Add no_inidex feature to disable arrays and indexing.

src/result.rs

@@ -173,6 +173,12 @@ impl From<ParseError> for EvalAltResult {
     }
 }
 
+impl<T: AsRef<str>> From<T> for EvalAltResult {
+    fn from(err: T) -> Self {
+        Self::ErrorRuntime(err.as_ref().to_string(), Position::none())
+    }
+}
+
 impl EvalAltResult {
     pub fn position(&self) -> Position {
         match self {
@@ -225,9 +231,3 @@ impl EvalAltResult {
         }
     }
 }
-
-impl<T: AsRef<str>> From<T> for EvalAltResult {
-    fn from(err: T) -> Self {
-        Self::ErrorRuntime(err.as_ref().to_string(), Position::none())
-    }
-}