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yaml --- r: 95579 b: refs/heads/dist-snap c: b2b2095 h: refs/heads/master i: 95577: 26d9256 95575: ded3bb5 v: v3
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[refs]

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branches/dist-snap/doc/rust.md

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@@ -3395,16 +3395,23 @@ a [temporary](#lvalues-rvalues-and-temporaries), or a local variable.
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A _local variable_ (or *stack-local* allocation) holds a value directly,
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allocated within the stack's memory. The value is a part of the stack frame.
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Local variables are immutable unless declared with `let mut`. The
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`mut` keyword applies to all local variables declared within that
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declaration (so `let mut (x, y) = ...` declares two mutable variables, `x` and
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`y`).
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Local variables are immutable unless declared otherwise like: `let mut x = ...`.
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Function parameters are immutable unless declared with `mut`. The
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`mut` keyword applies only to the following parameter (so `|mut x, y|`
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and `fn f(mut x: ~int, y: ~int)` declare one mutable variable `x` and
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one immutable variable `y`).
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Methods that take either `self` or `~self` can optionally place them in a
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mutable slot by prefixing them with `mut` (similar to regular arguments):
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~~~
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trait Changer {
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fn change(mut self) -> Self;
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fn modify(mut ~self) -> ~Self;
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}
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~~~
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Local variables are not initialized when allocated; the entire frame worth of
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local variables are allocated at once, on frame-entry, in an uninitialized
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state. Subsequent statements within a function may or may not initialize the

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