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, 24 insertions, 24 deletions

diff --git a/gdb/d-lang.h b/gdb/d-lang.h
index 56e418d..967a9b4 100644
--- a/gdb/d-lang.h
+++ b/gdb/d-lang.h
@@ -28,30 +28,30 @@
 
 struct builtin_d_type
 {
-  struct type *builtin_void;
-  struct type *builtin_bool;
-  struct type *builtin_byte;
-  struct type *builtin_ubyte;
-  struct type *builtin_short;
-  struct type *builtin_ushort;
-  struct type *builtin_int;
-  struct type *builtin_uint;
-  struct type *builtin_long;
-  struct type *builtin_ulong;
-  struct type *builtin_cent;
-  struct type *builtin_ucent;
-  struct type *builtin_float;
-  struct type *builtin_double;
-  struct type *builtin_real;
-  struct type *builtin_ifloat;
-  struct type *builtin_idouble;
-  struct type *builtin_ireal;
-  struct type *builtin_cfloat;
-  struct type *builtin_cdouble;
-  struct type *builtin_creal;
-  struct type *builtin_char;
-  struct type *builtin_wchar;
-  struct type *builtin_dchar;
+  struct type *builtin_void = nullptr;
+  struct type *builtin_bool = nullptr;
+  struct type *builtin_byte = nullptr;
+  struct type *builtin_ubyte = nullptr;
+  struct type *builtin_short = nullptr;
+  struct type *builtin_ushort = nullptr;
+  struct type *builtin_int = nullptr;
+  struct type *builtin_uint = nullptr;
+  struct type *builtin_long = nullptr;
+  struct type *builtin_ulong = nullptr;
+  struct type *builtin_cent = nullptr;
+  struct type *builtin_ucent = nullptr;
+  struct type *builtin_float = nullptr;
+  struct type *builtin_double = nullptr;
+  struct type *builtin_real = nullptr;
+  struct type *builtin_ifloat = nullptr;
+  struct type *builtin_idouble = nullptr;
+  struct type *builtin_ireal = nullptr;
+  struct type *builtin_cfloat = nullptr;
+  struct type *builtin_cdouble = nullptr;
+  struct type *builtin_creal = nullptr;
+  struct type *builtin_char = nullptr;
+  struct type *builtin_wchar = nullptr;
+  struct type *builtin_dchar = nullptr;
 };
 
 /* Defined in d-exp.y.  */