mirror of
https://github.com/ThePhD/sol2.git
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eb1560d12a
improve exception documentation improve state_view default handlers add SAFE_PROPAGATION defines for compiling C++ as Lua add examples for automatic operator registrations and as_container fix tutorial code change tests to not throw unless absolutely necessary provide synchronization for file writing in tests provide thread safety around thread tests for REQUIRE add ostream automatic support change 5.1 compat to only kick in luaL_loadbufferx and luaL_loadfilex when LuaJIT is version 2.0.1 and lower
74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
#define SOL_CHECK_ARGUMENTS 1
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#include <sol.hpp>
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#include <vector>
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#include <numeric>
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#include <cassert>
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#include <iostream>
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class number_storage {
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private:
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std::vector<int> data;
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public:
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number_storage(int i) { data.push_back(i); }
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int accumulate() const {
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return std::accumulate(data.begin(), data.end(), 0);
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}
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public:
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using value_type = decltype(data)::value_type;
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using iterator = decltype(data)::iterator;
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using size_type = decltype(data)::size_type;
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iterator begin() { return iterator(data.begin()); }
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iterator end() { return iterator(data.end()); }
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size_type size() const noexcept { return data.size(); }
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size_type max_size() const noexcept { return data.max_size(); }
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void push_back(int value) { data.push_back(value); }
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bool empty() const noexcept { return data.empty(); }
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};
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namespace sol {
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template <>
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struct is_container<number_storage> : std::false_type {};
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}
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int main(int, char*[]) {
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std::cout << "=== container as container example ===" << std::endl;
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sol::state lua;
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lua.open_libraries(sol::lib::base);
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lua.new_usertype<number_storage>("number_storage",
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sol::constructors<number_storage(int)>(),
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"accumulate", &number_storage::accumulate,
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"iterable", [](number_storage& ns) {
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return sol::as_container(ns); // treat like a container, despite is_container specialization
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}
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);
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lua.script(R"(
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ns = number_storage.new(23)
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print("accumulate before:", ns:accumulate())
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-- reference original usertype like a container
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ns_container = ns:iterable()
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ns_container:add(24)
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ns_container:add(25)
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-- now print to show effect
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print("accumulate after :", ns:accumulate())
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)");
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number_storage& ns = lua["ns"];
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number_storage& ns_container = lua["ns_container"];
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assert(&ns == &ns_container);
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assert(ns.size() == 3);
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std::cout << std::endl;
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return 0;
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}
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