/documentation/docs/helpers.html
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1<!DOCTYPE html> 2 3<html> 4<head> 5 <title>helpers.coffee</title> 6 <meta http-equiv="content-type" content="text/html; charset=UTF-8"> 7 <meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;"> 8 <link rel="stylesheet" media="all" href="docco.css" /> 9</head> 10<body> 11 <div id="container"> 12 <div id="background"></div> 13 14 <ul id="jump_to"> 15 <li> 16 <a class="large" href="javascript:void(0);">Jump To …</a> 17 <a class="small" href="javascript:void(0);">+</a> 18 <div id="jump_wrapper"> 19 <div id="jump_page_wrapper"> 20 <div id="jump_page"> 21 22 23 <a class="source" href="browser.html"> 24 browser.coffee 25 </a> 26 27 28 <a class="source" href="cake.html"> 29 cake.coffee 30 </a> 31 32 33 <a class="source" href="coffee-script.html"> 34 coffee-script.coffee 35 </a> 36 37 38 <a class="source" href="command.html"> 39 command.coffee 40 </a> 41 42 43 <a class="source" href="grammar.html"> 44 grammar.coffee 45 </a> 46 47 48 <a class="source" href="helpers.html"> 49 helpers.coffee 50 </a> 51 52 53 <a class="source" href="index.html"> 54 index.coffee 55 </a> 56 57 58 <a class="source" href="lexer.html"> 59 lexer.coffee 60 </a> 61 62 63 <a class="source" href="nodes.html"> 64 nodes.coffee 65 </a> 66 67 68 <a class="source" href="optparse.html"> 69 optparse.coffee 70 </a> 71 72 73 <a class="source" href="register.html"> 74 register.coffee 75 </a> 76 77 78 <a class="source" href="repl.html"> 79 repl.coffee 80 </a> 81 82 83 <a class="source" href="rewriter.html"> 84 rewriter.coffee 85 </a> 86 87 88 <a class="source" href="scope.html"> 89 scope.litcoffee 90 </a> 91 92 93 <a class="source" href="sourcemap.html"> 94 sourcemap.litcoffee 95 </a> 96 97 </div> 98 </div> 99 </li> 100 </ul> 101 102 <ul class="sections"> 103 104 <li id="title"> 105 <div class="annotation"> 106 <h1>helpers.coffee</h1> 107 </div> 108 </li> 109 110 111 112 <li id="section-1"> 113 <div class="annotation"> 114 115 <div class="pilwrap "> 116 <a class="pilcrow" href="#section-1">¶</a> 117 </div> 118 <p>This file contains the common helper functions that we’d like to share among 119the <strong>Lexer</strong>, <strong>Rewriter</strong>, and the <strong>Nodes</strong>. Merge objects, flatten 120arrays, count characters, that sort of thing.</p> 121 122 </div> 123 124 </li> 125 126 127 <li id="section-2"> 128 <div class="annotation"> 129 130 <div class="pilwrap "> 131 <a class="pilcrow" href="#section-2">¶</a> 132 </div> 133 <p>Peek at the beginning of a given string to see if it matches a sequence.</p> 134 135 </div> 136 137 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">starts</span> = <span class="hljs-params">(string, literal, start)</span> -></span> 138 literal <span class="hljs-keyword">is</span> string.substr start, literal.length</pre></div></div> 139 140 </li> 141 142 143 <li id="section-3"> 144 <div class="annotation"> 145 146 <div class="pilwrap "> 147 <a class="pilcrow" href="#section-3">¶</a> 148 </div> 149 <p>Peek at the end of a given string to see if it matches a sequence.</p> 150 151 </div> 152 153 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">ends</span> = <span class="hljs-params">(string, literal, back)</span> -></span> 154 len = literal.length 155 literal <span class="hljs-keyword">is</span> string.substr string.length - len - (back <span class="hljs-keyword">or</span> <span class="hljs-number">0</span>), len</pre></div></div> 156 157 </li> 158 159 160 <li id="section-4"> 161 <div class="annotation"> 162 163 <div class="pilwrap "> 164 <a class="pilcrow" href="#section-4">¶</a> 165 </div> 166 <p>Repeat a string <code>n</code> times.</p> 167 168 </div> 169 170 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.repeat = <span class="hljs-function"><span class="hljs-title">repeat</span> = <span class="hljs-params">(str, n)</span> -></span></pre></div></div> 171 172 </li> 173 174 175 <li id="section-5"> 176 <div class="annotation"> 177 178 <div class="pilwrap "> 179 <a class="pilcrow" href="#section-5">¶</a> 180 </div> 181 <p>Use clever algorithm to have O(log(n)) string concatenation operations.</p> 182 183 </div> 184 185 <div class="content"><div class='highlight'><pre> res = <span class="hljs-string">''</span> 186 <span class="hljs-keyword">while</span> n > <span class="hljs-number">0</span> 187 res += str <span class="hljs-keyword">if</span> n & <span class="hljs-number">1</span> 188 n >>>= <span class="hljs-number">1</span> 189 str += str 190 res</pre></div></div> 191 192 </li> 193 194 195 <li id="section-6"> 196 <div class="annotation"> 197 198 <div class="pilwrap "> 199 <a class="pilcrow" href="#section-6">¶</a> 200 </div> 201 <p>Trim out all falsy values from an array.</p> 202 203 </div> 204 205 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">compact</span> = <span class="hljs-params">(array)</span> -></span> 206 item <span class="hljs-keyword">for</span> item <span class="hljs-keyword">in</span> array <span class="hljs-keyword">when</span> item</pre></div></div> 207 208 </li> 209 210 211 <li id="section-7"> 212 <div class="annotation"> 213 214 <div class="pilwrap "> 215 <a class="pilcrow" href="#section-7">¶</a> 216 </div> 217 <p>Count the number of occurrences of a string in a string.</p> 218 219 </div> 220 221 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">count</span> = <span class="hljs-params">(string, substr)</span> -></span> 222 num = pos = <span class="hljs-number">0</span> 223 <span class="hljs-keyword">return</span> <span class="hljs-number">1</span>/<span class="hljs-number">0</span> <span class="hljs-keyword">unless</span> substr.length 224 num++ <span class="hljs-keyword">while</span> pos = <span class="hljs-number">1</span> + string.indexOf substr, pos 225 num</pre></div></div> 226 227 </li> 228 229 230 <li id="section-8"> 231 <div class="annotation"> 232 233 <div class="pilwrap "> 234 <a class="pilcrow" href="#section-8">¶</a> 235 </div> 236 <p>Merge objects, returning a fresh copy with attributes from both sides. 237Used every time <code>Base#compile</code> is called, to allow properties in the 238options hash to propagate down the tree without polluting other branches.</p> 239 240 </div> 241 242 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">merge</span> = <span class="hljs-params">(options, overrides)</span> -></span> 243 extend (extend {}, options), overrides</pre></div></div> 244 245 </li> 246 247 248 <li id="section-9"> 249 <div class="annotation"> 250 251 <div class="pilwrap "> 252 <a class="pilcrow" href="#section-9">¶</a> 253 </div> 254 <p>Extend a source object with the properties of another object (shallow copy).</p> 255 256 </div> 257 258 <div class="content"><div class='highlight'><pre>extend = <span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">extend</span> = <span class="hljs-params">(object, properties)</span> -></span> 259 <span class="hljs-keyword">for</span> key, val <span class="hljs-keyword">of</span> properties 260 object[key] = val 261 object</pre></div></div> 262 263 </li> 264 265 266 <li id="section-10"> 267 <div class="annotation"> 268 269 <div class="pilwrap "> 270 <a class="pilcrow" href="#section-10">¶</a> 271 </div> 272 <p>Return a flattened version of an array. 273Handy for getting a list of <code>children</code> from the nodes.</p> 274 275 </div> 276 277 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.flatten = <span class="hljs-function"><span class="hljs-title">flatten</span> = <span class="hljs-params">(array)</span> -></span> 278 flattened = [] 279 <span class="hljs-keyword">for</span> element <span class="hljs-keyword">in</span> array 280 <span class="hljs-keyword">if</span> <span class="hljs-string">'[object Array]'</span> <span class="hljs-keyword">is</span> <span class="hljs-attribute">Object</span>::toString.call element 281 flattened = flattened.concat flatten element 282 <span class="hljs-keyword">else</span> 283 flattened.push element 284 flattened</pre></div></div> 285 286 </li> 287 288 289 <li id="section-11"> 290 <div class="annotation"> 291 292 <div class="pilwrap "> 293 <a class="pilcrow" href="#section-11">¶</a> 294 </div> 295 <p>Delete a key from an object, returning the value. Useful when a node is 296looking for a particular method in an options hash.</p> 297 298 </div> 299 300 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">del</span> = <span class="hljs-params">(obj, key)</span> -></span> 301 val = obj[key] 302 <span class="hljs-keyword">delete</span> obj[key] 303 val</pre></div></div> 304 305 </li> 306 307 308 <li id="section-12"> 309 <div class="annotation"> 310 311 <div class="pilwrap "> 312 <a class="pilcrow" href="#section-12">¶</a> 313 </div> 314 <p>Typical Array::some</p> 315 316 </div> 317 318 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.some = <span class="hljs-attribute">Array</span>::some ? <span class="hljs-function"><span class="hljs-params">(fn)</span> -></span> 319 <span class="hljs-keyword">return</span> <span class="hljs-literal">true</span> <span class="hljs-keyword">for</span> e <span class="hljs-keyword">in</span> <span class="hljs-keyword">this</span> <span class="hljs-keyword">when</span> fn e 320 <span class="hljs-literal">false</span></pre></div></div> 321 322 </li> 323 324 325 <li id="section-13"> 326 <div class="annotation"> 327 328 <div class="pilwrap "> 329 <a class="pilcrow" href="#section-13">¶</a> 330 </div> 331 <p>Simple function for inverting Literate CoffeeScript code by putting the 332documentation in comments, producing a string of CoffeeScript code that 333can be compiled “normally”.</p> 334 335 </div> 336 337 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">invertLiterate</span> = <span class="hljs-params">(code)</span> -></span> 338 maybe_code = <span class="hljs-literal">true</span> 339 lines = <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> code.split(<span class="hljs-string">'\n'</span>) 340 <span class="hljs-keyword">if</span> maybe_code <span class="hljs-keyword">and</span> <span class="hljs-regexp">/^([ ]{4}|[ ]{0,3}\t)/</span>.test line 341 line 342 <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> maybe_code = <span class="hljs-regexp">/^\s*$/</span>.test line 343 line 344 <span class="hljs-keyword">else</span> 345 <span class="hljs-string">'# '</span> + line 346 lines.join <span class="hljs-string">'\n'</span></pre></div></div> 347 348 </li> 349 350 351 <li id="section-14"> 352 <div class="annotation"> 353 354 <div class="pilwrap "> 355 <a class="pilcrow" href="#section-14">¶</a> 356 </div> 357 <p>Merge two jison-style location data objects together. 358If <code>last</code> is not provided, this will simply return <code>first</code>.</p> 359 360 </div> 361 362 <div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">buildLocationData</span> = <span class="hljs-params">(first, last)</span> -></span> 363 <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> last 364 first 365 <span class="hljs-keyword">else</span> 366 <span class="hljs-attribute">first_line</span>: first.first_line 367 <span class="hljs-attribute">first_column</span>: first.first_column 368 <span class="hljs-attribute">last_line</span>: last.last_line 369 <span class="hljs-attribute">last_column</span>: last.last_column</pre></div></div> 370 371 </li> 372 373 374 <li id="section-15"> 375 <div class="annotation"> 376 377 <div class="pilwrap "> 378 <a class="pilcrow" href="#section-15">¶</a> 379 </div> 380 <p>This returns a function which takes an object as a parameter, and if that 381object is an AST node, updates that object’s locationData. 382The object is returned either way.</p> 383 384 </div> 385 386 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">addLocationDataFn</span> = <span class="hljs-params">(first, last)</span> -></span> 387 <span class="hljs-function"><span class="hljs-params">(obj)</span> -></span> 388 <span class="hljs-keyword">if</span> ((<span class="hljs-keyword">typeof</span> obj) <span class="hljs-keyword">is</span> <span class="hljs-string">'object'</span>) <span class="hljs-keyword">and</span> (!!obj[<span class="hljs-string">'updateLocationDataIfMissing'</span>]) 389 obj.updateLocationDataIfMissing buildLocationData(first, last) 390 391 <span class="hljs-keyword">return</span> obj</pre></div></div> 392 393 </li> 394 395 396 <li id="section-16"> 397 <div class="annotation"> 398 399 <div class="pilwrap "> 400 <a class="pilcrow" href="#section-16">¶</a> 401 </div> 402 <p>Convert jison location data to a string. 403<code>obj</code> can be a token, or a locationData.</p> 404 405 </div> 406 407 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">locationDataToString</span> = <span class="hljs-params">(obj)</span> -></span> 408 <span class="hljs-keyword">if</span> (<span class="hljs-string">"2"</span> <span class="hljs-keyword">of</span> obj) <span class="hljs-keyword">and</span> (<span class="hljs-string">"first_line"</span> <span class="hljs-keyword">of</span> obj[<span class="hljs-number">2</span>]) <span class="hljs-keyword">then</span> locationData = obj[<span class="hljs-number">2</span>] 409 <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> <span class="hljs-string">"first_line"</span> <span class="hljs-keyword">of</span> obj <span class="hljs-keyword">then</span> locationData = obj 410 411 <span class="hljs-keyword">if</span> locationData 412 <span class="hljs-string">"<span class="hljs-subst">#{locationData.first_line + <span class="hljs-number">1</span>}</span>:<span class="hljs-subst">#{locationData.first_column + <span class="hljs-number">1</span>}</span>-"</span> + 413 <span class="hljs-string">"<span class="hljs-subst">#{locationData.last_line + <span class="hljs-number">1</span>}</span>:<span class="hljs-subst">#{locationData.last_column + <span class="hljs-number">1</span>}</span>"</span> 414 <span class="hljs-keyword">else</span> 415 <span class="hljs-string">"No location data"</span></pre></div></div> 416 417 </li> 418 419 420 <li id="section-17"> 421 <div class="annotation"> 422 423 <div class="pilwrap "> 424 <a class="pilcrow" href="#section-17">¶</a> 425 </div> 426 <p>A <code>.coffee.md</code> compatible version of <code>basename</code>, that returns the file sans-extension.</p> 427 428 </div> 429 430 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">baseFileName</span> = <span class="hljs-params">(file, stripExt = <span class="hljs-literal">no</span>, useWinPathSep = <span class="hljs-literal">no</span>)</span> -></span> 431 pathSep = <span class="hljs-keyword">if</span> useWinPathSep <span class="hljs-keyword">then</span> <span class="hljs-regexp">/\\|\//</span> <span class="hljs-keyword">else</span> <span class="hljs-regexp">/\/</span>/ 432 parts = file.split(pathSep) 433 file = parts[parts.length - <span class="hljs-number">1</span>] 434 <span class="hljs-keyword">return</span> file <span class="hljs-keyword">unless</span> stripExt <span class="hljs-keyword">and</span> file.indexOf(<span class="hljs-string">'.'</span>) >= <span class="hljs-number">0</span> 435 parts = file.split(<span class="hljs-string">'.'</span>) 436 parts.pop() 437 parts.pop() <span class="hljs-keyword">if</span> parts[parts.length - <span class="hljs-number">1</span>] <span class="hljs-keyword">is</span> <span class="hljs-string">'coffee'</span> <span class="hljs-keyword">and</span> parts.length > <span class="hljs-number">1</span> 438 parts.join(<span class="hljs-string">'.'</span>)</pre></div></div> 439 440 </li> 441 442 443 <li id="section-18"> 444 <div class="annotation"> 445 446 <div class="pilwrap "> 447 <a class="pilcrow" href="#section-18">¶</a> 448 </div> 449 <p>Determine if a filename represents a CoffeeScript file.</p> 450 451 </div> 452 453 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">isCoffee</span> = <span class="hljs-params">(file)</span> -></span> <span class="hljs-regexp">/\.((lit)?coffee|coffee\.md)$/</span>.test file</pre></div></div> 454 455 </li> 456 457 458 <li id="section-19"> 459 <div class="annotation"> 460 461 <div class="pilwrap "> 462 <a class="pilcrow" href="#section-19">¶</a> 463 </div> 464 <p>Determine if a filename represents a Literate CoffeeScript file.</p> 465 466 </div> 467 468 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">isLiterate</span> = <span class="hljs-params">(file)</span> -></span> <span class="hljs-regexp">/\.(litcoffee|coffee\.md)$/</span>.test file</pre></div></div> 469 470 </li> 471 472 473 <li id="section-20"> 474 <div class="annotation"> 475 476 <div class="pilwrap "> 477 <a class="pilcrow" href="#section-20">¶</a> 478 </div> 479 <p>Throws a SyntaxError from a given location. 480The error’s <code>toString</code> will return an error message following the “standard” 481format <filename>:<line>:<col>: <message> plus the line with the error and a 482marker showing where the error is.</p> 483 484 </div> 485 486 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">throwSyntaxError</span> = <span class="hljs-params">(message, location)</span> -></span> 487 error = <span class="hljs-keyword">new</span> SyntaxError message 488 error.location = location 489 error.toString = syntaxErrorToString</pre></div></div> 490 491 </li> 492 493 494 <li id="section-21"> 495 <div class="annotation"> 496 497 <div class="pilwrap "> 498 <a class="pilcrow" href="#section-21">¶</a> 499 </div> 500 <p>Instead of showing the compiler’s stacktrace, show our custom error message 501(this is useful when the error bubbles up in Node.js applications that 502compile CoffeeScript for example).</p> 503 504 </div> 505 506 <div class="content"><div class='highlight'><pre> error.stack = error.toString() 507 508 <span class="hljs-keyword">throw</span> error</pre></div></div> 509 510 </li> 511 512 513 <li id="section-22"> 514 <div class="annotation"> 515 516 <div class="pilwrap "> 517 <a class="pilcrow" href="#section-22">¶</a> 518 </div> 519 <p>Update a compiler SyntaxError with source code information if it didn’t have 520it already.</p> 521 522 </div> 523 524 <div class="content"><div class='highlight'><pre><span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">updateSyntaxError</span> = <span class="hljs-params">(error, code, filename)</span> -></span></pre></div></div> 525 526 </li> 527 528 529 <li id="section-23"> 530 <div class="annotation"> 531 532 <div class="pilwrap "> 533 <a class="pilcrow" href="#section-23">¶</a> 534 </div> 535 <p>Avoid screwing up the <code>stack</code> property of other errors (i.e. possible bugs).</p> 536 537 </div> 538 539 <div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> error.toString <span class="hljs-keyword">is</span> syntaxErrorToString 540 error.code <span class="hljs-keyword">or</span>= code 541 error.filename <span class="hljs-keyword">or</span>= filename 542 error.stack = error.toString() 543 error 544 545<span class="hljs-function"><span class="hljs-title">syntaxErrorToString</span> = -></span> 546 <span class="hljs-keyword">return</span> <span class="hljs-attribute">Error</span>::toString.call @ <span class="hljs-keyword">unless</span> <span class="hljs-property">@code</span> <span class="hljs-keyword">and</span> <span class="hljs-property">@location</span> 547 548 {first_line, first_column, last_line, last_column} = <span class="hljs-property">@location</span> 549 last_line ?= first_line 550 last_column ?= first_column 551 552 filename = <span class="hljs-property">@filename</span> <span class="hljs-keyword">or</span> <span class="hljs-string">'[stdin]'</span> 553 codeLine = <span class="hljs-property">@code</span>.split(<span class="hljs-string">'\n'</span>)[first_line] 554 start = first_column</pre></div></div> 555 556 </li> 557 558 559 <li id="section-24"> 560 <div class="annotation"> 561 562 <div class="pilwrap "> 563 <a class="pilcrow" href="#section-24">¶</a> 564 </div> 565 <p>Show only the first line on multi-line errors.</p> 566 567 </div> 568 569 <div class="content"><div class='highlight'><pre> end = <span class="hljs-keyword">if</span> first_line <span class="hljs-keyword">is</span> last_line <span class="hljs-keyword">then</span> last_column + <span class="hljs-number">1</span> <span class="hljs-keyword">else</span> codeLine.length 570 marker = codeLine[...start].replace(<span class="hljs-regexp">/[^\s]/g</span>, <span class="hljs-string">' '</span>) + repeat(<span class="hljs-string">'^'</span>, end - start)</pre></div></div> 571 572 </li> 573 574 575 <li id="section-25"> 576 <div class="annotation"> 577 578 <div class="pilwrap "> 579 <a class="pilcrow" href="#section-25">¶</a> 580 </div> 581 <p>Check to see if we’re running on a color-enabled TTY.</p> 582 583 </div> 584 585 <div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> process? 586 colorsEnabled = process.stdout?.isTTY <span class="hljs-keyword">and</span> <span class="hljs-keyword">not</span> process.env?.NODE_DISABLE_COLORS 587 588 <span class="hljs-keyword">if</span> <span class="hljs-property">@colorful</span> ? colorsEnabled 589 <span class="hljs-function"><span class="hljs-title">colorize</span> = <span class="hljs-params">(str)</span> -></span> <span class="hljs-string">"\x1B[1;31m<span class="hljs-subst">#{str}</span>\x1B[0m"</span> 590 codeLine = codeLine[...start] + colorize(codeLine[start...end]) + codeLine[end..] 591 marker = colorize marker 592 593 <span class="hljs-string">""" 594 <span class="hljs-subst">#{filename}</span>:<span class="hljs-subst">#{first_line + <span class="hljs-number">1</span>}</span>:<span class="hljs-subst">#{first_column + <span class="hljs-number">1</span>}</span>: error: <span class="hljs-subst">#{<span class="hljs-property">@message</span>}</span> 595 <span class="hljs-subst">#{codeLine}</span> 596 <span class="hljs-subst">#{marker}</span> 597 """</span> 598 599<span class="hljs-built_in">exports</span>.<span class="hljs-function"><span class="hljs-title">nameWhitespaceCharacter</span> = <span class="hljs-params">(string)</span> -></span> 600 <span class="hljs-keyword">switch</span> string 601 <span class="hljs-keyword">when</span> <span class="hljs-string">' '</span> <span class="hljs-keyword">then</span> <span class="hljs-string">'space'</span> 602 <span class="hljs-keyword">when</span> <span class="hljs-string">'\n'</span> <span class="hljs-keyword">then</span> <span class="hljs-string">'newline'</span> 603 <span class="hljs-keyword">when</span> <span class="hljs-string">'\r'</span> <span class="hljs-keyword">then</span> <span class="hljs-string">'carriage return'</span> 604 <span class="hljs-keyword">when</span> <span class="hljs-string">'\t'</span> <span class="hljs-keyword">then</span> <span class="hljs-string">'tab'</span> 605 <span class="hljs-keyword">else</span> string</pre></div></div> 606 607 </li> 608 609 </ul> 610 </div> 611</body> 612</html>