Bug Report

🔎 Search Terms

import equals declaration module reference keyword

🕗 Version & Regression Information

• This is the behavior in every version I tried, and I reviewed the FAQ for entries about import

⏯ Playground Link

Playground link with relevant code

💻 Code

Just for the syntax:

import X2 = Y.if;

A complete example:

// dep.ts
module A {}
export { A as if };

// main.ts
import * as T from "./dep"
import mod = T.if;

🙁 Actual behavior

This code throws that if is a reserved word, and produces a broken AST.

🙂 Expected behavior

That code should be allowed: if Y is a module namespace object that exports an if module, it's runtime behavior is well defined. If you rename if to anything else, it works.

Note that I didn't find this surprising ("surprising" because every other member expression in the language allows reserve words after .) restriction in real code, but while reading Babel's TypeScript parsing code.