X-Git-Url: https://git.lukelau.me/?p=scheme.git;a=blobdiff_plain;f=typecheck.scm;h=d180e44e92e755f1e4fbb4172f3535e70f8ebb24;hp=35e818866df9603a3ecaa4cc721b548035d26abc;hb=8e106ca13666680051f91ab3f49ce2bd7e19ead7;hpb=86531822ef58c5b29751976f5b41d1c631bdd459

diff --git a/typecheck.scm b/typecheck.scm
index 35e8188..d180e44 100644
--- a/typecheck.scm
+++ b/typecheck.scm
@@ -259,7 +259,8 @@
 
 					; we typecheck the lambda calculus only (only single arg lambdas)
 (define (typecheck prog)
-  (cadr (check (init-adts-env prog) (normalize (program-body prog)))))
+  (let ([expanded (expand-pattern-matches prog)])
+    (cadr (check (init-adts-env expanded) (normalize (program-body expanded))))))
 
 
 					; before passing annotated types onto codegen
@@ -309,8 +310,11 @@
 
 (define ann-expr car)
 (define ann-type caddr)
+
+					; prerequisites: expand-pattern-matches
 (define (annotate-types prog)
-  (denormalize (program-body prog)
+  (denormalize
+   (program-body prog)
    (caddr (check (init-adts-env prog) (normalize (program-body prog))))))