Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // Flags: --expose-debug-as debug --allow-natives-syntax |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 29 | // The functions used for testing backtraces. They are at the top to make the |
| 30 | // testing of source line/column easier. |
| 31 | |
| 32 | "use strict"; |
| 33 | |
| 34 | // Get the Debug object exposed from the debug context global object. |
| 35 | var Debug = debug.Debug; |
| 36 | |
| 37 | var test_name; |
| 38 | var listener_delegate; |
| 39 | var listener_called; |
| 40 | var exception; |
| 41 | var begin_test_count = 0; |
| 42 | var end_test_count = 0; |
| 43 | var break_count = 0; |
| 44 | |
| 45 | |
| 46 | // Debug event listener which delegates. |
| 47 | function listener(event, exec_state, event_data, data) { |
| 48 | try { |
| 49 | if (event == Debug.DebugEvent.Break) { |
| 50 | break_count++; |
| 51 | listener_called = true; |
| 52 | listener_delegate(exec_state); |
| 53 | } |
| 54 | } catch (e) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 55 | print(e, e.stack); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 56 | exception = e; |
| 57 | } |
| 58 | } |
| 59 | |
| 60 | // Add the debug event listener. |
| 61 | Debug.setListener(listener); |
| 62 | |
| 63 | |
| 64 | // Initialize for a new test. |
| 65 | function BeginTest(name) { |
| 66 | test_name = name; |
| 67 | listener_delegate = null; |
| 68 | listener_called = false; |
| 69 | exception = null; |
| 70 | begin_test_count++; |
| 71 | } |
| 72 | |
| 73 | |
| 74 | // Check result of a test. |
| 75 | function EndTest() { |
| 76 | assertTrue(listener_called, "listerner not called for " + test_name); |
| 77 | assertNull(exception, test_name, exception); |
| 78 | end_test_count++; |
| 79 | } |
| 80 | |
| 81 | var global_object = this; |
| 82 | |
| 83 | // Check that the scope chain contains the expected types of scopes. |
| 84 | function CheckScopeChain(scopes, exec_state) { |
| 85 | assertEquals(scopes.length, exec_state.frame().scopeCount()); |
| 86 | for (var i = 0; i < scopes.length; i++) { |
| 87 | var scope = exec_state.frame().scope(i); |
| 88 | assertTrue(scope.isScope()); |
| 89 | assertEquals(scopes[i], scope.scopeType()); |
| 90 | |
| 91 | // Check the global object when hitting the global scope. |
| 92 | if (scopes[i] == debug.ScopeType.Global) { |
| 93 | // Objects don't have same class (one is "global", other is "Object", |
| 94 | // so just check the properties directly. |
| 95 | assertPropertiesEqual(global_object, scope.scopeObject().value()); |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | // Get the debug command processor. |
| 100 | var dcp = exec_state.debugCommandProcessor("unspecified_running_state"); |
| 101 | |
| 102 | // Send a scopes request and check the result. |
| 103 | var json; |
| 104 | var request_json = '{"seq":0,"type":"request","command":"scopes"}'; |
| 105 | var response_json = dcp.processDebugJSONRequest(request_json); |
| 106 | var response = JSON.parse(response_json); |
| 107 | assertEquals(scopes.length, response.body.scopes.length); |
| 108 | for (var i = 0; i < scopes.length; i++) { |
| 109 | assertEquals(i, response.body.scopes[i].index); |
| 110 | assertEquals(scopes[i], response.body.scopes[i].type); |
| 111 | if (scopes[i] == debug.ScopeType.Local || |
| 112 | scopes[i] == debug.ScopeType.Script || |
| 113 | scopes[i] == debug.ScopeType.Closure) { |
| 114 | assertTrue(response.body.scopes[i].object.ref < 0); |
| 115 | } else { |
| 116 | assertTrue(response.body.scopes[i].object.ref >= 0); |
| 117 | } |
| 118 | var found = false; |
| 119 | for (var j = 0; j < response.refs.length && !found; j++) { |
| 120 | found = response.refs[j].handle == response.body.scopes[i].object.ref; |
| 121 | } |
| 122 | assertTrue(found, "Scope object " + response.body.scopes[i].object.ref + " not found"); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | // Check that the content of the scope is as expected. For functions just check |
| 127 | // that there is a function. |
| 128 | function CheckScopeContent(content, number, exec_state) { |
| 129 | var scope = exec_state.frame().scope(number); |
| 130 | var count = 0; |
| 131 | for (var p in content) { |
| 132 | var property_mirror = scope.scopeObject().property(p); |
| 133 | if (property_mirror.isUndefined()) { |
| 134 | print('property ' + p + ' not found in scope'); |
| 135 | } |
| 136 | assertFalse(property_mirror.isUndefined(), 'property ' + p + ' not found in scope'); |
| 137 | if (typeof(content[p]) === 'function') { |
| 138 | assertTrue(property_mirror.value().isFunction()); |
| 139 | } else { |
| 140 | assertEquals(content[p], property_mirror.value().value(), 'property ' + p + ' has unexpected value'); |
| 141 | } |
| 142 | count++; |
| 143 | } |
| 144 | |
| 145 | // 'arguments' and might be exposed in the local and closure scope. Just |
| 146 | // ignore this. |
| 147 | var scope_size = scope.scopeObject().properties().length; |
| 148 | if (!scope.scopeObject().property('arguments').isUndefined()) { |
| 149 | scope_size--; |
| 150 | } |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 151 | // Temporary variables introduced by the parser have not been materialized. |
| 152 | assertTrue(scope.scopeObject().property('').isUndefined()); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 153 | |
| 154 | if (count != scope_size) { |
| 155 | print('Names found in scope:'); |
| 156 | var names = scope.scopeObject().propertyNames(); |
| 157 | for (var i = 0; i < names.length; i++) { |
| 158 | print(names[i]); |
| 159 | } |
| 160 | } |
| 161 | assertEquals(count, scope_size); |
| 162 | |
| 163 | // Get the debug command processor. |
| 164 | var dcp = exec_state.debugCommandProcessor("unspecified_running_state"); |
| 165 | |
| 166 | // Send a scope request for information on a single scope and check the |
| 167 | // result. |
| 168 | var request_json = '{"seq":0,"type":"request","command":"scope","arguments":{"number":'; |
| 169 | request_json += scope.scopeIndex(); |
| 170 | request_json += '}}'; |
| 171 | var response_json = dcp.processDebugJSONRequest(request_json); |
| 172 | var response = JSON.parse(response_json); |
| 173 | assertEquals(scope.scopeType(), response.body.type); |
| 174 | assertEquals(number, response.body.index); |
| 175 | if (scope.scopeType() == debug.ScopeType.Local || |
| 176 | scope.scopeType() == debug.ScopeType.Closure) { |
| 177 | assertTrue(response.body.object.ref < 0); |
| 178 | } else { |
| 179 | assertTrue(response.body.object.ref >= 0); |
| 180 | } |
| 181 | var found = false; |
| 182 | for (var i = 0; i < response.refs.length && !found; i++) { |
| 183 | found = response.refs[i].handle == response.body.object.ref; |
| 184 | } |
| 185 | assertTrue(found, "Scope object " + response.body.object.ref + " not found"); |
| 186 | } |
| 187 | |
| 188 | |
| 189 | function assertEqualsUnlessOptimized(expected, value, f) { |
| 190 | try { |
| 191 | assertEquals(expected, value); |
| 192 | } catch (e) { |
| 193 | assertOptimized(f); |
| 194 | } |
| 195 | } |
| 196 | |
| 197 | // Simple empty block scope in local scope. |
| 198 | BeginTest("Local block 1"); |
| 199 | |
| 200 | function local_block_1() { |
| 201 | { |
| 202 | debugger; |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | listener_delegate = function(exec_state) { |
| 207 | CheckScopeChain([debug.ScopeType.Local, |
| 208 | debug.ScopeType.Script, |
| 209 | debug.ScopeType.Global], exec_state); |
| 210 | CheckScopeContent({}, 0, exec_state); |
| 211 | }; |
| 212 | local_block_1(); |
| 213 | EndTest(); |
| 214 | |
| 215 | |
| 216 | // Simple empty block scope in local scope with a parameter. |
| 217 | BeginTest("Local 2"); |
| 218 | |
| 219 | function local_2(a) { |
| 220 | { |
| 221 | debugger; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | listener_delegate = function(exec_state) { |
| 226 | CheckScopeChain([debug.ScopeType.Local, |
| 227 | debug.ScopeType.Script, |
| 228 | debug.ScopeType.Global], exec_state); |
| 229 | CheckScopeContent({a:1}, 0, exec_state); |
| 230 | }; |
| 231 | local_2(1); |
| 232 | EndTest(); |
| 233 | |
| 234 | |
| 235 | // Local scope with a parameter and a local variable. |
| 236 | BeginTest("Local 3"); |
| 237 | |
| 238 | function local_3(a) { |
| 239 | let x = 3; |
| 240 | debugger; |
| 241 | } |
| 242 | |
| 243 | listener_delegate = function(exec_state) { |
| 244 | CheckScopeChain([debug.ScopeType.Local, |
| 245 | debug.ScopeType.Script, |
| 246 | debug.ScopeType.Global], exec_state); |
| 247 | CheckScopeContent({a:1,x:3}, 0, exec_state); |
| 248 | }; |
| 249 | local_3(1); |
| 250 | EndTest(); |
| 251 | |
| 252 | |
| 253 | // Local scope with parameters and local variables. |
| 254 | BeginTest("Local 4"); |
| 255 | |
| 256 | function local_4(a, b) { |
| 257 | let x = 3; |
| 258 | let y = 4; |
| 259 | debugger; |
| 260 | } |
| 261 | |
| 262 | listener_delegate = function(exec_state) { |
| 263 | CheckScopeChain([debug.ScopeType.Local, |
| 264 | debug.ScopeType.Script, |
| 265 | debug.ScopeType.Global], exec_state); |
| 266 | CheckScopeContent({a:1,b:2,x:3,y:4}, 0, exec_state); |
| 267 | }; |
| 268 | local_4(1, 2); |
| 269 | EndTest(); |
| 270 | |
| 271 | |
| 272 | // Single variable in a block scope. |
| 273 | BeginTest("Local 5"); |
| 274 | |
| 275 | function local_5(a) { |
| 276 | { |
| 277 | let x = 5; |
| 278 | debugger; |
| 279 | } |
| 280 | } |
| 281 | |
| 282 | listener_delegate = function(exec_state) { |
| 283 | CheckScopeChain([debug.ScopeType.Block, |
| 284 | debug.ScopeType.Local, |
| 285 | debug.ScopeType.Script, |
| 286 | debug.ScopeType.Global], exec_state); |
| 287 | CheckScopeContent({x:5}, 0, exec_state); |
| 288 | CheckScopeContent({a:1}, 1, exec_state); |
| 289 | }; |
| 290 | local_5(1); |
| 291 | EndTest(); |
| 292 | |
| 293 | |
| 294 | // Two variables in a block scope. |
| 295 | BeginTest("Local 6"); |
| 296 | |
| 297 | function local_6(a) { |
| 298 | { |
| 299 | let x = 6; |
| 300 | let y = 7; |
| 301 | debugger; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | listener_delegate = function(exec_state) { |
| 306 | CheckScopeChain([debug.ScopeType.Block, |
| 307 | debug.ScopeType.Local, |
| 308 | debug.ScopeType.Script, |
| 309 | debug.ScopeType.Global], exec_state); |
| 310 | CheckScopeContent({x:6,y:7}, 0, exec_state); |
| 311 | CheckScopeContent({a:1}, 1, exec_state); |
| 312 | }; |
| 313 | local_6(1); |
| 314 | EndTest(); |
| 315 | |
| 316 | |
| 317 | // Two variables in a block scope. |
| 318 | BeginTest("Local 7"); |
| 319 | |
| 320 | function local_7(a) { |
| 321 | { |
| 322 | { |
| 323 | let x = 8; |
| 324 | debugger; |
| 325 | } |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | listener_delegate = function(exec_state) { |
| 330 | CheckScopeChain([debug.ScopeType.Block, |
| 331 | debug.ScopeType.Local, |
| 332 | debug.ScopeType.Script, |
| 333 | debug.ScopeType.Global], exec_state); |
| 334 | CheckScopeContent({x:8}, 0, exec_state); |
| 335 | CheckScopeContent({a:1}, 1, exec_state); |
| 336 | }; |
| 337 | local_7(1); |
| 338 | EndTest(); |
| 339 | |
| 340 | |
| 341 | // Simple closure formed by returning an inner function referering to an outer |
| 342 | // block local variable and an outer function's parameter. |
| 343 | BeginTest("Closure 1"); |
| 344 | |
| 345 | function closure_1(a) { |
| 346 | var x = 2; |
| 347 | let y = 3; |
| 348 | if (true) { |
| 349 | let z = 4; |
| 350 | function f() { |
| 351 | debugger; |
| 352 | return a + x + y + z; |
| 353 | }; |
| 354 | return f; |
| 355 | } |
| 356 | } |
| 357 | |
| 358 | listener_delegate = function(exec_state) { |
| 359 | CheckScopeChain([debug.ScopeType.Local, |
| 360 | debug.ScopeType.Block, |
| 361 | debug.ScopeType.Closure, |
| 362 | debug.ScopeType.Script, |
| 363 | debug.ScopeType.Global], exec_state); |
| 364 | CheckScopeContent({}, 0, exec_state); |
| 365 | CheckScopeContent({a:1,x:2,y:3}, 2, exec_state); |
| 366 | }; |
| 367 | closure_1(1)(); |
| 368 | EndTest(); |
| 369 | |
| 370 | |
| 371 | // Simple for-in loop over the keys of an object. |
| 372 | BeginTest("For loop 1"); |
| 373 | |
| 374 | function for_loop_1() { |
| 375 | for (let x in {y:undefined}) { |
| 376 | debugger; |
| 377 | } |
| 378 | } |
| 379 | |
| 380 | listener_delegate = function(exec_state) { |
| 381 | CheckScopeChain([debug.ScopeType.Block, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 382 | debug.ScopeType.Local, |
| 383 | debug.ScopeType.Script, |
| 384 | debug.ScopeType.Global], exec_state); |
| 385 | CheckScopeContent({x:'y'}, 0, exec_state); |
| 386 | // The function scope contains a temporary iteration variable, but it is |
| 387 | // hidden to the debugger. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 388 | }; |
| 389 | for_loop_1(); |
| 390 | EndTest(); |
| 391 | |
| 392 | |
| 393 | // For-in loop over the keys of an object with a block scoped let variable |
| 394 | // shadowing the iteration variable. |
| 395 | BeginTest("For loop 2"); |
| 396 | |
| 397 | function for_loop_2() { |
| 398 | for (let x in {y:undefined}) { |
| 399 | let x = 3; |
| 400 | debugger; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | listener_delegate = function(exec_state) { |
| 405 | CheckScopeChain([debug.ScopeType.Block, |
| 406 | debug.ScopeType.Block, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 407 | debug.ScopeType.Local, |
| 408 | debug.ScopeType.Script, |
| 409 | debug.ScopeType.Global], exec_state); |
| 410 | CheckScopeContent({x:3}, 0, exec_state); |
| 411 | CheckScopeContent({x:'y'}, 1, exec_state); |
| 412 | // The function scope contains a temporary iteration variable, hidden to the |
| 413 | // debugger. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 414 | }; |
| 415 | for_loop_2(); |
| 416 | EndTest(); |
| 417 | |
| 418 | |
| 419 | // Simple for loop. |
| 420 | BeginTest("For loop 3"); |
| 421 | |
| 422 | function for_loop_3() { |
| 423 | for (let x = 3; x < 4; ++x) { |
| 424 | debugger; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | listener_delegate = function(exec_state) { |
| 429 | CheckScopeChain([debug.ScopeType.Block, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 430 | debug.ScopeType.Local, |
| 431 | debug.ScopeType.Script, |
| 432 | debug.ScopeType.Global], exec_state); |
| 433 | CheckScopeContent({x:3}, 0, exec_state); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 434 | CheckScopeContent({}, 1, exec_state); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 435 | }; |
| 436 | for_loop_3(); |
| 437 | EndTest(); |
| 438 | |
| 439 | |
| 440 | // For loop with a block scoped let variable shadowing the iteration variable. |
| 441 | BeginTest("For loop 4"); |
| 442 | |
| 443 | function for_loop_4() { |
| 444 | for (let x = 3; x < 4; ++x) { |
| 445 | let x = 5; |
| 446 | debugger; |
| 447 | } |
| 448 | } |
| 449 | |
| 450 | listener_delegate = function(exec_state) { |
| 451 | CheckScopeChain([debug.ScopeType.Block, |
| 452 | debug.ScopeType.Block, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 453 | debug.ScopeType.Local, |
| 454 | debug.ScopeType.Script, |
| 455 | debug.ScopeType.Global], exec_state); |
| 456 | CheckScopeContent({x:5}, 0, exec_state); |
| 457 | CheckScopeContent({x:3}, 1, exec_state); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 458 | CheckScopeContent({}, 2, exec_state); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 459 | }; |
| 460 | for_loop_4(); |
| 461 | EndTest(); |
| 462 | |
| 463 | |
| 464 | // For loop with two variable declarations. |
| 465 | BeginTest("For loop 5"); |
| 466 | |
| 467 | function for_loop_5() { |
| 468 | for (let x = 3, y = 5; x < 4; ++x) { |
| 469 | debugger; |
| 470 | } |
| 471 | } |
| 472 | |
| 473 | listener_delegate = function(exec_state) { |
| 474 | CheckScopeChain([debug.ScopeType.Block, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 475 | debug.ScopeType.Local, |
| 476 | debug.ScopeType.Script, |
| 477 | debug.ScopeType.Global], exec_state); |
| 478 | CheckScopeContent({x:3,y:5}, 0, exec_state); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame^] | 479 | CheckScopeContent({}, 1, exec_state); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 480 | }; |
| 481 | for_loop_5(); |
| 482 | EndTest(); |
| 483 | |
| 484 | |
| 485 | // Uninitialized variables |
| 486 | BeginTest("Uninitialized 1"); |
| 487 | |
| 488 | function uninitialized_1() { |
| 489 | { |
| 490 | debugger; |
| 491 | let x = 1; |
| 492 | } |
| 493 | } |
| 494 | |
| 495 | listener_delegate = function(exec_state) { |
| 496 | CheckScopeChain([debug.ScopeType.Block, |
| 497 | debug.ScopeType.Local, |
| 498 | debug.ScopeType.Script, |
| 499 | debug.ScopeType.Global], exec_state); |
| 500 | CheckScopeContent({x:undefined}, 0, exec_state); |
| 501 | }; |
| 502 | uninitialized_1(); |
| 503 | EndTest(); |
| 504 | |
| 505 | |
| 506 | // Block scopes shadowing |
| 507 | BeginTest("Block scopes shadowing 1"); |
| 508 | function shadowing_1() { |
| 509 | let i = 0; |
| 510 | { |
| 511 | let i = 5; |
| 512 | debugger; |
| 513 | } |
| 514 | assertEquals(0, i); |
| 515 | } |
| 516 | |
| 517 | listener_delegate = function (exec_state) { |
| 518 | assertEqualsUnlessOptimized(5, exec_state.frame(0).evaluate("i").value()); |
| 519 | } |
| 520 | shadowing_1(); |
| 521 | EndTest(); |
| 522 | |
| 523 | |
| 524 | // Block scopes shadowing |
| 525 | BeginTest("Block scopes shadowing 2"); |
| 526 | function shadowing_2() { |
| 527 | let i = 0; |
| 528 | { |
| 529 | let j = 5; |
| 530 | debugger; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | listener_delegate = function (exec_state) { |
| 535 | assertEqualsUnlessOptimized(0, exec_state.frame(0).evaluate("i").value()); |
| 536 | assertEqualsUnlessOptimized(5, exec_state.frame(0).evaluate("j").value()); |
| 537 | } |
| 538 | shadowing_2(); |
| 539 | EndTest(); |