601 lines
22 KiB
Python
Executable File
601 lines
22 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright 2008, Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""Converts compiler's errors in code using Google Mock to plain English."""
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__author__ = 'wan@google.com (Zhanyong Wan)'
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import re
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import sys
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_VERSION = '1.0.3'
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_EMAIL = 'googlemock@googlegroups.com'
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_COMMON_GMOCK_SYMBOLS = [
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# Matchers
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'_',
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'A',
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'AddressSatisfies',
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'AllOf',
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'An',
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'AnyOf',
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'ContainerEq',
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'Contains',
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'ContainsRegex',
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'DoubleEq',
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'ElementsAre',
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'ElementsAreArray',
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'EndsWith',
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'Eq',
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'Field',
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'FloatEq',
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'Ge',
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'Gt',
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'HasSubstr',
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'IsInitializedProto',
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'Le',
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'Lt',
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'MatcherCast',
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'Matches',
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'MatchesRegex',
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'NanSensitiveDoubleEq',
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'NanSensitiveFloatEq',
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'Ne',
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'Not',
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'NotNull',
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'Pointee',
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'Property',
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'Ref',
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'ResultOf',
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'SafeMatcherCast',
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'StartsWith',
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'StrCaseEq',
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'StrCaseNe',
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'StrEq',
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'StrNe',
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'Truly',
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'TypedEq',
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'Value',
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# Actions
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'Assign',
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'ByRef',
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'DeleteArg',
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'DoAll',
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'DoDefault',
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'IgnoreResult',
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'Invoke',
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'InvokeArgument',
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'InvokeWithoutArgs',
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'Return',
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'ReturnNew',
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'ReturnNull',
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'ReturnRef',
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'SaveArg',
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'SetArgReferee',
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'SetArgumentPointee',
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'SetArrayArgument',
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'SetErrnoAndReturn',
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'Throw',
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'WithArg',
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'WithArgs',
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'WithoutArgs',
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# Cardinalities
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'AnyNumber',
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'AtLeast',
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'AtMost',
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'Between',
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'Exactly',
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# Sequences
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'InSequence',
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'Sequence',
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# Misc
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'DefaultValue',
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'Mock',
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]
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# Regex for matching source file path and line number in the compiler's errors.
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_GCC_FILE_LINE_RE = r'(?P<file>.*):(?P<line>\d+):\s+'
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_CLANG_FILE_LINE_RE = r'(?P<file>.*):(?P<line>\d+):(?P<column>\d+):\s+'
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_CLANG_NON_GMOCK_FILE_LINE_RE = (
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r'(?P<file>.*[/\\^](?!gmock-)[^/\\]+):(?P<line>\d+):(?P<column>\d+):\s+')
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def _FindAllMatches(regex, s):
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"""Generates all matches of regex in string s."""
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r = re.compile(regex)
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return r.finditer(s)
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def _GenericDiagnoser(short_name, long_name, diagnoses, msg):
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"""Diagnoses the given disease by pattern matching.
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Can provide different diagnoses for different patterns.
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Args:
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short_name: Short name of the disease.
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long_name: Long name of the disease.
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diagnoses: A list of pairs (regex, pattern for formatting the diagnosis
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for matching regex).
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msg: Compiler's error messages.
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Yields:
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Tuples of the form
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(short name of disease, long name of disease, diagnosis).
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"""
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for regex, diagnosis in diagnoses:
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if re.search(regex, msg):
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diagnosis = '%(file)s:%(line)s:' + diagnosis
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for m in _FindAllMatches(regex, msg):
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yield (short_name, long_name, diagnosis % m.groupdict())
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def _NeedToReturnReferenceDiagnoser(msg):
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"""Diagnoses the NRR disease, given the error messages by the compiler."""
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gcc_regex = (r'In member function \'testing::internal::ReturnAction<R>.*\n'
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+ _GCC_FILE_LINE_RE + r'instantiated from here\n'
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r'.*gmock-actions\.h.*error: creating array with negative size')
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clang_regex = (r'error: array size is negative\r?\n'
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r'(.*\n)*?' +
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_CLANG_NON_GMOCK_FILE_LINE_RE +
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r'note: in instantiation of function template specialization '
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r'\'testing::internal::ReturnAction<(?P<type>).*>'
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r'::operator Action<.*>\' requested here')
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diagnosis = """
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You are using a Return() action in a function that returns a reference to
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%(type)s. Please use ReturnRef() instead."""
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return _GenericDiagnoser('NRR', 'Need to Return Reference',
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[(clang_regex, diagnosis),
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(gcc_regex, diagnosis % {'type': 'a type'})],
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msg)
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def _NeedToReturnSomethingDiagnoser(msg):
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"""Diagnoses the NRS disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'(instantiated from here\n.'
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r'*gmock.*actions\.h.*error: void value not ignored)'
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r'|(error: control reaches end of non-void function)')
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clang_regex1 = (_CLANG_FILE_LINE_RE +
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r'error: cannot initialize return object '
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r'of type \'Result\' \(aka \'(?P<return_type>).*\'\) '
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r'with an rvalue of type \'void\'')
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clang_regex2 = (_CLANG_FILE_LINE_RE +
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r'error: cannot initialize return object '
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r'of type \'(?P<return_type>).*\' '
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r'with an rvalue of type \'void\'')
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diagnosis = """
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You are using an action that returns void, but it needs to return
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%(return_type)s. Please tell it *what* to return. Perhaps you can use
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the pattern DoAll(some_action, Return(some_value))?"""
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return _GenericDiagnoser(
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'NRS',
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'Need to Return Something',
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[(gcc_regex, diagnosis % {'return_type': '*something*'}),
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(clang_regex1, diagnosis),
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(clang_regex2, diagnosis)],
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msg)
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def _NeedToReturnNothingDiagnoser(msg):
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"""Diagnoses the NRN disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'instantiated from here\n'
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r'.*gmock-actions\.h.*error: instantiation of '
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r'\'testing::internal::ReturnAction<R>::Impl<F>::value_\' '
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r'as type \'void\'')
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clang_regex1 = (r'error: field has incomplete type '
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r'\'Result\' \(aka \'void\'\)(\r)?\n'
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r'(.*\n)*?' +
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_CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
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r'of function template specialization '
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r'\'testing::internal::ReturnAction<(?P<return_type>.*)>'
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r'::operator Action<void \(.*\)>\' requested here')
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clang_regex2 = (r'error: field has incomplete type '
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r'\'Result\' \(aka \'void\'\)(\r)?\n'
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r'(.*\n)*?' +
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_CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
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r'of function template specialization '
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r'\'testing::internal::DoBothAction<.*>'
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r'::operator Action<(?P<return_type>.*) \(.*\)>\' '
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r'requested here')
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diagnosis = """
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You are using an action that returns %(return_type)s, but it needs to return
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void. Please use a void-returning action instead.
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All actions but the last in DoAll(...) must return void. Perhaps you need
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to re-arrange the order of actions in a DoAll(), if you are using one?"""
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return _GenericDiagnoser(
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'NRN',
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'Need to Return Nothing',
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[(gcc_regex, diagnosis % {'return_type': '*something*'}),
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(clang_regex1, diagnosis),
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(clang_regex2, diagnosis)],
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msg)
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def _IncompleteByReferenceArgumentDiagnoser(msg):
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"""Diagnoses the IBRA disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'instantiated from here\n'
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r'.*gtest-printers\.h.*error: invalid application of '
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r'\'sizeof\' to incomplete type \'(?P<type>.*)\'')
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clang_regex = (r'.*gtest-printers\.h.*error: invalid application of '
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r'\'sizeof\' to an incomplete type '
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r'\'(?P<type>.*)( const)?\'\r?\n'
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r'(.*\n)*?' +
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_CLANG_NON_GMOCK_FILE_LINE_RE +
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r'note: in instantiation of member function '
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r'\'testing::internal::FunctionMocker<.*>::Invoke\' '
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r'requested here')
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diagnosis = """
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In order to mock this function, Google Mock needs to see the definition
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of type "%(type)s" - declaration alone is not enough. Either #include
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the header that defines it, or change the argument to be passed
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by pointer."""
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return _GenericDiagnoser('IBRA', 'Incomplete By-Reference Argument Type',
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[(gcc_regex, diagnosis),
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(clang_regex, diagnosis)],
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msg)
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def _OverloadedFunctionMatcherDiagnoser(msg):
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"""Diagnoses the OFM disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for '
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r'call to \'Truly\(<unresolved overloaded function type>\)')
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clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching function for '
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r'call to \'Truly')
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diagnosis = """
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The argument you gave to Truly() is an overloaded function. Please tell
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your compiler which overloaded version you want to use.
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For example, if you want to use the version whose signature is
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bool Foo(int n);
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you should write
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Truly(static_cast<bool (*)(int n)>(Foo))"""
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return _GenericDiagnoser('OFM', 'Overloaded Function Matcher',
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[(gcc_regex, diagnosis),
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(clang_regex, diagnosis)],
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msg)
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def _OverloadedFunctionActionDiagnoser(msg):
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"""Diagnoses the OFA disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for call to '
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r'\'Invoke\(<unresolved overloaded function type>')
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clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching '
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r'function for call to \'Invoke\'\r?\n'
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r'(.*\n)*?'
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r'.*\bgmock-\w+-actions\.h:\d+:\d+:\s+'
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r'note: candidate template ignored:\s+'
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r'couldn\'t infer template argument \'FunctionImpl\'')
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diagnosis = """
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Function you are passing to Invoke is overloaded. Please tell your compiler
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which overloaded version you want to use.
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For example, if you want to use the version whose signature is
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bool MyFunction(int n, double x);
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you should write something like
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Invoke(static_cast<bool (*)(int n, double x)>(MyFunction))"""
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return _GenericDiagnoser('OFA', 'Overloaded Function Action',
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[(gcc_regex, diagnosis),
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(clang_regex, diagnosis)],
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msg)
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def _OverloadedMethodActionDiagnoser(msg):
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"""Diagnoses the OMA disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'error: no matching function for '
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r'call to \'Invoke\(.+, <unresolved overloaded function '
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r'type>\)')
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clang_regex = (_CLANG_FILE_LINE_RE + r'error: no matching function '
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r'for call to \'Invoke\'\r?\n'
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r'(.*\n)*?'
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r'.*\bgmock-\w+-actions\.h:\d+:\d+: '
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r'note: candidate function template not viable: '
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r'requires 1 argument, but 2 were provided')
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diagnosis = """
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The second argument you gave to Invoke() is an overloaded method. Please
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tell your compiler which overloaded version you want to use.
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For example, if you want to use the version whose signature is
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class Foo {
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...
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bool Bar(int n, double x);
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};
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you should write something like
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Invoke(foo, static_cast<bool (Foo::*)(int n, double x)>(&Foo::Bar))"""
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return _GenericDiagnoser('OMA', 'Overloaded Method Action',
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[(gcc_regex, diagnosis),
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(clang_regex, diagnosis)],
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msg)
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def _MockObjectPointerDiagnoser(msg):
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"""Diagnoses the MOP disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'error: request for member '
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r'\'gmock_(?P<method>.+)\' in \'(?P<mock_object>.+)\', '
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r'which is of non-class type \'(.*::)*(?P<class_name>.+)\*\'')
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clang_regex = (_CLANG_FILE_LINE_RE + r'error: member reference type '
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r'\'(?P<class_name>.*?) *\' is a pointer; '
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r'maybe you meant to use \'->\'\?')
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diagnosis = """
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The first argument to ON_CALL() and EXPECT_CALL() must be a mock *object*,
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not a *pointer* to it. Please write '*(%(mock_object)s)' instead of
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'%(mock_object)s' as your first argument.
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For example, given the mock class:
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class %(class_name)s : public ... {
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...
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MOCK_METHOD0(%(method)s, ...);
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};
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and the following mock instance:
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%(class_name)s* mock_ptr = ...
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you should use the EXPECT_CALL like this:
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EXPECT_CALL(*mock_ptr, %(method)s(...));"""
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return _GenericDiagnoser(
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'MOP',
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'Mock Object Pointer',
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[(gcc_regex, diagnosis),
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(clang_regex, diagnosis % {'mock_object': 'mock_object',
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'method': 'method',
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'class_name': '%(class_name)s'})],
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msg)
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def _NeedToUseSymbolDiagnoser(msg):
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"""Diagnoses the NUS disease, given the error messages by the compiler."""
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gcc_regex = (_GCC_FILE_LINE_RE + r'error: \'(?P<symbol>.+)\' '
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r'(was not declared in this scope|has not been declared)')
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clang_regex = (_CLANG_FILE_LINE_RE + r'error: use of undeclared identifier '
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r'\'(?P<symbol>.+)\'')
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diagnosis = """
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'%(symbol)s' is defined by Google Mock in the testing namespace.
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Did you forget to write
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using testing::%(symbol)s;
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?"""
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for m in (list(_FindAllMatches(gcc_regex, msg)) +
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list(_FindAllMatches(clang_regex, msg))):
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symbol = m.groupdict()['symbol']
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if symbol in _COMMON_GMOCK_SYMBOLS:
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yield ('NUS', 'Need to Use Symbol', diagnosis % m.groupdict())
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def _NeedToUseReturnNullDiagnoser(msg):
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"""Diagnoses the NRNULL disease, given the error messages by the compiler."""
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gcc_regex = ('instantiated from \'testing::internal::ReturnAction<R>'
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'::operator testing::Action<Func>\(\) const.*\n' +
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_GCC_FILE_LINE_RE + r'instantiated from here\n'
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r'.*error: no matching function for call to \'implicit_cast\('
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r'long int&\)')
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clang_regex = (r'\bgmock-actions.h:.* error: no matching function for '
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r'call to \'implicit_cast\'\r?\n'
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r'(.*\n)*?' +
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_CLANG_NON_GMOCK_FILE_LINE_RE + r'note: in instantiation '
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r'of function template specialization '
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r'\'testing::internal::ReturnAction<long>::operator '
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r'Action<(?P<type>.*)\(\)>\' requested here')
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diagnosis = """
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You are probably calling Return(NULL) and the compiler isn't sure how to turn
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NULL into %(type)s. Use ReturnNull() instead.
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Note: the line number may be off; please fix all instances of Return(NULL)."""
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return _GenericDiagnoser(
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'NRNULL', 'Need to use ReturnNull',
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[(clang_regex, diagnosis),
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(gcc_regex, diagnosis % {'type': 'the right type'})],
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msg)
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def _TypeInTemplatedBaseDiagnoser(msg):
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"""Diagnoses the TTB disease, given the error messages by the compiler."""
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# This version works when the type is used as the mock function's return
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# type.
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gcc_4_3_1_regex_type_in_retval = (
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r'In member function \'int .*\n' + _GCC_FILE_LINE_RE +
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r'error: a function call cannot appear in a constant-expression')
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gcc_4_4_0_regex_type_in_retval = (
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r'error: a function call cannot appear in a constant-expression'
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+ _GCC_FILE_LINE_RE + r'error: template argument 1 is invalid\n')
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# This version works when the type is used as the mock function's sole
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# parameter type.
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gcc_regex_type_of_sole_param = (
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_GCC_FILE_LINE_RE +
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r'error: \'(?P<type>.+)\' was not declared in this scope\n'
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r'.*error: template argument 1 is invalid\n')
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# This version works when the type is used as a parameter of a mock
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# function that has multiple parameters.
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gcc_regex_type_of_a_param = (
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r'error: expected `;\' before \'::\' token\n'
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+ _GCC_FILE_LINE_RE +
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r'error: \'(?P<type>.+)\' was not declared in this scope\n'
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r'.*error: template argument 1 is invalid\n'
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r'.*error: \'.+\' was not declared in this scope')
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diagnosis = """
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In a mock class template, types or typedefs defined in the base class
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template are *not* automatically visible. This is how C++ works. Before
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you can use a type or typedef named %(type)s defined in base class Base<T>, you
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need to make it visible. One way to do it is:
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typedef typename Base<T>::%(type)s %(type)s;"""
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return _GenericDiagnoser(
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'TTB', 'Type in Template Base',
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[(gcc_4_3_1_regex_type_in_retval, diagnosis % {'type': 'Foo'}),
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(gcc_4_4_0_regex_type_in_retval, diagnosis % {'type': 'Foo'}),
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(gcc_regex_type_of_sole_param, diagnosis),
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(gcc_regex_type_of_a_param, diagnosis)],
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msg)
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|
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def _WrongMockMethodMacroDiagnoser(msg):
|
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"""Diagnoses the WMM disease, given the error messages by the compiler."""
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|
|
|
gcc_regex = (_GCC_FILE_LINE_RE +
|
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r'.*this_method_does_not_take_(?P<wrong_args>\d+)_argument.*\n'
|
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r'.*\n'
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|
r'.*candidates are.*FunctionMocker<[^>]+A(?P<args>\d+)\)>')
|
|
clang_regex = (_CLANG_NON_GMOCK_FILE_LINE_RE +
|
|
r'error: array size is negative\r?\n'
|
|
r'(.*\n)*?'
|
|
r'(?P=file):(?P=line):(?P=column): error: too few arguments '
|
|
r'to function call, expected (?P<args>\d+), '
|
|
r'have (?P<wrong_args>\d+)')
|
|
diagnosis = """
|
|
You are using MOCK_METHOD%(wrong_args)s to define a mock method that has
|
|
%(args)s arguments. Use MOCK_METHOD%(args)s (or MOCK_CONST_METHOD%(args)s,
|
|
MOCK_METHOD%(args)s_T, MOCK_CONST_METHOD%(args)s_T as appropriate) instead."""
|
|
return _GenericDiagnoser('WMM', 'Wrong MOCK_METHODn Macro',
|
|
[(gcc_regex, diagnosis),
|
|
(clang_regex, diagnosis)],
|
|
msg)
|
|
|
|
|
|
def _WrongParenPositionDiagnoser(msg):
|
|
"""Diagnoses the WPP disease, given the error messages by the compiler."""
|
|
|
|
gcc_regex = (_GCC_FILE_LINE_RE +
|
|
r'error:.*testing::internal::MockSpec<.* has no member named \''
|
|
r'(?P<method>\w+)\'')
|
|
clang_regex = (_CLANG_NON_GMOCK_FILE_LINE_RE +
|
|
r'error: no member named \'(?P<method>\w+)\' in '
|
|
r'\'testing::internal::MockSpec<.*>\'')
|
|
diagnosis = """
|
|
The closing parenthesis of ON_CALL or EXPECT_CALL should be *before*
|
|
".%(method)s". For example, you should write:
|
|
EXPECT_CALL(my_mock, Foo(_)).%(method)s(...);
|
|
instead of:
|
|
EXPECT_CALL(my_mock, Foo(_).%(method)s(...));"""
|
|
return _GenericDiagnoser('WPP', 'Wrong Parenthesis Position',
|
|
[(gcc_regex, diagnosis),
|
|
(clang_regex, diagnosis)],
|
|
msg)
|
|
|
|
|
|
_DIAGNOSERS = [
|
|
_IncompleteByReferenceArgumentDiagnoser,
|
|
_MockObjectPointerDiagnoser,
|
|
_NeedToReturnNothingDiagnoser,
|
|
_NeedToReturnReferenceDiagnoser,
|
|
_NeedToReturnSomethingDiagnoser,
|
|
_NeedToUseReturnNullDiagnoser,
|
|
_NeedToUseSymbolDiagnoser,
|
|
_OverloadedFunctionActionDiagnoser,
|
|
_OverloadedFunctionMatcherDiagnoser,
|
|
_OverloadedMethodActionDiagnoser,
|
|
_TypeInTemplatedBaseDiagnoser,
|
|
_WrongMockMethodMacroDiagnoser,
|
|
_WrongParenPositionDiagnoser,
|
|
]
|
|
|
|
|
|
def Diagnose(msg):
|
|
"""Generates all possible diagnoses given the compiler error message."""
|
|
|
|
msg = re.sub(r'\x1b\[[^m]*m', '', msg) # Strips all color formatting.
|
|
|
|
diagnoses = []
|
|
for diagnoser in _DIAGNOSERS:
|
|
for diag in diagnoser(msg):
|
|
diagnosis = '[%s - %s]\n%s' % diag
|
|
if not diagnosis in diagnoses:
|
|
diagnoses.append(diagnosis)
|
|
return diagnoses
|
|
|
|
|
|
def main():
|
|
print ('Google Mock Doctor v%s - '
|
|
'diagnoses problems in code using Google Mock.' % _VERSION)
|
|
|
|
if sys.stdin.isatty():
|
|
print ('Please copy and paste the compiler errors here. Press c-D when '
|
|
'you are done:')
|
|
else:
|
|
print 'Waiting for compiler errors on stdin . . .'
|
|
|
|
msg = sys.stdin.read().strip()
|
|
diagnoses = Diagnose(msg)
|
|
count = len(diagnoses)
|
|
if not count:
|
|
print ("""
|
|
Your compiler complained:
|
|
8<------------------------------------------------------------
|
|
%s
|
|
------------------------------------------------------------>8
|
|
|
|
Uh-oh, I'm not smart enough to figure out what the problem is. :-(
|
|
However...
|
|
If you send your source code and the compiler's error messages to
|
|
%s, you can be helped and I can get smarter --
|
|
win-win for us!""" % (msg, _EMAIL))
|
|
else:
|
|
print '------------------------------------------------------------'
|
|
print 'Your code appears to have the following',
|
|
if count > 1:
|
|
print '%s diseases:' % (count,)
|
|
else:
|
|
print 'disease:'
|
|
i = 0
|
|
for d in diagnoses:
|
|
i += 1
|
|
if count > 1:
|
|
print '\n#%s:' % (i,)
|
|
print d
|
|
print ("""
|
|
How did I do? If you think I'm wrong or unhelpful, please send your
|
|
source code and the compiler's error messages to %s.
|
|
Then you can be helped and I can get smarter -- I promise I won't be upset!""" %
|
|
_EMAIL)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|