tree-sitter-abnf

Tree-sitter grammar for ABNF (Augmented BNF for Syntax Specifications).

Implements RFC 5234 and RFC 7405 (case-sensitive string support).

Features

• Full RFC 5234 ABNF syntax: rules, alternation, concatenation, repetition, groups, options
• RFC 7405 case-sensitive (%s"...") and case-insensitive (%i"...") strings
• Numeric values: binary (%b), decimal (%d), hex (%x) with concatenation (.) and ranges (-)
• Prose values (<...>)
• Continuation lines (newline + indent continues a rule)
• Core rulenames (ALPHA, DIGIT, etc.) as a distinct node type for highlighting
• Accepts both LF and CRLF line endings

Links

• Documentation
• Source
• Mirror