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[smlnj] View of /sml/trunk/src/MLRISC/gc-safety/gc-type.sig
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View of /sml/trunk/src/MLRISC/gc-safety/gc-type.sig

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Revision 499 - (download) (as text) (annotate)
Tue Dec 7 15:44:50 1999 UTC (19 years, 8 months ago) by monnier
File size: 688 byte(s)
This commit was generated by cvs2svn to compensate for changes in r498,
which included commits to RCS files with non-trunk default branches.
(*
 * Abstract interface for GC types.
 *)
signature GC_TYPE =
sig

   type objtype 
   type gctype 

   val CONST  : int -> gctype                   (* integer constant *)
   val NONREF : objtype ref -> gctype           (* non-reference value *)  
   val REF    : objtype ref -> gctype           (* a reference to a gc object *)
   val ADD    : int * gctype * gctype -> gctype (* address arithmetic *)
   val SUB    : int * gctype * gctype -> gctype (* address arithmetic *)
   val BOT    : gctype
   val TOP    : gctype

   val ==     : gctype * gctype -> bool
   val join   : gctype * gctype -> gctype
   val meet   : gctype * gctype -> gctype

   val toString : gctype -> string

end

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