yggdrasil-wasi 0.0.0

Yggdrasil Shared Structure
Documentation 
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package peg: core;

world host {
  export types;
  export errors;
  export cst;
  export visitor;
  export listener;
}

interface types {
  record text-range {
    head-offset: u32,
    tail-offset: u32,
  }
  resource language {
    get-language-name: func() -> string;
    get-glob-pattern: func() -> list<string>;
  }
}

interface errors {
  variant parse-error {
    missing-tag(missing-tag),
    fail
  }

  record missing-tag {
    tag: string,
  }
}

interface cst {
  use types.{text-range, language};

  flags snytax-flags {
    /// A leaf node does not have any child nodes
    leaf,
      /// A ignore node does not have tag
    ignore,
    comment,
    comment-inline,
    comment-block,
    comment-documentation,
  }

  resource syntax-rule {
    get-flags: func() -> snytax-flags;
    get-language: func() -> language;
    /// Labeling of nodes
    /// If this is a union node, tag represents branch tag
    /// If this is a class node, tag means node tag
    /// An empty string is equivalent to no tag
    get-tag: func() -> string;
    get-rule-name: func() -> string;
    get-styles: func() -> list<string>;
  }

  resource syntax-node {
    get-range: func() -> text-range;
    get-rule: func() -> syntax-rule;
    get-text: func() -> string;
    has-parent: func() -> bool;
    get-parent: func() -> option<syntax-node>;
    get-ancestors: func(include-self: bool) -> syntax-iterator;
    get-last: func() -> option<syntax-node>;
    get-last-iterator: func(include-self: bool) -> syntax-iterator;
    get-next: func() -> option<syntax-node>;
    get-next-iterator: func(include-self: bool) -> syntax-iterator;
    get-silbing-head: func() -> option<syntax-node>;
    get-sibling-tail: func() -> option<syntax-node>;
    get-siblings: func(reversed: bool) -> syntax-iterator;
    has-child: func() -> bool;
    get-child-head: func() -> option<syntax-node>;
    get-child-tail: func() -> option<syntax-node>;
    get-children: func(reversed: bool) -> syntax-iterator;
    get-descendants: func(depth-first: bool, reversed: bool) -> syntax-iterator;
  }

  resource syntax-iterator {
    last: func() -> option<syntax-node>;
    next: func() -> option<syntax-node>;
    move-head: func();
    move-tail: func();
    skip: func(count: u32);
    reverse: func();
  }
}

interface visitor {

}

interface listener {

}