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Fix embarrassing pretty-print bug

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* module/ice-9/pretty-print.scm (pretty-print): We were never indenting
more than 8 spaces.  Doh!
* test-suite/tests/print.test (prints?, "pretty-print"): Add test.
This commit is contained in:
Andy Wingo 2023-08-24 12:10:50 +02:00
parent 19c7969fff
commit 1f724ccd39
2 changed files with 21 additions and 5 deletions
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2
module/ice-9/pretty-print.scm
View file

@ -106,7 +106,7 @@ port directly after OBJ, like (pretty-print OBJ PORT)."
(when (< 0 n)
(put-string port " " 0 (min 8 n))
(when (< 8 n)
(spaces (- 8 n)))))
(spaces (- n 8)))))
(define (indent to)
(let ((col (port-column port)))

24
test-suite/tests/print.test
View file

@ -1,6 +1,6 @@
;;;; -*- coding: utf-8; mode: scheme; -*-
;;;;
;;;; Copyright (C) 2010, 2013, 2014 Free Software Foundation, Inc.
;;;; Copyright (C) 2010, 2013, 2014, 2023 Free Software Foundation, Inc.
;;;;
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@ -23,11 +23,11 @@
(define-syntax prints?
;; #t if EXP prints as RESULT.
(syntax-rules ()
((_ exp result)
((_ exp result arg ...)
(string=? result
(with-output-to-string
(lambda ()
(pretty-print 'exp)))))))
(pretty-print 'exp arg ...)))))))
(define (with-print-options opts thunk)
(let ((saved-options (print-options)))
@ -111,7 +111,23 @@
(pass-if "quasiquote & co."
(prints? (define foo `(bar ,(+ 2 3)))
"(define foo `(bar ,(+ 2 3)))\n")))
"(define foo `(bar ,(+ 2 3)))\n"))
(pass-if "indent"
(prints? (9 (8 (7 (6 (5 (4 (3 (2 (1 (0 0))))))))))
(string-append
"(9\n"
" (8\n"
" (7\n"
" (6\n"
" (5\n"
" (4\n"
" (3\n"
" (2\n"
" (1\n"
" (0\n"
" 0))))))))))\n")
#:width 10)))
(with-test-prefix "truncated-print"