BNFC.Backend.TreeSitter.CFtoTreeSitter

Indent one level of 2 spaces

Create content of grammar.js file

Print rules for comments

Print word section, this section is needed for tree-sitter to do keyword extraction before any parsing/lexing, see https://tree-sitter.github.io/tree-sitter/creating-parsers#keyword-extraction TODO: currently, we just add every user defined token as well as the predefined Ident token to this list to be safe. Ideally, we should enumerate all defined tokens against all occurrences of keywords. Any tokens patterns that could accept a keyword will go into this list. This will require integration of a regex engine.

Print builtin token rules according to their usage

Predefined builtin token rules

Predefined builtin token rules

Predefined builtin token rules

Predefined builtin token rules

Predefined builtin token rules

First print the entrypoint rule, tree-sitter always use the first rule as entrypoint and does not support multi-entrypoint. Then print rest of the rules

Print all other rules except the entrypoint

Check if a set of rules contains internal rules

Generates one or two tree-sitter rule(s) for one non-terminal from CF. Uses choice function from tree-sitter to combine rules for the non-terminal If the non-terminal has internal rules, an internal version of the non-terminal will be created (prefixed with "_" in tree-sitter), and all internal rules will be sectioned as such.

Generate one tree-sitter rule for one defined token

Start a defined symbol block in tree-sitter grammar

Wrap list using tree-sitter fun if the list contains multiple items Returns the only item without wrapping otherwise

Helper for referring to non-terminal names in tree-sitter

Format right hand side into list of strings

Format string for cat name, prefix "_" if the name is for internal rules