implement rfc-2528 type_changing-struct-update#90035

Merged

bors merged 4 commits intorust-lang:masterfrom

SparrowLii:rfc2528

Nov 9, 2021

Commits on Oct 28, 2021

implement type-changing-struct-update
SparrowLii
committed

Commits on Oct 29, 2021

move the processing part of `base_expr` into `check_expr_struct_fields`
SparrowLii
committed
Add feature trigger and correct `is_struct` check
SparrowLii
committed

Commits on Nov 5, 2021

Add feature trigger and enable is_struct check
SparrowLii
committed