5 #P = start of string Q = start of substr R = end of substr S = end of string
14 $SIG{__WARN__} = sub {
15 if ($_[0] =~ /^substr outside of string/) {
17 } elsif ($_[0] =~ /^Attempt to use reference as lvalue in substr/) {
19 } elsif ($_[0] =~ /^Use of uninitialized value/) {
26 sub ok { print (($_[1] ? "" : "not ") . "ok $_[0]\n") }
28 $FATAL_MSG = '^substr outside of string' ;
30 ok 1, substr($a,0,3) eq 'abc'; # P=Q R S
31 ok 2, substr($a,3,3) eq 'def'; # P Q R S
32 ok 3, substr($a,6,999) eq 'xyz'; # P Q S R
33 $b = substr($a,999,999) ; # warn # P R Q S
35 eval{substr($a,999,999) = "" ; };# P R Q S
36 ok 5, $@ =~ /$FATAL_MSG/;
37 ok 6, substr($a,0,-6) eq 'abc'; # P=Q R S
38 ok 7, substr($a,-3,1) eq 'x'; # P Q R S
42 ok 8, substr($a,1,3) eq 'abc' ; # P=Q R S
43 ok 9, substr($a,4,3) eq 'def' ; # P Q R S
44 ok 10, substr($a,7,999) eq 'xyz';# P Q S R
45 $b = substr($a,999,999) ; # warn # P R Q S
47 eval{substr($a,999,999) = "" ; } ; # P R Q S
48 ok 12, $@ =~ /$FATAL_MSG/;
49 ok 13, substr($a,1,-6) eq 'abc' ;# P=Q R S
50 ok 14, substr($a,-3,1) eq 'x' ; # P Q R S
54 substr($a,3,3) = 'XYZ';
55 ok 15, $a eq 'abcXYZxyz' ;
57 ok 16, $a eq 'cXYZxyz' ;
58 substr($a,0,0) = 'ab';
59 ok 17, $a eq 'abcXYZxyz' ;
60 substr($a,0,0) = '12345678';
61 ok 18, $a eq '12345678abcXYZxyz' ;
62 substr($a,-3,3) = 'def';
63 ok 19, $a eq '12345678abcXYZdef';
64 substr($a,-3,3) = '<';
65 ok 20, $a eq '12345678abcXYZ<' ;
66 substr($a,-1,1) = '12345678';
67 ok 21, $a eq '12345678abcXYZ12345678' ;
71 ok 22, substr($a,6) eq 'xyz' ; # P Q R=S
72 ok 23, substr($a,-3) eq 'xyz' ; # P Q R=S
73 $b = substr($a,999,999) ; # warning # P R=S Q
75 eval{substr($a,999,999) = "" ; } ; # P R=S Q
76 ok 25, $@ =~ /$FATAL_MSG/;
77 ok 26, substr($a,0) eq 'abcdefxyz' ; # P=Q R=S
78 ok 27, substr($a,9) eq '' ; # P Q=R=S
79 ok 28, substr($a,-11) eq 'abcdefxyz'; # Q P R=S
80 ok 29, substr($a,-9) eq 'abcdefxyz'; # P=Q R=S
84 $b = substr($a,-7, 1) ; # warn # Q R P S
86 eval{substr($a,-7, 1) = "" ; }; # Q R P S
87 ok 31, $@ =~ /$FATAL_MSG/;
88 $b = substr($a,-7,-6) ; # warn # Q R P S
90 eval{substr($a,-7,-6) = "" ; }; # Q R P S
91 ok 33, $@ =~ /$FATAL_MSG/;
92 ok 34, substr($a,-5,-7) eq ''; # R P=Q S
93 ok 35, substr($a, 2,-7) eq ''; # R P Q S
94 ok 36, substr($a,-3,-7) eq ''; # R P Q S
95 ok 37, substr($a, 2,-5) eq ''; # P=R Q S
96 ok 38, substr($a,-3,-5) eq ''; # P=R Q S
97 ok 39, substr($a, 2,-4) eq ''; # P R Q S
98 ok 40, substr($a,-3,-4) eq ''; # P R Q S
99 ok 41, substr($a, 5,-6) eq ''; # R P Q=S
100 ok 42, substr($a, 5,-5) eq ''; # P=R Q S
101 ok 43, substr($a, 5,-3) eq ''; # P R Q=S
102 $b = substr($a, 7,-7) ; # warn # R P S Q
104 eval{substr($a, 7,-7) = "" ; }; # R P S Q
105 ok 45, $@ =~ /$FATAL_MSG/;
106 $b = substr($a, 7,-5) ; # warn # P=R S Q
108 eval{substr($a, 7,-5) = "" ; }; # P=R S Q
109 ok 47, $@ =~ /$FATAL_MSG/;
110 $b = substr($a, 7,-3) ; # warn # P Q S Q
112 eval{substr($a, 7,-3) = "" ; }; # P Q S Q
113 ok 49, $@ =~ /$FATAL_MSG/;
114 $b = substr($a, 7, 0) ; # warn # P S Q=R
116 eval{substr($a, 7, 0) = "" ; }; # P S Q=R
117 ok 51, $@ =~ /$FATAL_MSG/;
119 ok 52, substr($a,-7,2) eq ''; # Q P=R S
120 ok 53, substr($a,-7,4) eq '54'; # Q P R S
121 ok 54, substr($a,-7,7) eq '54321';# Q P R=S
122 ok 55, substr($a,-7,9) eq '54321';# Q P S R
123 ok 56, substr($a,-5,0) eq ''; # P=Q=R S
124 ok 57, substr($a,-5,3) eq '543';# P=Q R S
125 ok 58, substr($a,-5,5) eq '54321';# P=Q R=S
126 ok 59, substr($a,-5,7) eq '54321';# P=Q S R
127 ok 60, substr($a,-3,0) eq ''; # P Q=R S
128 ok 61, substr($a,-3,3) eq '321';# P Q R=S
129 ok 62, substr($a,-2,3) eq '21'; # P Q S R
130 ok 63, substr($a,0,-5) eq ''; # P=Q=R S
131 ok 64, substr($a,2,-3) eq ''; # P Q=R S
132 ok 65, substr($a,0,0) eq ''; # P=Q=R S
133 ok 66, substr($a,0,5) eq '54321';# P=Q R=S
134 ok 67, substr($a,0,7) eq '54321';# P=Q S R
135 ok 68, substr($a,2,0) eq ''; # P Q=R S
136 ok 69, substr($a,2,3) eq '321'; # P Q R=S
137 ok 70, substr($a,5,0) eq ''; # P Q=R=S
138 ok 71, substr($a,5,2) eq ''; # P Q=S R
139 ok 72, substr($a,-7,-5) eq ''; # Q P=R S
140 ok 73, substr($a,-7,-2) eq '543';# Q P R S
141 ok 74, substr($a,-5,-5) eq ''; # P=Q=R S
142 ok 75, substr($a,-5,-2) eq '543';# P=Q R S
143 ok 76, substr($a,-3,-3) eq ''; # P Q=R S
144 ok 77, substr($a,-3,-1) eq '32';# P Q R S
148 ok 78, substr($a,-2,2) eq ''; # Q P=R=S
149 ok 79, substr($a,0,0) eq ''; # P=Q=R=S
150 ok 80, substr($a,0,1) eq ''; # P=Q=S R
151 ok 81, substr($a,-2,3) eq ''; # Q P=S R
152 ok 82, substr($a,-2) eq ''; # Q P=R=S
153 ok 83, substr($a,0) eq ''; # P=Q=R=S
156 ok 84, substr($a,0,-1) eq ''; # R P=Q=S
157 $b = substr($a,-2, 0) ; # warn # Q=R P=S
159 eval{substr($a,-2, 0) = "" ; }; # Q=R P=S
160 ok 86, $@ =~ /$FATAL_MSG/;
162 $b = substr($a,-2, 1) ; # warn # Q R P=S
164 eval{substr($a,-2, 1) = "" ; }; # Q R P=S
165 ok 88, $@ =~ /$FATAL_MSG/;
167 $b = substr($a,-2,-1) ; # warn # Q R P=S
169 eval{substr($a,-2,-1) = "" ; }; # Q R P=S
170 ok 90, $@ =~ /$FATAL_MSG/;
172 $b = substr($a,-2,-2) ; # warn # Q=R P=S
174 eval{substr($a,-2,-2) = "" ; }; # Q=R P=S
175 ok 92, $@ =~ /$FATAL_MSG/;
177 $b = substr($a, 1,-2) ; # warn # R P=S Q
179 eval{substr($a, 1,-2) = "" ; }; # R P=S Q
180 ok 94, $@ =~ /$FATAL_MSG/;
182 $b = substr($a, 1, 1) ; # warn # P=S Q R
184 eval{substr($a, 1, 1) = "" ; }; # P=S Q R
185 ok 96, $@ =~ /$FATAL_MSG/;
187 $b = substr($a, 1, 0) ;# warn # P=S Q=R
189 eval{substr($a, 1, 0) = "" ; }; # P=S Q=R
190 ok 98, $@ =~ /$FATAL_MSG/;
192 $b = substr($a,1) ; # warning # P=R=S Q
194 eval{substr($a,1) = "" ; }; # P=R=S Q
195 ok 100, $@ =~ /$FATAL_MSG/;
199 ok 101, $a eq 'zxcvbnm';
201 ok 102, $a eq 'zxcvbnm';
203 ok 103, $a eq 'zxcvbnm';
204 substr($a,0,2) = 'pq';
205 ok 104, $a eq 'pqcvbnm';
206 substr($a,2,0) = 'r';
207 ok 105, $a eq 'pqrcvbnm';
208 substr($a,8,0) = 'asd';
209 ok 106, $a eq 'pqrcvbnmasd';
210 substr($a,0,2) = 'iop';
211 ok 107, $a eq 'ioprcvbnmasd';
212 substr($a,0,5) = 'fgh';
213 ok 108, $a eq 'fghvbnmasd';
214 substr($a,3,5) = 'jkl';
215 ok 109, $a eq 'fghjklsd';
216 substr($a,3,2) = '1234';
217 ok 110, $a eq 'fgh1234lsd';
220 # with lexicals (and in re-entered scopes)
225 substr($txt, -1) = "X";
226 ok 111, $txt eq "FoX";
229 substr($txt, 0, 1) = "X";
235 # coercion of references
238 substr($s, 0, 1) = 'Foo';
239 ok 113, substr($s,0,7) eq "FooRRAY" && !($w-=2);
242 # check no spurious warnings
245 # check new 4 arg replacement syntax
248 ok 115, substr($a, 0, 3, "") eq "abc" && $a eq "xyz";
249 ok 116, substr($a, 0, 0, "abc") eq "" && $a eq "abcxyz";
250 ok 117, substr($a, 3, -1, "") eq "xy" && $a eq "abcz";
252 ok 118, substr($a, 3, undef, "xy") eq "" && $a eq "abcxyz"
257 ok 119, substr($a, 3, 9999999, "") eq "xyz" && $a eq "abc";
258 eval{substr($a, -99, 0, "") };
259 ok 120, $@ =~ /$FATAL_MSG/;
260 eval{substr($a, 99, 3, "") };
261 ok 121, $@ =~ /$FATAL_MSG/;
263 substr($a, 0, length($a), "foo");
264 ok 122, $a eq "foo" && !$w;
266 # using 4 arg substr as lvalue is a compile time error
267 eval 'substr($a,0,0,"") = "abc"';
268 ok 123, $@ && $@ =~ /Can't modify substr/ && $a eq "foo";
271 ok 124, sub { shift }->(substr($a, 0, 4, "xxxx")) eq 'abcd';
272 ok 125, $a eq 'xxxxefgh';
282 my $x = substr("a\x{263a}b",0);
283 ok 127, length($x) == 3;
285 ok 128, $x eq "\x{263a}";
287 ok 129, length($x) == 2;
288 substr($x,0,1) = "abcd";
289 ok 130, $x eq "abcd\x{263a}";
290 ok 131, length($x) == 5;
292 ok 132, length($x) == 5;
293 ok 133, $x eq "\x{263a}dcba";
296 $z = "21\x{263a}" . $z;
297 ok 134, length($z) == 5;
298 ok 135, $z eq "21\x{263a}10";
301 # replacement should work on magical values
304 tie $data{'a'}, 'Tie::StdScalar'; # makes $data{'a'} magical
305 $data{a} = "firstlast";
306 ok 136, substr($data{'a'}, 0, 5, "") eq "first" && $data{'a'} eq "last";