Commits on Oct 20, 2023

1. Rewrite gdb pretty-printer registration …

   Currently, the Rust pretty-printers are registered in gdb using the
   uninformative name "lookup":
   
       (gdb) info pretty-printer
       global pretty-printers:
       [...]
       objfile /home/tromey/[...]
         lookup
   
   It's nicer for users if the top-level registration is given a clear
   name.  Additionally, gdb lets users individually enable and disable
   specific printers, provided they are registered correctly.
   
   This patch implements both these ideas.  Now the output looks like:
   
       (gdb) info pretty-printer
       global pretty-printers:
       [...]
       objfile /home/tromey/[...]
         rust
   	StdArc
   	StdBTreeMap
   	StdBTreeSet
   	StdCell
   	StdHashMap
   	StdHashSet
   	StdNonZeroNumber
   	StdOsString
   	StdRc
   	StdRef
   	StdRefCell
   	StdRefMut
   	StdSlice
   	StdStr
   	StdString
   	StdVec
   	StdVecDeque

   

   tromey committed Oct 20, 2023
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