================
@@ -376,6 +376,7 @@ LANGOPT(ConstexprCallDepth, 32, 512, Benign,
"maximum constexpr call depth")
LANGOPT(ConstexprStepLimit, 32, 1048576, Benign,
"maximum constexpr evaluation steps")
+LANGOPT(MaxTemplateForExpansions, 32, 256, Benign, "maximum template for
expansions")
LANGOPT(EnableNewConstInterp, 1, 0, Benign,
----------------
Sirraide wrote:
The main reason I introduced a limit is because if someone does this
```c++
void f() {
int x[10000000];
template for (auto y : x) {}
}
```
we basically just hang ‘for ever’ (I haven’t actually timed it, but it’s
definitely longer than a miniute; I didn’t wait for it to terminate on its
own). As I understand it, the purpose of similar limits (e.g. for constant
evaluation steps) is to prevent us from just hanging if a user ends up writing
code like this, and I believe this is a similar situation. I can definitely see
this happening accidentally with destructuring and iterating expansion
statements.
https://github.com/llvm/llvm-project/pull/165195
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