Module: Kernel

Included in:
Object
Defined in:
opal/opal/corelib/kernel.rb,
opal/opal/corelib/binding.rb,
opal/opal/corelib/unsupported.rb,
opal/opal/corelib/unsupported.rb,
opal/opal/corelib/unsupported.rb,
opal/opal/corelib/complex/base.rb,
opal/opal/corelib/kernel/format.rb,
opal/opal/corelib/rational/base.rb

Overview

helpers: coerce_to

Instance Method Summary collapse

Instance Method Details

#!~(obj) ⇒ Object 



9
10
11
 
# File 'opal/opal/corelib/kernel.rb', line 9

def !~(obj)
  !(self =~ obj)
end

#<=>(other) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'opal/opal/corelib/kernel.rb', line 17

def <=>(other)
  %x{
    // set guard for infinite recursion
    self.$$comparable = true;

    var x = #{self == other};

    if (x && x !== nil) {
      return 0;
    }

    return nil;
  }
end

#===(other) ⇒ Object 



13
14
15
 
# File 'opal/opal/corelib/kernel.rb', line 13

def ===(other)
  object_id == other.object_id || self == other
end

#=~(obj) ⇒ Object 



5
6
7
 
# File 'opal/opal/corelib/kernel.rb', line 5

def =~(obj)
  false
end

#Array(object) ⇒ Object 



64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
 
# File 'opal/opal/corelib/kernel.rb', line 64

def Array(object)
  %x{
    var coerced;

    if (object === nil) {
      return [];
    }

    if (object.$$is_array) {
      return object;
    }

    coerced = #{::Opal.coerce_to?(object, ::Array, :to_ary)};
    if (coerced !== nil) { return coerced; }

    coerced = #{::Opal.coerce_to?(object, ::Array, :to_a)};
    if (coerced !== nil) { return coerced; }

    return [object];
  }
end

#at_exit(&block) ⇒ Object 



86
87
88
89
90
 
# File 'opal/opal/corelib/kernel.rb', line 86

def at_exit(&block)
  $__at_exit__ ||= []
  $__at_exit__ << block
  block
end

#binding ⇒ Object 



48
49
50
 
# File 'opal/opal/corelib/binding.rb', line 48

def binding
  ::Kernel.raise "Opal doesn't support dynamic calls to binding"
end

#caller(start = 1, length = nil) ⇒ Object 



92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'opal/opal/corelib/kernel.rb', line 92

def caller(start = 1, length = nil)
  %x{
    var stack, result;

    stack = new Error().$backtrace();
    result = [];

    for (var i = #{start} + 1, ii = stack.length; i < ii; i++) {
      if (!stack[i].match(/runtime\.js/)) {
        result.push(stack[i]);
      }
    }
    if (length != nil) result = result.slice(0, length);
    return result;
  }
end

#caller_locations(*args) ⇒ Object 



109
110
111
112
113
 
# File 'opal/opal/corelib/kernel.rb', line 109

def caller_locations(*args)
  caller(*args).map do |loc|
    ::Thread::Backtrace::Location.new(loc)
  end
end

#catch(tag = nil) ⇒ Object 



772
773
774
775
776
777
778
 
# File 'opal/opal/corelib/kernel.rb', line 772

def catch(tag = nil)
  tag ||= ::Object.new
  yield(tag)
rescue ::UncaughtThrowError => e
  return e.value if e.tag == tag
  ::Kernel.raise
end

#class ⇒ Object 



115
116
117
 
# File 'opal/opal/corelib/kernel.rb', line 115

def class
  `self.$$class`
end

#clone(freeze: nil) ⇒ Object 



163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
 
# File 'opal/opal/corelib/kernel.rb', line 163

def clone(freeze: nil)
  unless freeze.nil? || freeze == true || freeze == false
    raise ArgumentError, "unexpected value for freeze: #{freeze.class}"
  end

  copy = self.class.allocate

  copy.copy_instance_variables(self)
  copy.copy_singleton_methods(self)
  copy.initialize_clone(self, freeze: freeze)

  if freeze == true || (freeze.nil? && frozen?)
    copy.freeze
  end

  copy
end

#Complex(real, imag = nil) ⇒ Object 



2
3
4
5
6
7
8
 
# File 'opal/opal/corelib/complex/base.rb', line 2

def Complex(real, imag = nil)
  if imag
    Complex.new(real, imag)
  else
    Complex.new(real, 0)
  end
end

#copy_instance_variables(other) ⇒ Object 



119
120
121
122
123
124
125
126
127
128
129
 
# File 'opal/opal/corelib/kernel.rb', line 119

def copy_instance_variables(other)
  %x{
    var keys = Object.keys(other), i, ii, name;
    for (i = 0, ii = keys.length; i < ii; i++) {
      name = keys[i];
      if (name.charAt(0) !== '$' && other.hasOwnProperty(name)) {
        self[name] = other[name];
      }
    }
  }
end

#copy_singleton_methods(other) ⇒ Object 



131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
 
# File 'opal/opal/corelib/kernel.rb', line 131

def copy_singleton_methods(other)
  %x{
    var i, name, names, length;

    if (other.hasOwnProperty('$$meta') && other.$$meta !== null) {
      var other_singleton_class = Opal.get_singleton_class(other);
      var self_singleton_class = Opal.get_singleton_class(self);
      names = Object.getOwnPropertyNames(other_singleton_class.$$prototype);

      for (i = 0, length = names.length; i < length; i++) {
        name = names[i];
        if (Opal.is_method(name)) {
          self_singleton_class.$$prototype[name] = other_singleton_class.$$prototype[name];
        }
      }

      self_singleton_class.$$const = Object.assign({}, other_singleton_class.$$const);
      Object.setPrototypeOf(
        self_singleton_class.$$prototype,
        Object.getPrototypeOf(other_singleton_class.$$prototype)
      );
    }

    for (i = 0, names = Object.getOwnPropertyNames(other), length = names.length; i < length; i++) {
      name = names[i];
      if (name.charAt(0) === '$' && name.charAt(1) !== '$' && other.hasOwnProperty(name)) {
        self[name] = other[name];
      }
    }
  }
end

#define_singleton_method(name, method = undefined, &block) ⇒ Object 



186
187
188
 
# File 'opal/opal/corelib/kernel.rb', line 186

def define_singleton_method(name, method = undefined, &block)
  singleton_class.define_method(name, method, &block)
end

#dup ⇒ Object 



190
191
192
193
194
195
196
197
 
# File 'opal/opal/corelib/kernel.rb', line 190

def dup
  copy = self.class.allocate

  copy.copy_instance_variables(self)
  copy.initialize_dup(self)

  copy
end

#enum_for(method = :each, *args, &block) ⇒ Object Also known as: to_enum 



203
204
205
 
# File 'opal/opal/corelib/kernel.rb', line 203

def enum_for(method = :each, *args, &block)
  ::Enumerator.for(self, method, *args, &block)
end

#equal?(other) ⇒ Boolean

Returns:



207
208
209
 
# File 'opal/opal/corelib/kernel.rb', line 207

def equal?(other)
  `self === other`
end

#eval ⇒ Object 



103
104
105
106
 
# File 'opal/opal/corelib/unsupported.rb', line 103

def eval(*)
  ::Kernel.raise ::NotImplementedError, "To use Kernel#eval, you must first require 'opal-parser'. "\
                                        "See https://github.com/opal/opal/blob/#{RUBY_ENGINE_VERSION}/docs/opal_parser.md for details."
end

#exit(status = true) ⇒ Object 



211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
 
# File 'opal/opal/corelib/kernel.rb', line 211

def exit(status = true)
  $__at_exit__ ||= []

  until $__at_exit__.empty?
    block = $__at_exit__.pop
    block.call
  end

  %x{
    if (status.$$is_boolean) {
      status = status ? 0 : 1;
    } else {
      status = $coerce_to(status, #{::Integer}, 'to_int')
    }

    Opal.exit(status);
  }
  nil
end

#extend(*mods) ⇒ Object 



231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
 
# File 'opal/opal/corelib/kernel.rb', line 231

def extend(*mods)
  %x{
    if (mods.length == 0) {
      #{raise ::ArgumentError, 'wrong number of arguments (given 0, expected 1+)'}
    }

    $deny_frozen_access(self);

    var singleton = #{singleton_class};

    for (var i = mods.length - 1; i >= 0; i--) {
      var mod = mods[i];

      if (!mod.$$is_module) {
        #{::Kernel.raise ::TypeError, "wrong argument type #{`mod`.class} (expected Module)"};
      }

      #{`mod`.append_features `singleton`};
      #{`mod`.extend_object self};
      #{`mod`.extended self};
    }
  }

  self
end

#Float(value) ⇒ Object 



480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
 
# File 'opal/opal/corelib/kernel.rb', line 480

def Float(value)
  %x{
    var str;

    if (value === nil) {
      #{::Kernel.raise ::TypeError, "can't convert nil into Float"}
    }

    if (value.$$is_string) {
      str = value.toString();

      str = str.replace(/(\d)_(?=\d)/g, '$1');

      //Special case for hex strings only:
      if (/^\s*[-+]?0[xX][0-9a-fA-F]+\s*$/.test(str)) {
        return #{::Kernel.Integer(`str`)};
      }

      if (!/^\s*[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\s*$/.test(str)) {
        #{::Kernel.raise ::ArgumentError, "invalid value for Float(): \"#{value}\""}
      }

      return parseFloat(str);
    }

    return #{::Opal.coerce_to!(value, ::Float, :to_f)};
  }
end

#format(format_string, *args) ⇒ Object Also known as: sprintf 



4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
 
# File 'opal/opal/corelib/kernel/format.rb', line 4

def format(format_string, *args)
  if args.length == 1 && args[0].respond_to?(:to_ary)
    ary = ::Opal.coerce_to?(args[0], ::Array, :to_ary)
    args = ary.to_a unless ary.nil?
  end

  %x{
    var result = '',
        //used for slicing:
        begin_slice = 0,
        end_slice,
        //used for iterating over the format string:
        i,
        len = format_string.length,
        //used for processing field values:
        arg,
        str,
        //used for processing %g and %G fields:
        exponent,
        //used for keeping track of width and precision:
        width,
        precision,
        //used for holding temporary values:
        tmp_num,
        //used for processing %{} and %<> fileds:
        hash_parameter_key,
        closing_brace_char,
        //used for processing %b, %B, %o, %x, and %X fields:
        base_number,
        base_prefix,
        base_neg_zero_regex,
        base_neg_zero_digit,
        //used for processing arguments:
        next_arg,
        seq_arg_num = 1,
        pos_arg_num = 0,
        //used for keeping track of flags:
        flags,
        FNONE  = 0,
        FSHARP = 1,
        FMINUS = 2,
        FPLUS  = 4,
        FZERO  = 8,
        FSPACE = 16,
        FWIDTH = 32,
        FPREC  = 64,
        FPREC0 = 128;

    function CHECK_FOR_FLAGS() {
      if (flags&FWIDTH) { #{::Kernel.raise ::ArgumentError, 'flag after width'} }
      if (flags&FPREC0) { #{::Kernel.raise ::ArgumentError, 'flag after precision'} }
    }

    function CHECK_FOR_WIDTH() {
      if (flags&FWIDTH) { #{::Kernel.raise ::ArgumentError, 'width given twice'} }
      if (flags&FPREC0) { #{::Kernel.raise ::ArgumentError, 'width after precision'} }
    }

    function GET_NTH_ARG(num) {
      if (num >= args.length) { #{::Kernel.raise ::ArgumentError, 'too few arguments'} }
      return args[num];
    }

    function GET_NEXT_ARG() {
      switch (pos_arg_num) {
      case -1: #{::Kernel.raise ::ArgumentError, "unnumbered(#{`seq_arg_num`}) mixed with numbered"} // raise
      case -2: #{::Kernel.raise ::ArgumentError, "unnumbered(#{`seq_arg_num`}) mixed with named"} // raise
      }
      pos_arg_num = seq_arg_num++;
      return GET_NTH_ARG(pos_arg_num - 1);
    }

    function GET_POS_ARG(num) {
      if (pos_arg_num > 0) {
        #{::Kernel.raise ::ArgumentError, "numbered(#{`num`}) after unnumbered(#{`pos_arg_num`})"}
      }
      if (pos_arg_num === -2) {
        #{::Kernel.raise ::ArgumentError, "numbered(#{`num`}) after named"}
      }
      if (num < 1) {
        #{::Kernel.raise ::ArgumentError, "invalid index - #{`num`}$"}
      }
      pos_arg_num = -1;
      return GET_NTH_ARG(num - 1);
    }

    function GET_ARG() {
      return (next_arg === undefined ? GET_NEXT_ARG() : next_arg);
    }

    function READ_NUM(label) {
      var num, str = '';
      for (;; i++) {
        if (i === len) {
          #{::Kernel.raise ::ArgumentError, 'malformed format string - %*[0-9]'}
        }
        if (format_string.charCodeAt(i) < 48 || format_string.charCodeAt(i) > 57) {
          i--;
          num = parseInt(str, 10) || 0;
          if (num > 2147483647) {
            #{::Kernel.raise ::ArgumentError, "#{`label`} too big"}
          }
          return num;
        }
        str += format_string.charAt(i);
      }
    }

    function READ_NUM_AFTER_ASTER(label) {
      var arg, num = READ_NUM(label);
      if (format_string.charAt(i + 1) === '$') {
        i++;
        arg = GET_POS_ARG(num);
      } else {
        arg = GET_NEXT_ARG();
      }
      return #{`arg`.to_int};
    }

    for (i = format_string.indexOf('%'); i !== -1; i = format_string.indexOf('%', i)) {
      str = undefined;

      flags = FNONE;
      width = -1;
      precision = -1;
      next_arg = undefined;

      end_slice = i;

      i++;

      switch (format_string.charAt(i)) {
      case '%':
        begin_slice = i;
        // no-break
      case '':
      case '\n':
      case '\0':
        i++;
        continue;
      }

      format_sequence: for (; i < len; i++) {
        switch (format_string.charAt(i)) {

        case ' ':
          CHECK_FOR_FLAGS();
          flags |= FSPACE;
          continue format_sequence;

        case '#':
          CHECK_FOR_FLAGS();
          flags |= FSHARP;
          continue format_sequence;

        case '+':
          CHECK_FOR_FLAGS();
          flags |= FPLUS;
          continue format_sequence;

        case '-':
          CHECK_FOR_FLAGS();
          flags |= FMINUS;
          continue format_sequence;

        case '0':
          CHECK_FOR_FLAGS();
          flags |= FZERO;
          continue format_sequence;

        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
          tmp_num = READ_NUM('width');
          if (format_string.charAt(i + 1) === '$') {
            if (i + 2 === len) {
              str = '%';
              i++;
              break format_sequence;
            }
            if (next_arg !== undefined) {
              #{::Kernel.raise ::ArgumentError, "value given twice - %#{`tmp_num`}$"}
            }
            next_arg = GET_POS_ARG(tmp_num);
            i++;
          } else {
            CHECK_FOR_WIDTH();
            flags |= FWIDTH;
            width = tmp_num;
          }
          continue format_sequence;

        case '<':
        case '\{':
          closing_brace_char = (format_string.charAt(i) === '<' ? '>' : '\}');
          hash_parameter_key = '';

          i++;

          for (;; i++) {
            if (i === len) {
              #{::Kernel.raise ::ArgumentError, 'malformed name - unmatched parenthesis'}
            }
            if (format_string.charAt(i) === closing_brace_char) {

              if (pos_arg_num > 0) {
                #{::Kernel.raise ::ArgumentError, "named #{`hash_parameter_key`} after unnumbered(#{`pos_arg_num`})"}
              }
              if (pos_arg_num === -1) {
                #{::Kernel.raise ::ArgumentError, "named #{`hash_parameter_key`} after numbered"}
              }
              pos_arg_num = -2;

              if (args[0] === undefined || !args[0].$$is_hash) {
                #{::Kernel.raise ::ArgumentError, 'one hash required'}
              }

              next_arg = #{`args[0]`.fetch(`hash_parameter_key`)};

              if (closing_brace_char === '>') {
                continue format_sequence;
              } else {
                str = next_arg.toString();
                if (precision !== -1) { str = str.slice(0, precision); }
                if (flags&FMINUS) {
                  while (str.length < width) { str = str + ' '; }
                } else {
                  while (str.length < width) { str = ' ' + str; }
                }
                break format_sequence;
              }
            }
            hash_parameter_key += format_string.charAt(i);
          }
          // raise

        case '*':
          i++;
          CHECK_FOR_WIDTH();
          flags |= FWIDTH;
          width = READ_NUM_AFTER_ASTER('width');
          if (width < 0) {
            flags |= FMINUS;
            width = -width;
          }
          continue format_sequence;

        case '.':
          if (flags&FPREC0) {
            #{::Kernel.raise ::ArgumentError, 'precision given twice'}
          }
          flags |= FPREC|FPREC0;
          precision = 0;
          i++;
          if (format_string.charAt(i) === '*') {
            i++;
            precision = READ_NUM_AFTER_ASTER('precision');
            if (precision < 0) {
              flags &= ~FPREC;
            }
            continue format_sequence;
          }
          precision = READ_NUM('precision');
          continue format_sequence;

        case 'd':
        case 'i':
        case 'u':
          arg = #{::Kernel.Integer(`GET_ARG()`)};
          if (arg >= 0) {
            str = arg.toString();
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0)) { str = '0' + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            str = (-arg).toString();
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              str = '-' + str;
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - 1) { str = '0' + str; }
                str = '-' + str;
              } else {
                str = '-' + str;
                while (str.length < width) { str = ' ' + str; }
              }
            }
          }
          break format_sequence;

        case 'b':
        case 'B':
        case 'o':
        case 'x':
        case 'X':
          switch (format_string.charAt(i)) {
          case 'b':
          case 'B':
            base_number = 2;
            base_prefix = '0b';
            base_neg_zero_regex = /^1+/;
            base_neg_zero_digit = '1';
            break;
          case 'o':
            base_number = 8;
            base_prefix = '0';
            base_neg_zero_regex = /^3?7+/;
            base_neg_zero_digit = '7';
            break;
          case 'x':
          case 'X':
            base_number = 16;
            base_prefix = '0x';
            base_neg_zero_regex = /^f+/;
            base_neg_zero_digit = 'f';
            break;
          }
          arg = #{::Kernel.Integer(`GET_ARG()`)};
          if (arg >= 0) {
            str = arg.toString(base_number);
            while (str.length < precision) { str = '0' + str; }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && precision === -1) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0) - ((flags&FSHARP && arg !== 0) ? base_prefix.length : 0)) { str = '0' + str; }
                if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FSHARP && arg !== 0) { str = base_prefix + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            if (flags&FPLUS || flags&FSPACE) {
              str = (-arg).toString(base_number);
              while (str.length < precision) { str = '0' + str; }
              if (flags&FMINUS) {
                if (flags&FSHARP) { str = base_prefix + str; }
                str = '-' + str;
                while (str.length < width) { str = str + ' '; }
              } else {
                if (flags&FZERO && precision === -1) {
                  while (str.length < width - 1 - (flags&FSHARP ? 2 : 0)) { str = '0' + str; }
                  if (flags&FSHARP) { str = base_prefix + str; }
                  str = '-' + str;
                } else {
                  if (flags&FSHARP) { str = base_prefix + str; }
                  str = '-' + str;
                  while (str.length < width) { str = ' ' + str; }
                }
              }
            } else {
              str = (arg >>> 0).toString(base_number).replace(base_neg_zero_regex, base_neg_zero_digit);
              while (str.length < precision - 2) { str = base_neg_zero_digit + str; }
              if (flags&FMINUS) {
                str = '..' + str;
                if (flags&FSHARP) { str = base_prefix + str; }
                while (str.length < width) { str = str + ' '; }
              } else {
                if (flags&FZERO && precision === -1) {
                  while (str.length < width - 2 - (flags&FSHARP ? base_prefix.length : 0)) { str = base_neg_zero_digit + str; }
                  str = '..' + str;
                  if (flags&FSHARP) { str = base_prefix + str; }
                } else {
                  str = '..' + str;
                  if (flags&FSHARP) { str = base_prefix + str; }
                  while (str.length < width) { str = ' ' + str; }
                }
              }
            }
          }
          if (format_string.charAt(i) === format_string.charAt(i).toUpperCase()) {
            str = str.toUpperCase();
          }
          break format_sequence;

        case 'f':
        case 'e':
        case 'E':
        case 'g':
        case 'G':
          arg = #{::Kernel.Float(`GET_ARG()`)};
          if (arg >= 0 || isNaN(arg)) {
            if (arg === Infinity) {
              str = 'Inf';
            } else {
              switch (format_string.charAt(i)) {
              case 'f':
                str = arg.toFixed(precision === -1 ? 6 : precision);
                break;
              case 'e':
              case 'E':
                str = arg.toExponential(precision === -1 ? 6 : precision);
                break;
              case 'g':
              case 'G':
                str = arg.toExponential();
                exponent = parseInt(str.split('e')[1], 10);
                if (!(exponent < -4 || exponent >= (precision === -1 ? 6 : precision))) {
                  str = arg.toPrecision(precision === -1 ? (flags&FSHARP ? 6 : undefined) : precision);
                }
                break;
              }
            }
            if (flags&FMINUS) {
              if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && arg !== Infinity && !isNaN(arg)) {
                while (str.length < width - ((flags&FPLUS || flags&FSPACE) ? 1 : 0)) { str = '0' + str; }
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
              } else {
                if (flags&FPLUS || flags&FSPACE) { str = (flags&FPLUS ? '+' : ' ') + str; }
                while (str.length < width) { str = ' ' + str; }
              }
            }
          } else {
            if (arg === -Infinity) {
              str = 'Inf';
            } else {
              switch (format_string.charAt(i)) {
              case 'f':
                str = (-arg).toFixed(precision === -1 ? 6 : precision);
                break;
              case 'e':
              case 'E':
                str = (-arg).toExponential(precision === -1 ? 6 : precision);
                break;
              case 'g':
              case 'G':
                str = (-arg).toExponential();
                exponent = parseInt(str.split('e')[1], 10);
                if (!(exponent < -4 || exponent >= (precision === -1 ? 6 : precision))) {
                  str = (-arg).toPrecision(precision === -1 ? (flags&FSHARP ? 6 : undefined) : precision);
                }
                break;
              }
            }
            if (flags&FMINUS) {
              str = '-' + str;
              while (str.length < width) { str = str + ' '; }
            } else {
              if (flags&FZERO && arg !== -Infinity) {
                while (str.length < width - 1) { str = '0' + str; }
                str = '-' + str;
              } else {
                str = '-' + str;
                while (str.length < width) { str = ' ' + str; }
              }
            }
          }
          if (format_string.charAt(i) === format_string.charAt(i).toUpperCase() && arg !== Infinity && arg !== -Infinity && !isNaN(arg)) {
            str = str.toUpperCase();
          }
          str = str.replace(/([eE][-+]?)([0-9])$/, '$10$2');
          break format_sequence;

        case 'a':
        case 'A':
          // Not implemented because there are no specs for this field type.
          #{::Kernel.raise ::NotImplementedError, '`A` and `a` format field types are not implemented in Opal yet'}
          // raise

        case 'c':
          arg = GET_ARG();
          if (#{`arg`.respond_to?(:to_ary)}) { arg = #{`arg`.to_ary}[0]; }
          if (#{`arg`.respond_to?(:to_str)}) {
            str = #{`arg`.to_str};
          } else {
            str = String.fromCharCode($coerce_to(arg, #{::Integer}, 'to_int'));
          }
          if (str.length !== 1) {
            #{::Kernel.raise ::ArgumentError, '%c requires a character'}
          }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        case 'p':
          str = #{`GET_ARG()`.inspect};
          if (precision !== -1) { str = str.slice(0, precision); }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        case 's':
          str = #{`GET_ARG()`.to_s};
          if (precision !== -1) { str = str.slice(0, precision); }
          if (flags&FMINUS) {
            while (str.length < width) { str = str + ' '; }
          } else {
            while (str.length < width) { str = ' ' + str; }
          }
          break format_sequence;

        default:
          #{::Kernel.raise ::ArgumentError, "malformed format string - %#{`format_string.charAt(i)`}"}
        }
      }

      if (str === undefined) {
        #{::Kernel.raise ::ArgumentError, 'malformed format string - %'}
      }

      result += format_string.slice(begin_slice, end_slice) + str;
      begin_slice = i + 1;
    }

    if (#{$DEBUG} && pos_arg_num >= 0 && seq_arg_num < args.length) {
      #{::Kernel.raise ::ArgumentError, 'too many arguments for format string'}
    }

    return result + format_string.slice(begin_slice);
  }
end

#freeze ⇒ Object 



257
258
259
260
261
262
263
264
265
266
267
 
# File 'opal/opal/corelib/kernel.rb', line 257

def freeze
  return self if frozen?

  %x{
    if (typeof(self) === "object") {
      $freeze_props(self);
      return $freeze(self);
    }
    return self;
  }
end

#frozen? ⇒ Boolean

Returns:



269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
 
# File 'opal/opal/corelib/kernel.rb', line 269

def frozen?
  %x{
    switch (typeof(self)) {
    case "string":
    case "symbol":
    case "number":
    case "boolean":
      return true;
    case "object":
      return (self.$$frozen || false);
    default:
      return false;
    }
  }
end

#gets(*args) ⇒ Object 



285
286
287
 
# File 'opal/opal/corelib/kernel.rb', line 285

def gets(*args)
  $stdin.gets(*args)
end

#hash ⇒ Object 



289
290
291
 
# File 'opal/opal/corelib/kernel.rb', line 289

def hash
  __id__
end

#Hash(arg) ⇒ Object 



509
510
511
512
513
 
# File 'opal/opal/corelib/kernel.rb', line 509

def Hash(arg)
  return {} if arg.nil? || arg == []
  return arg if ::Hash === arg
  ::Opal.coerce_to!(arg, ::Hash, :to_hash)
end

#initialize_clone(other, freeze: nil) ⇒ Object 



181
182
183
184
 
# File 'opal/opal/corelib/kernel.rb', line 181

def initialize_clone(other, freeze: nil)
  initialize_copy(other)
  self
end

#initialize_copy(other) ⇒ Object 



293
294
 
# File 'opal/opal/corelib/kernel.rb', line 293

def initialize_copy(other)
end

#initialize_dup(other) ⇒ Object 



199
200
201
 
# File 'opal/opal/corelib/kernel.rb', line 199

def initialize_dup(other)
  initialize_copy(other)
end

#inspect ⇒ Object 



298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
 
# File 'opal/opal/corelib/kernel.rb', line 298

def inspect
  ivs = ''
  id = __id__
  if `inspect_stack`.include? id
    ivs = ' ...'
  else
    `inspect_stack` << id
    pushed = true
    instance_variables.each do |i|
      ivar = instance_variable_get(i)
      inspect = Opal.inspect(ivar)
      ivs += " #{i}=#{inspect}"
    end
  end
  "#<#{self.class}:0x#{id.to_s(16)}#{ivs}>"
rescue => e
  "#<#{self.class}:0x#{id.to_s(16)}>"
ensure
  `inspect_stack`.pop if pushed
end

#instance_of?(klass) ⇒ Boolean

Returns:



319
320
321
322
323
324
325
326
327
 
# File 'opal/opal/corelib/kernel.rb', line 319

def instance_of?(klass)
  %x{
    if (!klass.$$is_class && !klass.$$is_module) {
      #{::Kernel.raise ::TypeError, 'class or module required'};
    }

    return self.$$class === klass;
  }
end

#instance_variable_defined?(name) ⇒ Boolean

Returns:



329
330
331
332
333
 
# File 'opal/opal/corelib/kernel.rb', line 329

def instance_variable_defined?(name)
  name = ::Opal.instance_variable_name!(name)

  `Opal.hasOwnProperty.call(self, name.substr(1))`
end

#instance_variable_get(name) ⇒ Object 



335
336
337
338
339
340
341
342
343
 
# File 'opal/opal/corelib/kernel.rb', line 335

def instance_variable_get(name)
  name = ::Opal.instance_variable_name!(name)

  %x{
    var ivar = self[Opal.ivar(name.substr(1))];

    return ivar == null ? nil : ivar;
  }
end

#instance_variable_set(name, value) ⇒ Object 



345
346
347
348
349
350
351
 
# File 'opal/opal/corelib/kernel.rb', line 345

def instance_variable_set(name, value)
  `$deny_frozen_access(self)`

  name = ::Opal.instance_variable_name!(name)

  `self[Opal.ivar(name.substr(1))] = value`
end

#instance_variables ⇒ Object 



369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
 
# File 'opal/opal/corelib/kernel.rb', line 369

def instance_variables
  %x{
    var result = [], ivar;

    for (var name in self) {
      if (self.hasOwnProperty(name) && name.charAt(0) !== '$') {
        if (name.substr(-1) === '$') {
          ivar = name.slice(0, name.length - 1);
        } else {
          ivar = name;
        }
        result.push('@' + ivar);
      }
    }

    return result;
  }
end

#Integer(value, base = undefined) ⇒ Object 



388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
 
# File 'opal/opal/corelib/kernel.rb', line 388

def Integer(value, base = undefined)
  %x{
    var i, str, base_digits;

    if (!value.$$is_string) {
      if (base !== undefined) {
        #{::Kernel.raise ::ArgumentError, 'base specified for non string value'}
      }
      if (value === nil) {
        #{::Kernel.raise ::TypeError, "can't convert nil into Integer"}
      }
      if (value.$$is_number) {
        if (value === Infinity || value === -Infinity || isNaN(value)) {
          #{::Kernel.raise ::FloatDomainError, value}
        }
        return Math.floor(value);
      }
      if (#{value.respond_to?(:to_int)}) {
        i = #{value.to_int};
        if (i !== nil) {
          return i;
        }
      }
      return #{::Opal.coerce_to!(value, ::Integer, :to_i)};
    }

    if (value === "0") {
      return 0;
    }

    if (base === undefined) {
      base = 0;
    } else {
      base = $coerce_to(base, #{::Integer}, 'to_int');
      if (base === 1 || base < 0 || base > 36) {
        #{::Kernel.raise ::ArgumentError, "invalid radix #{base}"}
      }
    }

    str = value.toLowerCase();

    str = str.replace(/(\d)_(?=\d)/g, '$1');

    str = str.replace(/^(\s*[+-]?)(0[bodx]?)/, function (_, head, flag) {
      switch (flag) {
      case '0b':
        if (base === 0 || base === 2) {
          base = 2;
          return head;
        }
        // no-break
      case '0':
      case '0o':
        if (base === 0 || base === 8) {
          base = 8;
          return head;
        }
        // no-break
      case '0d':
        if (base === 0 || base === 10) {
          base = 10;
          return head;
        }
        // no-break
      case '0x':
        if (base === 0 || base === 16) {
          base = 16;
          return head;
        }
        // no-break
      }
      #{::Kernel.raise ::ArgumentError, "invalid value for Integer(): \"#{value}\""}
    });

    base = (base === 0 ? 10 : base);

    base_digits = '0-' + (base <= 10 ? base - 1 : '9a-' + String.fromCharCode(97 + (base - 11)));

    if (!(new RegExp('^\\s*[+-]?[' + base_digits + ']+\\s*$')).test(str)) {
      #{::Kernel.raise ::ArgumentError, "invalid value for Integer(): \"#{value}\""}
    }

    i = parseInt(str, base);

    if (isNaN(i)) {
      #{::Kernel.raise ::ArgumentError, "invalid value for Integer(): \"#{value}\""}
    }

    return i;
  }
end

#is_a?(klass) ⇒ Boolean Also known as: kind_of?

Returns:



515
516
517
518
519
520
521
522
523
 
# File 'opal/opal/corelib/kernel.rb', line 515

def is_a?(klass)
  %x{
    if (!klass.$$is_class && !klass.$$is_module) {
      #{::Kernel.raise ::TypeError, 'class or module required'};
    }

    return Opal.is_a(self, klass);
  }
end

#itself ⇒ Object 



525
526
527
 
# File 'opal/opal/corelib/kernel.rb', line 525

def itself
  self
end

#lambda(&block) ⇒ Object 



529
530
531
 
# File 'opal/opal/corelib/kernel.rb', line 529

def lambda(&block)
  `Opal.lambda(block)`
end

#load(file) ⇒ Object 



533
534
535
536
 
# File 'opal/opal/corelib/kernel.rb', line 533

def load(file)
  file = ::Opal.coerce_to!(file, ::String, :to_str)
  `Opal.load(#{file})`
end

#loop ⇒ Object 



538
539
540
541
542
543
544
545
546
547
548
549
550
 
# File 'opal/opal/corelib/kernel.rb', line 538

def loop
  return enum_for(:loop) { ::Float::INFINITY } unless block_given?

  while true
    begin
      yield
    rescue ::StopIteration => e
      return e.result
    end
  end

  self
end

#method(name) ⇒ Object 



32
33
34
35
36
37
38
39
40
41
42
 
# File 'opal/opal/corelib/kernel.rb', line 32

def method(name)
  %x{
    var meth = self[$jsid(name)];

    if (!meth || meth.$$stub) {
      #{::Kernel.raise ::NameError.new("undefined method `#{name}' for class `#{self.class}'", name)};
    }

    return #{::Method.new(self, `meth.$$owner || #{self.class}`, `meth`, name)};
  }
end

#methods(all = true) ⇒ Object 



44
45
46
47
48
49
50
51
52
 
# File 'opal/opal/corelib/kernel.rb', line 44

def methods(all = true)
  %x{
    if ($truthy(#{all})) {
      return Opal.methods(self);
    } else {
      return Opal.own_methods(self);
    }
  }
end

#nil? ⇒ Boolean

Returns:



552
553
554
 
# File 'opal/opal/corelib/kernel.rb', line 552

def nil?
  false
end

#open(*args, &block) ⇒ Object

basic implementation of open, delegate to File.open



785
786
787
 
# File 'opal/opal/corelib/kernel.rb', line 785

def open(*args, &block)
  ::File.open(*args, &block)
end

#p(*args) ⇒ Object 



577
578
579
580
581
 
# File 'opal/opal/corelib/kernel.rb', line 577

def p(*args)
  args.each { |obj| $stdout.puts obj.inspect }

  args.length <= 1 ? args[0] : args
end

#print(*strs) ⇒ Object 



583
584
585
 
# File 'opal/opal/corelib/kernel.rb', line 583

def print(*strs)
  $stdout.print(*strs)
end

#printf(*args) ⇒ Object 



556
557
558
559
560
561
562
 
# File 'opal/opal/corelib/kernel.rb', line 556

def printf(*args)
  if args.any?
    print format(*args)
  end

  nil
end

#private_methods(*methods) ⇒ Object Also known as: protected_methods, private_instance_methods, protected_instance_methods 



93
94
95
 
# File 'opal/opal/corelib/unsupported.rb', line 93

def private_methods(*methods)
  []
end

#proc(&block) ⇒ Object 



564
565
566
567
568
569
570
571
 
# File 'opal/opal/corelib/kernel.rb', line 564

def proc(&block)
  unless block
    ::Kernel.raise ::ArgumentError, 'tried to create Proc object without a block'
  end

  `block.$$is_lambda = false`
  block
end

#public_methods(all = true) ⇒ Object 



54
55
56
57
58
59
60
61
62
 
# File 'opal/opal/corelib/kernel.rb', line 54

def public_methods(all = true)
  %x{
    if ($truthy(#{all})) {
      return Opal.methods(self);
    } else {
      return Opal.receiver_methods(self);
    }
  }
end

#puts(*strs) ⇒ Object 



573
574
575
 
# File 'opal/opal/corelib/kernel.rb', line 573

def puts(*strs)
  $stdout.puts(*strs)
end

#raise(exception = undefined, string = nil, backtrace = nil) ⇒ Object Also known as: fail 



603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
 
# File 'opal/opal/corelib/kernel.rb', line 603

def raise(exception = undefined, string = nil, backtrace = nil)
  %x{
    if (exception == null && #{$!} !== nil) {
      throw #{$!};
    }
    if (exception == null) {
      exception = #{::RuntimeError.new ''};
    }
    else if ($respond_to(exception, '$to_str')) {
      exception = #{::RuntimeError.new exception.to_str};
    }
    // using respond_to? and not an undefined check to avoid method_missing matching as true
    else if (exception.$$is_class && $respond_to(exception, '$exception')) {
      exception = #{exception.exception string};
    }
    else if (exception.$$is_exception) {
      // exception is fine
    }
    else {
      exception = #{::TypeError.new 'exception class/object expected'};
    }

    if (backtrace !== nil) {
      exception.$set_backtrace(backtrace);
    }

    if (#{$!} !== nil) {
      Opal.exceptions.push(#{$!});
    }

    #{$!} = exception;
    #{$@} = #{`exception`.backtrace};

    throw exception;
  }
end

#rand(max = undefined) ⇒ Object 



640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
 
# File 'opal/opal/corelib/kernel.rb', line 640

def rand(max = undefined)
  %x{
    if (max === undefined) {
      return #{::Random::DEFAULT.rand};
    }

    if (max.$$is_number) {
      if (max < 0) {
        max = Math.abs(max);
      }

      if (max % 1 !== 0) {
        max = max.$to_i();
      }

      if (max === 0) {
        max = undefined;
      }
    }
  }
  ::Random::DEFAULT.rand(max)
end

#Rational(numerator, denominator = 1) ⇒ Object 



2
3
4
 
# File 'opal/opal/corelib/rational/base.rb', line 2

def Rational(numerator, denominator = 1)
  ::Rational.convert(numerator, denominator)
end

#readline(*args) ⇒ Object 



587
588
589
 
# File 'opal/opal/corelib/kernel.rb', line 587

def readline(*args)
  $stdin.readline(*args)
end

#remove_instance_variable(name) ⇒ Object 



353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
 
# File 'opal/opal/corelib/kernel.rb', line 353

def remove_instance_variable(name)
  name = ::Opal.instance_variable_name!(name)

  %x{
    var key = Opal.ivar(name.substr(1)),
        val;
    if (self.hasOwnProperty(key)) {
      val = self[key];
      delete self[key];
      return val;
    }
  }

  ::Kernel.raise ::NameError, "instance variable #{name} not defined"
end

#require(file) ⇒ Object 



685
686
687
688
689
690
691
692
693
694
 
# File 'opal/opal/corelib/kernel.rb', line 685

def require(file)
  %x{
    // As Object.require refers to Kernel.require once Kernel has been loaded the String
    // class may not be available yet, the coercion requires both  String and Array to be loaded.
    if (typeof #{file} !== 'string' && Opal.String && Opal.Array) {
      #{file = ::Opal.coerce_to!(file, ::String, :to_str) }
    }
    return Opal.require(#{file})
  }
end

#require_relative(file) ⇒ Object 



696
697
698
699
700
701
 
# File 'opal/opal/corelib/kernel.rb', line 696

def require_relative(file)
  ::Opal.try_convert!(file, ::String, :to_str)
  file = ::File.expand_path ::File.join(`Opal.current_file`, '..', file)

  `Opal.require(#{file})`
end

#require_tree(path, autoload: false) ⇒ Object

path should be the full path to be found in registered modules (Opal.modules)



704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
 
# File 'opal/opal/corelib/kernel.rb', line 704

def require_tree(path, autoload: false)
  %x{
    var result = [];

    path = #{::File.expand_path(path)}
    path = Opal.normalize(path);
    if (path === '.') path = '';
    for (var name in Opal.modules) {
      if (#{`name`.start_with?(path)}) {
        if(!#{autoload}) {
          result.push([name, Opal.require(name)]);
        } else {
          result.push([name, true]); // do nothing, delegated to a autoloading
        }
      }
    }

    return result;
  }
end

#respond_to?(name, include_all = false) ⇒ Boolean

Returns:



663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
 
# File 'opal/opal/corelib/kernel.rb', line 663

def respond_to?(name, include_all = false)
  %x{
    var body = self[$jsid(name)];

    if (typeof(body) === "function" && !body.$$stub) {
      return true;
    }

    if (self['$respond_to_missing?'].$$pristine === true) {
      return false;
    } else {
      return #{respond_to_missing?(name, include_all)};
    }
  }
end

#respond_to_missing?(method_name, include_all = false) ⇒ Boolean

Returns:



679
680
681
 
# File 'opal/opal/corelib/kernel.rb', line 679

def respond_to_missing?(method_name, include_all = false)
  false
end

#singleton_class ⇒ Object 



725
726
727
 
# File 'opal/opal/corelib/kernel.rb', line 725

def singleton_class
  `Opal.get_singleton_class(self)`
end

#sleep(seconds = nil) ⇒ Object 



729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
 
# File 'opal/opal/corelib/kernel.rb', line 729

def sleep(seconds = nil)
  %x{
    if (seconds === nil) {
      #{::Kernel.raise ::TypeError, "can't convert NilClass into time interval"}
    }
    if (!seconds.$$is_number) {
      #{::Kernel.raise ::TypeError, "can't convert #{seconds.class} into time interval"}
    }
    if (seconds < 0) {
      #{::Kernel.raise ::ArgumentError, 'time interval must be positive'}
    }
    var get_time = Opal.global.performance ?
      function() {return performance.now()} :
      function() {return new Date()}

    var t = get_time();
    while (get_time() - t <= seconds * 1000);
    return Math.round(seconds);
  }
end

#srand(seed = Random.new_seed) ⇒ Object 



750
751
752
 
# File 'opal/opal/corelib/kernel.rb', line 750

def srand(seed = Random.new_seed)
  ::Random.srand(seed)
end

#String(str) ⇒ Object 



754
755
756
757
 
# File 'opal/opal/corelib/kernel.rb', line 754

def String(str)
  ::Opal.coerce_to?(str, ::String, :to_str) ||
    ::Opal.coerce_to!(str, ::String, :to_s)
end

#taint ⇒ Object 



44
45
46
47
 
# File 'opal/opal/corelib/unsupported.rb', line 44

def taint
  `handle_unsupported_feature(ERROR)`
  self
end

#tainted? ⇒ Boolean

Returns:



54
55
56
57
 
# File 'opal/opal/corelib/unsupported.rb', line 54

def tainted?
  `handle_unsupported_feature(ERROR)`
  false
end

#tap {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:

  • _self (Kernel) —

    the object that the method was called on



759
760
761
762
 
# File 'opal/opal/corelib/kernel.rb', line 759

def tap(&block)
  yield self
  self
end

#throw(tag, obj = nil) ⇒ Object 



780
781
782
 
# File 'opal/opal/corelib/kernel.rb', line 780

def throw(tag, obj = nil)
  ::Kernel.raise ::UncaughtThrowError.new(tag, obj)
end

#to_proc ⇒ Object 



764
765
766
 
# File 'opal/opal/corelib/kernel.rb', line 764

def to_proc
  self
end

#to_s ⇒ Object 



768
769
770
 
# File 'opal/opal/corelib/kernel.rb', line 768

def to_s
  "#<#{self.class}:0x#{__id__.to_s(16)}>"
end

#untaint ⇒ Object 



49
50
51
52
 
# File 'opal/opal/corelib/unsupported.rb', line 49

def untaint
  `handle_unsupported_feature(ERROR)`
  self
end

#warn(*strs, uplevel: nil) ⇒ Object 



591
592
593
594
595
596
597
598
599
600
601
 
# File 'opal/opal/corelib/kernel.rb', line 591

def warn(*strs, uplevel: nil)
  if uplevel
    uplevel = ::Opal.coerce_to!(uplevel, ::Integer, :to_str)
    ::Kernel.raise ::ArgumentError, "negative level (#{uplevel})" if uplevel < 0
    location = caller(uplevel + 1, 1).first&.split(':in `')&.first
    location = "#{location}: " if location
    strs = strs.map { |s| "#{location}warning: #{s}" }
  end

  $stderr.puts(*strs) unless $VERBOSE.nil? || strs.empty?
end

#yield_self {|_self| ... } ⇒ Object Also known as: then

Yields:

  • (_self)

Yield Parameters:

  • _self (Kernel) —

    the object that the method was called on



789
790
791
792
 
# File 'opal/opal/corelib/kernel.rb', line 789

def yield_self
  return enum_for(:yield_self) { 1 } unless block_given?
  yield self
end