[PATCH] D78134: [Sema] Don't apply an lvalue-to-rvalue conversion to a discarded-value expression if it has an array type

[John McCall via Phabricator via cfe-commits]

rjmccall added a comment.

C++ says:

[expr.context]p2:

> In some contexts, an expression only appears for its side effects. Such an expression is called a discarded-value expression. The array-to-pointer (7.3.2) and function-to-pointer (7.3.3) standard conversions are not applied. The lvalue-to-rvalue conversion (7.3.1) is applied if and only if the expression is a glvalue of volatile-qualified type and it is one of the following:
> 
> - (list of special forms)

[conv.lval]p1:

> A glvalue of a non-function, non-array type T can be converted to a prvalue.

So I think the right fix is probably to make sure that `Sema::DefaultLvalueConversion` ignores gl-values of array type.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D78134/new/

https://reviews.llvm.org/D78134