rjmccall added inline comments.
================
Comment at: clang/lib/Sema/SemaExpr.cpp:11989
+ else
+ return false;
+
----------------
I would suggest checking some preconditions and then just calling
`PrepareScalarCast`.
You should allow implicit conversions from class types, which somewhat
surprisingly I'm not sure we have a convenient method for, but which you can
find workable code for in `ConvertForConditional` in SemaExprCXX.cpp. Test
case is `struct DoubleWrapper { operator double(); };`, and you should test
using that even when the element type isn't a double.
In SemaOverload, you should add builtin candidates for these operators if one
operand or the other is a matrix type. Basically:
1. Collect matrix types in `AddTypesConvertedFrom`
2. For each matrix type `M` on the LHS, add candidates for `(M, M) -> M` and
`(M, E) -> M`, and then analogously on the RHS. Although you might need to
avoid adding redundant candidates if the same type shows up on both sides.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D76793/new/
https://reviews.llvm.org/D76793
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