hopefully complete and correct typechecker in PGF

testsuite/runtime/eval/eval.gfs.gold

@@ -1,30 +1,26 @@
-\v0 -> v0 1␍
+\x -> x 1␍
 ␍
-? 1␍
+?1 1␍
 ␍
-? 1␍
+?3 1␍
 ␍
-unknown variable unknown_var␍
-unknown variable unknown_var␍
-literal of function type␍
 f 1 2␍
 ␍
-\v0 -> v0␍
+\x -> x␍
 ␍
-?666␍
+?1␍
 ␍
 f␍
 ␍
 f 1 2␍
 ␍
-literal of function type␍
 2␍
 ␍
 g 0␍
 ␍
-\v0 -> g v0␍
+\x -> g x␍
 ␍
-g ?␍
+g ?1␍
 ␍
 5␍
 ␍
@@ -32,29 +28,29 @@ g ?
 ␍
 g2␍
 ␍
-f 3.2␍
+f 32␍
 ␍
-g2 2.3␍
-␍
-g2 (f 0) 1␍
+g2 23␍
 ␍
 3.14␍
 ␍
 succ zero␍
 ␍
-?␍
+?1␍
 ␍
-\v0 -> dec v0␍
+\x -> dec x␍
 ␍
-dec ?␍
+dec ?1␍
 ␍
-g3 ? 0␍
+g3 ?3 0␍
 ␍
-g (g2 ? 0)␍
+g (g2 ?1 0)␍
 ␍
 succ (succ zero)␍
 ␍
 zero␍
 ␍
+dec2 0 err␍
+␍
 succ err␍
 ␍