\ Screen and compilation locals                                      vandys
only extensions definitions

128 constant (maxlocalQ)
create (scrQ)   0 , (maxlocalQ) 2* cells allot
create (localQ)   0 , (maxlocalQ) 2* cells allot
vocabulary (locals)   current cell+ @ constant (locals-body)

: (saveLocal) ( a-q -- )   dup @ dup (maxlocalQ) >= abort" Too many locals"
   ( a-q u ) 2dup 1+ swap !   2* 1+ cells +   last @   current @   rot 2! ;
also forth definitions
: scrLocal ( -- )   (scrQ) (saveLocal) ;
: Local ( -- )   (localQ) (saveLocal) ;
extensions definitions

: (entry->locals) ( nfa -- )   (locals-body) @ over nfa>lfa !
   (locals-body) ! ;








\ Screen and compilation locals                                      vandys

: (hide) ( entry voc -- )   begin dup @ ?dup while
      ( entry-nfa a-'nfa nfa ) 2 pick over = if
         nfa>lfa @ swap !   (entry->locals)   exit   then
   nip nfa>lfa repeat
   2drop ( Entry disappeared, perhaps "forget" ) ;
: (flushQ) ( a-q -- )   dup @+ ( a-q a-q' u ) 0 ?do
   dup 2@ (hide)   cell+ cell+ loop   drop off ;
: (flushScr) ( -- )   (scrQ) (flushQ) ;
: (flushLocal) ( -- )   (localQ) (flushQ) ;

' (flushScr) ('endScr) !
' (flushLocal) ('endDef) !











\ Retroactively hide named words                                     vandys

: (hide:) ( a -- )   context begin @+ ?dup while
      ( a-token a-ctx a-voc ) 2 pick over find   nip ?dup if
         ( a-token a-ctx a-voc nfa ) swap (hide) 2drop exit   then
   drop repeat   drop .id 1 abort"  not found" ;
: hide: ( -- )   begin token dup c@ while
      ( a-token ) (hide:)   repeat drop ;

















\ Named local variables for functions                                vandys

[ifdef] DEPRECATED

*** This capability implemented in "extras", ignore this stuff ***






variable local-idx scrLocal   variable local-last scrLocal
: !{ ( u -- )
: ({) ( a -- )   (local-idx) @   {->ent   compile !{ cells ,
   ; scrLocal
: { ( -- )   last @ (local-last) @ <> if   (local-idx) off   then
   begin token dup c@ while
      c" }" over $strcmp 0= if   drop exit   then
   ({) repeat  1 abort" Closing brace missing" ; immediate compile-only

[then]