| 1 | ## oils_failures_allowed: 1
|
| 2 |
|
| 3 | #### /^.$/
|
| 4 | shopt -s ysh:all
|
| 5 | var pat = ''
|
| 6 |
|
| 7 | setvar pat = /^.$/
|
| 8 | echo pat=$pat
|
| 9 |
|
| 10 | setvar pat = /%start dot %end/
|
| 11 | echo pat=$pat
|
| 12 |
|
| 13 | if ('' ~ pat) { # ERE syntax
|
| 14 | echo yes
|
| 15 | } else {
|
| 16 | echo no
|
| 17 | }
|
| 18 | # $pat is same as pat
|
| 19 | if ('f' ~ pat) { # ERE syntax
|
| 20 | echo yes
|
| 21 | } else {
|
| 22 | echo no
|
| 23 | }
|
| 24 |
|
| 25 | ## STDOUT:
|
| 26 | pat=^.$
|
| 27 | pat=^.$
|
| 28 | no
|
| 29 | yes
|
| 30 | ## END
|
| 31 |
|
| 32 |
|
| 33 | #### /.+/
|
| 34 | shopt -s ysh:all
|
| 35 |
|
| 36 | var pat = /.+/
|
| 37 | echo $pat
|
| 38 |
|
| 39 | var s = 'foo'
|
| 40 | if (s ~ pat) { # ERE syntax
|
| 41 | echo yes
|
| 42 | }
|
| 43 | var empty = ''
|
| 44 | if (empty ~ pat) { echo yes } else { echo no }
|
| 45 | ## STDOUT:
|
| 46 | .+
|
| 47 | yes
|
| 48 | no
|
| 49 | ## END
|
| 50 |
|
| 51 | #### Repeat {1,3} etc.
|
| 52 | var pat = null
|
| 53 |
|
| 54 | setvar pat = /d{2}/
|
| 55 | echo $pat
|
| 56 | setvar pat = /d{1,3}/
|
| 57 | echo $pat
|
| 58 | setvar pat = /d{1,}/
|
| 59 | echo $pat
|
| 60 | setvar pat = /d{,3}/
|
| 61 | echo $pat
|
| 62 |
|
| 63 |
|
| 64 | ## STDOUT:
|
| 65 | [[:digit:]]{2}
|
| 66 | [[:digit:]]{1,3}
|
| 67 | [[:digit:]]{1,}
|
| 68 | [[:digit:]]{,3}
|
| 69 | ## END
|
| 70 |
|
| 71 |
|
| 72 | #### d+ digit+ !d+ !digit+
|
| 73 | shopt -s ysh:all
|
| 74 |
|
| 75 | var pat = ''
|
| 76 |
|
| 77 | setvar pat = /d+/
|
| 78 | echo $pat
|
| 79 | if ('42' ~ pat) { echo yes }
|
| 80 |
|
| 81 | var empty = ''
|
| 82 | if (empty ~ pat) { echo yes } else { echo no }
|
| 83 |
|
| 84 | setvar pat = /digit+/
|
| 85 | echo $pat
|
| 86 | setvar pat = /!d+/
|
| 87 | echo $pat
|
| 88 | setvar pat = /!digit+/
|
| 89 | echo $pat
|
| 90 |
|
| 91 |
|
| 92 | ## STDOUT:
|
| 93 | [[:digit:]]+
|
| 94 | yes
|
| 95 | no
|
| 96 | [[:digit:]]+
|
| 97 | [^[:digit:]]+
|
| 98 | [^[:digit:]]+
|
| 99 | ## END
|
| 100 |
|
| 101 | #### Alternation and sequence
|
| 102 | var pat = ''
|
| 103 | setvar pat = /s d+ | w*/
|
| 104 | echo $pat
|
| 105 | setvar pat = /s d+ or w*/
|
| 106 | echo $pat
|
| 107 | ## STDOUT:
|
| 108 | [[:space:]][[:digit:]]+|[[:alpha:][:digit:]_]*
|
| 109 | [[:space:]][[:digit:]]+|[[:alpha:][:digit:]_]*
|
| 110 | ## END
|
| 111 |
|
| 112 | #### Char Class Ranges
|
| 113 | shopt -s ysh:all
|
| 114 |
|
| 115 | var pat = ''
|
| 116 | setvar pat = /[0-9 a-f]+/
|
| 117 | echo $pat
|
| 118 | # This is equivalent
|
| 119 | setvar pat = /['0' - '9' 'a' - 'f']+/
|
| 120 | echo $pat
|
| 121 |
|
| 122 | if ('0123' ~ pat) { echo yes } else { echo no }
|
| 123 | if ('zzz' ~ pat) { echo yes } else { echo no }
|
| 124 | if ('' ~ pat) { echo yes } else { echo no }
|
| 125 | ## STDOUT:
|
| 126 | [0-9a-f]+
|
| 127 | [0-9a-f]+
|
| 128 | yes
|
| 129 | no
|
| 130 | no
|
| 131 | ## END
|
| 132 |
|
| 133 | #### Char Class Set
|
| 134 | shopt -s ysh:all
|
| 135 | var pat = ''
|
| 136 |
|
| 137 | # This is NOT allowed
|
| 138 | # setvar pat = /[a b c]+/
|
| 139 |
|
| 140 | setvar pat = /['abc']+/
|
| 141 | echo $pat
|
| 142 |
|
| 143 | if ('cbcb' ~ pat) { echo yes } else { echo no }
|
| 144 | if ('0123' ~ pat) { echo yes } else { echo no }
|
| 145 | if ('' ~ pat) { echo yes } else { echo no }
|
| 146 | ## STDOUT:
|
| 147 | [abc]+
|
| 148 | yes
|
| 149 | no
|
| 150 | no
|
| 151 | ## END
|
| 152 |
|
| 153 | #### Range with escaped characters
|
| 154 | shopt -s ysh:all
|
| 155 |
|
| 156 | var pat = null
|
| 157 |
|
| 158 | setvar pat = / [ \x00 - \x0f ] /
|
| 159 | echo $pat | od -A n -t x1
|
| 160 |
|
| 161 | ## STDOUT:
|
| 162 | 5b 00 2d 0f 5d 0a
|
| 163 | ## END
|
| 164 |
|
| 165 |
|
| 166 | #### Group ()
|
| 167 | shopt -s ysh:all
|
| 168 | var pat = ''
|
| 169 |
|
| 170 | setvar pat = /(%start s or d d)/
|
| 171 | echo $pat
|
| 172 |
|
| 173 | if (' foo' ~ pat) { echo yes } else { echo no }
|
| 174 | if ('-00-' ~ pat) { echo yes } else { echo no }
|
| 175 | if ('foo' ~ pat) { echo yes } else { echo no }
|
| 176 |
|
| 177 | ## STDOUT:
|
| 178 | (^[[:space:]]|[[:digit:]][[:digit:]])
|
| 179 | yes
|
| 180 | yes
|
| 181 | no
|
| 182 | ## END
|
| 183 |
|
| 184 | #### Capture is acceptable as a group
|
| 185 | shopt -s ysh:all
|
| 186 | var pat = /<capture %start s | d d>/
|
| 187 | echo $pat
|
| 188 | ## STDOUT:
|
| 189 | (^[[:space:]]|[[:digit:]][[:digit:]])
|
| 190 | ## END
|
| 191 |
|
| 192 | #### literal ''
|
| 193 | shopt -s ysh:all
|
| 194 | var pat = ''
|
| 195 |
|
| 196 | setvar pat = /'abc' 'def'/
|
| 197 | echo $pat
|
| 198 |
|
| 199 | #setvar pat = /'abc' '^ + * ?'/
|
| 200 | #echo $pat
|
| 201 |
|
| 202 | if ('abcde' ~ pat) { echo yes } else { echo no }
|
| 203 | if ('abcdef' ~ pat) { echo yes } else { echo no }
|
| 204 |
|
| 205 | ## STDOUT:
|
| 206 | abcdef
|
| 207 | no
|
| 208 | yes
|
| 209 | ## END
|
| 210 |
|
| 211 | #### Single quotes and splicing (do what "foo $x ${x}" used to)
|
| 212 | shopt -s ysh:all
|
| 213 | var pat = ''
|
| 214 |
|
| 215 | var x = 'x'
|
| 216 | var y = 'y'
|
| 217 | setvar pat = / @x @x 'abc' @x @y /
|
| 218 | echo $pat
|
| 219 |
|
| 220 | if ('xxabcx' ~ pat) { echo yes } else { echo no }
|
| 221 | if ('xxabcxyf' ~ pat) { echo yes } else { echo no }
|
| 222 |
|
| 223 | ## STDOUT:
|
| 224 | xxabcxy
|
| 225 | no
|
| 226 | yes
|
| 227 | ## END
|
| 228 |
|
| 229 | #### @splice
|
| 230 | shopt -s ysh:all
|
| 231 | var d = /d+/;
|
| 232 | var ip = / @d '.' @d '.' @d '.' @d /
|
| 233 | echo $ip
|
| 234 | if ('0.0.0.0' ~ ip) { echo yes } else { echo no }
|
| 235 | if ('0.0.0' ~ ip) { echo yes } else { echo no }
|
| 236 | ## STDOUT:
|
| 237 | [[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+
|
| 238 | yes
|
| 239 | no
|
| 240 | ## END
|
| 241 |
|
| 242 | #### splice with capital letters
|
| 243 | shopt -s ysh:all
|
| 244 | var D = /d+/;
|
| 245 | var ip = / D '.' D '.' D '.' D /
|
| 246 | echo $ip
|
| 247 | if ('0.0.0.0' ~ ip) { echo yes } else { echo no }
|
| 248 | if ('0.0.0' ~ ip) { echo yes } else { echo no }
|
| 249 | ## STDOUT:
|
| 250 | [[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+\.[[:digit:]]+
|
| 251 | yes
|
| 252 | no
|
| 253 | ## END
|
| 254 |
|
| 255 | #### Matching escaped tab character
|
| 256 | shopt -s ysh:all
|
| 257 |
|
| 258 | var lines = :| $'aa\tbb' $'cc\tdd' |
|
| 259 |
|
| 260 | var pat = / ('a' [\t] 'b') /
|
| 261 | write pat=$pat
|
| 262 | write @lines | egrep $pat
|
| 263 |
|
| 264 | ## stdout-json: "pat=(a[\t]b)\naa\tbb\n"
|
| 265 |
|
| 266 | #### Match unicode char
|
| 267 | shopt -s ysh:all
|
| 268 | var pat = / 'a' dot 'b' /
|
| 269 |
|
| 270 | if ('axb' ~ pat ) { echo yes } else { echo no }
|
| 271 |
|
| 272 | # mu character
|
| 273 | if ($'a\xce\xbcb' ~ pat ) { echo yes } else { echo no }
|
| 274 |
|
| 275 | if ('aZZb' ~ pat ) { echo yes } else { echo no }
|
| 276 | ## STDOUT:
|
| 277 | yes
|
| 278 | yes
|
| 279 | no
|
| 280 | ## END
|
| 281 |
|
| 282 | #### Match non-ASCII byte denoted using $'\xff' (TODO: LANG=C)
|
| 283 |
|
| 284 | # NOTE: This pattern doesn't work with en_US.UTF-8. I think the user should
|
| 285 | # set LANG=C or shopt --unset libc_utf8.
|
| 286 |
|
| 287 | shopt -s ysh:all
|
| 288 | var pat = /[ $'\xff' ]/;
|
| 289 |
|
| 290 | echo $pat | od -A n -t x1
|
| 291 | if ($'\xff' ~ pat) { echo yes } else { echo no }
|
| 292 | if ($'\xfe' ~ pat) { echo yes } else { echo no }
|
| 293 |
|
| 294 | ## STDOUT:
|
| 295 | 5b ff 5d 0a
|
| 296 | yes
|
| 297 | no
|
| 298 | ## END
|
| 299 |
|
| 300 | #### Match non-ASCII byte denoted using \xff
|
| 301 | shopt -s ysh:all
|
| 302 | var pat = /[ \xff ]/;
|
| 303 |
|
| 304 | # Show what it translates to
|
| 305 | echo $pat | od -A n -t x1
|
| 306 |
|
| 307 | # TODO: This might require LANG=C to work
|
| 308 | #if ($'\xff' ~ pat) { echo yes } else { echo no }
|
| 309 | #if ($'\xfe' ~ pat) { echo yes } else { echo no }
|
| 310 |
|
| 311 | ## STDOUT:
|
| 312 | 5b ff 5d 0a
|
| 313 | ## END
|
| 314 |
|
| 315 | #### ERE can express Unicode escapes that are in the ASCII range
|
| 316 | shopt -s ysh:all
|
| 317 | var pat = /[ \u{7f} ]/;
|
| 318 |
|
| 319 | echo $pat | od -A n -t x1
|
| 320 | if ($'\x7f' ~ pat) { echo yes } else { echo no }
|
| 321 | if ($'\x7e' ~ pat) { echo yes } else { echo no }
|
| 322 |
|
| 323 | var pat2 = /[ \u{7f} ]/;
|
| 324 | var pat3 = /[ \u{0007f} ]/;
|
| 325 | test "$pat2" = "$pat3" && echo 'equal'
|
| 326 |
|
| 327 | var range = / [ \u{70} - \u{7f} ] /
|
| 328 | if ($'\x70' ~ range) { echo yes } else { echo no }
|
| 329 | if ($'\x69' ~ range) { echo yes } else { echo no }
|
| 330 |
|
| 331 | ## STDOUT:
|
| 332 | 5b 7f 5d 0a
|
| 333 | yes
|
| 334 | no
|
| 335 | equal
|
| 336 | yes
|
| 337 | no
|
| 338 | ## END
|
| 339 |
|
| 340 | #### ERE can't express higher Unicode escapes
|
| 341 | shopt -s ysh:all
|
| 342 | var pat2 = /[ \u{00} - \u{ff} ]/;
|
| 343 |
|
| 344 | # This causes an error
|
| 345 | echo $pat2
|
| 346 |
|
| 347 | # This just prints it
|
| 348 | = pat2
|
| 349 |
|
| 350 | var pat1 = /[ \u{ff} ]/;
|
| 351 |
|
| 352 | echo $pat1 | od -A n -t x1
|
| 353 | if ($'\x7f' ~ pat) { echo yes } else { echo no }
|
| 354 | if ($'\x7e' ~ pat) { echo yes } else { echo no }
|
| 355 |
|
| 356 | ## status: 1
|
| 357 | ## stdout-json: ""
|
| 358 |
|
| 359 | #### non-ASCII bytes must be singleton terms, e.g. '\x7f\xff' is disallowed
|
| 360 | var bytes = $'\x7f\xff'
|
| 361 | var pat = / [ @bytes ] /
|
| 362 | echo $pat
|
| 363 | ## status: 1
|
| 364 | ## stdout-json: ""
|
| 365 |
|
| 366 | #### Matching escaped tab character
|
| 367 | shopt -s ysh:all
|
| 368 |
|
| 369 | # BUG: need C strings in array literal
|
| 370 | var lines = :| $'aa\tbb' $'cc\tdd' |
|
| 371 |
|
| 372 | var pat = / ('a' [\t] 'b') /
|
| 373 | write pat=$pat
|
| 374 | write @lines | egrep $pat
|
| 375 |
|
| 376 | ## stdout-json: "pat=(a[\t]b)\naa\tbb\n"
|
| 377 |
|
| 378 | #### Repeated String Literal With Single Char
|
| 379 | shopt -s ysh:all
|
| 380 |
|
| 381 | var literal = 'f'
|
| 382 | var pat = null
|
| 383 |
|
| 384 | setvar pat = / %start @literal+ %end /
|
| 385 | echo $pat
|
| 386 | setvar pat = / %start (@literal)+ %end /
|
| 387 | echo $pat
|
| 388 |
|
| 389 | if ('fff' ~ pat) { echo yes }
|
| 390 | if ('foo' !~ pat) { echo no }
|
| 391 |
|
| 392 | ## STDOUT:
|
| 393 | ^f+$
|
| 394 | ^(f)+$
|
| 395 | yes
|
| 396 | no
|
| 397 | ## END
|
| 398 |
|
| 399 | #### Error when unparenthesized string of more than one character is repeated
|
| 400 | shopt -s ysh:all
|
| 401 |
|
| 402 | var literal = 'foo'
|
| 403 | var pat = null
|
| 404 |
|
| 405 | setvar pat = / %start @literal+ %end /
|
| 406 | echo $pat
|
| 407 | setvar pat = / %start (@literal)+ %end /
|
| 408 | echo $pat
|
| 409 |
|
| 410 | if ('foofoo' ~ pat) { echo yes }
|
| 411 | if ('foof' !~ pat) { echo no }
|
| 412 |
|
| 413 | ## status: 1
|
| 414 | ## stdout-json: ""
|
| 415 |
|
| 416 | #### Instead of $'foo\\bar' use 'foo' \\ 'bar'
|
| 417 | shopt -s ysh:all
|
| 418 | var pat = /'foo' \\ 'bar'/
|
| 419 | echo $pat
|
| 420 |
|
| 421 | if (r'foo\bar' ~ pat) { echo yes }
|
| 422 | if (r'foo.bar' !~ pat) { echo no }
|
| 423 | ## STDOUT:
|
| 424 | foo\\bar
|
| 425 | yes
|
| 426 | no
|
| 427 | ## END
|
| 428 |
|
| 429 | #### Negation of Character Class ![a-z]
|
| 430 | shopt -s ysh:all
|
| 431 |
|
| 432 | var pat = / ![ a-z ] /
|
| 433 | echo $pat
|
| 434 |
|
| 435 | if ('0' ~ pat) { echo yes }
|
| 436 | if ('a' !~ pat) { echo no }
|
| 437 |
|
| 438 | ## STDOUT:
|
| 439 | [^a-z]
|
| 440 | yes
|
| 441 | no
|
| 442 | ## END
|
| 443 |
|
| 444 | #### Posix and Perl class in class literals
|
| 445 | shopt -s ysh:all
|
| 446 |
|
| 447 | var pat = null
|
| 448 |
|
| 449 | setvar pat = / [ space 'z' ] /
|
| 450 | echo $pat
|
| 451 | #setvar pat = / [ ~space 'z' ] /
|
| 452 | #echo $pat
|
| 453 |
|
| 454 | # PROBLEM: can't negate individual POSIX classes. They would have to be a Perl
|
| 455 | # class to be \D or \S.
|
| 456 | # [[:space:]z] negates the whole thing!
|
| 457 | # [^[:space:]]
|
| 458 |
|
| 459 | setvar pat = / [ digit 'z' ] /
|
| 460 | echo $pat
|
| 461 | #setvar pat = / [ ~digit 'z' ] /
|
| 462 | #echo $pat
|
| 463 |
|
| 464 | ## STDOUT:
|
| 465 | [[:space:]z]
|
| 466 | [[:digit:]z]
|
| 467 | ## END
|
| 468 |
|
| 469 | #### [!d] can't be negated because it's a literal character
|
| 470 | setvar pat = / [ !d 'z' ] /
|
| 471 | echo $pat
|
| 472 | ## status: 2
|
| 473 | ## stdout-json: ""
|
| 474 |
|
| 475 | #### [!digit] can't be negated in POSIX ERE (but yes in Perl)
|
| 476 | var pat = null
|
| 477 | setvar pat = / [ !digit 'z' ] /
|
| 478 | echo $pat
|
| 479 | ## status: 1
|
| 480 | ## stdout-json: ""
|
| 481 |
|
| 482 | #### Operator chars in char classes (bash-like)
|
| 483 |
|
| 484 | pat='[-]'
|
| 485 | [[ '-' =~ $pat ]] && echo hyphen
|
| 486 | [[ '\' =~ $pat ]] && echo FAIL
|
| 487 |
|
| 488 | pat='[\]'
|
| 489 | [[ '\' =~ $pat ]] && echo backslash
|
| 490 | [[ '-' =~ $pat ]] && echo FAIL
|
| 491 |
|
| 492 | pat='[]]'
|
| 493 | [[ ']' =~ $pat ]] && echo 'right bracket'
|
| 494 | [[ '[' =~ $pat ]] && echo FAIL
|
| 495 |
|
| 496 | pat='[[]'
|
| 497 | [[ '[' =~ $pat ]] && echo 'left bracket'
|
| 498 | [[ ']' =~ $pat ]] && echo FAIL
|
| 499 |
|
| 500 | pat='[.]'
|
| 501 | [[ '.' =~ $pat ]] && echo period
|
| 502 | [[ '\' =~ $pat ]] && echo FAIL
|
| 503 |
|
| 504 | pat='[\^]'
|
| 505 | [[ '^' =~ $pat ]] && echo caret
|
| 506 | [[ '\' =~ $pat ]] && echo 'no way to have [^]'
|
| 507 |
|
| 508 | ## STDOUT:
|
| 509 | hyphen
|
| 510 | backslash
|
| 511 | right bracket
|
| 512 | left bracket
|
| 513 | period
|
| 514 | caret
|
| 515 | no way to have [^]
|
| 516 | ## END
|
| 517 |
|
| 518 | #### Operator chars in char classes (eggex)
|
| 519 | shopt --set ysh:upgrade
|
| 520 |
|
| 521 | var pat = / ['-'] /
|
| 522 | #echo PAT=$pat
|
| 523 | if ('-' ~ pat) { echo hyphen }
|
| 524 | if ($'\\' ~ pat) { echo FAIL }
|
| 525 |
|
| 526 | var pat = / [ \\ ] /
|
| 527 | [[ '\' =~ $pat ]] && echo backslash
|
| 528 | [[ '-' =~ $pat ]] && echo FAIL
|
| 529 |
|
| 530 | var pat = / [ ']' ] /
|
| 531 | [[ ']' =~ $pat ]] && echo 'right bracket'
|
| 532 | [[ '[' =~ $pat ]] && echo FAIL
|
| 533 |
|
| 534 | var pat = / [ '[' ] /
|
| 535 | [[ '[' =~ $pat ]] && echo 'left bracket'
|
| 536 | [[ ']' =~ $pat ]] && echo FAIL
|
| 537 |
|
| 538 | var pat = / [ '.' ] /
|
| 539 | [[ '.' =~ $pat ]] && echo period
|
| 540 | [[ '\' =~ $pat ]] && echo FAIL
|
| 541 |
|
| 542 | var pat = / [ \\ '^' ] /
|
| 543 | [[ '^' =~ $pat ]] && echo caret
|
| 544 | [[ '\' =~ $pat ]] && echo 'no way to have [^]'
|
| 545 |
|
| 546 |
|
| 547 | ## STDOUT:
|
| 548 | hyphen
|
| 549 | backslash
|
| 550 | right bracket
|
| 551 | left bracket
|
| 552 | period
|
| 553 | caret
|
| 554 | no way to have [^]
|
| 555 | ## END
|
| 556 |
|
| 557 | #### Matching ] and \ and ' and " in character classes
|
| 558 | shopt -s ysh:all
|
| 559 |
|
| 560 | # BUG: need C strings in array literal
|
| 561 | var lines = :|
|
| 562 | 'backslash \'
|
| 563 | 'rbracket ]'
|
| 564 | 'lbracket ['
|
| 565 | "sq '"
|
| 566 | 'dq ""'
|
| 567 | |
|
| 568 |
|
| 569 | # Weird GNU quirk: ] has to come first!
|
| 570 | # []abc] works. But [abc\]] does NOT work. Stupid rule!
|
| 571 |
|
| 572 | var pat = / [ ']' \\ \' \" ] /
|
| 573 | write pat=$pat
|
| 574 | write @lines | egrep $pat
|
| 575 |
|
| 576 | ## STDOUT:
|
| 577 | pat=[]'"\\]
|
| 578 | backslash \
|
| 579 | rbracket ]
|
| 580 | sq '
|
| 581 | dq ""
|
| 582 | ## END
|
| 583 |
|
| 584 | #### Matching literal hyphen in character classes
|
| 585 | shopt -s ysh:all
|
| 586 |
|
| 587 | var literal = '-'
|
| 588 | var pat = / [ 'a' 'b' @literal ] /
|
| 589 | write pat=$pat
|
| 590 | write 'c-d' 'ab' 'cd' | grep $pat
|
| 591 | ## STDOUT:
|
| 592 | pat=[ab-]
|
| 593 | c-d
|
| 594 | ab
|
| 595 | ## END
|
| 596 |
|
| 597 | #### Char class special: ^ - ] \
|
| 598 |
|
| 599 | # See demo/ere-char-class-literals.sh
|
| 600 | #
|
| 601 | # \ is special because of gawk
|
| 602 |
|
| 603 | shopt -s ysh:upgrade
|
| 604 |
|
| 605 |
|
| 606 | # Note: single caret disalowed
|
| 607 | var caret = / ['^' 'x'] /
|
| 608 | echo caret=$caret
|
| 609 |
|
| 610 | var caret2 = / [ \x5e 'x'] /
|
| 611 | echo caret2=$caret2
|
| 612 |
|
| 613 | var caret3 = / [ \u{5e} 'x'] /
|
| 614 | echo caret3=$caret3
|
| 615 |
|
| 616 | if ('x' ~ caret3) {
|
| 617 | echo 'match x'
|
| 618 | }
|
| 619 | if ('^' ~ caret3) {
|
| 620 | echo 'match ^'
|
| 621 | }
|
| 622 |
|
| 623 | echo ---
|
| 624 |
|
| 625 | var hyphen = / ['a' '-' 'b'] /
|
| 626 | echo hyphen=$hyphen
|
| 627 |
|
| 628 | var hyphen2 = / ['a' \x2d 'b' ] /
|
| 629 | echo hyphen2=$hyphen2
|
| 630 |
|
| 631 | if ('-' ~ hyphen2) {
|
| 632 | echo 'match -'
|
| 633 | }
|
| 634 |
|
| 635 | if ('a' ~ hyphen2) {
|
| 636 | echo 'match a'
|
| 637 | }
|
| 638 |
|
| 639 | if ('c' ~ hyphen2) {
|
| 640 | echo 'match c'
|
| 641 | }
|
| 642 |
|
| 643 | echo ---
|
| 644 |
|
| 645 | var rbracket = / [ '[' ']' ] /
|
| 646 | echo rbracket=$rbracket
|
| 647 |
|
| 648 | var rbracket2 = / [ \x5b \x5d ] /
|
| 649 | echo rbracket2=$rbracket2
|
| 650 |
|
| 651 | if ('[' ~ rbracket2) {
|
| 652 | echo 'match ['
|
| 653 | }
|
| 654 |
|
| 655 | if (']' ~ rbracket2) {
|
| 656 | echo 'match ]'
|
| 657 | }
|
| 658 |
|
| 659 | echo ---
|
| 660 |
|
| 661 | var backslash = / [ 'x' \\ 'n' ] /
|
| 662 | echo backslash=$backslash
|
| 663 |
|
| 664 | var backslash2 = / [ 'x' \x5c 'n' ] /
|
| 665 | echo backslash2=$backslash2
|
| 666 |
|
| 667 | var backslash3 = / [ 'x' $'\\' 'n' ] /
|
| 668 | echo backslash3=$backslash3
|
| 669 |
|
| 670 | if ('x' ~ backslash3) {
|
| 671 | echo 'match x'
|
| 672 | }
|
| 673 |
|
| 674 | if ('n' ~ backslash3) {
|
| 675 | echo 'match n'
|
| 676 | }
|
| 677 |
|
| 678 | if ($'\\' ~ backslash3) {
|
| 679 | echo 'match backslash'
|
| 680 | }
|
| 681 |
|
| 682 | if ($'\n' ~ backslash3) {
|
| 683 | echo 'match nnewline'
|
| 684 | }
|
| 685 |
|
| 686 |
|
| 687 | ## STDOUT:
|
| 688 | caret=[x^]
|
| 689 | caret2=[x^]
|
| 690 | caret3=[x^]
|
| 691 | match x
|
| 692 | match ^
|
| 693 | ---
|
| 694 | hyphen=[ab-]
|
| 695 | hyphen2=[ab-]
|
| 696 | match -
|
| 697 | match a
|
| 698 | ---
|
| 699 | rbracket=[][]
|
| 700 | rbracket2=[][]
|
| 701 | match [
|
| 702 | match ]
|
| 703 | ---
|
| 704 | backslash=[xn\\]
|
| 705 | backslash2=[xn\\]
|
| 706 | backslash3=[xn\\]
|
| 707 | match x
|
| 708 | match n
|
| 709 | match backslash
|
| 710 | ## END
|
| 711 |
|