`<Lifetime as ToTokens>` is missing the apostrophe about syn

[dtolnay]

This syn::Generics includes a syn::Lifetime that you created yourself right? It looks like the Lifetimes parsed by syn always include the apostrophe.

I want the apostrophe to be included in the Lifetime name because this is how libsyntax does it. Here is what I did to check:

Create main.rs:

fn f<'a>() {}

Run rustc -Z ast-json main.rs. The following appears in the output:

"lifetimes": [
  {
    "attrs": {
      "_field0": null
    },
    "lifetime": {
      "id": 5,
      "span": {
        "lo": 5,
        "hi": 7
      },
      "name": "'a"
    },
    "bounds": []
  }
],

The lifetime is "'a" not just "a".

Can you think of a better way to handle this? Maybe it should panic if there is a lifetime that does not start with apostrophe? Or maybe add the apostrophe if one is missing? Or maybe just document that user is responsible for the apostrophe?

[mcarton]

Ah! I never noticed the lifetime name included the '. syn behavior seems legit then.
Some documentation would be enough I guess. Maybe a panic in syn::Lifetime::new if there is no '.
Thanks!