X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=blobdiff_plain;f=scheme.4th;h=19848b60409e957933ac482f72e87dc803f7a6b2;hb=af4ada618d8d096645f783f40508a1bd6ad0d95d;hp=52ce34625049b8521453aefadd27548d56d06578;hpb=46a8d1c9a93efc50d4da538cba460faa1b29d602;p=scheme.forth.jl.git

diff --git a/scheme.4th b/scheme.4th
index 52ce346..19848b6 100644
--- a/scheme.4th
+++ b/scheme.4th
@@ -277,41 +277,37 @@ global-env setobj
     global-env fetchobj define-var
 ;
 
-( = Arithmeic = )
+: arg-count-error
+            bold fg red ." Incorrect argument count." reset-term cr
+            abort
+;
 
-: add-prim ( 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
-        2dup car drop
-        -rot cdr recurse drop
-        + fixnum-type
+        -rot 2dup nil objeq? if
+            arg-count-error
+        then
+        
+        cdr rot 1- recurse
     then
 ;
-' add-prim make-primitive +
 
-:noname ( args -- )
-    2dup nil objeq? if
-        2drop
-        0 fixnum-type
-    else
-        2dup car drop
-        -rot cdr add-prim drop
-        - fixnum-type
-    then
-; make-primitive -
+: arg-type-error
+            bold fg red ." Incorrect argument type." reset-term cr
+            abort
+;
 
-:noname ( args -- )
-    2dup nil objeq? if
-        2drop
-        1 fixnum-type
-    else
-        2dup car drop
-        -rot cdr recurse drop
-        * fixnum-type
+: ensure-arg-type ( arg type -- arg )
+    istype? false = if
+        arg-type-error
     then
-; make-primitive *
+;
+
+include scheme-primitives.4th
 
 \ }}}
 
@@ -397,8 +393,11 @@ parse-idx-stack parse-idx-sp !
 : minus? ( -- bool )
     nextchar [char] - = ;
 
+: plus? ( -- bool )
+    nextchar [char] + = ;
+
 : fixnum? ( -- bool )
-    minus? if
+    minus? plus? or if
         inc-parse-idx
 
         delim? if
@@ -497,8 +496,11 @@ parse-idx-stack parse-idx-sp !
     nextchar [char] " = ;
 
 : readnum ( -- num-atom )
-    minus? dup if
+    plus? minus? or if
+        minus?
         inc-parse-idx
+    else
+        false
     then
 
     0