Module helpers 

Common argument extraction helpers for stdlib module functions.

These reduce boilerplate in module implementations by centralising argument-count validation and typed argument extraction with uniform error messages.

Traits

StringResultExt

Extension trait that adds .with_context() to Result<T, String>.

Functions

check_arg_count

Validate that args has exactly expected elements.

contextualize

Format a contextualized error string.

extract_bool_arg

Extract a bool argument at index from args.

extract_float_arg

Extract an f64 argument at index from args.

extract_number_arg

Extract a numeric (i64) argument at index from args.

extract_string_arg

Extract a string argument at index from args.