Lady’s Gitweb - Codemark/blob - sed/syntax-comment.sed

   1 #!/usr/bin/sed -f
   2 # SPDX-FileCopyrightText: 2026 Lady <https://www.ladys.computer/about/#lady>
   3 # SPDX-License-Identifier: MPL-2.0
   4
   5 ## ⋯ 🧮🖍 Codemark ∷ sed ∷ syntax-comment.sed
   6 ##
   7 ## ⁌ The “syntax comment” Sed program
   8 ##
   9 ## ] Copyright © 2026 Lady [@ Ladys Computer].
  10 ## ]
  11 ## ] This Source Code Form is subject to the terms of the Mozilla
  12 ## ]   Public License, version 2.0.
  13 ## ] If a copy of the M·P·L was not distributed with this file, You
  14 ## ]   can obtain one at {🔗<https://mozilla.org/MPL/2.0/>}.
  15
  16 ## The program begins in the “outside” state.
  17 ## When a line starting with `|´ is encountered, it prints a syntax
  18 ##   comment and switches to the “inside” state.
  19
  20 :outside
  21 /^|/{
  22   s/^|/|⌦syntax:⌫/
  23   b inside
  24 }
  25
  26 ## If the line did not begin with `|´, the program advances and stays
  27 ##   “outside”.
  28
  29 n
  30 b outside
  31
  32 ## Once “inside”, the program advances and switches to “outside” as
  33 ##   soon as it encounters a line which does not begin with a `|´.
  34 ## Otherwise, it stays “inside”.
  35
  36 :inside
  37 n
  38 /^|/!b outside
  39 b inside