Add conversion for named tuple (#66)

* Add conversion for named tuple

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: hoodmane

type-generation/src/astToIR.ts

@@ -717,7 +717,12 @@ export class Converter {
       return arrayType(eltType);
     }
     if (Node.isTupleTypeNode(typeNode)) {
-      const elts = typeNode.getElements().map((elt) => this.typeToIR(elt));
+      const elts = typeNode.getElements().map((elt) => {
+        if (Node.isNamedTupleMember(elt)) {
+          return this.typeToIR(elt.getTypeNode());
+        }
+        return this.typeToIR(elt);
+      });
       return tupleType(elts);
     }
     if (Node.isTypePredicate(typeNode)) {

type-generation/tests/a.test.ts

@@ -1783,6 +1783,20 @@ describe("emit", () => {
       );
     });
   });
+  it("named tuple", () => {
+    const res = emitFile(`
+      declare var x: [
+        key: string,
+        value: string
+      ];
+    `);
+    assert.strictEqual(
+      removeTypeIgnores(res.slice(1).join("\n\n")),
+      dedent(`
+        x: tuple[str, str] = ...
+      `).trim(),
+    );
+  });
   describe("adjustments", () => {
     it("setTimeout", () => {
       const res = emitIRNoTypeIgnores(convertBuiltinFunction("setTimeout"));