Integrated Basic Error Handling.

src/error.rs

@@ -0,0 +1,32 @@
+use std::fmt;
+
+#[derive(Debug)]
+pub enum Error {
+    SyntaxError(String),
+    IndexOutOfBounds(String),
+    VariableNotDeclared(String),
+    VariableAlreadyDeclared(String),
+    TypeError(String),
+    UnsupportedOperation(String),
+    BreakOutsideLoop,
+    ContinueOutsideLoop,
+    //UnknownError(String),
+}
+
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Error::SyntaxError(msg) => write!(f, "SyntaxError: {}", msg),
+            Error::IndexOutOfBounds(msg) => write!(f, "IndexOutOfBounds: {}", msg),
+            Error::VariableNotDeclared(msg) => write!(f, "VariableNotDeclared: {}", msg),
+            Error::VariableAlreadyDeclared(msg) => write!(f, "VariableAlreadyDeclared: {}", msg),
+            Error::TypeError(msg) => write!(f, "TypeError: {}", msg),
+            Error::UnsupportedOperation(msg) => write!(f, "UnsupportedOperation: {}", msg),
+            Error::BreakOutsideLoop => write!(f, "Break statement outside of loop"),
+            Error::ContinueOutsideLoop => write!(f, "Continue statement outside of loop"),
+            // Error::UnknownError(msg) => write!(f, "UnknownError: {}", msg),
+        }
+    }
+}
+
+impl std::error::Error for Error {}