Module default_library 

Default function library with all built-in signatures.

Registers signatures for all operators, functions, and properties defined in the expression language spec. Implementations are placeholders — the evaluator’s hardcoded match arms handle actual evaluation. The library is used for static type checking via derive_return_type.

Functions

register_host_context_functions

Register host-context-only functions (e.g. apply_path_mapping).

register_unresolved_host_context_functions