Module highlight 

Syntax highlighting and bracket validation for the narju REPL.

Structs

NarjuHelper

The rustyline helper for the raw λ↑↓ REPL: syntax highlighting, filename completion (for :load), history hints, and bracket validation.

NarjuHelperLite

The rustyline helper for the Purple REPL: highlighting and bracket validation only. See the comment block above for why completion and hinting are stubbed out.

Constants

KEYWORDS

Surface forms rendered in the keyword colour.

Functions

highlight_sexp

Render src with ANSI colours: keywords, literals, numbers, comments, quotes, and brackets each get their own colour.

is_sym_char

Whether c can appear in a symbol, for tokenising during highlighting. Mirrors the reader’s symbol alphabet (crate::parse); the two must agree or highlighting splits tokens differently than the reader does.

validate_brackets

Bracket-balance validator — waits for balanced parens before submitting.