forked from OSchip/llvm-project
61 lines
1.6 KiB
ReStructuredText
61 lines
1.6 KiB
ReStructuredText
.. title:: clang-tidy - modernize-avoid-c-arrays
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modernize-avoid-c-arrays
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========================
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`cppcoreguidelines-avoid-c-arrays` redirects here as an alias for this check.
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`hicpp-avoid-c-arrays` redirects here as an alias for this check.
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Finds C-style array types and recommend to use ``std::array<>`` /
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``std::vector<>``. All types of C arrays are diagnosed.
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However, fix-it are potentially dangerous in header files and are therefore not
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emitted right now.
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.. code:: c++
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int a[] = {1, 2}; // warning: do not declare C-style arrays, use std::array<> instead
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int b[1]; // warning: do not declare C-style arrays, use std::array<> instead
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void foo() {
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int c[b[0]]; // warning: do not declare C VLA arrays, use std::vector<> instead
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}
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template <typename T, int Size>
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class array {
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T d[Size]; // warning: do not declare C-style arrays, use std::array<> instead
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int e[1]; // warning: do not declare C-style arrays, use std::array<> instead
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};
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array<int[4], 2> d; // warning: do not declare C-style arrays, use std::array<> instead
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using k = int[4]; // warning: do not declare C-style arrays, use std::array<> instead
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However, the ``extern "C"`` code is ignored, since it is common to share
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such headers between C code, and C++ code.
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.. code:: c++
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// Some header
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extern "C" {
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int f[] = {1, 2}; // not diagnosed
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int j[1]; // not diagnosed
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inline void bar() {
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{
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int j[j[0]]; // not diagnosed
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}
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}
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}
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Similarly, the ``main()`` function is ignored. Its second and third parameters
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can be either ``char* argv[]`` or ``char** argv``, but can not be
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``std::array<>``.
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