wip: abstract stack/continuation machine

gyehoek.cabal

@@ -61,6 +61,8 @@ library
     Gyehoek.Options
     Gyehoek.Scheme.Syntax
     Gyehoek.Sexp
+    Gyehoek.Stack.Syntax
+    Gyehoek.Stack.VM
     Gyehoek.Wasm
 
   build-depends:
@@ -100,16 +102,21 @@ test-suite test
   type:             exitcode-stdio-1.0
   hs-source-dirs:   test
   main-is:          Main.hs
+
+  -- cabal-fmt: expand test
   other-modules:
     Gyehoek.Test.CPS.Syntax
     Gyehoek.Test.Golden
     Gyehoek.Test.Sexp
+    Gyehoek.Test.Stack.VM
 
   build-depends:
     , base
     , directory
     , filepath
+    , generic-lens
     , gyehoek
+    , lens
     , process-extras
     , sexp-grammar
     , tasty