Crate harn_lexer 

Structs

FixEdit

A machine-applicable text replacement for autofixing diagnostics.

Lexer

Character-by-character scanner producing tokens.

Span

Source location for error reporting.

Token

A token with its kind and source location.

Enums

LexerError

Lexer errors.

StringSegment

A segment of an interpolated string.

TokenKind

Token kinds produced by the lexer.

Constants

KEYWORDS

Canonical list of Harn language keywords. Single source of truth; the lexer’s identifier-to-keyword match must stay in sync (enforced by test_keywords_const_covers_lexer). External tooling should consume this rather than duplicate it.

Functions

escape_string_literal

Escape value so it round-trips as the body of a double-quoted Harn string literal: the lexer’s escape set (\n, \r, \t, \0, \\, \") plus \$ before { so a value containing ${…} renders as text instead of becoming live interpolation when the generated source is compiled. This is the single source of truth for code generators — the CLI’s harn try scaffolding and the VM’s composition/crystallize codegen had each grown a private copy that forgot ${, letting a value like ${host_call(...)} execute.