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@ -547,9 +547,20 @@ a `$` literally, including delimiters. For parsing reasons, delimiters must be
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balanced, but they are otherwise not special.
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In the matcher, `$` _name_ `:` _designator_ matches the nonterminal in the Rust
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syntax named by _designator_. Valid designators are `item`, `block`, `stmt`,
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`pat`, `expr`, `ty` (type), `ident`, `path`, `tt` (either side of the `=>`
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in macro rules), and `meta` (contents of an attribute). In the transcriber, the
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syntax named by _designator_. Valid designators are:
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* `item`: an [item](#items)
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* `block`: a [block](#block-expressions)
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* `stmt`: a [statement](#statements)
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* `pat`: a [pattern](#match-expressions)
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* `expr`: an [expression](#expressions)
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* `ty`: a [type](#types)
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* `ident`: an [identifier](#identifiers)
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* `path`: a [path](#paths)
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* `tt`: either side of the `=>` in macro rules
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* `meta`: the contents of an [attribute](#attributes)
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In the transcriber, the
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designator is already known, and so only the name of a matched nonterminal comes
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after the dollar sign.
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