regast-syntax 0.1.0

Lossless syntax tree for the regast regular expression engine
Documentation 
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mod dot;
mod json;
mod sexpr;

#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
pub enum JsonShape {
    #[default]
    Tree,
    Arena,
}

pub(super) fn kind_name(kind: &crate::AstKind) -> &'static str {
    match kind {
        crate::AstKind::Empty => "empty",
        crate::AstKind::Anchor { .. } => "anchor",
        crate::AstKind::Literal { .. } => "literal",
        crate::AstKind::Dot => "dot",
        crate::AstKind::Class { .. } => "class",
        crate::AstKind::Group { .. } => "group",
        crate::AstKind::Alt { .. } => "alt",
        crate::AstKind::Concat { .. } => "concat",
        crate::AstKind::Repeat { .. } => "repeat",
    }
}

pub(super) fn rep_name(kind: crate::RepKind) -> String {
    match kind {
        crate::RepKind::ZeroOrOne => "zero_or_one".into(),
        crate::RepKind::ZeroOrMore => "zero_or_more".into(),
        crate::RepKind::OneOrMore => "one_or_more".into(),
        crate::RepKind::Range { min, max } => max.map_or_else(
            || format!("range_{min}_unbounded"),
            |max| format!("range_{min}_{max}"),
        ),
    }
}