Started creating scripting library/namespace and added sol2 for interfacing

1 files changed, 50 insertions, 0 deletions

diff --git a/lib/sol2/examples/source/environments.cpp b/lib/sol2/examples/source/environments.cpp
new file mode 100644
index 0000000..0087dea
--- /dev/null
+++ b/lib/sol2/examples/source/environments.cpp
@@ -0,0 +1,50 @@
+#define SOL_ALL_SAFETIES_ON 1
+#include <sol/sol.hpp>
+
+#include <iostream>
+
+void test_environment(std::string key, const sol::environment& env, const sol::state_view& lua) {
+	sol::optional<int> maybe_env_a = env[key];
+	sol::optional<int> maybe_global_a = lua[key];
+	if (maybe_global_a) {
+		std::cout << "\t'" << key << "' is " << maybe_global_a.value() << " in the global environment" << std::endl;
+	}
+	else {
+		std::cout << "\t'" << key << "' does not exist in the global environment" << std::endl;
+	}
+	if (maybe_env_a) {
+		std::cout << "\t'" << key << "' is " << maybe_env_a.value() << " in target environment" << std::endl;
+	}
+	else {
+		std::cout << "\t'" << key << "' does not exist in target environment" << std::endl;
+	}
+}
+
+int main(int, char**) {
+	std::cout << "=== environments ===" << std::endl;
+
+	sol::state lua;
+	// A global variable to see if we can "fallback" into it
+	lua["b"] = 2142;
+
+	// Create a new environment
+	sol::environment plain_env(lua, sol::create);
+	// Use it
+	lua.script("a = 24", plain_env);
+	std::cout << "-- target: plain_env" << std::endl;
+	test_environment("a", plain_env, lua);
+	test_environment("b", plain_env, lua);
+	std::cout << std::endl;
+
+	// Create an environment with a fallback
+	sol::environment env_with_fallback(lua, sol::create, lua.globals());
+	// Use it
+	lua.script("a = 56", env_with_fallback);
+	std::cout << "-- target: env_with_fallback (fallback is global table)" << std::endl;
+	test_environment("a", env_with_fallback, lua);
+	test_environment("b", env_with_fallback, lua);
+	std::cout << std::endl;
+
+
+	return 0;
+}