Module eval 

Expression parsing and evaluation.

Uses ruff_python_parser to parse Python expression syntax into an AST, then evaluates with a custom bounded evaluator. This mirrors the Python implementation which uses ast.parse() + a custom Evaluator class.

Structs

EvalBuilder

A builder bound to a ParsedExpression that defers choosing symbol tables until evaluate is called.

EvalResult

Result of expression evaluation.

ParsedExpression

A parsed expression ready for evaluation.

Constants

DEFAULT_MEMORY_LIMIT

Default memory limit: 100 million bytes.

DEFAULT_OPERATION_LIMIT

Default operation limit: 10 million.

MAX_EXPRESSION_DEPTH

Maximum permitted AST nesting depth.

MAX_PARSE_INPUT_LEN

Maximum permitted source length (in bytes) for a single ParsedExpression. An absolute cap independent of any AST-shape analysis: the parser’s recursive descent can recurse at most once per input byte, so bounding input length bounds worst-case stack use. Set to a value that leaves generous headroom in a debug-profile build on the parser worker thread (32 MB stack).