Confusing label ast

[pasa]

There are plenty of such test in label parsing tests:

LABEL@[31; 34)
    LIFETIME@[31; 33) "\'b"
    COLON@[33; 34) ":"

This is confusing. because 'b is not a lifetime. I guess IDENT will fit here much better.

[bjorn3]

Rustc's libsyntax internally parses a lifetime and then removes the ' returning an ident + span. ra_syntax can't remove the ', as every single char in the input file must have a node in the concrete syntax tree ra_syntax creates.

[matklad]

Are there better names for 'ident token? It seems like “lifetime” is the best one, although it is confusing if used for labels

[kiljacken]

When using it to refer to both lifetimes and labels one could always go with "region", but I'm afraid that might be bit to "theoretical" for some folks.

[matklad]

Hm, I must say, I like @kiljacken suggestion in principle, but, in practice, I'd prefer a less jargony lifetime.