mirror of
https://github.com/ThePhD/sol2.git
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82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
// The MIT License (MIT)
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// Copyright (c) 2013-2016 Rapptz, ThePhD and contributors
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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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#ifndef SOL_STACK_REFERENCE_HPP
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#define SOL_STACK_REFERENCE_HPP
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namespace sol {
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class stack_reference {
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private:
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lua_State* L = nullptr;
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int index = 0;
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protected:
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int registry_index () const noexcept {
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return LUA_NOREF;
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}
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public:
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stack_reference() noexcept = default;
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stack_reference(lua_State* L, int i) noexcept : L(L), index(lua_absindex(L, i)) {}
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stack_reference(stack_reference&& o) noexcept = default;
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stack_reference& operator=(stack_reference&&) noexcept = default;
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stack_reference(const stack_reference&) noexcept = default;
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stack_reference& operator=(const stack_reference&) noexcept = default;
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int push() const noexcept {
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lua_pushvalue(L, index);
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return 1;
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}
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void pop(int n = 1) const noexcept {
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lua_pop(lua_state( ), n);
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}
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int stack_index () const noexcept {
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return index;
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}
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type get_type() const noexcept {
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int result = lua_type(L, index);
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return static_cast<type>(result);
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}
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lua_State* lua_state() const noexcept {
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return L;
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}
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bool valid () const noexcept {
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type t = get_type();
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return t != type::nil && t != type::none;
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}
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};
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inline bool operator== (const stack_reference& l, const stack_reference& r) {
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return lua_compare(l.lua_state(), l.stack_index(), r.stack_index(), LUA_OPEQ) == 0;
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}
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inline bool operator!= (const stack_reference& l, const stack_reference& r) {
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return !operator==(l, r);
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}
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} // sol
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#endif // SOL_STACK_REFERENCE_HPP
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