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Lexer: say that lifetime-like tokens can't be immediately followed by ' #1479

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Mar 6, 2024
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Lexer: say that lifetime-like tokens can't be immediately followed by ' #1479

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5 changes: 4 additions & 1 deletion src/tokens.md
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Original file line number Diff line number Diff line change
Expand Up @@ -630,11 +630,14 @@ Examples of reserved forms:

> **<sup>Lexer</sup>**\
> LIFETIME_TOKEN :\
> &nbsp;&nbsp; &nbsp;&nbsp; `'` [IDENTIFIER_OR_KEYWORD][identifier]\
> &nbsp;&nbsp; &nbsp;&nbsp; `'` [IDENTIFIER_OR_KEYWORD][identifier]
> _(not immediately followed by `'`)_\
> &nbsp;&nbsp; | `'_`
> _(not immediately followed by `'`)_
>
> LIFETIME_OR_LABEL :\
> &nbsp;&nbsp; &nbsp;&nbsp; `'` [NON_KEYWORD_IDENTIFIER][identifier]
> _(not immediately followed by `'`)_

Lifetime parameters and [loop labels] use LIFETIME_OR_LABEL tokens. Any
LIFETIME_TOKEN will be accepted by the lexer, and for example, can be used in
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