ceph/src/rapidjson/thirdparty/gtest/googlemock/scripts/gmock_doctor.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2008, Google Inc.
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  30 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31
  32 """Converts compiler's errors in code using Google Mock to plain English."""
  33
  34 __author__ = 'wan@google.com (Zhanyong Wan)'
  35
  36 import re
  37 import sys
  38
  39 _VERSION = '1.0.3'
  40
  41 _EMAIL = 'googlemock@googlegroups.com'
  42
  43 _COMMON_GMOCK_SYMBOLS = [
  44     # Matchers
  45     '_',
  46     'A',
  47     'AddressSatisfies',
  48     'AllOf',
  49     'An',
  50     'AnyOf',
  51     'ContainerEq',
  52     'Contains',
  53     'ContainsRegex',
  54     'DoubleEq',
  55     'ElementsAre',
  56     'ElementsAreArray',
  57     'EndsWith',
  58     'Eq',
  59     'Field',
  60     'FloatEq',
  61     'Ge',
  62     'Gt',
  63     'HasSubstr',
  64     'IsInitializedProto',
  65     'Le',
  66     'Lt',
  67     'MatcherCast',
  68     'Matches',
  69     'MatchesRegex',
  70     'NanSensitiveDoubleEq',
  71     'NanSensitiveFloatEq',
  72     'Ne',
  73     'Not',
  74     'NotNull',
  75     'Pointee',
  76     'Property',
  77     'Ref',
  78     'ResultOf',
  79     'SafeMatcherCast',
  80     'StartsWith',
  81     'StrCaseEq',
  82     'StrCaseNe',
  83     'StrEq',
  84     'StrNe',
  85     'Truly',
  86     'TypedEq',
  87     'Value',
  88
  89     # Actions
  90     'Assign',
  91     'ByRef',
  92     'DeleteArg',
  93     'DoAll',
  94     'DoDefault',
  95     'IgnoreResult',
  96     'Invoke',
  97     'InvokeArgument',
  98     'InvokeWithoutArgs',
  99     'Return',
 100     'ReturnNew',
 101     'ReturnNull',
 102     'ReturnRef',
 103     'SaveArg',
 104     'SetArgReferee',
 105     'SetArgPointee',
 106     'SetArgumentPointee',
 107     'SetArrayArgument',
 108     'SetErrnoAndReturn',
 109     'Throw',
 110     'WithArg',
 111     'WithArgs',
 112     'WithoutArgs',
 113
 114     # Cardinalities
 115     'AnyNumber',
 116     'AtLeast',
 117     'AtMost',
 118     'Between',
 119     'Exactly',
 120
 121     # Sequences
 122     'InSequence',
 123     'Sequence',
 124
 125     # Misc
 126     'DefaultValue',
 127     'Mock',
 128     ]
 129
 130 # Regex for matching source file path and line number in the compiler's errors.
 131 _GCC_FILE_LINE_RE = r'(?P<file>.*):(?P<line>\d+):(\d+:)?\s+'
 132 _CLANG_FILE_LINE_RE = r'(?P<file>.*):(?P<line>\d+):(?P<column>\d+):\s+'
 133 _CLANG_NON_GMOCK_FILE_LINE_RE = (
 134     r'(?P<file>.*[/\\^](?!gmock-)[^/\\]+):(?P<line>\d+):(?P<column>\d+):\s+')
 135
 136
 137 def _FindAllMatches(regex, s):
 138   """Generates all matches of regex in string s."""
 139
 140   r = re.compile(regex)
 141   return r.finditer(s)
 142
 143
 144 def _GenericDiagnoser(short_name, long_name, diagnoses, msg):
 145   """Diagnoses the given disease by pattern matching.
 146
 147   Can provide different diagnoses for different patterns.
 148
 149   Args:
 150     short_name: Short name of the disease.
 151     long_name:  Long name of the disease.
 152     diagnoses:  A list of pairs (regex, pattern for formatting the diagnosis
 153                 for matching regex).
 154     msg:        Compiler's error messages.
 155   Yields:
 156     Tuples of the form
 157       (short name of disease, long name of disease, diagnosis).
 158   """
 159   for regex, diagnosis in diagnoses:
 160     if re.search(regex, msg):
 161       diagnosis = '%(file)s:%(line)s:' + diagnosis
 162       for m in _FindAllMatches(regex, msg):
 163         yield (short_name, long_name, diagnosis % m.groupdict())
 164
 165
 166 def _NeedToReturnReferenceDiagnoser(msg):
 167   """Diagnoses the NRR disease, given the error messages by the compiler."""
 168
 169   gcc_regex = (r'In member function \'testing::internal::ReturnAction<R>.*\n'
 170                + _GCC_FILE_LINE_RE + r'instantiated from here\n'
 171                r'.*gmock-actions\.h.*error: creating array with negative size')
 172   clang_regex = (r'error:.*array.*negative.*\r?\n'
 173                  r'(.*\n)*?' +
 174                  _CLANG_NON_GMOCK_FILE_LINE_RE +
 175                  r'note: in instantiation of function template specialization '
 176                  r'\'testing::internal::ReturnAction<(?P<type>.*)>'
 177                  r'::operator Action<.*>\' requested here')
 178   clang11_re = (r'use_ReturnRef_instead_of_Return_to_return_a_reference.*'
 179                 r'(.*\n)*?' + _CLANG_NON_GMOCK_FILE_LINE_RE)
 180
 181   diagnosis = """
 182 You are using a Return() action in a function that returns a reference to
 183 %(type)s.  Please use ReturnRef() instead."""
 184   return _GenericDiagnoser('NRR', 'Need to Return Reference',
 185                            [(clang_regex, diagnosis),
 186                             (clang11_re, diagnosis % {'type': 'a type'}),
 187                             (gcc_regex, diagnosis % {'type': 'a type'})],
 188                            msg)
 189
 190
 191 def _NeedToReturnSomethingDiagnoser(msg):
 192   """Diagnoses the NRS disease, given the error messages by the compiler."""
 193
 194   gcc_regex = (_GCC_FILE_LINE_RE + r'(instantiated from here\n.'
 195                r'*gmock.*actions\.h.*error: void value not ignored)'
 196                r'|(error: control reaches end of non-void function)')
 197   clang_regex1 = (_CLANG_FILE_LINE_RE +
 198                   r'error: cannot initialize return object '
 199                   r'of type \'Result\' \(aka \'(?P<return_type>.*)\'\) '
 200                   r'with an rvalue of type \'void\'')
 201   clang_regex2 = (_CLANG_FILE_LINE_RE +
 202                   r'error: cannot initialize return object '
 203                   r'of type \'(?P<return_type>.*)\' '
 204                   r'with an rvalue of type \'void\'')
 205   diagnosis = """
 206 You are using an action that returns void, but it needs to return
 207 %(return_type)s.  Please tell it *what* to return.  Perhaps you can use
 208 the pattern DoAll(some_action, Return(some_value))?"""
 209   return _GenericDiagnoser(
 210       'NRS',
 211       'Need to Return Something',
 212       [(gcc_regex, diagnosis % {'return_type': '*something*'}),
 213        (clang_regex1, diagnosis),
 214        (clang_regex2, diagnosis)],
 215       msg)
 216
 217
 218 def _NeedToReturnNothingDiagnoser(msg):
 219   """Diagnoses the NRN disease, given the error messages by the compiler."""
 220
 221   gcc_regex = (_GCC_FILE_LINE_RE + r'instantiated from here\n'
 222                r'.*gmock-actions\.h.*error: instantiation of '
 223                r'\'testing::internal::ReturnAction<R>::Impl<F>::value_\' '
 224                r'as type \'void\'')
 225   clang_regex1 = (r'error: field has incomplete type '
 226                   r'\'Result\' \(aka \'void\'\)(\r)?\n'
 227                   r'(.*\n)*?' +
 228                   _CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
 229                   r'of function template specialization '
 230                   r'\'testing::internal::ReturnAction<(?P<return_type>.*)>'
 231                   r'::operator Action<void \(.*\)>\' requested here')
 232   clang_regex2 = (r'error: field has incomplete type '
 233                   r'\'Result\' \(aka \'void\'\)(\r)?\n'
 234                   r'(.*\n)*?' +
 235                   _CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
 236                   r'of function template specialization '
 237                   r'\'testing::internal::DoBothAction<.*>'
 238                   r'::operator Action<(?P<return_type>.*) \(.*\)>\' '
 239                   r'requested here')
 240   diagnosis = """
 241 You are using an action that returns %(return_type)s, but it needs to return
 242 void.  Please use a void-returning action instead.
 243
 244 All actions but the last in DoAll(...) must return void.  Perhaps you need
 245 to re-arrange the order of actions in a DoAll(), if you are using one?"""
 246   return _GenericDiagnoser(
 247       'NRN',
 248       'Need to Return Nothing',
 249       [(gcc_regex, diagnosis % {'return_type': '*something*'}),
 250        (clang_regex1, diagnosis),
 251        (clang_regex2, diagnosis)],
 252       msg)
 253
 254
 255 def _IncompleteByReferenceArgumentDiagnoser(msg):
 256   """Diagnoses the IBRA disease, given the error messages by the compiler."""
 257
 258   gcc_regex = (_GCC_FILE_LINE_RE + r'instantiated from here\n'
 259                r'.*gtest-printers\.h.*error: invalid application of '
 260                r'\'sizeof\' to incomplete type \'(?P<type>.*)\'')
 261
 262   clang_regex = (r'.*gtest-printers\.h.*error: invalid application of '
 263                  r'\'sizeof\' to an incomplete type '
 264                  r'\'(?P<type>.*)( const)?\'\r?\n'
 265                  r'(.*\n)*?' +
 266                  _CLANG_NON_GMOCK_FILE_LINE_RE +
 267                  r'note: in instantiation of member function '
 268                  r'\'testing::internal2::TypeWithoutFormatter<.*>::'
 269                  r'PrintValue\' requested here')
 270   diagnosis = """
 271 In order to mock this function, Google Mock needs to see the definition
 272 of type "%(type)s" - declaration alone is not enough.  Either #include
 273 the header that defines it, or change the argument to be passed
 274 by pointer."""
 275
 276   return _GenericDiagnoser('IBRA', 'Incomplete By-Reference Argument Type',
 277                            [(gcc_regex, diagnosis),
 278                             (clang_regex, diagnosis)],
 279                            msg)
 280
 281
 282 def _OverloadedFunctionMatcherDiagnoser(msg):
 283   """Diagnoses the OFM disease, given the error messages by the compiler."""
 284
 285   gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for '
 286                r'call to \'Truly\(<unresolved overloaded function type>\)')
 287   clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching function for '
 288                  r'call to \'Truly')
 289   diagnosis = """
 290 The argument you gave to Truly() is an overloaded function.  Please tell
 291 your compiler which overloaded version you want to use.
 292
 293 For example, if you want to use the version whose signature is
 294   bool Foo(int n);
 295 you should write
 296   Truly(static_cast<bool (*)(int n)>(Foo))"""
 297   return _GenericDiagnoser('OFM', 'Overloaded Function Matcher',
 298                            [(gcc_regex, diagnosis),
 299                             (clang_regex, diagnosis)],
 300                            msg)
 301
 302
 303 def _OverloadedFunctionActionDiagnoser(msg):
 304   """Diagnoses the OFA disease, given the error messages by the compiler."""
 305
 306   gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for call to '
 307                r'\'Invoke\(<unresolved overloaded function type>')
 308   clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching '
 309                  r'function for call to \'Invoke\'\r?\n'
 310                  r'(.*\n)*?'
 311                  r'.*\bgmock-generated-actions\.h:\d+:\d+:\s+'
 312                  r'note: candidate template ignored:\s+'
 313                  r'couldn\'t infer template argument \'FunctionImpl\'')
 314   diagnosis = """
 315 Function you are passing to Invoke is overloaded.  Please tell your compiler
 316 which overloaded version you want to use.
 317
 318 For example, if you want to use the version whose signature is
 319   bool MyFunction(int n, double x);
 320 you should write something like
 321   Invoke(static_cast<bool (*)(int n, double x)>(MyFunction))"""
 322   return _GenericDiagnoser('OFA', 'Overloaded Function Action',
 323                            [(gcc_regex, diagnosis),
 324                             (clang_regex, diagnosis)],
 325                            msg)
 326
 327
 328 def _OverloadedMethodActionDiagnoser(msg):
 329   """Diagnoses the OMA disease, given the error messages by the compiler."""
 330
 331   gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for '
 332                r'call to \'Invoke\(.+, <unresolved overloaded function '
 333                r'type>\)')
 334   clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching function '
 335                  r'for call to \'Invoke\'\r?\n'
 336                  r'(.*\n)*?'
 337                  r'.*\bgmock-generated-actions\.h:\d+:\d+: '
 338                  r'note: candidate function template not viable: '
 339                  r'requires .*, but 2 (arguments )?were provided')
 340   diagnosis = """
 341 The second argument you gave to Invoke() is an overloaded method.  Please
 342 tell your compiler which overloaded version you want to use.
 343
 344 For example, if you want to use the version whose signature is
 345   class Foo {
 346     ...
 347     bool Bar(int n, double x);
 348   };
 349 you should write something like
 350   Invoke(foo, static_cast<bool (Foo::*)(int n, double x)>(&Foo::Bar))"""
 351   return _GenericDiagnoser('OMA', 'Overloaded Method Action',
 352                            [(gcc_regex, diagnosis),
 353                             (clang_regex, diagnosis)],
 354                            msg)
 355
 356
 357 def _MockObjectPointerDiagnoser(msg):
 358   """Diagnoses the MOP disease, given the error messages by the compiler."""
 359
 360   gcc_regex = (_GCC_FILE_LINE_RE + r'error: request for member '
 361                r'\'gmock_(?P<method>.+)\' in \'(?P<mock_object>.+)\', '
 362                r'which is of non-class type \'(.*::)*(?P<class_name>.+)\*\'')
 363   clang_regex = (_CLANG_FILE_LINE_RE + r'error: member reference type '
 364                  r'\'(?P<class_name>.*?) *\' is a pointer; '
 365                  r'(did you mean|maybe you meant) to use \'->\'\?')
 366   diagnosis = """
 367 The first argument to ON_CALL() and EXPECT_CALL() must be a mock *object*,
 368 not a *pointer* to it.  Please write '*(%(mock_object)s)' instead of
 369 '%(mock_object)s' as your first argument.
 370
 371 For example, given the mock class:
 372
 373   class %(class_name)s : public ... {
 374     ...
 375     MOCK_METHOD0(%(method)s, ...);
 376   };
 377
 378 and the following mock instance:
 379
 380   %(class_name)s* mock_ptr = ...
 381
 382 you should use the EXPECT_CALL like this:
 383
 384   EXPECT_CALL(*mock_ptr, %(method)s(...));"""
 385
 386   return _GenericDiagnoser(
 387       'MOP',
 388       'Mock Object Pointer',
 389       [(gcc_regex, diagnosis),
 390        (clang_regex, diagnosis % {'mock_object': 'mock_object',
 391                                   'method': 'method',
 392                                   'class_name': '%(class_name)s'})],
 393        msg)
 394
 395
 396 def _NeedToUseSymbolDiagnoser(msg):
 397   """Diagnoses the NUS disease, given the error messages by the compiler."""
 398
 399   gcc_regex = (_GCC_FILE_LINE_RE + r'error: \'(?P<symbol>.+)\' '
 400                r'(was not declared in this scope|has not been declared)')
 401   clang_regex = (_CLANG_FILE_LINE_RE +
 402                  r'error: (use of undeclared identifier|unknown type name|'
 403                  r'no template named) \'(?P<symbol>[^\']+)\'')
 404   diagnosis = """
 405 '%(symbol)s' is defined by Google Mock in the testing namespace.
 406 Did you forget to write
 407   using testing::%(symbol)s;
 408 ?"""
 409   for m in (list(_FindAllMatches(gcc_regex, msg)) +
 410             list(_FindAllMatches(clang_regex, msg))):
 411     symbol = m.groupdict()['symbol']
 412     if symbol in _COMMON_GMOCK_SYMBOLS:
 413       yield ('NUS', 'Need to Use Symbol', diagnosis % m.groupdict())
 414
 415
 416 def _NeedToUseReturnNullDiagnoser(msg):
 417   """Diagnoses the NRNULL disease, given the error messages by the compiler."""
 418
 419   gcc_regex = ('instantiated from \'testing::internal::ReturnAction<R>'
 420                '::operator testing::Action<Func>\(\) const.*\n' +
 421                _GCC_FILE_LINE_RE + r'instantiated from here\n'
 422                r'.*error: no matching function for call to \'ImplicitCast_\('
 423                r'(:?long )?int&\)')
 424   clang_regex = (r'\bgmock-actions.h:.* error: no matching function for '
 425                  r'call to \'ImplicitCast_\'\r?\n'
 426                  r'(.*\n)*?' +
 427                  _CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
 428                  r'of function template specialization '
 429                  r'\'testing::internal::ReturnAction<(int|long)>::operator '
 430                  r'Action<(?P<type>.*)\(\)>\' requested here')
 431   diagnosis = """
 432 You are probably calling Return(NULL) and the compiler isn't sure how to turn
 433 NULL into %(type)s. Use ReturnNull() instead.
 434 Note: the line number may be off; please fix all instances of Return(NULL)."""
 435   return _GenericDiagnoser(
 436       'NRNULL', 'Need to use ReturnNull',
 437       [(clang_regex, diagnosis),
 438        (gcc_regex, diagnosis % {'type': 'the right type'})],
 439       msg)
 440
 441
 442 def _TypeInTemplatedBaseDiagnoser(msg):
 443   """Diagnoses the TTB disease, given the error messages by the compiler."""
 444
 445   # This version works when the type is used as the mock function's return
 446   # type.
 447   gcc_4_3_1_regex_type_in_retval = (
 448       r'In member function \'int .*\n' + _GCC_FILE_LINE_RE +
 449       r'error: a function call cannot appear in a constant-expression')
 450   gcc_4_4_0_regex_type_in_retval = (
 451       r'error: a function call cannot appear in a constant-expression'
 452       + _GCC_FILE_LINE_RE + r'error: template argument 1 is invalid\n')
 453   # This version works when the type is used as the mock function's sole
 454   # parameter type.
 455   gcc_regex_type_of_sole_param = (
 456       _GCC_FILE_LINE_RE +
 457       r'error: \'(?P<type>.+)\' was not declared in this scope\n'
 458       r'.*error: template argument 1 is invalid\n')
 459   # This version works when the type is used as a parameter of a mock
 460   # function that has multiple parameters.
 461   gcc_regex_type_of_a_param = (
 462       r'error: expected `;\' before \'::\' token\n'
 463       + _GCC_FILE_LINE_RE +
 464       r'error: \'(?P<type>.+)\' was not declared in this scope\n'
 465       r'.*error: template argument 1 is invalid\n'
 466       r'.*error: \'.+\' was not declared in this scope')
 467   clang_regex_type_of_retval_or_sole_param = (
 468       _CLANG_FILE_LINE_RE +
 469       r'error: use of undeclared identifier \'(?P<type>.*)\'\n'
 470       r'(.*\n)*?'
 471       r'(?P=file):(?P=line):\d+: error: '
 472       r'non-friend class member \'Result\' cannot have a qualified name'
 473       )
 474   clang_regex_type_of_a_param = (
 475       _CLANG_FILE_LINE_RE +
 476       r'error: C\+\+ requires a type specifier for all declarations\n'
 477       r'(.*\n)*?'
 478       r'(?P=file):(?P=line):(?P=column): error: '
 479       r'C\+\+ requires a type specifier for all declarations'
 480       )
 481   clang_regex_unknown_type = (
 482       _CLANG_FILE_LINE_RE +
 483       r'error: unknown type name \'(?P<type>[^\']+)\''
 484       )
 485
 486   diagnosis = """
 487 In a mock class template, types or typedefs defined in the base class
 488 template are *not* automatically visible.  This is how C++ works.  Before
 489 you can use a type or typedef named %(type)s defined in base class Base<T>, you
 490 need to make it visible.  One way to do it is:
 491
 492   typedef typename Base<T>::%(type)s %(type)s;"""
 493
 494   for diag in _GenericDiagnoser(
 495       'TTB', 'Type in Template Base',
 496       [(gcc_4_3_1_regex_type_in_retval, diagnosis % {'type': 'Foo'}),
 497        (gcc_4_4_0_regex_type_in_retval, diagnosis % {'type': 'Foo'}),
 498        (gcc_regex_type_of_sole_param, diagnosis),
 499        (gcc_regex_type_of_a_param, diagnosis),
 500        (clang_regex_type_of_retval_or_sole_param, diagnosis),
 501        (clang_regex_type_of_a_param, diagnosis % {'type': 'Foo'})],
 502       msg):
 503     yield diag
 504   # Avoid overlap with the NUS pattern.
 505   for m in _FindAllMatches(clang_regex_unknown_type, msg):
 506     type_ = m.groupdict()['type']
 507     if type_ not in _COMMON_GMOCK_SYMBOLS:
 508       yield ('TTB', 'Type in Template Base', diagnosis % m.groupdict())
 509
 510
 511 def _WrongMockMethodMacroDiagnoser(msg):
 512   """Diagnoses the WMM disease, given the error messages by the compiler."""
 513
 514   gcc_regex = (_GCC_FILE_LINE_RE +
 515                r'.*this_method_does_not_take_(?P<wrong_args>\d+)_argument.*\n'
 516                r'.*\n'
 517                r'.*candidates are.*FunctionMocker<[^>]+A(?P<args>\d+)\)>')
 518   clang_regex = (_CLANG_NON_GMOCK_FILE_LINE_RE +
 519                  r'error:.*array.*negative.*r?\n'
 520                  r'(.*\n)*?'
 521                  r'(?P=file):(?P=line):(?P=column): error: too few arguments '
 522                  r'to function call, expected (?P<args>\d+), '
 523                  r'have (?P<wrong_args>\d+)')
 524   clang11_re = (_CLANG_NON_GMOCK_FILE_LINE_RE +
 525                 r'.*this_method_does_not_take_'
 526                 r'(?P<wrong_args>\d+)_argument.*')
 527   diagnosis = """
 528 You are using MOCK_METHOD%(wrong_args)s to define a mock method that has
 529 %(args)s arguments. Use MOCK_METHOD%(args)s (or MOCK_CONST_METHOD%(args)s,
 530 MOCK_METHOD%(args)s_T, MOCK_CONST_METHOD%(args)s_T as appropriate) instead."""
 531   return _GenericDiagnoser('WMM', 'Wrong MOCK_METHODn Macro',
 532                            [(gcc_regex, diagnosis),
 533                             (clang11_re, diagnosis % {'wrong_args': 'm',
 534                                                       'args': 'n'}),
 535                             (clang_regex, diagnosis)],
 536                            msg)
 537
 538
 539 def _WrongParenPositionDiagnoser(msg):
 540   """Diagnoses the WPP disease, given the error messages by the compiler."""
 541
 542   gcc_regex = (_GCC_FILE_LINE_RE +
 543                r'error:.*testing::internal::MockSpec<.* has no member named \''
 544                r'(?P<method>\w+)\'')
 545   clang_regex = (_CLANG_NON_GMOCK_FILE_LINE_RE +
 546                  r'error: no member named \'(?P<method>\w+)\' in '
 547                  r'\'testing::internal::MockSpec<.*>\'')
 548   diagnosis = """
 549 The closing parenthesis of ON_CALL or EXPECT_CALL should be *before*
 550 ".%(method)s".  For example, you should write:
 551   EXPECT_CALL(my_mock, Foo(_)).%(method)s(...);
 552 instead of:
 553   EXPECT_CALL(my_mock, Foo(_).%(method)s(...));"""
 554   return _GenericDiagnoser('WPP', 'Wrong Parenthesis Position',
 555                            [(gcc_regex, diagnosis),
 556                             (clang_regex, diagnosis)],
 557                            msg)
 558
 559
 560 _DIAGNOSERS = [
 561     _IncompleteByReferenceArgumentDiagnoser,
 562     _MockObjectPointerDiagnoser,
 563     _NeedToReturnNothingDiagnoser,
 564     _NeedToReturnReferenceDiagnoser,
 565     _NeedToReturnSomethingDiagnoser,
 566     _NeedToUseReturnNullDiagnoser,
 567     _NeedToUseSymbolDiagnoser,
 568     _OverloadedFunctionActionDiagnoser,
 569     _OverloadedFunctionMatcherDiagnoser,
 570     _OverloadedMethodActionDiagnoser,
 571     _TypeInTemplatedBaseDiagnoser,
 572     _WrongMockMethodMacroDiagnoser,
 573     _WrongParenPositionDiagnoser,
 574     ]
 575
 576
 577 def Diagnose(msg):
 578   """Generates all possible diagnoses given the compiler error message."""
 579
 580   msg = re.sub(r'\x1b\[[^m]*m', '', msg)  # Strips all color formatting.
 581   # Assuming the string is using the UTF-8 encoding, replaces the left and
 582   # the right single quote characters with apostrophes.
 583   msg = re.sub(r'(\xe2\x80\x98|\xe2\x80\x99)', "'", msg)
 584
 585   diagnoses = []
 586   for diagnoser in _DIAGNOSERS:
 587     for diag in diagnoser(msg):
 588       diagnosis = '[%s - %s]\n%s' % diag
 589       if not diagnosis in diagnoses:
 590         diagnoses.append(diagnosis)
 591   return diagnoses
 592
 593
 594 def main():
 595   print ('Google Mock Doctor v%s - '
 596          'diagnoses problems in code using Google Mock.' % _VERSION)
 597
 598   if sys.stdin.isatty():
 599     print ('Please copy and paste the compiler errors here.  Press c-D when '
 600            'you are done:')
 601   else:
 602     print ('Waiting for compiler errors on stdin . . .')
 603
 604   msg = sys.stdin.read().strip()
 605   diagnoses = Diagnose(msg)
 606   count = len(diagnoses)
 607   if not count:
 608     print ("""
 609 Your compiler complained:
 610 8<------------------------------------------------------------
 611 %s
 612 ------------------------------------------------------------>8
 613
 614 Uh-oh, I'm not smart enough to figure out what the problem is. :-(
 615 However...
 616 If you send your source code and the compiler's error messages to
 617 %s, you can be helped and I can get smarter --
 618 win-win for us!""" % (msg, _EMAIL))
 619   else:
 620     print ('------------------------------------------------------------')
 621     print ('Your code appears to have the following',)
 622     if count > 1:
 623       print ('%s diseases:' % (count,))
 624     else:
 625       print ('disease:')
 626     i = 0
 627     for d in diagnoses:
 628       i += 1
 629       if count > 1:
 630         print ('\n#%s:' % (i,))
 631       print (d)
 632     print ("""
 633 How did I do?  If you think I'm wrong or unhelpful, please send your
 634 source code and the compiler's error messages to %s.
 635 Then you can be helped and I can get smarter -- I promise I won't be upset!""" %
 636            _EMAIL)
 637
 638
 639 if __name__ == '__main__':
 640   main()