38 lines
985 B
ReStructuredText
38 lines
985 B
ReStructuredText
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.. title:: clang-tidy - readability-redundant-declaration
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readability-redundant-declaration
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=================================
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Finds redundant variable and function declarations.
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.. code-block:: c++
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extern int X;
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extern int X;
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becomes
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.. code-block:: c++
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extern int X;
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Such redundant declarations can be removed without changing program behaviour.
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They can for instance be unintentional left overs from previous refactorings
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when code has been moved around. Having redundant declarations could in worst
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case mean that there are typos in the code that cause bugs.
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Normally the code can be automatically fixed, :program:`clang-tidy` can remove
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the second declaration. However there are 2 cases when you need to fix the code
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manually:
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* When the declarations are in different header files;
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* When multiple variables are declared together.
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Options
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-------
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.. option:: IgnoreMacros
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If set to non-zero, the check will not give warnings inside macros. Default
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is `1`.
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