Constructors for many of the types updated. sol::object now makes many more styles of types. Tests updated to match. Update documentation as per #87. Close #88. Close #86

docs/source/api/object.rst

@@ -15,11 +15,13 @@ members
 -------
 
 .. code-block:: cpp
-    :caption: constructor: coroutine
+    :caption: overloaded constructor: object
 
-    coroutine(lua_State* L, int index = -1);
+    template <typename T>
+    object(T&&);
+    object(lua_State* L, int index = -1);
 
-Create an object which references the specific element at the given index in the specified ``lua_State*``.
+There are 2 kinds of constructors here. One allows construction of a object from other reference types such as :doc:`table<table>` and :doc:`stack_reference`. The other creates an object which references the specific element at the given index in the specified ``lua_State*``.
 
 .. code-block:: cpp
 	:caption: function: type conversion

docs/source/features.rst

@@ -150,7 +150,7 @@ kaguya -
 * Inspired coroutine support for Sol
 * Library author (satoren) is a nice guy!
 * C++11/14, or boostified (which makes it C++03 compatible)
-* Clas registration is a bit verbose, but not as offensive as OOLua or lua-intf or others
+* Class registration is a bit verbose, but not as offensive as OOLua or lua-intf or others
 * Deserves lots of love!
 
 Sol -
@@ -185,6 +185,7 @@ luawrapper -
 * C++11
 * No macros!
 * The interface can be clunky (no table-like data structures: most things go though ``readVariable`` / ``writeVariable``)
+* Internal Compiler errors in Visual Studio 2015 - submitted a PR to fix it, hopefully it'll get picked up
 
 SWIG (3.0) - 
 
@@ -195,11 +196,11 @@ SWIG (3.0) -
 
 luacppinterface -
 
-* It seems like a decent library, until you try to get a function put into Lua using CreateFunction, and then getting it out again -- it fails miserably
+* The branch that fixes VC++ warnings
 * No member variable support
 * Actually has tables (but no operator[])
 * Does not support arbitrary keys
-* Really has potential, but falls down on its face...
+* Pretty decent
 
 luabind -
 
@@ -207,6 +208,7 @@ luabind -
 * Strange in-lua keywords and parsing to allow for classes to be written in lua
 	- not sure if good feature; vendor lock-in to that library to depend on this specific class syntax?
 * Comprehensive lua bindings (can even bind "properties")
+* There's some code that produces an ICE in Visual C++: I submitted a fix to the library in the hopes that it'll get accepted
 * Wonky table support: no basic conversion functions on ``luabind::object``; have to push object then use lua API to get what you want
 
 lua-api-pp -
@@ -238,7 +240,7 @@ luwra -
 
 * Mentioned here because... well, it's a thing
 * Lightweight (read: feature-starved) wrapper library
-* Can push/pop to the global namespace, but doing anymore more detailed is... harder
+* Can push/pop to the global namespace, but doing anymthing more detailed is... harder
 * Might as well go with luawrapper if you're going to bother
 
 

sol/function.hpp

@@ -70,6 +70,8 @@ public:
     basic_function& operator=(const basic_function&) = default;
     basic_function(basic_function&&) = default;
     basic_function& operator=(basic_function&&) = default;
+    basic_function(const stack_reference& r) : basic_function(r.lua_state(), r.stack_index()) {}
+    basic_function(stack_reference&& r) : basic_function(r.lua_state(), r.stack_index()) {}
     basic_function(lua_State* L, int index = -1): base_t(L, index) {
 #ifdef SOL_CHECK_ARGUMENTS
         stack::check<basic_function>(L, index, type_panic);

sol/load_result.hpp

@@ -80,7 +80,7 @@ namespace sol {
         load_result(load_result&& o) : L(o.L), index(o.index), returncount(o.returncount), popcount(o.popcount), err(o.err) {
             // Must be manual, otherwise destructor will screw us
             // return count being 0 is enough to keep things clean
-            // but will be thorough
+            // but we will be thorough
             o.L = nullptr;
             o.index = 0;
             o.returncount = 0;
@@ -95,7 +95,7 @@ namespace sol {
             err = o.err;
             // Must be manual, otherwise destructor will screw us
             // return count being 0 is enough to keep things clean
-            // but will be thorough
+            // but we will be thorough
             o.L = nullptr;
             o.index = 0;
             o.returncount = 0;

sol/object.hpp

@@ -54,8 +54,17 @@ private:
     }
 
 public:
-    using base_t::base_t;
-    using base_t::lua_state;
+    basic_object() noexcept = default;
+    template <typename T, meta::EnableIf<meta::Not<std::is_same<meta::Unqualified<T>, basic_object>>, std::is_base_of<base_t, meta::Unqualified<T>>> = 0>
+    basic_object(T&& r) : base_t(std::forward<T>(r)) {}
+    basic_object(nil_t r) : base_t(r) {}
+    basic_object(const basic_object&) = default;
+    basic_object(basic_object&&) = default;
+    basic_object& operator=(const basic_object&) = default;
+    basic_object& operator=(basic_object&&) = default;
+    basic_object(const stack_reference& r) noexcept : basic_object(r.lua_state(), r.stack_index()) {}
+    basic_object(stack_reference&& r) noexcept : basic_object(r.lua_state(), r.stack_index()) {}
+    basic_object(lua_State* L, int index = -1) noexcept : base_t(L, index) {}
 
     template<typename T>
     decltype(auto) as() const {

sol/protected_function.hpp

@@ -137,6 +137,8 @@ public:
     basic_protected_function& operator=(basic_protected_function&& ) = default;
     basic_protected_function(const basic_function<base_t>& b) : base_t(b) {}
     basic_protected_function(basic_function<base_t>&& b) : base_t(std::move(b)) {}
+    basic_protected_function(const stack_reference& r) : basic_protected_function(r.lua_state(), r.stack_index()) {}
+    basic_protected_function(stack_reference&& r) : basic_protected_function(r.lua_state(), r.stack_index()) {}
     basic_protected_function(lua_State* L, int index = -1) : base_t(L, index), error_handler(get_default_handler()) {
 #ifdef SOL_CHECK_ARGUMENTS
         stack::check<basic_protected_function>(L, index, type_panic);

sol/protected_function_result.hpp

@@ -81,7 +81,7 @@ public:
     protected_function_result(protected_function_result&& o) : L(o.L), index(o.index), returncount(o.returncount), popcount(o.popcount), err(o.err) {
         // Must be manual, otherwise destructor will screw us
         // return count being 0 is enough to keep things clean
-        // but will be thorough
+        // but we will be thorough
         o.L = nullptr;
         o.index = 0;
         o.returncount = 0;
@@ -96,7 +96,7 @@ public:
         err = o.err;
         // Must be manual, otherwise destructor will screw us
         // return count being 0 is enough to keep things clean
-        // but will be thorough
+        // but we will be thorough
         o.L = nullptr;
         o.index = 0;
         o.returncount = 0;

sol/reference.hpp

@@ -72,6 +72,7 @@ protected:
 
 public:
     reference() noexcept = default;
+    reference(nil_t) noexcept : reference() {}
     reference(const stack_reference& r) noexcept : reference(r.lua_state(), r.stack_index()) {}
     reference(stack_reference&& r) noexcept : reference(r.lua_state(), r.stack_index()) {}
     reference(lua_State* L, int index = -1) noexcept : L(L) {

sol/stack_check.hpp

@@ -257,7 +257,7 @@ struct checker<T, type::userdata, C> {
             handler(L, index, type::userdata, indextype);
             return false;
         }
-        if (meta::Or<std::is_same<T, light_userdata_value>, std::is_same<T, userdata_value>>::value)
+        if (meta::Or<std::is_same<T, light_userdata_value>, std::is_same<T, userdata_value>, std::is_same<T, userdata>, std::is_same<T, lightuserdata>>::value)
             return true;
         if (lua_getmetatable(L, index) == 0) {
              return true;

sol/stack_reference.hpp

@@ -35,6 +35,7 @@ protected:
 
 public:
     stack_reference() noexcept = default;
+    stack_reference(nil_t) noexcept : stack_reference() {};
     stack_reference(lua_State* L, int i) noexcept : L(L), index(lua_absindex(L, i)) {}
     stack_reference(stack_reference&& o) noexcept = default;
     stack_reference& operator=(stack_reference&&) noexcept = default;

sol/table_core.hpp

@@ -156,7 +156,12 @@ public:
     typedef iterator const_iterator;
 
     basic_table_core( ) noexcept : base_t( ) { }
-    basic_table_core( const table_core<true>& global ) noexcept : base_t( global ) { }
+    template <typename T, meta::EnableIf<meta::Bool<!top_level>, meta::Not<std::is_same<meta::Unqualified<T>, basic_table_core>>, std::is_same<meta::Unqualified<T>, global_table>> = 0>
+    basic_table_core( T&& r ) noexcept : base_t( std::forward<T>(r) ) { }
+    basic_table_core(const basic_table_core&) = default;
+    basic_table_core(basic_table_core&&) = default;
+    basic_table_core& operator=(const basic_table_core&) = default;
+    basic_table_core& operator=(basic_table_core&&) = default;
     basic_table_core(const stack_reference& r) : basic_table_core(r.lua_state(), r.stack_index()) {}
     basic_table_core(stack_reference&& r) : basic_table_core(r.lua_state(), r.stack_index()) {}
     basic_table_core( lua_State* L, int index = -1 ) : base_t( L, index ) {

sol/thread.hpp

@@ -31,6 +31,8 @@ public:
     thread () noexcept = default;
     thread(const thread&) = default;
     thread(thread&&) = default;
+    thread(const stack_reference& r) : thread(r.lua_state(), r.stack_index()) {};
+    thread(stack_reference&& r) : thread(r.lua_state(), r.stack_index()) {};
     thread& operator=(const thread&) = default;
     thread& operator=(thread&&) = default;
     thread(lua_State* L, int index = -1) : reference(L, index) {

tests.cpp

@@ -1138,3 +1138,51 @@ TEST_CASE("usertype/no_constructor", "make sure lua types cannot be constructed
 
     REQUIRE_THROWS(lua.script("t = thing.new()"));
 }
+
+TEST_CASE("object/conversions", "make sure all basic reference types can be made into objects") {
+    sol::state lua;
+    lua.open_libraries(sol::lib::base);
+
+    struct d {};
+
+    lua.script("function f () print('bark') end");
+    lua["d"] = d{};
+    lua["l"] = static_cast<void*>(nullptr);
+
+    sol::table t = lua.create_table();
+    sol::thread th = sol::thread::create(lua);
+    sol::function f = lua["f"];
+    sol::protected_function pf = lua["f"];
+    sol::userdata ud = lua["d"];
+    sol::lightuserdata lud = lua["l"];
+
+    sol::object ot(t);
+    sol::object ot2 = ot;
+    sol::object oth(th);
+    sol::object of(f);
+    sol::object opf(pf);
+    sol::object od(ud);
+    sol::object ol(lud);
+
+    auto oni = sol::make_object(lua, 50);
+    auto ond = sol::make_object(lua, 50.0);
+
+    std::string somestring = "look at this text isn't it nice";
+    auto osl = sol::make_object(lua, "Bark bark bark");
+    auto os = sol::make_object(lua, somestring);
+
+    auto omn = sol::make_object(lua, sol::nil);
+
+    REQUIRE(ot.get_type() == sol::type::table);
+    REQUIRE(ot2.get_type() == sol::type::table);
+    REQUIRE(oth.get_type() == sol::type::thread);
+    REQUIRE(of.get_type() == sol::type::function);
+    REQUIRE(opf.get_type() == sol::type::function);
+    REQUIRE(od.get_type() == sol::type::userdata);
+    REQUIRE(ol.get_type() == sol::type::lightuserdata);
+    REQUIRE(oni.get_type() == sol::type::number);
+    REQUIRE(ond.get_type() == sol::type::number);
+    REQUIRE(osl.get_type() == sol::type::string);
+    REQUIRE(os.get_type() == sol::type::string);
+    REQUIRE(omn.get_type() == sol::type::nil);
+}