[clang] Fix new-expression with elaborated-type-specifier

Expressions like
```
struct A {};
...
new struct A {};
struct A* b = (1 == 1) ? new struct A : new struct A;

```
were parsed as redefinitions of `struct A` and failed, however as clarified by
`CWG2141` new-expression cannot define a type, so both these examples
should be considered as references to the previously declared `struct A`.
The patch adds a "new" kind context for parsing declaration specifiers in
addition to already existing declarator context in order to track that
the parser is inside of a new expression.

Fixes https://github.com/llvm/llvm-project/issues/34341

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D153857

0 files changed, 0 insertions, 0 deletions