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d0934df1f2
* libguile/snarf.h (SCM_IMMUTABLE_STRINGBUF): Remove shared flag.
Stringbufs are immutable by default.
* libguile/strings.c: Rewrite blurb. Change to have stringbufs be
immutable by default and mutable only when marked as such. Going
mutable means making a private copy.
(STRINGBUF_MUTABLE, STRINGBUF_F_MUTABLE): New definitions.
(SET_STRINGBUF_SHARED): Remove.
(scm_i_print_stringbuf): Simplify to just alias the stringbuf as-is.
(substring_with_immutable_stringbuf): New helper.
(scm_i_substring, scm_i_substring_read_only, scm_i_substring_copy):
use new helper.
(scm_i_string_ensure_mutable_x): New helper.
(scm_i_substring_shared): Use scm_i_string_ensure_mutable_x.
(stringbuf_write_mutex): Remove; yaaaaaaaay.
(scm_i_string_start_writing): Use scm_i_string_ensure_mutable_x. No
more mutex.
(scm_i_string_stop_writing): Now a no-op.
(scm_i_make_symbol): Use substring/copy.
(scm_sys_string_dump, scm_sys_symbol_dump): Update.
* libguile/strings.h (SCM_I_STRINGBUF_F_SHARED): Remove.
(SCM_I_STRINGBUF_F_MUTABLE): Add.
* module/system/vm/assembler.scm (link-data): Don't add shared flag any
more. Existing compiled flags are harmless tho.
* test-suite/tests/strings.test ("string internals"): Update.
687 lines
20 KiB
Scheme
687 lines
20 KiB
Scheme
;;;; strings.test --- test suite for Guile's string functions -*- scheme -*-
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;;;; Jim Blandy <jimb@red-bean.com> --- August 1999
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;;;;
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;;;; Copyright (C) 1999, 2001, 2004-2006, 2008-2011, 2013,
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;;;; 2015 Free Software Foundation, Inc.
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;;;;
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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(define-module (test-strings)
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#:use-module ((system base compile) #:select (compile))
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#:use-module (test-suite lib))
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(define exception:read-only-string
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(cons 'misc-error "^string is read-only"))
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(define exception:illegal-escape
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(cons 'read-error "illegal character in escape sequence"))
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;; Wrong types may have either the 'wrong-type-arg key when
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;; interpreted or 'vm-error when compiled. This matches both.
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(define exception:wrong-type-arg
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(cons #t "Wrong type"))
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;; Create a string from integer char values, eg. (string-ints 65) => "A"
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(define (string-ints . args)
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(apply string (map integer->char args)))
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;;
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;; string internals
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;;
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;; Some abbreviations
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;; BMP - Basic Multilingual Plane (codepoints below U+FFFF)
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;; SMP - Suplementary Multilingual Plane (codebpoints from U+10000 to U+1FFFF)
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(with-test-prefix "string internals"
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(pass-if "new string starts at 1st char in stringbuf"
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(let ((s "abc"))
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(= 0 (assq-ref (%string-dump s) 'start))))
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(pass-if "length of new string same as stringbuf"
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(let ((s "def"))
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(= (string-length s) (assq-ref (%string-dump s) 'stringbuf-length))))
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(pass-if "contents of new string same as stringbuf"
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(let ((s "ghi"))
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(string=? s (assq-ref (%string-dump s) 'stringbuf-chars))))
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(pass-if "writable strings are not read-only"
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(let ((s "zyx"))
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(not (assq-ref (%string-dump s) 'read-only))))
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(pass-if "read-only strings are read-only"
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(let ((s (substring/read-only "zyx" 0)))
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(assq-ref (%string-dump s) 'read-only)))
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(pass-if "new Latin-1 encoded strings are not shared"
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(let ((s "abc"))
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(not (assq-ref (%string-dump s) 'stringbuf-shared))))
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(pass-if "new UCS-4 encoded strings are not shared"
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(let ((s "\u0100bc"))
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(not (assq-ref (%string-dump s) 'stringbuf-shared))))
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;; Should this be true? It isn't currently true.
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(pass-if "null shared substrings are shared"
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(let* ((s1 "")
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(s2 (substring/shared s1 0 0)))
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(throw 'untested)
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(eq? (assq-ref (%string-dump s2) 'shared)
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s1)))
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(pass-if "ASCII shared substrings are shared"
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(let* ((s1 "foobar")
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(s2 (substring/shared s1 0 3)))
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(eq? (assq-ref (%string-dump s2) 'shared)
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s1)))
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(pass-if "BMP shared substrings are shared"
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(let* ((s1 "\u0100\u0101\u0102\u0103\u0104\u0105")
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(s2 (substring/shared s1 0 3)))
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(eq? (assq-ref (%string-dump s2) 'shared)
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s1)))
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(pass-if "null substrings are not shared"
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(let* ((s1 "")
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(s2 (substring s1 0 0)))
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(not (eq? (assq-ref (%string-dump s2) 'shared)
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s1))))
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(pass-if "ASCII substrings are not shared"
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(let* ((s1 "foobar")
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(s2 (substring s1 0 3)))
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(not (eq? (assq-ref (%string-dump s2) 'shared)
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s1))))
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(pass-if "BMP substrings are not shared"
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(let* ((s1 "\u0100\u0101\u0102\u0103\u0104\u0105")
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(s2 (substring s1 0 3)))
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(not (eq? (assq-ref (%string-dump s2) 'shared)
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s1))))
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(pass-if "ASCII substrings immutable before copy-on-write"
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(let* ((s1 "foobar")
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(s2 (substring s1 0 3)))
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(and (not (assq-ref (%string-dump s1) 'stringbuf-mutable))
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(not (assq-ref (%string-dump s2) 'stringbuf-mutable)))))
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(pass-if "BMP substrings immutable before copy-on-write"
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(let* ((s1 "\u0100\u0101\u0102\u0103\u0104\u0105")
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(s2 (substring s1 0 3)))
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(and (not (assq-ref (%string-dump s1) 'stringbuf-mutable))
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(not (assq-ref (%string-dump s2) 'stringbuf-mutable)))))
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(pass-if "ASCII base string still immutable after copy-on-write"
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(let* ((s1 "foobar")
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(s2 (substring s1 0 3)))
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(string-set! s2 0 #\F)
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(and (not (assq-ref (%string-dump s1) 'stringbuf-mutable))
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(assq-ref (%string-dump s2) 'stringbuf-mutable))))
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(pass-if "BMP base string still immutable after copy-on-write"
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(let* ((s1 "\u0100\u0101\u0102\u0103\u0104\u0105")
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(s2 (substring s1 0 3)))
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(string-set! s2 0 #\F)
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(and (not (assq-ref (%string-dump s1) 'stringbuf-mutable))
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(assq-ref (%string-dump s2) 'stringbuf-mutable))))
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(pass-if "ASCII substrings mutable after shared mutation"
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(let* ((s1 "foobar")
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(s2 (substring/shared s1 0 3)))
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(string-set! s2 0 #\F)
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(and (assq-ref (%string-dump s1) 'stringbuf-mutable)
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(assq-ref (%string-dump s2) 'stringbuf-mutable))))
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(pass-if "BMP substrings mutable after shared mutation"
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(let* ((s1 "\u0100\u0101\u0102\u0103\u0104\u0105")
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(s2 (substring/shared s1 0 3)))
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(string-set! s2 0 #\F)
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(and (assq-ref (%string-dump s1) 'stringbuf-mutable)
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(assq-ref (%string-dump s2) 'stringbuf-mutable))))
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(with-test-prefix "encodings"
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(pass-if "null strings are Latin-1 encoded"
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(let ((s ""))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "ASCII strings are Latin-1 encoded"
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(let ((s "jkl"))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "Latin-1 strings are Latin-1 encoded"
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(let ((s "\xC0\xC1\xC2"))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "BMP strings are UCS-4 encoded"
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(let ((s "\u0100\u0101\x0102"))
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(assq-ref (%string-dump s) 'stringbuf-wide)))
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(pass-if "SMP strings are UCS-4 encoded"
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(let ((s "\U010300\u010301\x010302"))
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(assq-ref (%string-dump s) 'stringbuf-wide)))
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(pass-if "null list->string is Latin-1 encoded"
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(let ((s (string-ints)))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "ASCII list->string is Latin-1 encoded"
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(let ((s (string-ints 65 66 67)))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "Latin-1 list->string is Latin-1 encoded"
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(let ((s (string-ints #xc0 #xc1 #xc2)))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))
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(pass-if "BMP list->string is UCS-4 encoded"
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(let ((s (string-ints #x0100 #x0101 #x0102)))
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(assq-ref (%string-dump s) 'stringbuf-wide)))
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(pass-if "SMP list->string is UCS-4 encoded"
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(let ((s (string-ints #x010300 #x010301 #x010302)))
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(assq-ref (%string-dump s) 'stringbuf-wide)))
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(pass-if "encoding of string not based on escape style"
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(let ((s "\U000040"))
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(not (assq-ref (%string-dump s) 'stringbuf-wide))))))
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(with-test-prefix "escapes"
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(pass-if-exception "non-hex char in two-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\x0g\"" read))
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(pass-if-exception "non-hex char in four-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\u000g\"" read))
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(pass-if-exception "non-hex char in six-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\U00000g\"" read))
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(pass-if-exception "premature termination of two-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\x0\"" read))
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(pass-if-exception "premature termination of four-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\u000\"" read))
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(pass-if-exception "premature termination of six-digit hex-escape"
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exception:illegal-escape
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(with-input-from-string "\"\\U00000\"" read))
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(pass-if "extra hex digits ignored for two-digit hex escape"
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(eqv? (string-ref "--\xfff--" 2)
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(integer->char #xff)))
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(pass-if "extra hex digits ignored for four-digit hex escape"
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(eqv? (string-ref "--\u0100f--" 2)
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(integer->char #x0100)))
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(pass-if "extra hex digits ignored for six-digit hex escape"
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(eqv? (string-ref "--\U010300f--" 2)
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(integer->char #x010300)))
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(pass-if "escaped characters match non-escaped ASCII characters"
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(string=? "ABC" "\x41\u0042\U000043"))
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(pass-if "R5RS backslash escapes"
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(string=? "\"\\" (string #\" #\\)))
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(pass-if "R6RS backslash escapes"
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(string=? "\a\b\t\n\v\f\r"
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(string #\alarm #\backspace #\tab #\newline #\vtab
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#\page #\return)))
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(pass-if "Guile extensions backslash escapes"
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(string=? "\0" (string #\nul))))
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;;
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;; string?
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;;
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(with-test-prefix "string?"
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(pass-if "string"
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(string? "abc"))
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(pass-if "symbol"
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(not (string? 'abc))))
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;;
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;; literals
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;;
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(with-test-prefix "literals"
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;; The "Storage Model" section of R5RS reads: "In such systems literal
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;; constants and the strings returned by `symbol->string' are
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;; immutable objects". `eval' doesn't support it yet, but it doesn't
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;; really matter because `eval' doesn't coalesce repeated constants,
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;; unlike the bytecode compiler.
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(pass-if-exception "literals are constant"
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exception:read-only-string
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(compile '(string-set! "literal string" 0 #\x)
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#:from 'scheme
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#:to 'value)))
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;;
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;; string-null?
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;;
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(with-test-prefix "string-null?"
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(pass-if "null string"
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(string-null? ""))
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(pass-if "non-null string"
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(not (string-null? "a")))
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(pass-if "respects \\0"
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(not (string-null? "\0")))
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(pass-if-exception "symbol"
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exception:wrong-type-arg
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(string-null? 'a)))
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;;
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;; string=?
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;;
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(with-test-prefix "string=?"
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(pass-if "respects 1st parameter's string length"
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(not (string=? "foo\0" "foo")))
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(pass-if "respects 2nd paramter's string length"
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(not (string=? "foo" "foo\0")))
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(with-test-prefix "wrong argument type"
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(pass-if-exception "1st argument symbol"
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exception:wrong-type-arg
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(string=? 'a "a"))
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(pass-if-exception "2nd argument symbol"
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exception:wrong-type-arg
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(string=? "a" 'b))
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(pass-if-exception "1st argument EOF"
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exception:wrong-type-arg
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(string=? (with-input-from-string "" read) "b"))
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(pass-if-exception "2nd argument EOF"
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exception:wrong-type-arg
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(string=? "a" (with-input-from-string "" read)))))
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;;
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;; string<?
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;;
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(with-test-prefix "string<?"
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(pass-if "respects string length"
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(and (not (string<? "foo\0a" "foo\0a"))
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(string<? "foo\0a" "foo\0b")))
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(with-test-prefix "wrong argument type"
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(pass-if-exception "1st argument symbol"
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exception:wrong-type-arg
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(string<? 'a "a"))
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(pass-if-exception "2nd argument symbol"
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exception:wrong-type-arg
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(string<? "a" 'b)))
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(pass-if "same as char<?"
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(eq? (char<? (integer->char 0) (integer->char 255))
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(string<? (string-ints 0) (string-ints 255)))))
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;;
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;; string-ci<?
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;;
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(with-test-prefix "string-ci<?"
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(pass-if "respects string length"
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(and (not (string-ci<? "foo\0a" "foo\0a"))
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(string-ci<? "foo\0a" "foo\0b")))
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(with-test-prefix "wrong argument type"
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(pass-if-exception "1st argument symbol"
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exception:wrong-type-arg
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(string-ci<? 'a "a"))
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(pass-if-exception "2nd argument symbol"
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exception:wrong-type-arg
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(string-ci<? "a" 'b)))
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(pass-if "same as char-ci<?"
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(eq? (char-ci<? (integer->char 0) (integer->char 255))
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(string-ci<? (string-ints 0) (string-ints 255)))))
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;;
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;; string<=?
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;;
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(with-test-prefix "string<=?"
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(pass-if "same as char<=?"
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(eq? (char<=? (integer->char 0) (integer->char 255))
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(string<=? (string-ints 0) (string-ints 255)))))
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;;
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;; string-ci<=?
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;;
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(with-test-prefix "string-ci<=?"
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(pass-if "same as char-ci<=?"
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(eq? (char-ci<=? (integer->char 0) (integer->char 255))
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(string-ci<=? (string-ints 0) (string-ints 255)))))
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;;
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;; string>?
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;;
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(with-test-prefix "string>?"
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(pass-if "same as char>?"
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(eq? (char>? (integer->char 0) (integer->char 255))
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(string>? (string-ints 0) (string-ints 255)))))
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;;
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;; string-ci>?
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;;
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(with-test-prefix "string-ci>?"
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(pass-if "same as char-ci>?"
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(eq? (char-ci>? (integer->char 0) (integer->char 255))
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(string-ci>? (string-ints 0) (string-ints 255)))))
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;;
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;; string>=?
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;;
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(with-test-prefix "string>=?"
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(pass-if "same as char>=?"
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(eq? (char>=? (integer->char 0) (integer->char 255))
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(string>=? (string-ints 0) (string-ints 255)))))
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;;
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;; string-ci>=?
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;;
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(with-test-prefix "string-ci>=?"
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(pass-if "same as char-ci>=?"
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(eq? (char-ci>=? (integer->char 0) (integer->char 255))
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(string-ci>=? (string-ints 0) (string-ints 255)))))
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;;
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;; Unicode string normalization forms
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;;
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;;
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;; string-normalize-nfd
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;;
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(with-test-prefix "string-normalize-nfd"
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(pass-if "canonical decomposition is equal?"
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(equal? (string-normalize-nfd "\xe9") "\x65\u0301")))
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;;
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;; string-normalize-nfkd
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;;
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(with-test-prefix "string-normalize-nfkd"
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(pass-if "compatibility decomposition is equal?"
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(equal? (string-normalize-nfkd "\u1e9b\u0323") "s\u0323\u0307")))
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;;
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;; string-normalize-nfc
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;;
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|
|
|
(with-test-prefix "string-normalize-nfc"
|
|
|
|
(pass-if "canonical composition is equal?"
|
|
(equal? (string-normalize-nfc "\x65\u0301") "\xe9")))
|
|
|
|
;;
|
|
;; string-normalize-nfkc
|
|
;;
|
|
|
|
(with-test-prefix "string-normalize-nfkc"
|
|
|
|
(pass-if "compatibility composition is equal?"
|
|
(equal? (string-normalize-nfkc "\u1e9b\u0323") "\u1e69")))
|
|
|
|
;;
|
|
;; string-utf8-length
|
|
;;
|
|
|
|
(with-test-prefix "string-utf8-length"
|
|
|
|
(pass-if-exception "wrong type argument"
|
|
exception:wrong-type-arg
|
|
(string-utf8-length 50))
|
|
|
|
(pass-if-equal 0 (string-utf8-length ""))
|
|
(pass-if-equal 1 (string-utf8-length "\0"))
|
|
(pass-if-equal 5 (string-utf8-length "hello"))
|
|
(pass-if-equal 7 (string-utf8-length "helloλ"))
|
|
(pass-if-equal 9 (string-utf8-length "ሠላም")))
|
|
|
|
;;
|
|
;; string-ref
|
|
;;
|
|
|
|
(with-test-prefix "string-ref"
|
|
|
|
(pass-if-exception "empty string"
|
|
exception:out-of-range
|
|
(string-ref "" 0))
|
|
|
|
(pass-if-exception "empty string and non-zero index"
|
|
exception:out-of-range
|
|
(string-ref "" 123))
|
|
|
|
(pass-if-exception "out of range"
|
|
exception:out-of-range
|
|
(string-ref "hello" 123))
|
|
|
|
(pass-if-exception "negative index"
|
|
exception:out-of-range
|
|
(string-ref "hello" -1))
|
|
|
|
(pass-if "regular string, ASCII char"
|
|
(char=? (string-ref "GNU Guile" 4) #\G))
|
|
|
|
(pass-if "regular string, hex escaped Latin-1 char"
|
|
(char=? (string-ref "--\xff--" 2)
|
|
(integer->char #xff)))
|
|
|
|
(pass-if "regular string, hex escaped BMP char"
|
|
(char=? (string-ref "--\u0100--" 2)
|
|
(integer->char #x0100)))
|
|
|
|
(pass-if "regular string, hex escaped SMP char"
|
|
(char=? (string-ref "--\U010300--" 2)
|
|
(integer->char #x010300))))
|
|
|
|
;;
|
|
;; string-set!
|
|
;;
|
|
|
|
(with-test-prefix "string-set!"
|
|
|
|
(pass-if-exception "empty string"
|
|
exception:out-of-range
|
|
(string-set! (string-copy "") 0 #\x))
|
|
|
|
(pass-if-exception "empty string and non-zero index"
|
|
exception:out-of-range
|
|
(string-set! (string-copy "") 123 #\x))
|
|
|
|
(pass-if-exception "out of range"
|
|
exception:out-of-range
|
|
(string-set! (string-copy "hello") 123 #\x))
|
|
|
|
(pass-if-exception "negative index"
|
|
exception:out-of-range
|
|
(string-set! (string-copy "hello") -1 #\x))
|
|
|
|
(pass-if-exception "read-only string"
|
|
exception:read-only-string
|
|
(string-set! (substring/read-only "abc" 0) 1 #\space))
|
|
|
|
(pass-if "regular string, ASCII char"
|
|
(let ((s (string-copy "GNU guile")))
|
|
(string-set! s 4 #\G)
|
|
(char=? (string-ref s 4) #\G)))
|
|
|
|
(pass-if "regular string, Latin-1 char"
|
|
(let ((s (string-copy "GNU guile")))
|
|
(string-set! s 4 (integer->char #xfe))
|
|
(char=? (string-ref s 4) (integer->char #xfe))))
|
|
|
|
(pass-if "regular string, BMP char"
|
|
(let ((s (string-copy "GNU guile")))
|
|
(string-set! s 4 (integer->char #x0100))
|
|
(char=? (string-ref s 4) (integer->char #x0100))))
|
|
|
|
(pass-if "regular string, SMP char"
|
|
(let ((s (string-copy "GNU guile")))
|
|
(string-set! s 4 (integer->char #x010300))
|
|
(char=? (string-ref s 4) (integer->char #x010300)))))
|
|
|
|
;;
|
|
;; list->string
|
|
;;
|
|
(with-test-prefix "string"
|
|
|
|
(pass-if-exception "convert circular list to string"
|
|
'(wrong-type-arg . "Apply to non-list")
|
|
(let ((foo (list #\a #\b #\c)))
|
|
(set-cdr! (cddr foo) (cdr foo))
|
|
(apply string foo))))
|
|
|
|
(with-test-prefix "string-split"
|
|
|
|
;; in guile 1.6.7 and earlier, character >=128 wasn't matched in the string
|
|
(pass-if "char 255"
|
|
(equal? '("a" "b")
|
|
(string-split (string #\a (integer->char 255) #\b)
|
|
(integer->char 255))))
|
|
|
|
(pass-if "empty string - char"
|
|
(equal? '("")
|
|
(string-split "" #\:)))
|
|
|
|
(pass-if "non-empty - char - no delimiters"
|
|
(equal? '("foobarfrob")
|
|
(string-split "foobarfrob" #\:)))
|
|
|
|
(pass-if "non-empty - char - delimiters"
|
|
(equal? '("foo" "bar" "frob")
|
|
(string-split "foo:bar:frob" #\:)))
|
|
|
|
(pass-if "non-empty - char - leading delimiters"
|
|
(equal? '("" "" "foo" "bar" "frob")
|
|
(string-split "::foo:bar:frob" #\:)))
|
|
|
|
(pass-if "non-empty - char - trailing delimiters"
|
|
(equal? '("foo" "bar" "frob" "" "")
|
|
(string-split "foo:bar:frob::" #\:)))
|
|
|
|
(pass-if "empty string - charset"
|
|
(equal? '("")
|
|
(string-split "" (char-set #\:))))
|
|
|
|
(pass-if "non-empty - charset - no delimiters"
|
|
(equal? '("foobarfrob")
|
|
(string-split "foobarfrob" (char-set #\:))))
|
|
|
|
(pass-if "non-empty - charset - delimiters"
|
|
(equal? '("foo" "bar" "frob")
|
|
(string-split "foo:bar:frob" (char-set #\:))))
|
|
|
|
(pass-if "non-empty - charset - leading delimiters"
|
|
(equal? '("" "" "foo" "bar" "frob")
|
|
(string-split "::foo:bar:frob" (char-set #\:))))
|
|
|
|
(pass-if "non-empty - charset - trailing delimiters"
|
|
(equal? '("foo" "bar" "frob" "" "")
|
|
(string-split "foo:bar:frob::" (char-set #\:))))
|
|
|
|
(pass-if "empty string - pred"
|
|
(equal? '("")
|
|
(string-split "" (negate char-alphabetic?))))
|
|
|
|
(pass-if "non-empty - pred - no delimiters"
|
|
(equal? '("foobarfrob")
|
|
(string-split "foobarfrob" (negate char-alphabetic?))))
|
|
|
|
(pass-if "non-empty - pred - delimiters"
|
|
(equal? '("foo" "bar" "frob")
|
|
(string-split "foo:bar:frob" (negate char-alphabetic?))))
|
|
|
|
(pass-if "non-empty - pred - leading delimiters"
|
|
(equal? '("" "" "foo" "bar" "frob")
|
|
(string-split "::foo:bar:frob" (negate char-alphabetic?))))
|
|
|
|
(pass-if "non-empty - pred - trailing delimiters"
|
|
(equal? '("foo" "bar" "frob" "" "")
|
|
(string-split "foo:bar:frob::" (negate char-alphabetic?)))))
|
|
|
|
(with-test-prefix "substring-move!"
|
|
|
|
(pass-if-exception "substring-move! checks start and end correctly"
|
|
exception:out-of-range
|
|
(substring-move! "sample" 3 0 "test" 3)))
|
|
|
|
(with-test-prefix "substring/shared"
|
|
|
|
(pass-if "modify indirectly"
|
|
(let ((str (string-copy "foofoofoo")))
|
|
(string-upcase! (substring/shared str 3 6))
|
|
(string=? str "fooFOOfoo")))
|
|
|
|
(pass-if "modify cow indirectly"
|
|
(let* ((str1 (string-copy "foofoofoo"))
|
|
(str2 (string-copy str1)))
|
|
(string-upcase! (substring/shared str2 3 6))
|
|
(and (string=? str1 "foofoofoo")
|
|
(string=? str2 "fooFOOfoo"))))
|
|
|
|
(pass-if "modify double indirectly"
|
|
(let* ((str1 (string-copy "foofoofoo"))
|
|
(str2 (substring/shared str1 2 7)))
|
|
(string-upcase! (substring/shared str2 1 4))
|
|
(string=? str1 "fooFOOfoo")))
|
|
|
|
(pass-if "modify cow double indirectly"
|
|
(let* ((str1 "foofoofoo")
|
|
(str2 (substring str1 2 7)))
|
|
(string-upcase! (substring/shared str2 1 4))
|
|
(and (string=? str1 "foofoofoo")
|
|
(string=? str2 "oFOOf")))))
|