Started creating scripting library/namespace and added sol2 for interfacing

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/sol2/examples/source/stack_aligned_function.cpp b/lib/sol2/examples/source/stack_aligned_function.cpp
new file mode 100644
index 0000000..b2a258a
--- /dev/null
+++ b/lib/sol2/examples/source/stack_aligned_function.cpp
@@ -0,0 +1,34 @@
+#define SOL_ALL_SAFETIES_ON 1
+#include <sol/sol.hpp>
+
+#include "assert.hpp"
+
+int main(int, char*[]) {
+	sol::state lua;
+	lua.script("function func (a, b) return (a + b) * 2 end");
+
+	sol::reference func_ref = lua["func"];
+
+	// for some reason, you need to use the low-level API
+	func_ref.push(); // function on stack now
+
+	// maybe this is in a lua_CFunction you bind,
+	// or maybe you're trying to work with a pre-existing system
+	// maybe you've used a custom lua_load call, or you're working
+	// with state_view's load(lua_Reader, ...) call...
+	// here's a little bit of how you can work with the stack
+	lua_State* L = lua.lua_state();
+	sol::stack_aligned_function func(L, -1);
+	lua_pushinteger(L, 5); // argument 1, using plain API
+	lua_pushinteger(L, 6); // argument 2
+	
+	// take 2 arguments from the top, 
+	// and use "stack_aligned_function" to call
+	int result = func(sol::stack_count(2));
+
+	// make sure everything is clean
+	c_assert(result == 22);
+	c_assert(lua.stack_top() == 0); // stack is empty/balanced
+
+	return 0;
+}