forked from OSchip/llvm-project
62 lines
1.2 KiB
ReStructuredText
62 lines
1.2 KiB
ReStructuredText
.. title:: clang-tidy - readability-redundant-preprocessor
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readability-redundant-preprocessor
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==================================
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Finds potentially redundant preprocessor directives. At the moment the
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following cases are detected:
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* `#ifdef` .. `#endif` pairs which are nested inside an outer pair with the
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same condition. For example:
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.. code-block:: c++
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#ifdef FOO
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#ifdef FOO // inner ifdef is considered redundant
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void f();
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#endif
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#endif
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* Same for `#ifndef` .. `#endif` pairs. For example:
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.. code-block:: c++
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#ifndef FOO
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#ifndef FOO // inner ifndef is considered redundant
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void f();
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#endif
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#endif
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* `#ifndef` inside an `#ifdef` with the same condition:
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.. code-block:: c++
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#ifdef FOO
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#ifndef FOO // inner ifndef is considered redundant
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void f();
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#endif
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#endif
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* `#ifdef` inside an `#ifndef` with the same condition:
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.. code-block:: c++
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#ifndef FOO
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#ifdef FOO // inner ifdef is considered redundant
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void f();
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#endif
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#endif
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* `#if` .. `#endif` pairs which are nested inside an outer pair with the same
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condition. For example:
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.. code-block:: c++
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#define FOO 4
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#if FOO == 4
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#if FOO == 4 // inner if is considered redundant
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void f();
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#endif
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#endif
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