schenker wrote:
@PiotrZSL I changed some things, please take another look.
All const operator calls are now considered to be side-effect free. This also
fixes some false-positives, e.g.
```
struct t {
int operator+=(int i) const { return i; }
} t;
assert(t += 1);
```
is no longer reported.
I added `<<` and `>>` to the list of operators with side-effects.
Only const calls are reported, so
```
std::stringstream ss;
assert(ss << 1);
```
is reported, but
```
assert(5 << 1);
```
is not.
There is no overlap with `CheckFunctionCalls`, `CXXOperatorCallExpr`s are not
affected by the flag.
https://github.com/llvm/llvm-project/pull/71974
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