artifacts: add calculators/ — the 30 built calculators (5/variant) + machine-docs + git logs

calculators/builder-adversary-deferred/run-04/calc.py

@@ -0,0 +1,23 @@
+"""calc.py — command-line calculator: string → tokens → AST → number."""
+
+import sys
+from calc.lexer import tokenize, LexError
+from calc.parser import parse, ParseError
+from calc.evaluator import evaluate, EvalError
+
+
+def main():
+    if len(sys.argv) != 2:
+        print("Usage: calc.py <expression>", file=sys.stderr)
+        sys.exit(1)
+    expr = sys.argv[1]
+    try:
+        result = evaluate(parse(tokenize(expr)))
+        print(result)
+    except (LexError, ParseError, EvalError) as e:
+        print(f"Error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()