🐐 Fractions

cent

@@ -10,8 +10,12 @@ Options:
     -c          Run the compiler
     FILE        The file to compile/interpret
 """
-from docopt import docopt
+import sys
 
+from docopt import docopt
+from rply.errors import LexingError
+
+from centvrion.errors import CentvrionError
 from centvrion.lexer import Lexer
 from centvrion.parser import Parser
 from centvrion.ast_nodes import Program
@@ -25,13 +29,20 @@ def main():
     lexer = Lexer().get_lexer()
     parser = Parser()
 
-    tokens = lexer.lex(program_text)
-
-    program = parser.parse(tokens)
+    try:
+        tokens = lexer.lex(program_text)
+        program = parser.parse(tokens)
+    except LexingError as e:
+        pos = e.source_pos
+        char = program_text[pos.idx] if pos.idx < len(program_text) else "?"
+        sys.exit(f"CENTVRION error: Invalid character {char!r} at line {pos.lineno}, column {pos.colno}")
 
     if isinstance(program, Program):
         if args["-i"]:
-            program.eval()
+            try:
+                program.eval()
+            except CentvrionError as e:
+                sys.exit(f"CENTVRION error: {e}")
         else:
             raise Exception("Compiler not implemented")
     else: