Add "Inline variable" refactoring

[DanielSWolf]

VSCode offers several "Extract to constant" refactorings that move a literal value into a constant. I often need the reverse operation: inlining a value that is currently defined in a constant.

Here are some examples.

// Before:
function add(a: number, b: number) {
  const result = a + b;
  return result;
}

// After inlining `result`:
function add(a: number, b: number) {
  return a + b;
}

// Before:
const message = 'Processing successful.';
console.log(message);

// After inlining `message`:
console.log('Processing successful.');

For reference, here is the documentation of that feature in ReSharper.

[JacksonKearl]

Please file a request on TypeScript: https://github.com/microsoft/TypeScript/

[DanielSWolf]

@JacksonKearl Thank you for your fast reply! I'm a bit confused, though. It is my understanding that the code for "Extract to constant" is part of this repository, not TypeScript. Am I missing something?

[mjbvz]

Duplicate of microsoft/TypeScript#18459