Source

pypy / pypy / rpython / ootypesystem / rclass.py

  1
  2
  3
  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
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
import types
from pypy.annotation import model as annmodel
from pypy.annotation import description
from pypy.objspace.flow import model as flowmodel
from pypy.rpython.rmodel import inputconst, TyperError, warning
from pypy.rpython.rmodel import mangle as pbcmangle
from pypy.rpython.rclass import AbstractClassRepr, AbstractInstanceRepr, \
                                getinstancerepr, getclassrepr, get_type_repr
from pypy.rpython.ootypesystem import ootype
from pypy.rpython.exceptiondata import standardexceptions
from pypy.tool.pairtype import pairtype
from pypy.tool.sourcetools import func_with_new_name
from pypy.tool.identity_dict import identity_dict

OBJECT = ootype.ROOT
META = ootype.Instance("Meta", ootype.ROOT,
                       fields={"class_": ootype.Class})


class ClassRepr(AbstractClassRepr):
    def __init__(self, rtyper, classdef):
        AbstractClassRepr.__init__(self, rtyper, classdef)
        # This is the Repr for a reference to the class 'classdef' or
        # any subclass.  In the simple case, the lowleveltype is just
        # ootype.Class.  If we need to store class attributes, we use a
        # "meta" class where the attributes are defined, and the class
        # reference is a reference to an instance of this meta class.
        extra_access_sets = self.rtyper.class_pbc_attributes.get(
            classdef, {})
        has_class_attributes = bool(extra_access_sets)
        if self.classdef is not None:
            self.rbase = getclassrepr(self.rtyper, self.classdef.basedef)
            meta_base_type = self.rbase.lowleveltype
            baseclass_has_meta = meta_base_type != ootype.Class
        else:
            baseclass_has_meta = False

        if not has_class_attributes and not baseclass_has_meta:
            self.lowleveltype = ootype.Class   # simple case
        else:
            if self.classdef is None:
                raise TyperError("the root 'object' class should not have"
                                 " class attributes")
            if self.classdef.classdesc.pyobj in standardexceptions:
                raise TyperError("Standard exception class %r should not have"
                                 " class attributes" % (self.classdef.name,))
            if not baseclass_has_meta:
                meta_base_type = META
            self.lowleveltype = ootype.Instance(
                    self.classdef.name + "_meta", meta_base_type)

    def _setup_repr(self):
        pbcfields = {}
        if self.lowleveltype != ootype.Class:
            # class attributes
            llfields = []
            # attributes showing up in getattrs done on the class as a PBC
            extra_access_sets = self.rtyper.class_pbc_attributes.get(
                self.classdef, {})
            for access_set, (attr, counter) in extra_access_sets.items():
                r = self.rtyper.getrepr(access_set.s_value)
                mangled_name = pbcmangle('pbc%d' % counter, attr)
                pbcfields[access_set, attr] = mangled_name, r
                llfields.append((mangled_name, r.lowleveltype))
            
            self.rbase.setup()
            ootype.addFields(self.lowleveltype, dict(llfields))
        self.pbcfields = pbcfields
        self.meta_instance = None
 
    def get_meta_instance(self, cast_to_root_meta=True):
        if self.lowleveltype == ootype.Class:
            raise TyperError("no meta-instance for class %r" % 
                             (self.classdef,))
        if self.meta_instance is None:
            self.meta_instance = ootype.new(self.lowleveltype) 
            self.setup_meta_instance(self.meta_instance, self)
        
        meta_instance = self.meta_instance
        if cast_to_root_meta:
            meta_instance = ootype.ooupcast(META, meta_instance)
        return meta_instance

    def setup_meta_instance(self, meta_instance, rsubcls):
        if self.classdef is None:
            rinstance = getinstancerepr(self.rtyper, rsubcls.classdef)
            meta_instance.class_ = ootype.runtimeClass(rinstance.lowleveltype)
        else:
            # setup class attributes: for each attribute name at the level
            # of 'self', look up its value in the subclass rsubcls
            def assign(mangled_name, value):
                if isinstance(value, flowmodel.Constant) and isinstance(value.value, staticmethod):
                    value = flowmodel.Constant(value.value.__get__(42))   # staticmethod => bare function
                llvalue = r.convert_desc_or_const(value)
                setattr(meta_instance, mangled_name, llvalue)

            # extra PBC attributes
            for (access_set, attr), (mangled_name, r) in self.pbcfields.items():
                if rsubcls.classdef.classdesc not in access_set.descs:
                    continue   # only for the classes in the same pbc access set
                if r.lowleveltype is ootype.Void:
                    continue
                attrvalue = rsubcls.classdef.classdesc.read_attribute(attr, None)
                if attrvalue is not None:
                    assign(mangled_name, attrvalue)

            # then initialize the 'super' portion of the vtable
            self.rbase.setup_meta_instance(meta_instance, rsubcls)

    def getruntime(self, expected_type):
        if expected_type == ootype.Class:
            rinstance = getinstancerepr(self.rtyper, self.classdef)
            return ootype.runtimeClass(rinstance.lowleveltype)
        else:
            assert ootype.isSubclass(expected_type, META)
            meta = self.get_meta_instance(cast_to_root_meta=False)
            return ootype.ooupcast(expected_type, meta)

    def fromclasstype(self, vclass, llops):
        assert ootype.isSubclass(vclass.concretetype, META)
        if self.lowleveltype == ootype.Class:
            c_class_ = inputconst(ootype.Void, 'class_')
            return llops.genop('oogetfield', [vclass, c_class_],
                    resulttype=ootype.Class)
        else:
            assert ootype.isSubclass(self.lowleveltype, vclass.concretetype)
            return llops.genop('oodowncast', [vclass],
                    resulttype=self.lowleveltype)

    def getpbcfield(self, vcls, access_set, attr, llops):
        if (access_set, attr) not in self.pbcfields:
            raise TyperError("internal error: missing PBC field")
        mangled_name, r = self.pbcfields[access_set, attr]
        v_meta = self.fromclasstype(vcls, llops)
        cname = inputconst(ootype.Void, mangled_name)
        return llops.genop('oogetfield', [v_meta, cname], resulttype=r)

    def rtype_issubtype(self, hop):
        class_repr = get_type_repr(self.rtyper)
        vcls1, vcls2 = hop.inputargs(class_repr, class_repr)
        return hop.genop('subclassof', [vcls1, vcls2], resulttype=ootype.Bool)

def ll_issubclass(class1, class2):
    # helper for exceptiondata.py
    return ootype.subclassof(class1, class2)

# ____________________________________________________________

def mangle(name, config):
    # XXX temporary: for now it looks like a good idea to mangle names
    # systematically to trap bugs related to a confusion between mangled
    # and non-mangled names
    if config.translation.ootype.mangle:
        return 'o' + name
    else:
        not_allowed = ('meta', 'class_')
        assert name not in not_allowed, "%s is a reserved name" % name
        return name

def unmangle(mangled, config):
    if config.translation.ootype.mangle:
        assert mangled.startswith('o')
        return mangled[1:]
    else:
        return mangled

class InstanceRepr(AbstractInstanceRepr):
    def __init__(self, rtyper, classdef, gcflavor='ignored'):
        AbstractInstanceRepr.__init__(self, rtyper, classdef)

        self.baserepr = None
        if self.classdef is None:
            self.lowleveltype = OBJECT
        else:
            b = self.classdef.basedef
            if b is not None:
                self.baserepr = getinstancerepr(rtyper, b)
                b = self.baserepr.lowleveltype
            else:
                b = OBJECT

            if hasattr(classdef.classdesc.pyobj, '_rpython_hints'):
                hints = classdef.classdesc.pyobj._rpython_hints
            else:
                hints = {}
            hints = self._check_for_immutable_hints(hints)
            self.lowleveltype = ootype.Instance(classdef.name, b, {}, {}, _hints = hints)
        self.iprebuiltinstances = identity_dict()
        self.object_type = self.lowleveltype
        self.gcflavor = gcflavor

    def _setup_repr(self, llfields=None, hints=None):
        if hints:
            self.lowleveltype._hints.update(hints)

        if self.classdef is None:
            self.fields = {}
            self.allfields = {}
            self.allmethods = {}
            self.allclassattributes = {}
            self.classattributes = {}
            return

        if self.baserepr is not None:
            allfields = self.baserepr.allfields.copy()
            allmethods = self.baserepr.allmethods.copy()
            allclassattributes = self.baserepr.allclassattributes.copy()
        else:
            allfields = {}
            allmethods = {}
            allclassattributes = {}

        fields = {}
        nonmangledfields = []
        fielddefaults = {}

        if llfields:
            fields.update(dict(llfields))
        
        selfattrs = self.classdef.attrs

        for name, attrdef in selfattrs.iteritems():
            mangled = mangle(name, self.rtyper.getconfig())
            if not attrdef.readonly:
                repr = self.rtyper.getrepr(attrdef.s_value)
                allfields[mangled] = repr
                oot = repr.lowleveltype
                fields[mangled] = oot
                nonmangledfields.append(name)
                try:
                    value = self.classdef.classdesc.read_attribute(name)
                    fielddefaults[mangled] = repr.convert_desc_or_const(value)
                except AttributeError:
                    pass
            else:
                s_value = attrdef.s_value
                if isinstance(s_value, annmodel.SomePBC):
                    if len(s_value.descriptions) > 0 and s_value.getKind() == description.MethodDesc:
                        # attrdef is for a method
                        if mangled in allclassattributes:
                            raise TyperError("method overrides class attribute")
                        allmethods[mangled] = name, self.classdef.lookup_filter(s_value)
                        continue
                # class attribute
                if mangled in allmethods:
                    raise TyperError("class attribute overrides method")
                allclassattributes[mangled] = name, s_value

        special_methods = ["__init__", "__del__"]
        for meth_name in special_methods:
            if meth_name not in selfattrs and \
                    self.classdef.classdesc.find_source_for(meth_name) is not None:
                s_meth = self.classdef.classdesc.s_get_value(self.classdef,
                        meth_name)
                if isinstance(s_meth, annmodel.SomePBC):
                    mangled = mangle(meth_name, self.rtyper.getconfig())
                    allmethods[mangled] = meth_name, s_meth
                # else: it's the __init__ of a builtin exception

        ootype.addFields(self.lowleveltype, fields)

        self.rbase = getinstancerepr(self.rtyper, self.classdef.basedef)
        self.rbase.setup()

        for name, attrdef in selfattrs.iteritems():
            if not attrdef.readonly and self.is_quasi_immutable(name):
                name = mangle('mutable_' + name, self.rtyper.getconfig())
                ootype.addFields(self.lowleveltype, {name: OBJECT})

        classattributes = {}
        baseInstance = self.lowleveltype._superclass
        classrepr = getclassrepr(self.rtyper, self.classdef)

        # if this class has a corresponding metaclass, attach
        # a getmeta() method to get the corresponding meta_instance
        if classrepr.lowleveltype != ootype.Class:
            oovalue = classrepr.get_meta_instance()
            self.attach_class_attr_accessor('getmeta', oovalue)

                                        

        for classdef in self.classdef.getmro():
            for name, attrdef in classdef.attrs.iteritems():
                if not attrdef.readonly:
                    continue
                mangled = mangle(name, self.rtyper.getconfig())
                if mangled in allclassattributes:
                    selfdesc = self.classdef.classdesc
                    if name not in selfattrs:
                        # if the attr was already found in a parent class,
                        # we register it again only if it is overridden.
                        if selfdesc.find_source_for(name) is None:
                            continue
                        value = selfdesc.read_attribute(name)
                    else:
                        # otherwise, for new attrs, we look in all parent
                        # classes to see if it's defined in a parent but only
                        # actually first used in self.classdef.
                        value = selfdesc.read_attribute(name, None)

                    # a non-method class attribute
                    if not attrdef.s_value.is_constant():
                        classattributes[mangled] = attrdef.s_value, value

        self.fields = nonmangledfields
        self.allfields = allfields
        self.allmethods = allmethods
        self.allclassattributes = allclassattributes
        self.classattributes = classattributes
        # the following is done after the rest of the initialization because
        # convert_const can require 'self' to be fully initialized.

        # step 2: provide default values for fields
        for mangled, impl in fielddefaults.items():
            oot = fields[mangled]
            ootype.addFields(self.lowleveltype, {mangled: (oot, impl)},
                             with_default=True)

    def _setup_repr_final(self):
        if self.classdef is None:
            return
        AbstractInstanceRepr._setup_repr_final(self)
        
        # we attach methods here and not in _setup(), because we want
        # to be sure that all the reprs of the input arguments of all
        # our methods have been computed at this point
        methods = {}
        selfattrs = self.classdef.attrs
        for mangled, (name, s_value) in self.allmethods.iteritems():
            methdescs = s_value.descriptions
            origin = dict([(methdesc.originclassdef, methdesc) for
                           methdesc in methdescs])
            if self.classdef in origin:
                methdesc = origin[self.classdef]
            else:
                if name in selfattrs:
                    for superdef in self.classdef.getmro():
                        if superdef in origin:
                            # put in methods
                            methdesc = origin[superdef]
                            break
                    else:
                        # abstract method
                        methdesc = None
                else:
                    continue
            # get method implementation
            from pypy.rpython.ootypesystem.rpbc import MethodImplementations
            methimpls = MethodImplementations.get(self.rtyper, s_value)
            m_impls = methimpls.get_impl(mangled, methdesc,
                    is_finalizer=name == "__del__")
            methods.update(m_impls)
        ootype.addMethods(self.lowleveltype, methods)
        
        
        # step 3: provide accessor methods for class attributes that
        # are really overridden in subclasses. Must be done here
        # instead of _setup_repr to avoid recursion problems if class
        # attributes are Instances of self.lowleveltype.
        
        for mangled, (s_value, value) in self.classattributes.items():
            r = self.rtyper.getrepr(s_value)
            if value is None:
                self.attach_abstract_class_attr_accessor(mangled,
                                                         r.lowleveltype)
            else:
                oovalue = r.convert_desc_or_const(value)
                self.attach_class_attr_accessor(mangled, oovalue)

        # step 4: do the same with instance fields whose default
        # values are overridden in subclasses. Not sure it's the best
        # way to do it.
        overridden_defaults = {}

        if self.classdef is not None:
            for name, constant in self.classdef.classdesc.classdict.iteritems():
                # look for the attrdef in the superclasses
                classdef = self.classdef.basedef
                attrdef = None
                while classdef is not None:
                    if name in classdef.attrs:
                        attrdef = classdef.attrs[name]
                        break
                    classdef = classdef.basedef
                if attrdef is not None and not attrdef.readonly:
                    # it means that the default value for this field
                    # is overridden in this subclass. Record we know
                    # about it
                    repr = self.rtyper.getrepr(attrdef.s_value)
                    oot = repr.lowleveltype
                    mangled = mangle(name, self.rtyper.getconfig())
                    value = self.classdef.classdesc.read_attribute(name)
                    default = repr.convert_desc_or_const(value)
                    overridden_defaults[mangled] = oot, default

        ootype.overrideDefaultForFields(self.lowleveltype, overridden_defaults)

    def _get_field(self, attr):
        mangled = mangle(attr, self.rtyper.getconfig())
        return mangled, self.allfields[mangled]

    def attach_abstract_class_attr_accessor(self, mangled, attrtype):
        M = ootype.Meth([], attrtype)
        m = ootype.meth(M, _name=mangled, abstract=True)
        ootype.addMethods(self.lowleveltype, {mangled: m})

    def attach_class_attr_accessor(self, mangled, oovalue):
        def ll_getclassattr(self):
            return oovalue

        M = ootype.Meth([], ootype.typeOf(oovalue))
        ll_getclassattr = func_with_new_name(ll_getclassattr,
                                             'll_get_' + mangled)
        graph = self.rtyper.annotate_helper(ll_getclassattr, [self.lowleveltype])
        m = ootype.meth(M, _name=mangled, _callable=ll_getclassattr,
                        graph=graph)
        ootype.addMethods(self.lowleveltype, {mangled: m})

    def rtype_getattr(self, hop):
        if hop.s_result.is_constant():
            return hop.inputconst(hop.r_result, hop.s_result.const)
        v_inst, _ = hop.inputargs(self, ootype.Void)
        s_inst = hop.args_s[0]
        attr = hop.args_s[1].const
        mangled = mangle(attr, self.rtyper.getconfig())
        if mangled in self.allfields:
            # regular instance attributes
            return self.getfield(v_inst, attr, hop.llops,
                                 flags=hop.args_s[0].flags)
        elif mangled in self.allmethods:
            # special case for methods: represented as their 'self' only
            # (see MethodsPBCRepr)
            return hop.r_result.get_method_from_instance(self, v_inst,
                                                         hop.llops)
        elif mangled in self.allclassattributes:
            # class attributes
            if hop.s_result.is_constant():
                return hop.inputconst(hop.r_result, hop.s_result.const)
            else:
                cname = hop.inputconst(ootype.Void, mangled)
                return hop.genop("oosend", [cname, v_inst],
                                 resulttype = hop.r_result.lowleveltype)
        elif attr == '__class__':
            expected_type = hop.r_result.lowleveltype
            if expected_type is ootype.Void:
                # special case for when the result of '.__class__' is constant
                [desc] = hop.s_result.descriptions
                return hop.inputconst(ootype.Void, desc.pyobj)
            elif expected_type == ootype.Class:
                return hop.genop('classof', [v_inst],
                                 resulttype = ootype.Class)
            else:
                assert expected_type == META
                _, meth = v_inst.concretetype._lookup('getmeta')
                assert meth
                c_getmeta = hop.inputconst(ootype.Void, 'getmeta')
                return hop.genop('oosend', [c_getmeta, v_inst],
                                 resulttype = META)
        else:
            raise TyperError("no attribute %r on %r" % (attr, self))

    def rtype_setattr(self, hop):
        attr = hop.args_s[1].const
        mangled = mangle(attr, self.rtyper.getconfig())
        self.lowleveltype._check_field(mangled)
        r_value = self.allfields[mangled]
        v_inst, _, v_newval = hop.inputargs(self, ootype.Void, r_value)
        self.setfield(v_inst, attr, v_newval, hop.llops,
                      flags=hop.args_s[0].flags)

    def getfield(self, v_inst, attr, llops, flags={}):
        mangled = mangle(attr, self.rtyper.getconfig())
        v_attr = inputconst(ootype.Void, mangled)
        r_value = self.allfields[mangled]
        self.lowleveltype._check_field(mangled)
        self.hook_access_field(v_inst, v_attr, llops, flags)
        return llops.genop('oogetfield', [v_inst, v_attr],
                           resulttype = r_value)

    def setfield(self, vinst, attr, vvalue, llops, flags={}):
        mangled_name = mangle(attr, self.rtyper.getconfig())
        cname = inputconst(ootype.Void, mangled_name)
        self.hook_access_field(vinst, cname, llops, flags)
        self.hook_setfield(vinst, attr, llops)
        llops.genop('oosetfield', [vinst, cname, vvalue])

    def rtype_is_true(self, hop):
        vinst, = hop.inputargs(self)
        return hop.genop('oononnull', [vinst], resulttype=ootype.Bool)

    def ll_str(self, instance):
        return ootype.oostring(instance, -1)

    def rtype_type(self, hop):
        if hop.s_result.is_constant():
            return hop.inputconst(hop.r_result, hop.s_result.const)
        vinst, = hop.inputargs(self)
        if hop.args_s[0].can_be_none():
            return hop.gendirectcall(ll_inst_type, vinst)
        else:
            return hop.genop('classof', [vinst], resulttype=ootype.Class)

    def null_instance(self):
        return ootype.null(self.lowleveltype)

    def upcast(self, result):
        return ootype.ooupcast(self.lowleveltype, result)

    def create_instance(self):
        return ootype.new(self.object_type)

    def new_instance(self, llops, classcallhop=None):
        """Build a new instance, without calling __init__."""
        classrepr = getclassrepr(self.rtyper, self.classdef) 
        v_instance =  llops.genop("new",
            [inputconst(ootype.Void, self.lowleveltype)], self.lowleveltype)
        return v_instance
        
    def initialize_prebuilt_data(self, value, classdef, result):
        # then add instance attributes from this level
        classrepr = getclassrepr(self.rtyper, self.classdef)
        for mangled, (oot, default) in self.lowleveltype._allfields().items():
            if oot is ootype.Void:
                llattrvalue = None
            elif mangled == 'meta':
                llattrvalue = classrepr.get_meta_instance()
            else:
                name = unmangle(mangled, self.rtyper.getconfig())
                try:
                    attrvalue = getattr(value, name)
                except AttributeError:
                    attrvalue = self.classdef.classdesc.read_attribute(name, None)
                    if attrvalue is None:
                        warning("prebuilt instance %r has no attribute %r" % (
                                value, name))
                        continue
                    llattrvalue = self.allfields[mangled].convert_desc_or_const(attrvalue)
                else:
                    llattrvalue = self.allfields[mangled].convert_const(attrvalue)
            setattr(result, mangled, llattrvalue)

    def initialize_prebuilt_hash(self, value, result):
        pass


class __extend__(pairtype(InstanceRepr, InstanceRepr)):
    def convert_from_to((r_ins1, r_ins2), v, llops):
        # which is a subclass of which?
        if r_ins1.classdef is None or r_ins2.classdef is None:
            basedef = None
        else:
            basedef = r_ins1.classdef.commonbase(r_ins2.classdef)
        if basedef == r_ins2.classdef:
            # r_ins1 is an instance of the subclass: converting to parent
            v = llops.genop('ooupcast', [v],
                            resulttype = r_ins2.lowleveltype)
            return v
        elif basedef == r_ins1.classdef:
            # r_ins2 is an instance of the subclass: potentially unsafe
            # casting, but we do it anyway (e.g. the annotator produces
            # such casts after a successful isinstance() check)
            v = llops.genop('oodowncast', [v],
                            resulttype = r_ins2.lowleveltype)
            return v
        else:
            return NotImplemented

    def rtype_is_((r_ins1, r_ins2), hop):
        # NB. this version performs no cast to the common base class
        vlist = hop.inputargs(r_ins1, r_ins2)
        return hop.genop('oois', vlist, resulttype=ootype.Bool)

    rtype_eq = rtype_is_

    def rtype_ne(rpair, hop):
        v = rpair.rtype_eq(hop)
        return hop.genop("bool_not", [v], resulttype=ootype.Bool)

def ll_inst_type(obj):
    if obj:
        return ootype.classof(obj)
    else:
        # type(None) -> NULL  (for now)
        return ootype.nullruntimeclass
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for ProjectModifiedEvent.java.
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.