUIRE(lua.get<sol::function>("i").call<sol::nil_t>() == sol::nil);
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REQUIRE_NOTHROW(lua.set_function("j", [ ] { return std::make_tuple(1, 6.28f, 3.14, std::string("heh")); }));
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REQUIRE_NOTHROW(lua.set_function("j", [] { return std::make_tuple(1, 6.28f, 3.14, std::string("heh")); }));
|
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REQUIRE((lua.get<sol::function>("j").call<int, float, double, std::string>() == heh_tuple));
|
||||
}
|
||||
|
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TEST_CASE("advanced/callLambda2", "A C++ lambda is exposed to lua and called") {
|
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TEST_CASE("advanced/operator[]_calls", "Checks for lambdas returning values using operator[]") {
|
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const static std::string lol = "lol", str = "str";
|
||||
const static std::tuple<int, float, double, std::string> heh_tuple = std::make_tuple(1, 6.28f, 3.14, std::string("heh"));
|
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sol::state lua;
|
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REQUIRE_NOTHROW(lua.set_function("a", [] { return 42; }));
|
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REQUIRE(lua["a"].call<int>() == 42);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("b", [] { return 42u; }));
|
||||
REQUIRE(lua["b"].call<unsigned int>() == 42u);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("c", [] { return 3.14; }));
|
||||
REQUIRE(lua["c"].call<double>() == 3.14);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("d", [] { return 6.28f; }));
|
||||
REQUIRE(lua["d"].call<float>() == 6.28f);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("e", [] { return "lol"; }));
|
||||
REQUIRE(lua["e"].call<std::string>() == lol);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("f", [] { return true; }));
|
||||
REQUIRE(lua["f"].call<bool>());
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("g", [] { return std::string("str"); }));
|
||||
REQUIRE(lua["g"].call<std::string>() == str);
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("h", [] { }));
|
||||
REQUIRE_NOTHROW(lua["h"].call());
|
||||
|
||||
REQUIRE_NOTHROW(lua.set_function("i", [] { return sol::nil; }));
|
||||
REQUIRE(lua["i"].call<sol::nil_t>() == sol::nil);
|
||||
REQUIRE_NOTHROW(lua.set_function("j", [] { return std::make_tuple(1, 6.28f, 3.14, std::string("heh")); }));
|
||||
REQUIRE((lua["j"].call<int, float, double, std::string>() == heh_tuple));
|
||||
}
|
||||
|
||||
TEST_CASE("advanced/call_lambdas", "A C++ lambda is exposed to lua and called") {
|
||||
sol::state lua;
|
||||
|
||||
int x = 0;
|
||||
lua.set_function("set_x", [ &] (int new_x) {
|
||||
lua.set_function("set_x", [&] (int new_x) {
|
||||
x = new_x;
|
||||
return 0;
|
||||
});
|
||||
|
|
@ -159,13 +195,13 @@ TEST_CASE("advanced/callLambda2", "A C++ lambda is exposed to lua and called") {
|
|||
REQUIRE(x == 9);
|
||||
}
|
||||
|
||||
TEST_CASE("negative/basicError", "Check if error handling works correctly") {
|
||||
TEST_CASE("negative/basic_errors", "Check if error handling works correctly") {
|
||||
sol::state lua;
|
||||
|
||||
REQUIRE_THROWS(lua.script("nil[5]"));
|
||||
}
|
||||
|
||||
TEST_CASE("libraries", "Check if we can open libraries through sol") {
|
||||
TEST_CASE("libraries", "Check if we can open libraries") {
|
||||
sol::state lua;
|
||||
REQUIRE_NOTHROW(lua.open_libraries(sol::lib::base, sol::lib::os));
|
||||
}
|
||||
|
|
@ -180,16 +216,16 @@ TEST_CASE("tables/variables", "Check if tables and variables work as intended")
|
|||
TEST_CASE("tables/functions_variables", "Check if tables and function calls work as intended") {
|
||||
sol::state lua;
|
||||
lua.open_libraries(sol::lib::base, sol::lib::os);
|
||||
auto run_script = [ ] (sol::state& lua) -> void {
|
||||
auto run_script = [] (sol::state& lua) -> void {
|
||||
lua.script("assert(os.fun() == \"test\")");
|
||||
};
|
||||
|
||||
lua.get<sol::table>("os").set_function("fun",
|
||||
[ ] () {
|
||||
[] () {
|
||||
std::cout << "stateless lambda()" << std::endl;
|
||||
return "test";
|
||||
}
|
||||
);
|
||||
);
|
||||
REQUIRE_NOTHROW(run_script(lua));
|
||||
|
||||
lua.get<sol::table>("os").set_function("fun", &free_function);
|
||||
|
|
@ -203,11 +239,11 @@ TEST_CASE("tables/functions_variables", "Check if tables and function calls work
|
|||
// stateful lambda: non-convertible, unoptomizable
|
||||
int breakit = 50;
|
||||
lua.get<sol::table>("os").set_function("fun",
|
||||
[ &breakit ] () {
|
||||
[&breakit] () {
|
||||
std::cout << "stateless lambda()" << std::endl;
|
||||
return "test";
|
||||
}
|
||||
);
|
||||
);
|
||||
REQUIRE_NOTHROW(run_script(lua));
|
||||
|
||||
// r-value, cannot optomize
|
||||
|
|
@ -220,12 +256,12 @@ TEST_CASE("tables/functions_variables", "Check if tables and function calls work
|
|||
REQUIRE_NOTHROW(run_script(lua));
|
||||
}
|
||||
|
||||
TEST_CASE("functions/return_order_and_multi_get", "Check if return order is in the same reading order specified in Lua" ) {
|
||||
TEST_CASE("functions/return_order_and_multi_get", "Check if return order is in the same reading order specified in Lua") {
|
||||
const static std::tuple<int, int, int> triple = std::make_tuple(10, 11, 12);
|
||||
sol::state lua;
|
||||
lua.set_function( "f", [ ] {
|
||||
return std::make_tuple( 10, 11, 12 );
|
||||
} );
|
||||
lua.set_function("f", [] {
|
||||
return std::make_tuple(10, 11, 12);
|
||||
});
|
||||
lua.script("function g() return 10, 11, 12 end\nx,y,z = g()");
|
||||
auto tcpp = lua.get<sol::function>("f").call<int, int, int>();
|
||||
auto tlua = lua.get<sol::function>("g").call<int, int, int>();
|
||||
|
|
@ -237,3 +273,54 @@ TEST_CASE("functions/return_order_and_multi_get", "Check if return order is in t
|
|||
REQUIRE(tlua == triple);
|
||||
REQUIRE(tluaget == triple);
|
||||
}
|
||||
|
||||
TEST_CASE("tables/operator[]", "Check if operator[] retrieval and setting works properly") {
|
||||
sol::state lua;
|
||||
lua.open_libraries(sol::lib::base);
|
||||
|
||||
lua.script("foo = 20\nbar = \"hello world\"");
|
||||
// basic retrieval
|
||||
std::string bar = lua["bar"];
|
||||
int foo = lua["foo"];
|
||||
REQUIRE(bar == "hello world");
|
||||
REQUIRE(foo == 20);
|
||||
// test operator= for stringification
|
||||
// errors due to ambiguous operators
|
||||
bar = lua["bar"];
|
||||
|
||||
// basic setting
|
||||
lua["bar"] = 20.4;
|
||||
lua["foo"] = "goodbye";
|
||||
|
||||
// doesn't modify the actual values obviously.
|
||||
REQUIRE(bar == "hello world");
|
||||
REQUIRE(foo == 20);
|
||||
|
||||
// function setting
|
||||
lua["test"] = plop_xyz;
|
||||
REQUIRE_NOTHROW(lua.script("assert(test(10, 11, \"hello\") == 11)"));
|
||||
|
||||
// function retrieval
|
||||
sol::function test = lua["test"];
|
||||
REQUIRE(test.call<int>(10, 11, "hello") == 11);
|
||||
|
||||
// setting a lambda
|
||||
lua["lamb"] = [](int x) {
|
||||
return x * 2;
|
||||
};
|
||||
|
||||
REQUIRE_NOTHROW(lua.script("assert(lamb(220) == 440)"));
|
||||
|
||||
// function retrieval of a lambda
|
||||
sol::function lamb = lua["lamb"];
|
||||
REQUIRE(lamb.call<int>(220) == 440);
|
||||
|
||||
// test const table retrieval
|
||||
auto assert1 = [](const sol::table& t) {
|
||||
std::string a = t["foo"];
|
||||
int b = t["bar"];
|
||||
std::cout << a << ',' << b << '\n';
|
||||
};
|
||||
|
||||
REQUIRE_NOTHROW(assert1(lua.global_table()));
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user