# Commands covered:  regexp, regsub

 #

 # This file contains a collection of tests for one or more of the Tcl

 # built-in commands.  Sourcing this file into Tcl runs the tests and

 # generates output for errors.  No output means no errors were found.

 #

 # Copyright (c) 1991-1993 The Regents of the University of California.

 # Copyright (c) 1998 Sun Microsystems, Inc.

 # Copyright (c) 1998-1999 by Scriptics Corporation.

 #

 # See the file "license.terms" for information on usage and redistribution

 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.

 #

 # RCS: @(#) $Id: regexp.test,v 1.22.2.3 2003/10/14 18:22:10 vincentdarley Exp $

 if {[lsearch [namespace children] ::tcltest] == -1} {

     package require tcltest 2

     namespace import -force ::tcltest::*

 }

 catch {unset foo}

 test regexp-1.1 {basic regexp operation} {

     regexp ab*c abbbc

 } 1

 test regexp-1.2 {basic regexp operation} {

     regexp ab*c ac

 } 1

 test regexp-1.3 {basic regexp operation} {

     regexp ab*c ab

 } 0

 test regexp-1.4 {basic regexp operation} {

     regexp -- -gorp abc-gorpxxx

 } 1

 test regexp-1.5 {basic regexp operation} {

     regexp {^([^ ]*)[ ]*([^ ]*)} "" a

 } 1

 test regexp-1.6 {basic regexp operation} {

     list [catch {regexp {} abc} msg] $msg

 } {0 1}

 test regexp-1.7 {regexp utf compliance} {

     # if not UTF-8 aware, result is "0 1"

     set foo "\u4e4eb q"

     regexp "\u4e4eb q" "a\u4e4eb qw\u5e4e\x4e wq" bar

     list [string compare $foo $bar] [regexp 4 $bar]

 } {0 0}

 test regexp-2.1 {getting substrings back from regexp} {

     set foo {}

     list [regexp ab*c abbbbc foo] $foo

 } {1 abbbbc}

 test regexp-2.2 {getting substrings back from regexp} {

     set foo {}

     set f2 {}

     list [regexp a(b*)c abbbbc foo f2] $foo $f2

 } {1 abbbbc bbbb}

 test regexp-2.3 {getting substrings back from regexp} {

     set foo {}

     set f2 {}

     list [regexp a(b*)(c) abbbbc foo f2] $foo $f2

 } {1 abbbbc bbbb}

 test regexp-2.4 {getting substrings back from regexp} {

     set foo {}

     set f2 {}

     set f3 {}

     list [regexp a(b*)(c) abbbbc foo f2 f3] $foo $f2 $f3

 } {1 abbbbc bbbb c}

 test regexp-2.5 {getting substrings back from regexp} {

     set foo {}; set f1 {}; set f2 {}; set f3 {}; set f4 {}; set f5 {};

     set f6 {}; set f7 {}; set f8 {}; set f9 {}; set fa {}; set fb {};

     list [regexp (1*)(2*)(3*)(4*)(5*)(6*)(7*)(8*)(9*)(a*)(b*) \

 	      12223345556789999aabbb \

 	    foo f1 f2 f3 f4 f5 f6 f7 f8 f9 fa fb] $foo $f1 $f2 $f3 $f4 $f5 \

 	    $f6 $f7 $f8 $f9 $fa $fb

 } {1 12223345556789999aabbb 1 222 33 4 555 6 7 8 9999 aa bbb}

 test regexp-2.6 {getting substrings back from regexp} {

     set foo 2; set f2 2; set f3 2; set f4 2

     list [regexp (a)(b)? xay foo f2 f3 f4] $foo $f2 $f3 $f4

 } {1 a a {} {}}

 test regexp-2.7 {getting substrings back from regexp} {

     set foo 1; set f2 1; set f3 1; set f4 1

     list [regexp (a)(b)?(c) xacy foo f2 f3 f4] $foo $f2 $f3 $f4

 } {1 ac a {} c}

 test regexp-2.8 {getting substrings back from regexp} {

     set match {}

     list [regexp {^a*b} aaaab match] $match

 } {1 aaaab}

 test regexp-2.9 {getting substrings back from regexp} {

     set foo {}

     set f2 {}

     list [regexp f\352te(b*)c f\352tebbbbc foo f2] $foo $f2

 } [list 1 f\352tebbbbc bbbb]

 test regexp-2.10 {getting substrings back from regexp} {

     set foo {}

     set f2 {}

     list [regexp f\352te(b*)c eff\352tebbbbc foo f2] $foo $f2

 } [list 1 f\352tebbbbc bbbb]

 test regexp-3.1 {-indices option to regexp} {

     set foo {}

     list [regexp -indices ab*c abbbbc foo] $foo

 } {1 {0 5}}

 test regexp-3.2 {-indices option to regexp} {

     set foo {}

     set f2 {}

     list [regexp -indices a(b*)c abbbbc foo f2] $foo $f2

 } {1 {0 5} {1 4}}

 test regexp-3.3 {-indices option to regexp} {

     set foo {}

     set f2 {}

     list [regexp -indices a(b*)(c) abbbbc foo f2] $foo $f2

 } {1 {0 5} {1 4}}

 test regexp-3.4 {-indices option to regexp} {

     set foo {}

     set f2 {}

     set f3 {}

     list [regexp -indices a(b*)(c) abbbbc foo f2 f3] $foo $f2 $f3

 } {1 {0 5} {1 4} {5 5}}

 test regexp-3.5 {-indices option to regexp} {

     set foo {}; set f1 {}; set f2 {}; set f3 {}; set f4 {}; set f5 {};

     set f6 {}; set f7 {}; set f8 {}; set f9 {}

     list [regexp -indices (1*)(2*)(3*)(4*)(5*)(6*)(7*)(8*)(9*) \

 	    12223345556789999 \

 	    foo f1 f2 f3 f4 f5 f6 f7 f8 f9] $foo $f1 $f2 $f3 $f4 $f5 \

 	    $f6 $f7 $f8 $f9

 } {1 {0 16} {0 0} {1 3} {4 5} {6 6} {7 9} {10 10} {11 11} {12 12} {13 16}}

 test regexp-3.6 {getting substrings back from regexp} {

     set foo 2; set f2 2; set f3 2; set f4 2

     list [regexp -indices (a)(b)? xay foo f2 f3 f4] $foo $f2 $f3 $f4

 } {1 {1 1} {1 1} {-1 -1} {-1 -1}}

 test regexp-3.7 {getting substrings back from regexp} {

     set foo 1; set f2 1; set f3 1; set f4 1

     list [regexp -indices (a)(b)?(c) xacy foo f2 f3 f4] $foo $f2 $f3 $f4

 } {1 {1 2} {1 1} {-1 -1} {2 2}}

 test regexp-4.1 {-nocase option to regexp} {

     regexp -nocase foo abcFOo

 } 1

 test regexp-4.2 {-nocase option to regexp} {

     set f1 22

     set f2 33

     set f3 44

     list [regexp -nocase {a(b*)([xy]*)z} aBbbxYXxxZ22 f1 f2 f3] $f1 $f2 $f3

 } {1 aBbbxYXxxZ Bbb xYXxx}

 test regexp-4.3 {-nocase option to regexp} {

     regexp -nocase FOo abcFOo

 } 1

 set x abcdefghijklmnopqrstuvwxyz1234567890

 set x $x$x$x$x$x$x$x$x$x$x$x$x

 test regexp-4.4 {case conversion in regexp} {

     list [regexp -nocase $x $x foo] $foo

 } "1 $x"

 catch {unset x}

 test regexp-5.1 {exercise cache of compiled expressions} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     regexp .*a bbba

 } 1

 test regexp-5.2 {exercise cache of compiled expressions} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     regexp .*b xxxb

 } 1

 test regexp-5.3 {exercise cache of compiled expressions} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     regexp .*c yyyc

 } 1

 test regexp-5.4 {exercise cache of compiled expressions} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     regexp .*d 1d

 } 1

 test regexp-5.5 {exercise cache of compiled expressions} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     regexp .*e xe

 } 1

 test regexp-6.1 {regexp errors} {

     list [catch {regexp a} msg] $msg

 } {1 {wrong # args: should be "regexp ?switches? exp string ?matchVar? ?subMatchVar subMatchVar ...?"}}

 test regexp-6.2 {regexp errors} {

     list [catch {regexp -nocase a} msg] $msg

 } {1 {wrong # args: should be "regexp ?switches? exp string ?matchVar? ?subMatchVar subMatchVar ...?"}}

 test regexp-6.3 {regexp errors} {

     list [catch {regexp -gorp a} msg] $msg

 } {1 {bad switch "-gorp": must be -all, -about, -indices, -inline, -expanded, -line, -linestop, -lineanchor, -nocase, -start, or --}}

 test regexp-6.4 {regexp errors} {

     list [catch {regexp a( b} msg] $msg

 } {1 {couldn't compile regular expression pattern: parentheses () not balanced}}

 test regexp-6.5 {regexp errors} {

     list [catch {regexp a( b} msg] $msg

 } {1 {couldn't compile regular expression pattern: parentheses () not balanced}}

 test regexp-6.6 {regexp errors} {

     list [catch {regexp a a f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1 f1} msg] $msg

 } {0 1}

 test regexp-6.7 {regexp errors} {

     list [catch {regexp (x)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.) xyzzy} msg] $msg

 } {0 0}

 test regexp-6.8 {regexp errors} {

     catch {unset f1}

     set f1 44

     list [catch {regexp abc abc f1(f2)} msg] $msg

 } {1 {couldn't set variable "f1(f2)"}}

 test regexp-6.9 {regexp errors, -start bad int check} {

     list [catch {regexp -start bogus {^$} {}} msg] $msg

 } {1 {expected integer but got "bogus"}}

 test regexp-7.1 {basic regsub operation} {

     list [regsub aa+ xaxaaaxaa 111&222 foo] $foo

 } {1 xax111aaa222xaa}

 test regexp-7.2 {basic regsub operation} {

     list [regsub aa+ aaaxaa &111 foo] $foo

 } {1 aaa111xaa}

 test regexp-7.3 {basic regsub operation} {

     list [regsub aa+ xaxaaa 111& foo] $foo

 } {1 xax111aaa}

 test regexp-7.4 {basic regsub operation} {

     list [regsub aa+ aaa 11&2&333 foo] $foo

 } {1 11aaa2aaa333}

 test regexp-7.5 {basic regsub operation} {

     list [regsub aa+ xaxaaaxaa &2&333 foo] $foo

 } {1 xaxaaa2aaa333xaa}

 test regexp-7.6 {basic regsub operation} {

     list [regsub aa+ xaxaaaxaa 1&22& foo] $foo

 } {1 xax1aaa22aaaxaa}

 test regexp-7.7 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {1\122\1} foo] $foo

 } {1 xax1aa22aaxaa}

 test regexp-7.8 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {1\\\122\1} foo] $foo

 } "1 {xax1\\aa22aaxaa}"

 test regexp-7.9 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {1\\122\1} foo] $foo

 } "1 {xax1\\122aaxaa}"

 test regexp-7.10 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {1\\&\1} foo] $foo

 } "1 {xax1\\aaaaaxaa}"

 test regexp-7.11 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {1\&\1} foo] $foo

 } {1 xax1&aaxaa}

 test regexp-7.12 {basic regsub operation} {

     list [regsub a(a+) xaxaaaxaa {\1\1\1\1&&} foo] $foo

 } {1 xaxaaaaaaaaaaaaaaxaa}

 test regexp-7.13 {basic regsub operation} {

     set foo xxx

     list [regsub abc xyz 111 foo] $foo

 } {0 xyz}

 test regexp-7.14 {basic regsub operation} {

     set foo xxx

     list [regsub ^ xyz "111 " foo] $foo

 } {1 {111 xyz}}

 test regexp-7.15 {basic regsub operation} {

     set foo xxx

     list [regsub -- -foo abc-foodef "111 " foo] $foo

 } {1 {abc111 def}}

 test regexp-7.16 {basic regsub operation} {

     set foo xxx

     list [regsub x "" y foo] $foo

 } {0 {}}

 test regexp-7.17 {regsub utf compliance} {

     # if not UTF-8 aware, result is "0 1"

     set foo "xyz555ijka\u4e4ebpqr"

     regsub a\u4e4eb xyza\u4e4ebijka\u4e4ebpqr 555 bar

     list [string compare $foo $bar] [regexp 4 $bar]

 } {0 0}

 test regexp-8.1 {case conversion in regsub} {

     list [regsub -nocase a(a+) xaAAaAAay & foo] $foo

 } {1 xaAAaAAay}

 test regexp-8.2 {case conversion in regsub} {

     list [regsub -nocase a(a+) xaAAaAAay & foo] $foo

 } {1 xaAAaAAay}

 test regexp-8.3 {case conversion in regsub} {

     set foo 123

     list [regsub a(a+) xaAAaAAay & foo] $foo

 } {0 xaAAaAAay}

 test regexp-8.4 {case conversion in regsub} {

     set foo 123

     list [regsub -nocase a CaDE b foo] $foo

 } {1 CbDE}

 test regexp-8.5 {case conversion in regsub} {

     set foo 123

     list [regsub -nocase XYZ CxYzD b foo] $foo

 } {1 CbD}

 test regexp-8.6 {case conversion in regsub} {

     set x abcdefghijklmnopqrstuvwxyz1234567890

     set x $x$x$x$x$x$x$x$x$x$x$x$x

     set foo 123

     list [regsub -nocase $x $x b foo] $foo

 } {1 b}

 test regexp-9.1 {-all option to regsub} {

     set foo 86

     list [regsub -all x+ axxxbxxcxdx |&| foo] $foo

 } {4 a|xxx|b|xx|c|x|d|x|}

 test regexp-9.2 {-all option to regsub} {

     set foo 86

     list [regsub -nocase -all x+ aXxXbxxcXdx |&| foo] $foo

 } {4 a|XxX|b|xx|c|X|d|x|}

 test regexp-9.3 {-all option to regsub} {

     set foo 86

     list [regsub x+ axxxbxxcxdx |&| foo] $foo

 } {1 a|xxx|bxxcxdx}

 test regexp-9.4 {-all option to regsub} {

     set foo 86

     list [regsub -all bc axxxbxxcxdx |&| foo] $foo

 } {0 axxxbxxcxdx}

 test regexp-9.5 {-all option to regsub} {

     set foo xxx

     list [regsub -all node "node node more" yy foo] $foo

 } {2 {yy yy more}}

 test regexp-9.6 {-all option to regsub} {

     set foo xxx

     list [regsub -all ^ xxx 123 foo] $foo

 } {1 123xxx}

 test regexp-10.1 {expanded syntax in regsub} {

     set foo xxx

     list [regsub -expanded ". \#comment\n  . \#comment2" abc def foo] $foo

 } {1 defc}

 test regexp-10.2 {newline sensitivity in regsub} {

     set foo xxx

     list [regsub -line {^a.*b$} "dabc\naxyb\n" 123 foo] $foo

 } "1 {dabc\n123\n}"

 test regexp-10.3 {newline sensitivity in regsub} {

     set foo xxx

     list [regsub -line {^a.*b$} "dabc\naxyb\nxb" 123 foo] $foo

 } "1 {dabc\n123\nxb}"

 test regexp-10.4 {partial newline sensitivity in regsub} {

     set foo xxx

     list [regsub -lineanchor {^a.*b$} "da\naxyb\nxb" 123 foo] $foo

 } "1 {da\n123}"

 test regexp-10.5 {inverse partial newline sensitivity in regsub} {

     set foo xxx

     list [regsub -linestop {a.*b} "da\nbaxyb\nxb" 123 foo] $foo

 } "1 {da\nb123\nxb}"

 test regexp-11.1 {regsub errors} {

     list [catch {regsub a b} msg] $msg

 } {1 {wrong # args: should be "regsub ?switches? exp string subSpec ?varName?"}}

 test regexp-11.2 {regsub errors} {

     list [catch {regsub -nocase a b} msg] $msg

 } {1 {wrong # args: should be "regsub ?switches? exp string subSpec ?varName?"}}

 test regexp-11.3 {regsub errors} {

     list [catch {regsub -nocase -all a b} msg] $msg

 } {1 {wrong # args: should be "regsub ?switches? exp string subSpec ?varName?"}}

 test regexp-11.4 {regsub errors} {

     list [catch {regsub a b c d e f} msg] $msg

 } {1 {wrong # args: should be "regsub ?switches? exp string subSpec ?varName?"}}

 test regexp-11.5 {regsub errors} {

     list [catch {regsub -gorp a b c} msg] $msg

 } {1 {bad switch "-gorp": must be -all, -nocase, -expanded, -line, -linestop, -lineanchor, -start, or --}}

 test regexp-11.6 {regsub errors} {

     list [catch {regsub -nocase a( b c d} msg] $msg

 } {1 {couldn't compile regular expression pattern: parentheses () not balanced}}

 test regexp-11.7 {regsub errors} {

     catch {unset f1}

     set f1 44

     list [catch {regsub -nocase aaa aaa xxx f1(f2)} msg] $msg

 } {1 {couldn't set variable "f1(f2)"}}

 test regexp-11.8 {regsub errors, -start bad int check} {

     list [catch {regsub -start bogus pattern string rep var} msg] $msg

 } {1 {expected integer but got "bogus"}}

 test regexp-11.9 {regsub without final variable name returns value} {

     regsub b abaca X

 } {aXaca}

 test regexp-11.10 {regsub without final variable name returns value} {

     regsub -all a abaca X

 } {XbXcX}

 test regexp-11.11 {regsub without final variable name returns value} {

     regsub b(.*?)d abcdeabcfde {,&,\1,}

 } {a,bcd,c,eabcfde}

 test regexp-11.12 {regsub without final variable name returns value} {

     regsub -all b(.*?)d abcdeabcfde {,&,\1,}

 } {a,bcd,c,ea,bcfd,cf,e}

 # This test crashes on the Mac unless you increase the Stack Space to about 1

 # Meg.  This is probably bigger than most users want... 

 # 8.2.3 regexp reduced stack space requirements, but this should be

 # tested again

 test regexp-12.1 {Tcl_RegExpExec: large number of subexpressions} {macCrash} {

     list [regexp (.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.)(.) abcdefghijklmnopqrstuvwxyz all a b c d e f g h i j k l m n o p q r s t u v w x y z] $all $a $b $c $d $e $f $g $h $i $j $k $l $m $n $o $p $q $r $s $t $u $v $w $x $y $z

 } {1 abcdefghijklmnopqrstuvwxyz a b c d e f g h i j k l m n o p q r s t u v w x y z}

 test regexp-13.1 {regsub of a very large string} {

     # This test is designed to stress the memory subsystem in order

     # to catch Bug #933.  It only fails if the Tcl memory allocator

     # is in use.

     set line {BEGIN_TABLE ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; END_TABLE}

     set filedata [string repeat $line 200]

     for {set i 1} {$i<10} {incr i} {

 	regsub -all "BEGIN_TABLE " $filedata "" newfiledata

     }

     set x done

 } {done}

 test regexp-14.1 {CompileRegexp: regexp cache} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     set x .

     append x *a

     regexp $x bbba

 } 1

 test regexp-14.2 {CompileRegexp: regexp cache, different flags} {

     regexp .*a b

     regexp .*b c

     regexp .*c d

     regexp .*d e

     regexp .*e f

     set x .

     append x *a

     regexp -nocase $x bbba

 } 1

 testConstraint exec [llength [info commands exec]]

 test regexp-14.3 {CompileRegexp: regexp cache, empty regexp and empty cache} -constraints {

 	exec

 } -setup {

     set junk [makeFile {puts [regexp {} foo]} junk.tcl]

 } -body {

     exec [interpreter] $junk

 } -cleanup {

     removeFile junk.tcl

 } -result 1

 test regexp-15.1 {regexp -start} {

     catch {unset x}

     list [regexp -start -10 {\d} 1abc2de3 x] $x

 } {1 1}

 test regexp-15.2 {regexp -start} {

     catch {unset x}

     list [regexp -start 2 {\d} 1abc2de3 x] $x

 } {1 2}

 test regexp-15.3 {regexp -start} {

     catch {unset x}

     list [regexp -start 4 {\d} 1abc2de3 x] $x

 } {1 2}

 test regexp-15.4 {regexp -start} {

     catch {unset x}

     list [regexp -start 5 {\d} 1abc2de3 x] $x

 } {1 3}

 test regexp-15.5 {regexp -start, over end of string} {

     catch {unset x}

     list [regexp -start [string length 1abc2de3] {\d} 1abc2de3 x] [info exists x]

 } {0 0}

 test regexp-15.6 {regexp -start, loss of ^$ behavior} {

     list [regexp -start 2 {^$} {}]

 } {0}

 test regexp-16.1 {regsub -start} {

     catch {unset x}

     list [regsub -all -start 2 {\d} a1b2c3d4e5 {/&} x] $x

 } {4 a1b/2c/3d/4e/5}

 test regexp-16.2 {regsub -start} {

     catch {unset x}

     list [regsub -all -start -25 {z} hello {/&} x] $x

 } {0 hello}

 test regexp-16.3 {regsub -start} {

     catch {unset x}

     list [regsub -all -start 3 {z} hello {/&} x] $x

 } {0 hello}

 test regexp-16.4 {regsub -start, \A behavior} {

     set out {}

     lappend out [regsub -start 0 -all {\A(\w)} {abcde} {/\1} x] $x

     lappend out [regsub -start 2 -all {\A(\w)} {abcde} {/\1} x] $x

 } {5 /a/b/c/d/e 3 ab/c/d/e}

 test regexp-17.1 {regexp -inline} {

     regexp -inline b ababa

 } {b}

 test regexp-17.2 {regexp -inline} {

     regexp -inline (b) ababa

 } {b b}

 test regexp-17.3 {regexp -inline -indices} {

     regexp -inline -indices (b) ababa

 } {{1 1} {1 1}}

 test regexp-17.4 {regexp -inline} {

     regexp -inline {\w(\d+)\w} "   hello 23 there456def "

 } {e456d 456}

 test regexp-17.5 {regexp -inline no matches} {

     regexp -inline {\w(\d+)\w} ""

 } {}

 test regexp-17.6 {regexp -inline no matches} {

     regexp -inline hello goodbye

 } {}

 test regexp-17.7 {regexp -inline, no matchvars allowed} {

     list [catch {regexp -inline b abc match} msg] $msg

 } {1 {regexp match variables not allowed when using -inline}}

 test regexp-18.1 {regexp -all} {

     regexp -all b bbbbb

 } {5}

 test regexp-18.2 {regexp -all} {

     regexp -all b abababbabaaaaaaaaaab

 } {6}

 test regexp-18.3 {regexp -all -inline} {

     regexp -all -inline b abababbabaaaaaaaaaab

 } {b b b b b b}

 test regexp-18.4 {regexp -all -inline} {

     regexp -all -inline {\w(\w)} abcdefg

 } {ab b cd d ef f}

 test regexp-18.5 {regexp -all -inline} {

     regexp -all -inline {\w(\w)$} abcdefg

 } {fg g}

 test regexp-18.6 {regexp -all -inline} {

     regexp -all -inline {\d+} 10:20:30:40

 } {10 20 30 40}

 test regexp-18.7 {regexp -all -inline} {

     list [catch {regexp -all -inline b abc match} msg] $msg

 } {1 {regexp match variables not allowed when using -inline}}

 test regexp-18.8 {regexp -all} {

     # This should not cause an infinite loop

     regexp -all -inline {a*} a

 } {a}

 test regexp-18.9 {regexp -all} {

     # Yes, the expected result is {a {}}.  Here's why:

     # Start at index 0; a* matches the "a" there then stops.

     # Go to index 1; a* matches the lambda (or {}) there then stops.  Recall

     #   that a* matches zero or more "a"'s; thus it matches the string "b", as

     #   there are zero or more "a"'s there.

     # Go to index 2; this is past the end of the string, so stop.

     regexp -all -inline {a*} ab

 } {a {}}

 test regexp-18.10 {regexp -all} {

     # Yes, the expected result is {a {} a}.  Here's why:

     # Start at index 0; a* matches the "a" there then stops.

     # Go to index 1; a* matches the lambda (or {}) there then stops.   Recall

     #   that a* matches zero or more "a"'s; thus it matches the string "b", as

     #   there are zero or more "a"'s there.

     # Go to index 2; a* matches the "a" there then stops.

     # Go to index 3; this is past the end of the string, so stop.

     regexp -all -inline {a*} aba

 } {a {} a}

 test regexp-18.11 {regexp -all} {

     regexp -all -inline {^a} aaaa

 } {a}

 test regexp-18.12 {regexp -all -inline -indices} {

     regexp -all -inline -indices a(b(c)d|e(f)g)h abcdhaefgh

 } {{0 4} {1 3} {2 2} {-1 -1} {5 9} {6 8} {-1 -1} {7 7}}

 test regexp-19.1 {regsub null replacement} {

     regsub -all {@} {@hel@lo@} "\0a\0" result

     list $result [string length $result]

 } "\0a\0hel\0a\0lo\0a\0 14"

 test regexp-20.1 {regsub shared object shimmering} {

     # Bug #461322

     set a abcdefghijklmnopqurstuvwxyz 

     set b $a 

     set c abcdefghijklmnopqurstuvwxyz0123456789 

     regsub $a $c $b d 

     list $d [string length $d] [string bytelength $d]

 } [list abcdefghijklmnopqurstuvwxyz0123456789 37 37]

 test regexp-20.2 {regsub shared object shimmering with -about} {

     eval regexp -about abc

 } {0 {}}

 test regexp-21.1 {regsub works with empty string} {

     regsub -- ^ {} foo

 } {foo}

 test regexp-21.2 {regsub works with empty string} {

     regsub -- \$ {} foo

 } {foo}

 test regexp-21.3 {regsub works with empty string offset} {

     regsub -start 0 -- ^ {} foo

 } {foo}

 test regexp-21.4 {regsub works with empty string offset} {

     regsub -start 0 -- \$ {} foo

 } {foo}

 test regexp-21.5 {regsub works with empty string offset} {

     regsub -start 3 -- \$ {123} foo

 } {123foo}

 test regexp-21.6 {regexp works with empty string} {

     regexp -- ^ {}

 } {1}

 test regexp-21.7 {regexp works with empty string} {

     regexp -start 0 -- ^ {}

 } {1}

 test regexp-21.8 {regexp works with empty string offset} {

     regexp -start 3 -- ^ {123}

 } {0}

 test regexp-21.9 {regexp works with empty string offset} {

     regexp -start 3 -- \$ {123}

 } {1}

 test regexp-21.10 {multiple matches handle newlines} {

     regsub -all -lineanchor -- {^#[^\n]*\n} "#one\n#two\n#three\n" foo\n

 } "foo\nfoo\nfoo\n"

 test regexp-21.11 {multiple matches handle newlines} {

     regsub -all -line -- ^ "a\nb\nc" \#

 } "\#a\n\#b\n\#c"

 test regexp-21.12 {multiple matches handle newlines} {

     regsub -all -line -- ^ "\n\n" \#

 } "\#\n\#\n\#"

 test regexp-21.13 {multiple matches handle newlines} {

     regexp -all -inline -indices -line -- ^ "a\nb\nc"

 } {{0 -1} {2 1} {4 3}}

 # cleanup

 ::tcltest::cleanupTests

 return