Add no_inidex feature to disable arrays and indexing.

src/lib.rs

@@ -75,9 +75,12 @@ mod scope;
 
 pub use any::{Any, AnyExt, Dynamic, Variant};
 pub use call::FuncArgs;
-pub use engine::{Array, Engine};
+pub use engine::Engine;
 pub use error::{ParseError, ParseErrorType};
 pub use fn_register::{RegisterDynamicFn, RegisterFn, RegisterResultFn};
 pub use parser::{Position, AST};
 pub use result::EvalAltResult;
 pub use scope::Scope;
+
+#[cfg(not(feature = "no_index"))]
+pub use engine::Array;