forked from OSchip/llvm-project
80 lines
2.8 KiB
C++
80 lines
2.8 KiB
C++
// RUN: %check_clang_tidy %s cppcoreguidelines-pro-bounds-constant-array-index %t -- -config='{CheckOptions: [{key: cppcoreguidelines-pro-bounds-constant-array-index.GslHeader, value: "dir1/gslheader.h"}]}' -- -std=c++11
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// CHECK-FIXES: #include "dir1/gslheader.h"
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typedef __SIZE_TYPE__ size_t;
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namespace std {
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template<typename T, size_t N>
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struct array {
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T& operator[](size_t n);
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T& at(size_t n);
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};
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}
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namespace gsl {
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template<class T, size_t N>
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T& at( T(&a)[N], size_t index );
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template<class T, size_t N>
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T& at( std::array<T, N> &a, size_t index );
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}
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constexpr int const_index(int base) {
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return base + 3;
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}
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void f(std::array<int, 10> a, int pos) {
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a [ pos / 2 /*comment*/] = 1;
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// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: do not use array subscript when the index is not an integer constant expression; use gsl::at() instead [cppcoreguidelines-pro-bounds-constant-array-index]
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// CHECK-FIXES: gsl::at(a, pos / 2 /*comment*/) = 1;
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int j = a[pos - 1];
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// CHECK-MESSAGES: :[[@LINE-1]]:11: warning: do not use array subscript when the index is not an integer constant expression; use gsl::at() instead
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// CHECK-FIXES: int j = gsl::at(a, pos - 1);
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a.at(pos-1) = 2; // OK, at() instead of []
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gsl::at(a, pos-1) = 2; // OK, gsl::at() instead of []
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a[-1] = 3;
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// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: std::array<> index -1 is negative [cppcoreguidelines-pro-bounds-constant-array-index]
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a[10] = 4;
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// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: std::array<> index 10 is past the end of the array (which contains 10 elements) [cppcoreguidelines-pro-bounds-constant-array-index]
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a[const_index(7)] = 3;
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// CHECK-MESSAGES: :[[@LINE-1]]:3: warning: std::array<> index 10 is past the end of the array (which contains 10 elements)
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a[0] = 3; // OK, constant index and inside bounds
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a[1] = 3; // OK, constant index and inside bounds
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a[9] = 3; // OK, constant index and inside bounds
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a[const_index(6)] = 3; // OK, constant index and inside bounds
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}
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void g() {
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int a[10];
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for (int i = 0; i < 10; ++i) {
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a[i] = i;
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// CHECK-MESSAGES: :[[@LINE-1]]:5: warning: do not use array subscript when the index is not an integer constant expression; use gsl::at() instead
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// CHECK-FIXES: gsl::at(a, i) = i;
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gsl::at(a, i) = i; // OK, gsl::at() instead of []
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}
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a[-1] = 3; // flagged by clang-diagnostic-array-bounds
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a[10] = 4; // flagged by clang-diagnostic-array-bounds
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a[const_index(7)] = 3; // flagged by clang-diagnostic-array-bounds
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a[0] = 3; // OK, constant index and inside bounds
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a[1] = 3; // OK, constant index and inside bounds
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a[9] = 3; // OK, constant index and inside bounds
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a[const_index(6)] = 3; // OK, constant index and inside bounds
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}
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struct S {
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int& operator[](int i);
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};
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void customOperator() {
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S s;
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int i = 0;
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s[i] = 3; // OK, custom operator
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}
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