Merge pull request #22 from ThePhD/master

Fixing Issue #21

.gitignore

@@ -18,3 +18,9 @@ liblua.a
 sol/include/
 .ninja*
 include/
+lib/liblua5.2.a
+*.config
+*.creator
+*.files
+*.includes
+main.cpp

main.ninja

@@ -0,0 +1,27 @@
+# This file has been generated by shinobi version 0.9.5
+
+ninja_required_version = 1.3
+builddir = bin
+objdir = obj
+cxx = g++
+cxxflags = -std=c++11 -pedantic -pedantic-errors -Wextra -Wall -O2 -DNDEBUG
+incflags = -I"." -I"./include" -I"." -I"/usr/include/lua5.2" -I"./lua-5.2.2/src/" -I"./Catch/include/"
+linkflags = -static -L"./lib" -llua5.2
+
+rule compile
+    command = $cxx -MMD -MF $out.d $cxxflags -c $in -o $out $incflags
+    deps = gcc
+    depfile = $out.d
+    description = Compiling $in
+
+rule link
+    command = $cxx $in -o $out $linkflags
+    description = Creating $out
+
+build $objdir/main.o: compile main.cpp
+
+build $builddir/tests: link $objdir/main.o
+
+build install: phony $builddir/tests
+
+default install

sol/error.hpp

@@ -19,8 +19,8 @@
 // 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 error_HPP
-#define error_HPP
+#ifndef SOL_ERROR_HPP
+#define SOL_ERROR_HPP
 
 #include <stdexcept>
 #include <string>
@@ -32,4 +32,4 @@ public:
 };
 } // sol
 
-#endif // error_HPP
+#endif // SOL_ERROR_HPP

sol/userdata.hpp

@@ -110,8 +110,9 @@ private:
     template<std::size_t N>
     void build_function_tables() {}
 
-    template<std::size_t N, typename... Args, typename Ret>
-    void build_function_tables(std::string name, Ret T::* func, Args&&... args) {
+    template<std::size_t N, typename... Args, typename TBase, typename Ret>
+    void build_function_tables(std::string name, Ret TBase::* func, Args&&... args) {
+        static_assert(std::is_base_of<TBase, T>::value, "Any registered function must be part of the class");
         typedef typename std::decay<decltype(func)>::type function_type;
         functionnames.push_back(std::move(name));
         functions.emplace_back(detail::make_unique<userdata_function<function_type, T>>(std::move(func)));

tests.cpp

@@ -50,6 +50,27 @@ int plop_xyz(int x, int y, std::string z) {
     return 11;
 }
 
+class Base {
+public:
+    Base(int a_num) : m_num(a_num) { }
+
+    int get_num() {
+        return m_num;
+    }
+
+protected:
+    int m_num;
+};
+
+class Derived : public Base {
+public:
+    Derived(int a_num) : Base(a_num) { }
+
+    int get_num_10() {
+        return 10 * m_num;
+    }
+};
+
 TEST_CASE("simple/set_global", "Check if the set_global works properly.") {
     sol::state lua;
 
@@ -448,3 +469,27 @@ TEST_CASE("tables/userdata utility", "Show internal management of classes regist
     REQUIRE(bresult == 1);
     REQUIRE(cresult == 3);
 }
+
+TEST_CASE("tables/userdata utility derived", "userdata classes must play nice when a derived class does not overload a publically visible base function") {
+    sol::state lua;
+    lua.open_libraries(sol::lib::base);
+    sol::constructors<sol::types<int>> basector;
+    sol::userdata<Base> baseuserdata("Base", basector, "get_num", &Base::get_num);
+
+    lua.set_userdata(baseuserdata);
+
+    lua.script("base = Base.new(5)");
+    lua.script("print(base:get_num())");
+
+    sol::constructors<sol::types<int>> derivedctor;
+    sol::userdata<Derived> deriveduserdata("Derived", derivedctor, "get_num", &Derived::get_num, "get_num_10", &Derived::get_num_10);
+
+    lua.set_userdata(deriveduserdata);
+
+    lua.script("derived = Derived.new(7)");
+    lua.script("dgn10 = derived:get_num_10()\nprint(dgn10)");
+    lua.script("dgn = derived:get_num()\nprint(dgn)");
+
+    REQUIRE((lua.get<int>("dgn10") == 70));
+    REQUIRE((lua.get<int>("dgn") == 7));
+}