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Added predicate primitives.
[scheme.forth.jl.git]
/
scheme.4th
diff --git
a/scheme.4th
b/scheme.4th
index
52ce346
..
1953cf9
100644
(file)
--- a/
scheme.4th
+++ b/
scheme.4th
@@
-277,41
+277,26
@@
global-env setobj
global-env fetchobj define-var
;
global-env fetchobj define-var
;
-( = Arithmeic = )
-
-: add-prim ( args -- )
- 2dup nil objeq? if
- 2drop
- 0 fixnum-type
- else
- 2dup car drop
- -rot cdr recurse drop
- + fixnum-type
- then
+: arg-count-error
+ bold fg red ." Incorrect argument count." reset-term cr
+ abort
;
;
-' add-prim make-primitive +
-:noname ( args -- )
- 2dup nil objeq? if
- 2drop
- 0 fixnum-type
+: ensure-arg-count ( args n -- )
+ dup 0= if
+ drop nil objeq? false = if
+ arg-count-error
+ then
else
else
- 2dup car drop
- -rot cdr add-prim drop
- - fixnum-type
+ -rot 2dup nil objeq? if
+ arg-count-error
+ then
+
+ cdr rot 1- recurse
then
then
-;
make-primitive -
+;
-:noname ( args -- )
- 2dup nil objeq? if
- 2drop
- 1 fixnum-type
- else
- 2dup car drop
- -rot cdr recurse drop
- * fixnum-type
- then
-; make-primitive *
+include scheme-primitives.4th
\ }}}
\ }}}