xref: /llvm-project/clang/test/SemaCXX/warn-unsafe-buffer-usage-fixits-pre-increment.cpp (revision fde4b80cb772897a8cf0b3d022f3041e10b6e816)
1 // RUN: %clang_cc1 -std=c++20 -Wunsafe-buffer-usage \
2 // RUN:            -fsafe-buffer-usage-suggestions \
3 // RUN:            -triple=arm-apple \
4 // RUN:            -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
5 
6 void foo(int * , int *);
7 
simple()8 void simple() {
9   int * p = new int[10];
10   // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:3-[[@LINE-1]]:8}:"std::span<int>"
11   // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:13}:"{"
12   // CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:24-[[@LINE-3]]:24}:", 10}"
13   bool b = ++p;
14   // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:12-[[@LINE-1]]:15}:"(p = p.subspan(1)).data()"
15   unsigned long long n = (unsigned long long) ++p;
16   // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:47-[[@LINE-1]]:50}:"(p = p.subspan(1)).data()"
17   if (++p) {
18     // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:7-[[@LINE-1]]:10}:"(p = p.subspan(1)).data()"
19   }
20   if (++p - ++p) {
21     // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:7-[[@LINE-1]]:10}:"(p = p.subspan(1)).data()"
22     // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:16}:"(p = p.subspan(1)).data()"
23   }
24   foo(++p, p);
25   // CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:7-[[@LINE-1]]:10}:"(p = p.subspan(1)).data()"
26   // CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:13-[[@LINE-2]]:13}:".data()"
27 
28   // FIXME: Don't know how to fix the following cases:
29   // CHECK-NOT: fix-it:"{{.*}}":{
30   int * g = new int[10];
31   int * a[10];
32   a[0] = ++g;
33   foo(g++, g);
34   if (++(a[0])) {
35   }
36 }
37