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体验新版 GitCode,发现更多精彩内容 >>
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8cb3da57
编写于
10月 04, 2012
作者:
B
Brian Anderson
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电子邮件补丁
差异文件
docs: Tweaks
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doc/tutorial.md
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8cb3da57
...
...
@@ -872,17 +872,6 @@ is optionally followed by an expression to return. A function can
also return a value by having its top level block produce an
expression.
~~~~
# const copernicus: int = 0;
fn int_to_str(i: int) -> ~str {
if i == copernicus {
return ~"tube sock";
} else {
return ~"violin";
}
}
~~~~
~~~~
fn line(a: int, b: int, x: int) -> int {
a*x + b
...
...
@@ -1122,7 +1111,7 @@ let x = ~10;
let y = copy x;
let z = *x + *y;
assert z = 20;
assert z =
=
20;
~~~~
This is where the 'move' operator comes in. It is similar to
...
...
@@ -1131,7 +1120,7 @@ from `x` to `y`, without violating the constraint that it only has a
single owner (if you used assignment instead of the move operator, the
box would, in principle, be copied).
~~~~
{.
ignore
}
~~~~
{.
xfail-test
}
let x = ~10;
let y = move x;
...
...
@@ -1273,7 +1262,7 @@ also done with square brackets (zero-based):
# BananaMania, Beaver, Bittersweet };
# fn draw_scene(c: Crayon) { }
let crayons: [Crayon] = [BananaMania, Beaver, Bittersweet];
let crayons: [Crayon
* 3
] = [BananaMania, Beaver, Bittersweet];
match crayons[0] {
Bittersweet => draw_scene(crayons[0]),
_ => ()
...
...
@@ -1290,7 +1279,7 @@ elements. Mutable vector literals are written `[mut]` (empty) or `[mut
# Aquamarine, Asparagus, AtomicTangerine,
# BananaMania, Beaver, Bittersweet };
let crayons: [mut Crayon] = [mut BananaMania, Beaver, Bittersweet];
let crayons: [mut Crayon
* 3
] = [mut BananaMania, Beaver, Bittersweet];
crayons[0] = AtomicTangerine;
~~~~
...
...
@@ -1330,7 +1319,8 @@ Strings are implemented with vectors of `[u8]`, though they have a distinct
type. They support most of the same allocation options as
vectors, though the string literal without a storage sigil, e.g.
`"foo"`
is treated differently than a comparable vector (
`[foo]`
).
Where
Wheras plain vectors are stack-allocated fixed length vectors,
plain strings are region pointers to read-only memory.
~~~
// A plain string is a slice to read-only (static) memory
...
...
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