X-Git-Url: http://git.lukelau.me/?p=scheme.git;a=blobdiff_plain;f=typecheck.scm;h=7eb4fa96606d786b5e58d17f2d2601f4f52c85a3;hp=46fddfec7008bbf6e05c637368571b6ed2f71563;hb=91145e54f41ee88f1e279a80430b3f5ed4e7a8c6;hpb=25a4c23da2d76f3bb951d01b1c3175be80441a0a

diff --git a/typecheck.scm b/typecheck.scm
index 46fddfe..7eb4fa9 100644
--- a/typecheck.scm
+++ b/typecheck.scm
@@ -10,6 +10,7 @@
   (case t
     ('int #t)
     ('bool #t)
+    ('void #t)
     (else #f)))
 
 (define (pretty-type t)
@@ -74,6 +75,7 @@
     ('! '(abs bool bool))
     ('= '(abs int (abs int bool)))
     ('bool->int '(abs bool int))
+    ('print '(abs string void))
     (else #f)))
 
 ; we typecheck the lambda calculus only (only single arg lambdas)
@@ -89,6 +91,7 @@
 	  (case (ast-type x)
 	   ('int-literal (list '() 'int))
 	   ('bool-literal (list '() 'bool))
+	   ('string-literal (list '() 'string))
 	   ('builtin (list '() (builtin-type x)))
 
 	   ('if