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Fix #21020 - Indexing a *cast* AA yields no lvalue anymore (#21029)

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Martin Kinkelin 2025-03-19 00:15:23 +01:00 • committed by GitHub
parent 6d57da76e4
commit 8db14cf846
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1
compiler/src/dmd/expression.d
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@ -3632,6 +3632,7 @@ extern (C++) final class CastExp : UnaExp
if (rvalue || !e1.isLvalue())
return false;
return (to.ty == Tsarray && (e1.type.ty == Tvector || e1.type.ty == Tsarray)) ||
(to.ty == Taarray && e1.type.ty == Taarray) ||
e1.type.mutableOf.unSharedOf().equals(to.mutableOf().unSharedOf());
}

11
compiler/test/runnable/test21020.d Normal file
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@ -0,0 +1,11 @@
// https://github.com/dlang/dmd/issues/21020
shared struct Queue {
int[int] map;
}
void main() {
auto queue = Queue();
(cast(int[int]) queue.map)[1] = 2;
assert(queue.map[1] == 2);
}