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+\ checks that postpone works correctly with words with special
+\ compilation semantics
+
+\ by M. Anton Ertl 1996
+
+\ This file is based on John Hayes' core.fr (coretest.fs), which has
+\ the following copyright notice:
+
+\ (C) 1995 JOHNS HOPKINS UNIVERSITY / APPLIED PHYSICS LABORATORY
+\ MAY BE DISTRIBUTED FREELY AS LONG AS THIS COPYRIGHT NOTICE REMAINS.
+
+\ my contributions to this file are in the public domain
+
+\ you have to load John Hayes' tester.fs (=tester.fr) and coretest.fs
+\ (core.fr) first
+
+\ These tests are especially useful for showing that state-smart
+\ implementations of words with special compilation semantics,
+\ combined with a straight-forward implementation of POSTPONE (and
+\ [COMPILE]) do not conform to the ANS Forth standard. The essential
+\ sentences in the standad are:
+
+\ 6.1.2033 POSTPONE CORE
+\ ...
+\ Compilation: ( <spaces>name -- )
+
+\ Skip leading space delimiters. Parse name delimited by a space. Find
+\ name. Append the compilation semantics of name to the current
+\ definition.
+
+\ 6.2.2530 [COMPILE] bracket-compile CORE EXT
+\ ...
+\ Compilation: ( <spaces>name -- )
+
+\ Skip leading space delimiters. Parse name delimited by a space. Find
+\ name. If name has other than default compilation semantics, append
+\ them to the current definition;...
+
+
+\ Note that the compilation semantics are appended, not some
+\ state-dependent semantics.
+
+\ first I test against a non-ANS solution suggested by Bernd Paysan
+
+: STATE@-NOW ( -- F )
+ STATE @ ; IMMEDIATE
+
+: STATE@ ( -- F )
+ POSTPONE STATE@-NOW ;
+
+t{ STATE@ -> STATE @ }t
+
+0 INVERT CONSTANT MAX-UINT
+0 INVERT 1 RSHIFT CONSTANT MAX-INT
+0 INVERT 1 RSHIFT INVERT CONSTANT MIN-INT
+0 INVERT 1 RSHIFT CONSTANT MID-UINT
+0 INVERT 1 RSHIFT INVERT CONSTANT MID-UINT+1
+
+\ here I test POSTPONE with all core words with special compilation
+\ semantics.
+
+TESTING POSTPONE +LOOP
+
+: POSTPONE-+LOOP
+ POSTPONE +LOOP ;
+
+t{ : PGD2 DO I -1 [ POSTPONE-+LOOP ] ; -> }t
+t{ 1 4 PGD2 -> 4 3 2 1 }t
+t{ -1 2 PGD2 -> 2 1 0 -1 }t
+t{ MID-UINT MID-UINT+1 PGD2 -> MID-UINT+1 MID-UINT }t
+
+t{ : PGD4 DO 1 0 DO J LOOP -1 [ POSTPONE-+LOOP ] ; -> }t
+t{ 1 4 PGD4 -> 4 3 2 1 }t
+t{ -1 2 PGD4 -> 2 1 0 -1 }t
+t{ MID-UINT MID-UINT+1 PGD4 -> MID-UINT+1 MID-UINT }t
+
+TESTING POSTPONE ."
+
+: POSTPONE-."
+ POSTPONE ." ;
+
+: PDQ2 [ POSTPONE-." YOU SHOULD SEE THIS LATER. " ] CR ;
+: PDQ1 [ POSTPONE-." YOU SHOULD SEE THIS FIRST. " ] CR ;
+t{ PDQ1 PDQ2 -> }t
+
+TESTING POSTPONE ;
+: POSTPONE-;
+ POSTPONE ; ;
+
+t{ : PSC [ POSTPONE-; -> }t
+t{ PSC -> }t
+
+TESTING POSTPONE ABORT"
+
+: POSTPONE-ABORT"
+ POSTPONE ABORT" ;
+
+t{ : PAQ1 [ POSTPONE-ABORT" THIS SHOULD NOT ABORT" ] ; -> }t
+
+TESTING POSTPONE BEGIN
+: POSTPONE-BEGIN
+ POSTPONE BEGIN ;
+
+t{ : PB3 [ POSTPONE-BEGIN ] DUP 5 < WHILE DUP 1+ REPEAT ; -> }t
+t{ 0 PB3 -> 0 1 2 3 4 5 }t
+t{ 4 PB3 -> 4 5 }t
+t{ 5 PB3 -> 5 }t
+t{ 6 PB3 -> 6 }t
+
+t{ : PB4 [ POSTPONE-BEGIN ] DUP 1+ DUP 5 > UNTIL ; -> }t
+t{ 3 PB4 -> 3 4 5 6 }t
+t{ 5 PB4 -> 5 6 }t
+t{ 6 PB4 -> 6 7 }t
+
+t{ : PB5 [ POSTPONE-BEGIN ] DUP 2 > WHILE DUP 5 < WHILE DUP 1+ REPEAT 123 ELSE 345 THEN ; -> }t
+t{ 1 PB5 -> 1 345 }t
+t{ 2 PB5 -> 2 345 }t
+t{ 3 PB5 -> 3 4 5 123 }t
+t{ 4 PB5 -> 4 5 123 }t
+t{ 5 PB5 -> 5 123 }t
+
+TESTING POSTPONE DO
+: POSTPONE-DO
+ POSTPONE DO ;
+
+t{ : PDO1 [ POSTPONE-DO ] I LOOP ; -> }t
+t{ 4 1 PDO1 -> 1 2 3 }t
+t{ 2 -1 PDO1 -> -1 0 1 }t
+t{ MID-UINT+1 MID-UINT PDO1 -> MID-UINT }t
+
+t{ : PDO2 [ POSTPONE-DO ] I -1 +LOOP ; -> }t
+t{ 1 4 PDO2 -> 4 3 2 1 }t
+t{ -1 2 PDO2 -> 2 1 0 -1 }t
+t{ MID-UINT MID-UINT+1 PDO2 -> MID-UINT+1 MID-UINT }t
+
+t{ : PDO3 [ POSTPONE-DO ] 1 0 [ POSTPONE-DO ] J LOOP LOOP ; -> }t
+t{ 4 1 PDO3 -> 1 2 3 }t
+t{ 2 -1 PDO3 -> -1 0 1 }t
+t{ MID-UINT+1 MID-UINT PDO3 -> MID-UINT }t
+
+t{ : PDO4 [ POSTPONE-DO ] 1 0 [ POSTPONE-DO ] J LOOP -1 +LOOP ; -> }t
+t{ 1 4 PDO4 -> 4 3 2 1 }t
+t{ -1 2 PDO4 -> 2 1 0 -1 }t
+t{ MID-UINT MID-UINT+1 PDO4 -> MID-UINT+1 MID-UINT }t
+
+t{ : PDO5 123 SWAP 0 [ POSTPONE-DO ] I 4 > IF DROP 234 LEAVE THEN LOOP ; -> }t
+t{ 1 PDO5 -> 123 }t
+t{ 5 PDO5 -> 123 }t
+t{ 6 PDO5 -> 234 }t
+
+t{ : PDO6 ( PAT: {0 0},{0 0}{1 0}{1 1},{0 0}{1 0}{1 1}{2 0}{2 1}{2 2} )
+ 0 SWAP 0 [ POSTPONE-DO ]
+ I 1+ 0 [ POSTPONE-DO ] I J + 3 = IF I UNLOOP I UNLOOP EXIT THEN 1+ LOOP
+ LOOP ; -> }t
+t{ 1 PDO6 -> 1 }t
+t{ 2 PDO6 -> 3 }t
+t{ 3 PDO6 -> 4 1 2 }t
+
+TESTING POSTPONE DOES>
+: POSTPONE-DOES>
+ POSTPONE DOES> ;
+
+t{ : PDOES1 [ POSTPONE-DOES> ] @ 1 + ; -> }t
+t{ : PDOES2 [ POSTPONE-DOES> ] @ 2 + ; -> }t
+t{ CREATE PCR1 -> }t
+t{ PCR1 -> HERE }t
+t{ ' PCR1 >BODY -> HERE }t
+t{ 1 , -> }t
+t{ PCR1 @ -> 1 }t
+t{ PDOES1 -> }t
+t{ PCR1 -> 2 }t
+t{ PDOES2 -> }t
+t{ PCR1 -> 3 }t
+
+t{ : PWEIRD: CREATE [ POSTPONE-DOES> ] 1 + [ POSTPONE-DOES> ] 2 + ; -> }t
+t{ PWEIRD: PW1 -> }t
+t{ ' PW1 >BODY -> HERE }t
+t{ PW1 -> HERE 1 + }t
+t{ PW1 -> HERE 2 + }t
+
+TESTING POSTPONE ELSE
+: POSTPONE-ELSE
+ POSTPONE ELSE ;
+
+t{ : PELSE1 IF 123 [ POSTPONE-ELSE ] 234 THEN ; -> }t
+t{ 0 PELSE1 -> 234 }t
+t{ 1 PELSE1 -> 123 }t
+
+t{ : PELSE2 BEGIN DUP 2 > WHILE DUP 5 < WHILE DUP 1+ REPEAT 123 [ POSTPONE-ELSE ] 345 THEN ; -> }t
+t{ 1 PELSE2 -> 1 345 }t
+t{ 2 PELSE2 -> 2 345 }t
+t{ 3 PELSE2 -> 3 4 5 123 }t
+t{ 4 PELSE2 -> 4 5 123 }t
+t{ 5 PELSE2 -> 5 123 }t
+
+TESTING POSTPONE IF
+: POSTPONE-IF
+ POSTPONE IF ;
+
+t{ : PIF1 [ POSTPONE-IF ] 123 THEN ; -> }t
+t{ : PIF2 [ POSTPONE-IF ] 123 ELSE 234 THEN ; -> }t
+t{ 0 PIF1 -> }t
+t{ 1 PIF1 -> 123 }t
+t{ -1 PIF1 -> 123 }t
+t{ 0 PIF2 -> 234 }t
+t{ 1 PIF2 -> 123 }t
+t{ -1 PIF1 -> 123 }t
+
+t{ : PIF6 ( N -- 0,1,..N ) DUP [ POSTPONE-IF ] DUP >R 1- RECURSE R> THEN ; -> }t
+t{ 0 PIF6 -> 0 }t
+t{ 1 PIF6 -> 0 1 }t
+t{ 2 PIF6 -> 0 1 2 }t
+t{ 3 PIF6 -> 0 1 2 3 }t
+t{ 4 PIF6 -> 0 1 2 3 4 }t
+
+TESTING POSTPONE LITERAL
+: POSTPONE-LITERAL
+ POSTPONE LITERAL ;
+
+t{ : PLIT [ 42 POSTPONE-LITERAL ] ; -> }t
+t{ PLIT -> 42 }t
+
+TESTING POSTPONE LOOP
+: POSTPONE-LOOP
+ POSTPONE LOOP ;
+
+t{ : PLOOP1 DO I [ POSTPONE-LOOP ] ; -> }t
+t{ 4 1 PLOOP1 -> 1 2 3 }t
+t{ 2 -1 PLOOP1 -> -1 0 1 }t
+t{ MID-UINT+1 MID-UINT PLOOP1 -> MID-UINT }t
+
+t{ : PLOOP3 DO 1 0 DO J [ POSTPONE-LOOP ] [ POSTPONE-LOOP ] ; -> }t
+t{ 4 1 PLOOP3 -> 1 2 3 }t
+t{ 2 -1 PLOOP3 -> -1 0 1 }t
+t{ MID-UINT+1 MID-UINT PLOOP3 -> MID-UINT }t
+
+t{ : PLOOP4 DO 1 0 DO J [ POSTPONE-LOOP ] -1 +LOOP ; -> }t
+t{ 1 4 PLOOP4 -> 4 3 2 1 }t
+t{ -1 2 PLOOP4 -> 2 1 0 -1 }t
+t{ MID-UINT MID-UINT+1 PLOOP4 -> MID-UINT+1 MID-UINT }t
+
+t{ : PLOOP5 123 SWAP 0 DO I 4 > IF DROP 234 LEAVE THEN [ POSTPONE-LOOP ] ; -> }t
+t{ 1 PLOOP5 -> 123 }t
+t{ 5 PLOOP5 -> 123 }t
+t{ 6 PLOOP5 -> 234 }t
+
+t{ : PLOOP6 ( PAT: {0 0},{0 0}{1 0}{1 1},{0 0}{1 0}{1 1}{2 0}{2 1}{2 2} )
+ 0 SWAP 0 DO
+ I 1+ 0 DO I J + 3 = IF I UNLOOP I UNLOOP EXIT THEN 1+ [ POSTPONE-LOOP ]
+ [ POSTPONE-LOOP ] ; -> }t
+t{ 1 PLOOP6 -> 1 }t
+t{ 2 PLOOP6 -> 3 }t
+t{ 3 PLOOP6 -> 4 1 2 }t
+
+TESTING POSTPONE POSTPONE
+: POSTPONE-POSTPONE
+ POSTPONE POSTPONE ;
+
+t{ : PPP1 123 ; -> }t
+t{ : PPP4 [ POSTPONE-POSTPONE PPP1 ] ; IMMEDIATE -> }t
+t{ : PPP5 PPP4 ; -> }t
+t{ PPP5 -> 123 }t
+t{ : PPP6 345 ; IMMEDIATE -> }t
+t{ : PPP7 [ POSTPONE-POSTPONE PPP6 ] ; -> }t
+t{ PPP7 -> 345 }t
+
+TESTING POSTPONE RECURSE
+: POSTPONE-RECURSE
+ POSTPONE RECURSE ;
+
+t{ : GREC ( N -- 0,1,..N ) DUP IF DUP >R 1- [ POSTPONE-RECURSE ] R> THEN ; -> }t
+t{ 0 GREC -> 0 }t
+t{ 1 GREC -> 0 1 }t
+t{ 2 GREC -> 0 1 2 }t
+t{ 3 GREC -> 0 1 2 3 }t
+t{ 4 GREC -> 0 1 2 3 4 }t
+
+TESTING POSTPONE REPEAT
+: POSTPONE-REPEAT
+ POSTPONE REPEAT ;
+
+t{ : PREP3 BEGIN DUP 5 < WHILE DUP 1+ [ POSTPONE-REPEAT ] ; -> }t
+t{ 0 PREP3 -> 0 1 2 3 4 5 }t
+t{ 4 PREP3 -> 4 5 }t
+t{ 5 PREP3 -> 5 }t
+t{ 6 PREP3 -> 6 }t
+
+t{ : PREP5 BEGIN DUP 2 > WHILE DUP 5 < WHILE DUP 1+ [ POSTPONE-REPEAT ] 123 ELSE 345 THEN ; -> }t
+t{ 1 PREP5 -> 1 345 }t
+t{ 2 PREP5 -> 2 345 }t
+t{ 3 PREP5 -> 3 4 5 123 }t
+t{ 4 PREP5 -> 4 5 123 }t
+t{ 5 PREP5 -> 5 123 }t
+
+TESTING POSTPONE S"
+: POSTPONE-S"
+ POSTPONE S" ;
+
+t{ : PSQ4 [ POSTPONE-S" XY" ] ; -> }t
+t{ PSQ4 SWAP DROP -> 2 }t
+t{ PSQ4 DROP DUP C@ SWAP CHAR+ C@ -> 58 59 }t
+
+TESTING POSTPONE THEN
+: POSTPONE-THEN
+ POSTPONE THEN ;
+
+t{ : PTH1 IF 123 [ POSTPONE-THEN ] ; -> }t
+t{ : PTH2 IF 123 ELSE 234 [ POSTPONE-THEN ] ; -> }t
+t{ 0 PTH1 -> }t
+t{ 1 PTH1 -> 123 }t
+t{ -1 PTH1 -> 123 }t
+t{ 0 PTH2 -> 234 }t
+t{ 1 PTH2 -> 123 }t
+t{ -1 PTH1 -> 123 }t
+
+t{ : PTH5 BEGIN DUP 2 > WHILE DUP 5 < WHILE DUP 1+ REPEAT 123 ELSE 345 [ POSTPONE-THEN ] ; -> }t
+t{ 1 PTH5 -> 1 345 }t
+t{ 2 PTH5 -> 2 345 }t
+t{ 3 PTH5 -> 3 4 5 123 }t
+t{ 4 PTH5 -> 4 5 123 }t
+t{ 5 PTH5 -> 5 123 }t
+
+t{ : PTH6 ( N -- 0,1,..N ) DUP IF DUP >R 1- RECURSE R> [ POSTPONE-THEN ] ; -> }t
+t{ 0 PTH6 -> 0 }t
+t{ 1 PTH6 -> 0 1 }t
+t{ 2 PTH6 -> 0 1 2 }t
+t{ 3 PTH6 -> 0 1 2 3 }t
+t{ 4 PTH6 -> 0 1 2 3 4 }t
+
+TESTING POSTPONE UNTIL
+: POSTPONE-UNTIL
+ POSTPONE UNTIL ;
+
+t{ : PUNT4 BEGIN DUP 1+ DUP 5 > [ POSTPONE-UNTIL ] ; -> }t
+t{ 3 PUNT4 -> 3 4 5 6 }t
+t{ 5 PUNT4 -> 5 6 }t
+t{ 6 PUNT4 -> 6 7 }t
+
+TESTING POSTPONE WHILE
+: POSTPONE-WHILE
+ POSTPONE WHILE ;
+
+t{ : PWH3 BEGIN DUP 5 < [ POSTPONE-WHILE ] DUP 1+ REPEAT ; -> }t
+t{ 0 PWH3 -> 0 1 2 3 4 5 }t
+t{ 4 PWH3 -> 4 5 }t
+t{ 5 PWH3 -> 5 }t
+t{ 6 PWH3 -> 6 }t
+
+t{ : PWH5 BEGIN DUP 2 > [ POSTPONE-WHILE ] DUP 5 < [ POSTPONE-WHILE ] DUP 1+ REPEAT 123 ELSE 345 THEN ; -> }t
+t{ 1 PWH5 -> 1 345 }t
+t{ 2 PWH5 -> 2 345 }t
+t{ 3 PWH5 -> 3 4 5 123 }t
+t{ 4 PWH5 -> 4 5 123 }t
+t{ 5 PWH5 -> 5 123 }t
+
+
+TESTING POSTPONE [
+: POSTPONE-[
+ POSTPONE [ ;
+
+t{ HERE POSTPONE-[ -> HERE }t
+
+TESTING POSTPONE [']
+: POSTPONE-[']
+ POSTPONE ['] ;
+
+t{ : PTICK1 123 ; -> }t
+t{ : PTICK2 [ POSTPONE-['] PTICK1 ] ; IMMEDIATE -> }t
+t{ PTICK2 EXECUTE -> 123 }t
+
+TESTING POSTPONE [CHAR]
+: POSTPONE-[CHAR]
+ POSTPONE [CHAR] ;
+
+t{ : PCHAR1 [ POSTPONE-[CHAR] X ] ; -> }t
+t{ : PCHAR2 [ POSTPONE-[CHAR] HELLO ] ; -> }t
+t{ PCHAR1 -> 58 }t
+t{ PCHAR2 -> 48 }t
+