From: Tim Vaughan <tgvaughan@gmail.com>
Date: Fri, 22 Jul 2016 08:24:35 +0000 (+1200)
Subject: Added define syntax for procedure generation.
X-Git-Url: https://thelambdalab.xyz/gitweb/index.cgi?a=commitdiff_plain;h=a5871b187b34ca1eaf925658c1bc49a547593396;p=scheme.forth.jl.git

Added define syntax for procedure generation.
---

diff --git a/scheme.4th b/scheme.4th
index 9a2a3ca..7fa85ac 100644
--- a/scheme.4th
+++ b/scheme.4th
@@ -817,11 +817,23 @@ defer eval
 : definition? ( obj -- obj bool )
     define-symbol tagged-list? ;
 
+: make-lambda ( params body -- lambda-exp )
+    lambda-symbol -2rot cons cons ;
+
 : definition-var ( obj -- var )
-    cdr car ;
+    cdr car
+    symbol-type istype? false = if car then
+;
 
 : definition-val ( obj -- val )
-    cdr cdr car ;
+    2dup cdr car symbol-type istype? if
+        2drop
+        cdr cdr car
+    else
+        cdr 2swap cdr cdr
+        make-lambda
+    then
+;
 
 : assignment? ( obj -- obj bool )
     set!-symbol tagged-list? ;
@@ -940,7 +952,9 @@ defer eval
             endof
 
             compound-proc-type of
-                ." Compound procedures not yet implemented."
+                2drop 2drop
+                ." Compound procedures not yet implemented." cr
+                ok-symbol
             endof
 
             bold fg red ." Object not applicable. Aboring." reset-term cr
@@ -992,8 +1006,8 @@ defer eval
     then
 
     lambda? if
-        2dup lambda-body
-        2swap lambda-parameters
+        2dup lambda-parameters
+        2swap lambda-body
         2rot make-procedure
         exit
     then