Improve examples.

examples/arrays_and_structs.rs

@@ -1,29 +1,41 @@
 use rhai::{Engine, EvalAltResult};
 
+#[cfg(not(feature = "no_index"))]
+#[cfg(not(feature = "no_object"))]
+fn main() -> Result<(), Box<EvalAltResult>> {
     #[derive(Debug, Clone)]
     struct TestStruct {
         x: i64,
     }
 
     impl TestStruct {
-    pub fn update(&mut self) {
-        self.x += 1000;
-    }
         pub fn new() -> Self {
             Self { x: 1 }
         }
+        pub fn update(&mut self) {
+            self.x += 1000;
+        }
     }
 
-#[cfg(not(feature = "no_index"))]
-#[cfg(not(feature = "no_object"))]
-fn main() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();
 
     engine
-        .register_type::<TestStruct>()
+        .register_type_with_name::<TestStruct>("TestStruct")
         .register_fn("new_ts", TestStruct::new)
         .register_fn("update", TestStruct::update);
 
+    #[cfg(feature = "metadata")]
+    {
+        println!("Functions registered:");
+
+        engine
+            .gen_fn_signatures(false)
+            .into_iter()
+            .for_each(|func| println!("{}", func));
+
+        println!();
+    }
+
     let result = engine.eval::<TestStruct>(
         "
             let x = new_ts();

examples/custom_types_and_methods.rs

@@ -1,38 +1,61 @@
 use rhai::{Engine, EvalAltResult};
 
+#[cfg(not(feature = "no_object"))]
+fn main() -> Result<(), Box<EvalAltResult>> {
     #[derive(Debug, Clone)]
     struct TestStruct {
         x: i64,
     }
 
     impl TestStruct {
-    pub fn update(&mut self) {
-        self.x += 1000;
-    }
-
         pub fn new() -> Self {
             Self { x: 1 }
         }
+        pub fn update(&mut self) {
+            self.x += 1000;
+        }
+        pub fn calculate(&mut self, data: i64) -> i64 {
+            self.x * data
+        }
+        pub fn get_x(&mut self) -> i64 {
+            self.x
+        }
+        pub fn set_x(&mut self, value: i64) {
+            self.x = value;
+        }
     }
 
-#[cfg(not(feature = "no_object"))]
-fn main() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();
 
     engine
-        .register_type::<TestStruct>()
+        .register_type_with_name::<TestStruct>("TestStruct")
         .register_fn("new_ts", TestStruct::new)
-        .register_fn("update", TestStruct::update);
+        .register_fn("update", TestStruct::update)
+        .register_fn("calc", TestStruct::calculate)
+        .register_get_set("x", TestStruct::get_x, TestStruct::set_x);
 
-    let result = engine.eval::<TestStruct>(
+    #[cfg(feature = "metadata")]
+    {
+        println!("Functions registered:");
+
+        engine
+            .gen_fn_signatures(false)
+            .into_iter()
+            .for_each(|func| println!("{}", func));
+
+        println!();
+    }
+
+    let result = engine.eval::<i64>(
         "
             let x = new_ts();
+            x.x = 42;
             x.update();
-            x
+            x.calc(x.x)
         ",
     )?;
 
-    println!("result: {}", result.x); // prints 1001
+    println!("result: {}", result); // prints 1085764
 
     Ok(())
 }

examples/hello.rs

@@ -7,7 +7,7 @@ fn main() -> Result<(), Box<EvalAltResult>> {
 
     let result = engine.eval::<i64>("40 + 2")?;
 
-    println!("Answer: {}", result); // prints 42
+    println!("The Answer: {}", result); // prints 42
 
     Ok(())
 }