segregate parsing utilities

nt/primitives/parse/parse.nix

@@ -9,16 +9,19 @@
 
   inherit
     (this)
-    enfIsType
     is
-    Wrap
+    ;
+
+  inherit
+    (this.std)
+    enfIsAttrs
     ;
 in rec {
   # form: getAttrAt :: list string -> set -> null | Wrap Any
   # given path as a list of strings, return that value of an
   # attribute set at that path
   getAttrAt = path: xs:
-    assert enfIsType "set" xs "getAttrAt";
+    assert enfIsAttrs xs "getAttrAt";
       foldl' (left: right:
         if left != null && isAttrs left.value && hasAttr right left.value
         then Wrap left.value.${right}
@@ -30,7 +33,7 @@ in rec {
   # given path as a list of strings, return that value of an
   # attribute set at that path
   hasAttrAt = path: xs:
-    assert enfIsType "set" xs "hasAttrAt";
+    assert enfIsAttrs xs "hasAttrAt";
       getAttrAt path xs != null; # NOTE: inefficient (im lazy)
 
   # Alternative to mapAttrsRecursiveCond

nt/primitives/parse/sig.nix

@@ -1,18 +1,16 @@
 {this, ...}: let
   inherit
     (builtins)
-    isString
     split
     stringLength
+    typeOf
     ;
 
   inherit
-    (this)
-    enfIsNT
+    (this.std)
     filterEven
     init
     last
-    ntTrapdoorKey
     nullOr
     stringHead
     stringTail
@@ -34,6 +32,12 @@ in rec {
   isClassSig = sig:
     parseSig sig |> nullOr (result: last result |> isClassSig);
 
+  enfIsClassSig = sig: msg:
+    isClassSig sig || throw "${msg}: given value \"${toString sig}\" of primitive nix type \"${typeOf sig}\" is not a valid Typeclass signature";
+
+  enfIsTypeSig = sig: msg:
+    isTypeSig sig || throw "${msg}: given value \"${toString sig}\" of primitive nix type \"${typeOf sig}\" is not a valid Type signature";
+
   parseTypeSig = sig: let
     result = parseSig sig;
   in
@@ -48,17 +52,6 @@ in rec {
     then init result ++ (last result |> stringTail)
     else null;
 
-  # NOTE: unsafe variant, use typeSig if you can't guarantee `isNT T` holds
-  typeSig' = T: T.${ntTrapdoorKey}.sig;
-
-  # NOTE: safe variant, use typeSig' if you can guarantee `isNT T` holds
-  typeSig = T: assert enfIsNT T "nt.typeSig"; typeSig' T;
-
-  toTypeSig = x:
-    if isString x
-    then x
-    else typeSig x;
-
   # NOTE: we're testing how similar `list` is to `toTypeSig type` (non-commutative)
   # NOTE: we measure similarity in the reverse order (ie end of signature is most important)
   # sigSimilarity = type: list: let

nt/primitives/util/README.md

@@ -1 +0,0 @@
-

nt/primitives/util/default.nix

@@ -1,14 +1,7 @@
 {mix, ...} @ inputs:
 mix.newMixture inputs (mixture: {
   includes.public = [
-    ./enforce.nix
     ./nt.nix
-    ./null.nix
-    ./maybe.nix
-    ./parse.nix
-    ./sig.nix
     ./trapdoor.nix
-    ./util.nix
-    ./wrap.nix
   ];
 })

nt/primitives/util/enforce.nix

@@ -1,32 +0,0 @@
-{this, ...}: let
-  inherit
-    (builtins)
-    typeOf
-    ;
-
-  inherit
-    (this)
-    impls
-    isClassSig
-    isNT
-    isTypeSig
-    toTypeSig
-    ;
-in {
-  enfIsType = type: value: msg: let
-    got = typeOf value;
-  in
-    got == type || throw "${msg}: expected primitive nix type \"${type}\" but got \"${got}\"";
-
-  enfIsClassSig = sig: msg:
-    isClassSig sig || throw "${msg}: given value \"${toString sig}\" of primitive nix type \"${typeOf sig}\" is not a valid Typeclass signature";
-
-  enfIsTypeSig = sig: msg:
-    isTypeSig sig || throw "${msg}: given value \"${toString sig}\" of primitive nix type \"${typeOf sig}\" is not a valid Type signature";
-
-  enfIsNT = T: msg:
-    isNT T || throw "${msg}: expected nt compatible type but got \"${toString T}\" of primitive nix type \"${typeOf T}\"";
-
-  enfImpls = type: T: msg:
-    impls type T || throw "${msg}: given type \"${toTypeSig T}\" does not implement typeclass \"${toTypeSig type}\"";
-}