Annotation of gforth/wordinfo.fs, revision 1.7
1.1 anton 1: \ WORDINFO.FS V1.0 17may93jaw
2:
3: \ May be cross-compiled
4: \ If you want check values then exclude comments,
5: \ but keep in mind that this can't be cross-compiled
6:
7: INCLUDE look.fs
8:
9: \ Wordinfo is a tool that checks a nfa
10: \ and finds out what wordtype we have
11: \ it is used in SEE.FS
12:
13: : alias? ( nfa -- flag )
14: dup name> look
15: 0= ABORT" WINFO: CFA not found"
1.4 pazsan 16: \ cell+
1.1 anton 17: 2dup <>
18: IF nip dup 1 cells - here !
19: count $1f and here cell+ place true
20: ELSE 2drop false THEN ;
21:
22: : var? ( nfa -- flag )
1.7 ! anton 23: cell+ (name>) >code-address dovar: = ;
1.1 anton 24:
25: : con? ( nfa -- flag )
1.7 ! anton 26: cell+ (name>) >code-address docon: = ;
1.1 anton 27:
1.5 pazsan 28: : user? ( nfa -- flag )
1.7 ! anton 29: cell+ (name>) >code-address douser: = ;
1.5 pazsan 30:
1.1 anton 31: : does? ( nfa -- flag )
1.7 ! anton 32: \ !! does not work on all installations
! 33: cell+ (name>)
! 34: >code-address ['] bits >code-address = ;
1.1 anton 35:
36: : defered? ( nfa -- flag )
1.7 ! anton 37: cell+ (name>) >code-address dodefer: = ;
1.1 anton 38:
39: : colon? ( nfa -- flag )
1.7 ! anton 40: cell+ (name>) >code-address docol: = ;
! 41:
! 42: \ the above words could be factored with create-does>, but this would
! 43: \ probably make this file incompatible with cross.
1.1 anton 44:
45: \ VALUE VCheck
46:
47: \ : value? ( nfa -- flag )
48: \ dup does?
49: \ IF here @ ['] VCheck cell+ @ =
50: \ dup IF swap (name>) >body @ here ! ELSE nip THEN
51: \ ELSE drop false THEN ;
52:
53: : prim? ( nfa -- flag )
54: name>
55: forthstart u< ;
56:
57: \ None nestable IDs:
58:
59: 1 CONSTANT Pri# \ Primitives
60: 2 CONSTANT Con# \ Constants
61: 3 CONSTANT Var# \ Variables
62: 4 CONSTANT Val# \ Values
63:
64: \ Nestabe IDs:
65:
66: 5 CONSTANT Doe# \ Does part
67: 6 CONSTANT Def# \ Defer
68: 7 CONSTANT Col# \ Colon def
1.5 pazsan 69: 8 CONSTANT Use# \ User variable
1.1 anton 70:
71: \ Nobody knows:
72:
1.5 pazsan 73: 9 CONSTANT Ali# \ Alias
1.1 anton 74:
1.5 pazsan 75: 10 CONSTANT Str# \ Structure words
1.1 anton 76:
1.5 pazsan 77: 11 CONSTANT Com# \ Compiler directives : ; POSTPONE
1.1 anton 78:
79: CREATE InfoTable
1.5 pazsan 80: ' Prim? A, Pri# ,
81: ' Alias? A, Ali# ,
82: ' Con? A, Con# ,
83: ' Var? A, Var# ,
84: \ ' Value? A, Val# ,
1.1 anton 85: ' Defered? A, Def# ,
1.5 pazsan 86: ' Does? A, Doe# ,
87: ' Colon? A, Col# ,
88: ' User? A, Use# ,
1.1 anton 89: 0 ,
90:
91: : WordInfo ( nfa --- code )
92: InfoTable
93: BEGIN dup @ dup
94: WHILE swap 2 cells + swap
95: 2 pick swap execute
96: UNTIL
97: 1 cells - @ nip
98: ELSE
99: 2drop drop 0
100: THEN ;
101:
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>