Use registry in gdbarch

gdbarch implements its own registry-like approach.  This patch changes
it to instead use registry.h.  It's a rather large patch but largely
uninteresting -- it's mostly a straightforward conversion from the old
approach to the new one.

The main benefit of this change is that it introduces type safety to
the gdbarch registry.  It also removes a bunch of code.

One possible drawback is that, previously, the gdbarch registry
differentiated between pre- and post-initialization setup.  This
doesn't seem very important to me, though.

1 files changed, 18 insertions, 18 deletions

diff --git a/gdb/go-lang.h b/gdb/go-lang.h
index fb57dd7..523501b 100644
--- a/gdb/go-lang.h
+++ b/gdb/go-lang.h
@@ -30,24 +30,24 @@ struct parser_state;
 
 struct builtin_go_type
 {
-  struct type *builtin_void;
-  struct type *builtin_char;
-  struct type *builtin_bool;
-  struct type *builtin_int;
-  struct type *builtin_uint;
-  struct type *builtin_uintptr;
-  struct type *builtin_int8;
-  struct type *builtin_int16;
-  struct type *builtin_int32;
-  struct type *builtin_int64;
-  struct type *builtin_uint8;
-  struct type *builtin_uint16;
-  struct type *builtin_uint32;
-  struct type *builtin_uint64;
-  struct type *builtin_float32;
-  struct type *builtin_float64;
-  struct type *builtin_complex64;
-  struct type *builtin_complex128;
+  struct type *builtin_void = nullptr;
+  struct type *builtin_char = nullptr;
+  struct type *builtin_bool = nullptr;
+  struct type *builtin_int = nullptr;
+  struct type *builtin_uint = nullptr;
+  struct type *builtin_uintptr = nullptr;
+  struct type *builtin_int8 = nullptr;
+  struct type *builtin_int16 = nullptr;
+  struct type *builtin_int32 = nullptr;
+  struct type *builtin_int64 = nullptr;
+  struct type *builtin_uint8 = nullptr;
+  struct type *builtin_uint16 = nullptr;
+  struct type *builtin_uint32 = nullptr;
+  struct type *builtin_uint64 = nullptr;
+  struct type *builtin_float32 = nullptr;
+  struct type *builtin_float64 = nullptr;
+  struct type *builtin_complex64 = nullptr;
+  struct type *builtin_complex128 = nullptr;
 };
 
 enum go_type