package wax-lib

  1. Overview
  2. Docs
Libraries for Wax, a Rust-like syntax for WebAssembly

Install 

dune-project
 Dependency

github.com Readme Changelog Edit opam file Versions (1)

Authors

  1. J
    Jérôme Vouillon

Maintainers

  1. J
    Jérôme Vouillon

Sources

wax-0.1.0.tbz
sha256=41b580846af8d41bdf6c3f005f62e38feda3e60fe2e9e4aa440db34ce515a153
sha512=4b3a181fcc7d743194a8647260870fb5190770066a197bcc48104c2b77fd40c643228b795c2bcd6b29a120820e969eb42a37a9bcec98b3f608d13f152d9f6579

doc/src/wax-lib.utils/styled_printer.ml.html

Source file styled_printer.ml

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type t = {
  printer : Printer.t;
  theme : Colors.theme;
  mutable style_override : Colors.style option;
  trivia : Trivia.t;
  seen : (Ast.location, unit) Hashtbl.t;
  collect : (Ast.location, unit) Hashtbl.t option;
}

let create ~printer ~theme ?collect ~trivia () =
  {
    printer;
    theme;
    style_override = None;
    trivia;
    seen = Hashtbl.create 16;
    collect;
  }

let print_styled t style ?(len = None) text =
  let style = Option.value ~default:style t.style_override in
  let seq = Colors.escape_sequence t.theme style in
  if seq <> "" then Printer.string_as t.printer 0 seq;
  (match len with
  | None -> Printer.string t.printer text
  | Some len -> Printer.string_as t.printer len text);
  if seq <> "" then Printer.string_as t.printer 0 t.theme.reset

let comment t s = print_styled t Comment s

(* Emit a list of trivia entries (comments, blank lines), styling comment text
   with the theme and laying out spacing with the printer. *)
let print_trivia t lst =
  let open Trivia in
  List.iter
    (fun e ->
      match (e.trivia, e.position) with
      | Item { kind = Block_comment; content; _ }, _ ->
          Printer.space t.printer ();
          comment t content;
          Printer.space t.printer ()
      | Item { kind = Line_comment; content; _ }, Inline ->
          (* Trailing comment: defer it past a following separator (e.g. a list
             comma) so the separator stays on this line, ahead of the comment. *)
          Printer.defer_eol t.printer (fun () ->
              Printer.string t.printer " ";
              comment t (String.trim content))
      | Item { kind = Line_comment; content; _ }, Line_start ->
          Printer.newline t.printer ();
          comment t (String.trim content);
          Printer.newline t.printer ()
      | Item { kind = Annotation; _ }, _ -> ()
      | Blank_line, _ -> Printer.blank_line t.printer ())
    lst

let get_trivia t loc = Trivia.get ?collect:t.collect t.trivia ~seen:t.seen loc

let atomic_node t loc f =
  let assoc = get_trivia t loc in
  print_trivia t assoc.before;
  f ();
  print_trivia t assoc.within;
  print_trivia t assoc.after

let with_style t style f =
  match t.style_override with
  | Some _ -> f ()
  | None ->
      t.style_override <- Some style;
      f ();
      t.style_override <- None