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Update match-guards.md

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Charisee Chiw
2023-01-23 18:25:06 -08:00
committed by Andrew Walbran
parent a0a1059c0d
commit 4588d95427
1 changed files with 6 additions and 7 deletions
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src/pattern-matching/match-guards.md
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@ -9,11 +9,10 @@ expression which will be executed if the pattern matches:
<details> <details>
Match guards as a separate syntax feature are important and necessary. They are not Key Points:
the same as separate `if` expression inside of the match arm. * Match guards as a separate syntax feature are important and necessary.
* They are not the same as separate `if` expression inside of the match arm. An `if` expression inside of the branch block (after `=>`) happens after the match arm is selected. Failing the `if` condition inside of that block won't result in other arms
An `if` expression inside of the branch block (after `=>`) happens after the match arm of the original `match` expression being considered.
is selected. Failing the `if` condition inside of that block won't result in other arms * You can use the variables defined in the pattern in your if expression.
of the original `match` expression being considered. * The condition defined in the guard applies to every expression in a pattern with an `|`.
</details> </details>