Function group

regex/regex-syntax/src/ast/parse.rs:2411–2417

Create a capturing group with the given span.

(range: Range<usize>, index: u32, ast: Ast)

    /// Create a capturing group with the given span.
    fn group(range: Range<usize>, index: u32, ast: Ast) -> Ast {
        Ast::Group(ast::Group {
            span: span(range),
            kind: ast::GroupKind::CaptureIndex(index),
            ast: Box::new(ast),
        })
    }

    /// Create an ast::SetFlags.
    ///