while(true){!break;}while(true){--break;}while(true){1+break;}All three pass the grammar as defined in grammar.y, and I believe the first two have no impact on actual zig compilation results. The third one fails the zig compiler due to unreachable code (it considers the 1 + to be unreachable)
PrimaryExpr is the relevant rule. All of the binary and unary operations coming in from PrefixExpr on the left-hand-side is what allows for this unexpected grammar.
```zig
while (true) {
!break;
}
while (true) {
--break;
}
while (true) {
1 + break;
}
```
All three pass the grammar as defined in `grammar.y`, and I believe the first two have no impact on actual zig compilation results. The third one fails the zig compiler due to unreachable code (it considers the `1 +` to be unreachable)
`PrimaryExpr` is the relevant [rule](https://github.com/ziglang/zig-spec/blob/75129c7a34010ead828055c26a6d41d1516faa97/grammar/grammar.y#L99). All of the binary and unary operations coming in from `PrefixExpr` on the left-hand-side is what allows for this unexpected grammar.