Module sorting 

Requirement sorting utilities shared across all interfaces.

Sorts requirements numerically by their number field, keeping sub-requirements (e.g., “a”, “b”) grouped under their parent.

Traits

HasRequirementNumber

Trait for types that have a requirement number string.

Functions

req_number_sort_key

Parse a requirement number into a sortable key. “3a” -> (3, “a”), “a” -> (0, “a”), “10” -> (10, “”)

sort_requirements

Sort a Vec of any type with a requirement number, keeping sub-requirements grouped under their parent.

sorted_indices_by_number

Given requirement number strings, return indices sorted numerically with sub-requirements grouped under their preceding parent.