Add documentation for meta variable expressions #1485
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| @@ -195,6 +195,220 @@ compiler knows how to expand them properly: | |||
| not have the same number. This requirement applies to every layer of nested | |||
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| ## Meta variable expressions | |||
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"Meta variable" should be "metavariable" for consistency with everything else. Ditto for all other appearances of the phrase.
| @@ -195,6 +195,220 @@ compiler knows how to expand them properly: | |||
| not have the same number. This requirement applies to every layer of nested | |||
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| ## Meta variable expressions | |||
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| Give access to additional metadata about meta variables that otherwise would be difficult or even impossible to get through elements such as `count` or `index`. | |||
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elements such as
countorindex.
The wording implies that count and index are "elements" through which it would be difficult or impossible to get metadata, but presumably that's not the intention.
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| ### length(depth) |
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Bikeshedding, but should consider changing the name to "len". Length is abbreviated to "len" everywhere in std; there is only a single, unstable, API that uses "length".
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@jdahlstrom you may want to bring that up on the implementation PR, currently under FCP proposal rust-lang/rust#122808
ehuss
added
the
S-waiting-on-stabilization
Requested in rust-lang/rust#122808