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

calculators/builder-adversary-deferred/run-05/calc.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python
+"""calc.py — command-line calculator.
+
+Formatting rule (D3): whole-valued floats are printed as integers
+(4/2 → 2), non-whole floats are printed as-is (7/2 → 3.5).
+"""
+import sys
+
+from calc.lexer import tokenize, LexError
+from calc.parser import parse, ParseError
+from calc.evaluator import evaluate, EvalError
+
+
+def _fmt(value: int | float) -> str:
+    if isinstance(value, float) and value.is_integer():
+        return str(int(value))
+    return str(value)
+
+
+def main() -> None:
+    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(_fmt(result))
+    except (LexError, ParseError, EvalError) as e:
+        print(f"error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()