From bd3fe0cac583739bc0d7c4b5c8f301bb350abca0 Mon Sep 17 00:00:00 2001
From: Andy Belle-Isle <drumsetmonkey@gmail.com>
Date: Fri, 30 Aug 2019 00:19:31 -0400
Subject: Renamed lib to deps so github will ignore it for language stats

---
 deps/sol2/examples/source/functions.cpp | 82 +++++++++++++++++++++++++++++++++
 1 file changed, 82 insertions(+)
 create mode 100644 deps/sol2/examples/source/functions.cpp

(limited to 'deps/sol2/examples/source/functions.cpp')

diff --git a/deps/sol2/examples/source/functions.cpp b/deps/sol2/examples/source/functions.cpp
new file mode 100644
index 0000000..007dff3
--- /dev/null
+++ b/deps/sol2/examples/source/functions.cpp
@@ -0,0 +1,82 @@
+#define SOL_ALL_SAFETIES_ON 1
+#include <sol/sol.hpp>
+
+#include "assert.hpp"
+#include <iostream>
+
+inline int my_add(int x, int y) {
+	return x + y;
+}
+
+struct multiplier {
+    int operator()(int x) {
+        return x * 10;
+    }
+
+    static int by_five(int x) {
+        return x * 5;
+    }
+};
+
+int main() {
+	std::cout << "=== functions ===" << std::endl;
+
+	sol::state lua;
+	lua.open_libraries(sol::lib::base);
+
+	// setting a function is simple
+	lua.set_function("my_add", my_add);
+
+	// you could even use a lambda
+	lua.set_function("my_mul", [](double x, double y) { return x * y; });
+
+	// member function pointers and functors as well
+	lua.set_function("mult_by_ten", multiplier{});
+	lua.set_function("mult_by_five", &multiplier::by_five);
+
+	// assert that the functions work
+	lua.script("assert(my_add(10, 11) == 21)");
+	lua.script("assert(my_mul(4.5, 10) == 45)");
+	lua.script("assert(mult_by_ten(50) == 500)");
+	lua.script("assert(mult_by_five(10) == 50)");
+
+	// using lambdas, functions can have state.
+	int x = 0;
+	lua.set_function("inc", [&x]() { x += 10; });
+
+	// calling a stateful lambda modifies the value
+	lua.script("inc()");
+	c_assert(x == 10);
+	if (x == 10) {
+		// Do something based on this information
+		std::cout << "Yahoo! x is " << x << std::endl;
+	}
+
+	// this can be done as many times as you want
+	lua.script(R"(
+inc()
+inc()
+inc()
+)");
+	c_assert(x == 40);
+	if (x == 40) {
+		// Do something based on this information
+		std::cout << "Yahoo! x is " << x << std::endl;
+	}
+
+	// retrieval of a function is done similarly
+	// to other variables, using sol::function
+	sol::function add = lua["my_add"];
+	int value = add(10, 11);
+	// second way to call the function
+	int value2 = add.call<int>(10, 11);
+	c_assert(value == 21);
+	c_assert(value2 == 21);
+	if (value == 21 && value2 == 21) {
+		std::cout << "Woo, value is 21!" << std::endl;
+	}
+
+	std::cout << std::endl;
+
+	return 0;
+}
\ No newline at end of file
-- 
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