c++: make strip_typedefs generalize strip_typedefs_expr
Currently if we have a TREE_VEC of types that we want to strip of typedefs,
we unintuitively need to call strip_typedefs_expr instead of strip_typedefs
since only strip_typedefs_expr handles TREE_VEC, and it also dispatches
to strip_typedefs when given a type. But this seems backwards: arguably
strip_typedefs_expr should be the more specialized function, which
strip_typedefs dispatches to (and thus generalizes).
So this patch makes strip_typedefs subsume strip_typedefs_expr rather
than vice versa, which allows for some simplifications.
gcc/cp/ChangeLog:
* tree.cc (strip_typedefs): Move TREE_LIST handling to
strip_typedefs_expr. Dispatch to strip_typedefs_expr for
non-type 't'.
<case TYPENAME_TYPE>: Remove manual dispatching to
strip_typedefs_expr.
<case TRAIT_TYPE>: Likewise.
(strip_typedefs_expr): Replaces calls to strip_typedefs_expr
with strip_typedefs throughout. Don't dispatch to strip_typedefs
for type 't'.
<case TREE_LIST>: Replace this with the better version from
strip_typedefs.