Started creating scripting library/namespace and added sol2 for interfacing

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/sol2/examples/source/protected_functions.cpp b/lib/sol2/examples/source/protected_functions.cpp
new file mode 100644
index 0000000..7e217fc
--- /dev/null
+++ b/lib/sol2/examples/source/protected_functions.cpp
@@ -0,0 +1,47 @@
+#define SOL_ALL_SAFETIES_ON 1
+#include <sol/sol.hpp>
+
+#include <iostream>
+
+int main() {
+	std::cout << "=== protected_functions ===" << std::endl;
+
+	sol::state lua;
+	lua.open_libraries(sol::lib::base);
+
+	// A complicated function which can error out
+	// We define both in terms of Lua code
+
+	lua.script(R"(
+			function handler (message)
+				return "Handled this message: " .. message
+			end
+
+			function f (a)
+				if a < 0 then
+					error("negative number detected")
+				end
+				return a + 5
+			end
+		)");
+
+	// Get a protected function out of Lua
+	sol::protected_function f(lua["f"], lua["handler"]);
+
+	sol::protected_function_result result = f(-500);
+	if (result.valid()) {
+		// Call succeeded
+		int x = result;
+		std::cout << "call succeeded, result is " << x << std::endl;
+	}
+	else {
+		// Call failed
+		sol::error err = result;
+		std::string what = err.what();
+		std::cout << "call failed, sol::error::what() is " << what << std::endl;
+		// 'what' Should read 
+		// "Handled this message: negative number detected"
+	}
+
+	std::cout << std::endl;
+}