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Merge pull request #1254 from stsewd/doc-wildcard-node

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Docs: document `_` wildcard node
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Max Brunsfeld 2021-07-11 09:58:39 -07:00 • committed by GitHub
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docs/section-2-using-parsers.md
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@ -586,8 +586,10 @@ This pattern would match a set of possible keyword tokens, capturing them as `@k
#### Wildcard Node
A wildcard node is represented with an underscore (`(_)`), it matches any node.
A wildcard node is represented with an underscore (`_`), it matches any node.
This is similar to `.` in regular expressions.
There are two types, `(_)` will match any named node,
and `_` will match any named or anonymous node.
For example, this pattern would match any node inside a call: