llvm-project/clang/test/SemaCXX/warn-unsafe-buffer-usage-fixits-assign-to-array-subscr-on-ptr.cpp
jkorous-apple fde4b80cb7
[-Wunsafe-buffer-usage] Minimize fixit range for pointer variables (#81935)
Example:
int * const my_var = my_initializer;

Currently when transforming my_var to std::span the fixits:
- replace "int * const my_var = " with "std::span<int> const my_var {"
- add ", SIZE}" after "my_initializer" where SIZE is either inferred or
a placeholder

This patch makes that behavior less intrusive by not modifying variable
cv-qualifiers and initialization syntax.
The new behavior is:
- replace "int *" with "std::span<int>"
- add "{" before "my_initializer"
- add ", SIZE}" after "my_initializer"

This is an improvement on its own - since we don't touch the identifier,
we automatically can handle macros in them.
It also simplifies future work on initializer fixits.
2024-02-16 14:25:21 -08:00

19 lines
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// RUN: %clang_cc1 -std=c++20 -Wunsafe-buffer-usage \
// RUN: -fsafe-buffer-usage-suggestions \
// RUN: -fdiagnostics-parseable-fixits %s 2>&1 | FileCheck %s
// TODO cases where we don't want fixits
// The Fix-It for unsafe operation is trivially empty.
// In order to test that our machinery recognizes that we can test if the variable declaration gets a Fix-It.
// If the operation wasn't handled propertly the declaration won't get Fix-It.
// By testing presence of the declaration Fix-It we indirectly test presence of the trivial Fix-It for its operations.
void test() {
int *p = new int[10];
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:3-[[@LINE-1]]:8}:"std::span<int> "
// CHECK: fix-it:"{{.*}}":{[[@LINE-2]]:12-[[@LINE-2]]:12}:"{"
// CHECK: fix-it:"{{.*}}":{[[@LINE-3]]:23-[[@LINE-3]]:23}:", 10}"
p[5] = 1;
// CHECK-NOT: fix-it:
}