Module format 

Structured diagnostic formatting for CLI output.

Provides format_diagnostic() which renders a crate::error::ParseError together with the relevant source line and a caret underline pointing at the error location.

Functions

compute_line_starts

Precompute line start offsets for O(1) source line lookup.

format_diagnostic

Format a parse error with source-context display for CLI output.

format_diagnostics

Computes line starts once and reuses for multiple errors.