rust/comprehensive-rust
1
0
Fork 0
mirror of https://github.com/google/comprehensive-rust.git synced 2025-10-31 08:37:45 +02:00
Code Issues Releases Activity

Update match-guards.md

Browse Source
This commit is contained in:
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
Download Patch File Download Diff File Expand all files Collapse all files

11
src/pattern-matching/match-guards.md
View File

@@ -9,11 +9,10 @@ expression which will be executed if the pattern matches:
<details>
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
Key Points:
* 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
of the original `match` expression being considered.
* You can use the variables defined in the pattern in your if expression.
* The condition defined in the guard applies to every expression in a pattern with an `|`.
</details>