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

calculators/builder-adversary/run-02/calc.py

@@ -0,0 +1,33 @@
+#!/usr/bin/env python3
+"""Calculator CLI: python calc.py "<expression>"""
+import sys
+
+from calc.lexer import tokenize, LexError
+from calc.parser import parse, ParseError
+from calc.evaluator import evaluate, EvalError
+
+
+def _fmt(value) -> str:
+    """Return value as int string if whole, else as float string."""
+    if isinstance(value, float) and value.is_integer():
+        return str(int(value))
+    return str(value)
+
+
+def main():
+    if len(sys.argv) != 2:
+        print("usage: calc.py <expression>", file=sys.stderr)
+        sys.exit(1)
+    expr = sys.argv[1]
+    try:
+        tokens = tokenize(expr)
+        ast = parse(tokens)
+        result = evaluate(ast)
+        print(_fmt(result))
+    except (LexError, ParseError, EvalError) as exc:
+        print(f"error: {exc}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()