gdb: move RequireLongest to gdbsupport/traits.h

Move it out of defs.h.

Change-Id: Ie1743d41a57f81667650048563e66073c72230cf
Approved-By: John Baldwin <jhb@FreeBSD.org>

gdb/defs.h

@@ -63,10 +63,6 @@
 #include "gdbsupport/enum-flags.h"
 #include "gdbsupport/array-view.h"
 
-template<typename T>
-using RequireLongest = gdb::Requires<gdb::Or<std::is_same<T, LONGEST>,
-					     std::is_same<T, ULONGEST>>>;
-
 /* Just in case they're not defined in stdio.h.  */
 
 #ifndef SEEK_SET

gdb/extract-store-integer.h

@@ -18,6 +18,8 @@
 #ifndef GDB_EXTRACT_STORE_INTEGER_H
 #define GDB_EXTRACT_STORE_INTEGER_H
 
+#include "gdbsupport/traits.h"
+
 template<typename T, typename = RequireLongest<T>>
 T extract_integer (gdb::array_view<const gdb_byte>, enum bfd_endian byte_order);
 

gdb/regcache.h

@@ -23,6 +23,7 @@
 #include "gdbsupport/array-view.h"
 #include "gdbsupport/common-regcache.h"
 #include "gdbsupport/function-view.h"
+#include "gdbsupport/traits.h"
 
 struct regcache;
 struct regset;

gdbsupport/traits.h

@@ -143,4 +143,8 @@ template<typename Condition>
 using Requires = typename std::enable_if<Condition::value, void>::type;
 }
 
+template<typename T>
+using RequireLongest = gdb::Requires<gdb::Or<std::is_same<T, LONGEST>,
+					     std::is_same<T, ULONGEST>>>;
+
 #endif /* COMMON_TRAITS_H */