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Add if let expressions example #25291

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May 11, 2015
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Add if let expressions example #25291

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Add if let expressions example
May 11, 2015
6a19046
Four spaces indent, rephrasing
May 11, 2015
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11 changes: 11 additions & 0 deletions src/doc/reference.md
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Expand Up @@ -3064,6 +3064,17 @@ of a condition expression it expects a refutable let statement. If the value of
expression on the right hand side of the let statement matches the pattern, the corresponding
block will execute, otherwise flow proceeds to the first `else` block that follows.

```
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if this example does not execute, it needs a rust,ignore after the triple ticks

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Does not execute simply means it will skip over the if block. It will still compile. If that's hard to understand I should probably rephrase it, what do you think?

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Ah, I see. How about saying "This body will not execute because the pattern is refuted"

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Sounds good! Will change

let dish = ("Ham", "Eggs");
if let ("Bacon", b) = dish { // will not execute because let is refuted
println!("Bacon is served with {}", b);
}
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four spaces

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(for indentation, sorry)


if let ("Ham", b) = dish { // will execute
println!("Ham is served with {}", b);
}
```

### While let loops

A `while let` loop is semantically identical to a `while` loop but in place of a
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