add day 19

Author: zyhou

2024/19/index.ts

@@ -0,0 +1,83 @@
+import type { Expect, Equal } from "type-testing";
+
+type Parse<T> = T extends `${" " | "\n" | "\t" | "\r"}${infer Tail}`
+  ? Parse<Tail>
+  : T extends `${string} ${infer Id} = "${string}";${infer Tail}`
+    ? [{ id: Id; type: "VariableDeclaration" }, ...Parse<Tail>]
+    : T extends `${string}(${infer Argument});${infer Tail}`
+      ? [{ argument: Argument; type: "CallExpression" }, ...Parse<Tail>]
+      : [];
+
+// ------------------- Test section ---------------------
+
+type t0_actual = Parse<`
+let teddyBear = "standard_model";
+`>;
+type t0_expected = [
+  {
+    id: "teddyBear";
+    type: "VariableDeclaration";
+  },
+];
+type t0 = Expect<Equal<t0_actual, t0_expected>>;
+
+type t1_actual = Parse<`
+buildToy(teddyBear);
+`>;
+type t1_expected = [
+  {
+    argument: "teddyBear";
+    type: "CallExpression";
+  },
+];
+type t1 = Expect<Equal<t1_actual, t1_expected>>;
+
+type t2_actual = Parse<`
+let robotDog = "deluxe_model";
+assembleToy(robotDog);
+`>;
+type t2_expected = [
+  {
+    id: "robotDog";
+    type: "VariableDeclaration";
+  },
+  {
+    argument: "robotDog";
+    type: "CallExpression";
+  },
+];
+type t2 = Expect<Equal<t2_actual, t2_expected>>;
+
+type t3_actual = Parse<`
+  const giftBox = "premium_wrap";
+    var ribbon123 = "silk";
+
+  \t
+  wrapGift(giftBox);
+  \r\n
+      addRibbon(ribbon123);
+`>;
+type t3_expected = [
+  {
+    id: "giftBox";
+    type: "VariableDeclaration";
+  },
+  {
+    id: "ribbon123";
+    type: "VariableDeclaration";
+  },
+  {
+    argument: "giftBox";
+    type: "CallExpression";
+  },
+  {
+    argument: "ribbon123";
+    type: "CallExpression";
+  },
+];
+type t3 = Expect<Equal<t3_actual, t3_expected>>;
+
+type t4_input = "\n\t\r \t\r ";
+type t4_actual = Parse<t4_input>;
+type t4_expected = [];
+type t4 = Expect<Equal<t4_actual, t4_expected>>;