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Suppress operatorEqVarError for known non-copyable types (#3869) 

* Fix FP operatorEqVarError with class hierarchy

* Suppress operatorEqVarError for std::mutex

* Add test, non-copyable Qt types

* Update cppcheck-cfg.rng
This commit is contained in:
chrchr-github 2022-03-03 09:41:26 +01:00 committed by GitHub
parent 915ae4b845
commit 8a7992c6ac
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5 changed files with 34 additions and 1 deletions
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12
cfg/cppcheck-cfg.rng
View File

@ -534,6 +534,18 @@
</choice>
</zeroOrMore>
</element>
<element name="operatorEqVarError">
<zeroOrMore>
<choice>
<element name="check">
<ref name="DATA-EXTNAME"/>
</element>
<element name="suppress">
<ref name="DATA-EXTNAME"/>
</element>
</choice>
</zeroOrMore>
</element>
</optional>
</element>

6
cfg/qt.cfg
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@ -5109,6 +5109,12 @@
<suppress>QApplication</suppress>
<suppress>QMutexLocker</suppress>
</unusedvar>
<operatorEqVarError>
<suppress>QMutex</suppress>
<suppress>QRecursiveMutex</suppress>
<suppress>QSemaphore</suppress>
<suppress>QReadWriteLock</suppress>
</operatorEqVarError>
</type-checks>
<!-- Treat QStringList as QList<QString> since we can't remove the template parameter when we inherit. -->
<define name="QStringList" value="QList&lt;QString&gt;"/>

4
cfg/std.cfg
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@ -8390,6 +8390,10 @@ initializer list (7) string& replace (const_iterator i1, const_iterator i2, init
<suppress>std::basic_ofstream</suppress>
<check>std::pair</check>
</unusedvar>
<operatorEqVarError>
<suppress>std::mutex</suppress>
<suppress>std::recursive_mutex</suppress>
</operatorEqVarError>
</type-checks>
<podtype name="char8_t,std::char8_t" sign="u" size="1"/>
<podtype name="char16_t,std::char16_t" sign="u" size="2"/>

2
lib/checkclass.cpp
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@ -275,7 +275,7 @@ void CheckClass::constructors()
}
}
if (classNameUsed)
if (classNameUsed && mSettings->library.getTypeCheck("operatorEqVarError", var.getTypeName()) != Library::TypeCheck::suppress)
operatorEqVarError(func.token, scope->className, var.name(), missingCopy);
} else if (func.access != AccessControl::Private || mSettings->standards.cpp >= Standards::CPP11) {
// If constructor is not in scope then we maybe using a constructor from a different template specialization

11
test/testconstructors.cpp
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@ -1854,6 +1854,17 @@ private:
"void Fred::operator=(const Fred &f)\n"
"{ }", true);
ASSERT_EQUALS("[test.cpp:13]: (warning, inconclusive) Member variable 'Fred::ints' is not assigned a value in 'Fred::operator='.\n", errout.str());
Settings s;
s.certainty.setEnabled(Certainty::inconclusive, true);
s.severity.enable(Severity::style);
s.severity.enable(Severity::warning);
LOAD_LIB_2(s.library, "std.cfg");
check("struct S {\n"
" S& operator=(const S& s) { return *this; }\n"
" std::mutex m;\n"
"};\n", s);
ASSERT_EQUALS("", errout.str());
}
void uninitVar1() {