Revert "Refine examples."

This reverts commit 146129279c.

examples/arrays_and_structs.rs

@@ -1,6 +1,3 @@
-#![cfg(not(feature = "no_index"))]
-#![cfg(not(feature = "no_object"))]
-
 use rhai::{Engine, EvalAltResult};
 
 #[derive(Debug, Clone)]
@@ -17,6 +14,8 @@ impl TestStruct {
     }
 }
 
+#[cfg(not(feature = "no_index"))]
+#[cfg(not(feature = "no_object"))]
 fn main() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();
 
@@ -47,3 +46,8 @@ fn main() -> Result<(), Box<EvalAltResult>> {
 
     Ok(())
 }
+
+#[cfg(any(feature = "no_index", feature = "no_object"))]
+fn main() {
+    panic!("This example does not run under 'no_index' or 'no_object'.")
+}

examples/custom_types_and_methods.rs

@@ -1,5 +1,3 @@
-#![cfg(not(feature = "no_object"))]
-
 use rhai::{Engine, EvalAltResult};
 
 #[derive(Debug, Clone)]
@@ -17,6 +15,7 @@ impl TestStruct {
     }
 }
 
+#[cfg(not(feature = "no_object"))]
 fn main() -> Result<(), Box<EvalAltResult>> {
     let mut engine = Engine::new();
 
@@ -37,3 +36,8 @@ fn main() -> Result<(), Box<EvalAltResult>> {
 
     Ok(())
 }
+
+#[cfg(feature = "no_object")]
+fn main() {
+    panic!("This example does not run under 'no_object'.");
+}

examples/serde.rs

@@ -1,6 +1,19 @@
-#![cfg(feature = "serde")]
-#![cfg(not(feature = "no_object"))]
+#[cfg(any(not(feature = "serde"), feature = "no_object"))]
+fn main() {
+    println!("This example requires the 'serde' feature to run.");
+    println!("Try: cargo run --features serde --example serde");
+}
 
+#[cfg(feature = "serde")]
+#[cfg(not(feature = "no_object"))]
+fn main() {
+    example::ser();
+    println!();
+    example::de();
+}
+
+#[cfg(feature = "serde")]
+#[cfg(not(feature = "no_object"))]
 mod example {
     use rhai::serde::{from_dynamic, to_dynamic};
     use rhai::{Dynamic, Engine, Map};
@@ -75,9 +88,3 @@ mod example {
         println!("Deserialized to struct: {:#?}", x);
     }
 }
-
-fn main() {
-    example::ser();
-    println!();
-    example::de();
-}

examples/strings.rs

@@ -1,7 +1,5 @@
 ///! This example registers a variety of functions that operate on strings.
 ///! Remember to use `ImmutableString` or `&str` instead of `String` as parameters.
-#![cfg(not(feature = "no_object"))]
-
 use rhai::{Engine, EvalAltResult, ImmutableString, Scope};
 use std::io::{stdin, stdout, Write};
 
@@ -66,10 +64,10 @@ fn main() -> Result<(), Box<EvalAltResult>> {
         engine.run_with_scope(
             &mut scope,
             r#"
-                display("Length", x.len);
+                display("Length", x.len());
                 x.trim();
                 display("Trimmed", x);
-                display("Trimmed Length", x.len);
+                display("Trimmed Length", x.len());
                 display("Index of \"!!!\"", x.index_of("!!!"));
             "#,
         )?;