let builtin_symbol s = reset_href (Ast.Literal (`Symbol s))
let keyword k = reset_href (add_keyword_attrs (Ast.Literal (`Keyword k)))
let number s =
let builtin_symbol s = reset_href (Ast.Literal (`Symbol s))
let keyword k = reset_href (add_keyword_attrs (Ast.Literal (`Keyword k)))
let number s =