Add CLI example

Author: jaepil

examples/cli/main.py

@@ -0,0 +1,40 @@
+#
+# Monic Framework
+#
+# Copyright (c) 2024 Cognica, Inc.
+#
+
+import monic
+
+
+def main():
+    parser = monic.expressions.ExpressionsParser()
+    interpreter = monic.expressions.ExpressionsInterpreter()
+
+    # Ctrl-D to exit
+    while True:
+        try:
+            code = input("monic> ")
+            if not code:
+                continue
+        except KeyboardInterrupt:
+            print()
+            continue
+        except EOFError:
+            print()
+            break
+
+        try:
+            tree = parser.parse(code)
+            result = interpreter.execute(tree)
+            if result is not None:
+                print(result)
+        except KeyboardInterrupt:
+            print()
+            continue
+        except Exception as e:  # pylint: disable=broad-except
+            print(e)
+
+
+if __name__ == "__main__":
+    main()