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Fix misleading explanation of comma in $(),* #3800

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merged 2 commits into from
Dec 12, 2024
Merged

Fix misleading explanation of comma in $(),* #3800

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9509e74
Fix misleading explanation of comma in `$(),*`
pitaj Dec 22, 2023
fa7e1c3
Merge 'main' into 'pitaj:patch-1'
chriskrycho Dec 12, 2024
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5 changes: 3 additions & 2 deletions src/ch19-06-macros.md
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Expand Up @@ -119,8 +119,9 @@ for use in the replacement code. Within `$()` is `$x:expr`, which matches any
Rust expression and gives the expression the name `$x`.

The comma following `$()` indicates that a literal comma separator character
could optionally appear after the code that matches the code in `$()`. The `*`
specifies that the pattern matches zero or more of whatever precedes the `*`.
must appear between each instance of the code that matches the code within
`$()`. The `*` specifies that the pattern matches zero or more of whatever
precedes the `*`.

When we call this macro with `vec![1, 2, 3];`, the `$x` pattern matches three
times with the three expressions `1`, `2`, and `3`.
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