Allow transpiling template literals (#36)

* allow transpiling template literals

* fix test case

Author: TheLartians

package.json

@@ -47,7 +47,8 @@
     "build": "babel --extensions .ts --ignore '**/*.test.ts' ./src -d dist --source-maps",
     "test": "jest",
     "typecheck": "tsc -p . --noEmit",
-    "prepack": "yarn build"
+    "prepack": "yarn build",
+    "typescript2python": "yarn --silent single src/index.ts"
   },
   "bin": {
     "typescript2python": "./dist/index.js"

src/parseInlineType.ts

@@ -62,6 +62,10 @@ export const tryToParseInlineType = (
       // TODO: figure out why we reach this and replace with correct type definition
       return `object`;
     }
+  } else if (type.flags & TypeFlags.TemplateLiteral) {
+    // there is no way to represent template literals in Python,
+    // so we fallback to string
+    return "str";
   } else {
     // assume interface or object, we need to create a helper type
     if (!globalScope) {

src/parseTypeDefinition.ts

@@ -1,4 +1,4 @@
-import ts from "typescript";
+import ts, { TypeFlags } from "typescript";
 import { ParserState } from "./ParserState";
 import { getDocumentationStringForDict, parseProperty, parsePropertyForDict } from "./parseProperty";
 import { getDocumentationStringForType } from "./getDocumentationStringForType";

src/testing/basic.test.ts

@@ -62,6 +62,7 @@ describe("transpiling basic types", () => {
       // without strict mode the `undefined` gets lost here
       "T = float",
     ],
+    ["export type T = `a.b.${string}`", "T = str"],
   ])("transpiles %p to %p", async (input, expected) => {
     const result = await transpileString(input);
     expect(result).toEqual(expected);