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- refs/heads/master: 92e52bc95e554fc61e4b058850d878eb01de4bbd
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+ refs/heads/master: bca39a7a030ac21e3b0cc6a8da96b00f3465ebb4
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refs/heads/snap-stage1: e33de59e47c5076a89eadeb38f4934f58a3618a6
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refs/heads/snap-stage3: 2f46b763da2c098913884f101b6d71d69af41b49
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refs/heads/try: 3d5418789064fdb463e872a4e651af1c628a3650
Original file line number Diff line number Diff line change @@ -3018,6 +3018,11 @@ Local variables are immutable unless declared with `let mut`. The
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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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+ 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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+
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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
Original file line number Diff line number Diff line change @@ -1226,18 +1226,6 @@ match crayons[0] {
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}
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~~~~
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- A vector can be destructured using pattern matching:
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-
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- ~~~~
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- let numbers: [int * 3] = [1, 2, 3];
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- let score = match numbers {
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- [] => 0,
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- [a] => a * 10,
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- [a, b] => a * 6 + b * 4,
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- [a, b, c, ..rest] => a * 5 + b * 3 + c * 2 + rest.len() as int
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- };
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- ~~~~
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-
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The elements of a vector _inherit the mutability of the vector_,
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and as such, individual elements may not be reassigned when the
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vector lives in an immutable slot.
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