Add err function for easier error creation

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "charred"
-version = "0.1.5"
+version = "0.1.6"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

src/tapemachine.rs

@@ -48,14 +48,22 @@ impl CharTapeMachine {
         }
     }
 
+    #[inline]
     pub fn get_text(&self) -> Vec<char> {
         self.text.clone()
     }
 
+    #[inline]
     pub fn get_index(&self) -> usize {
         self.index
     }
 
+    /// Creates an error at the current position
+    #[inline]
+    pub fn err(&self) -> TapeError {
+        TapeError::new(self.index)
+    }
+
     /// Returns the next char
     /// if there is any
     pub fn next_char(&mut self) -> Option<char> {