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spec: additional composite literal shortenings per Go 1 plan

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R=golang-dev, gri, r, r
CC=golang-dev
https://golang.org/cl/5449067
This commit is contained in:
Russ Cox 2011-12-02 14:12:53 -05:00
parent 951ba56adb
commit 5f49456465
1 changed files with 17 additions and 2 deletions
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19
doc/go_spec.html
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@ -2118,11 +2118,26 @@ tmp[0 : n]
Within a composite literal of array, slice, or map type <code>T</code>, Within a composite literal of array, slice, or map type <code>T</code>,
elements that are themselves composite literals may elide the respective elements that are themselves composite literals may elide the respective
literal type if it is identical to the element type of <code>T</code>. literal type if it is identical to the element type of <code>T</code>.
Similarly, elements that are addresses of composite literals may elide
the <code>&T</code> when the the element type is <code>*T</code>.
The same elisions may be applied to field values within a struct literal,
but only if the value has a field name key.
</p> </p>
<pre> <pre>
[...]Point{{1.5, -3.5}, {0, 0}} // same as [...]Point{Point{1.5, -3.5}, Point{0, 0}} [...]Point{{1.5, -3.5}, {0, 0}} // same as [...]Point{Point{1.5, -3.5}, Point{0, 0}}
[][]int{{1, 2, 3}, {4, 5}} // same as [][]int{[]int{1, 2, 3}, []int{4, 5}} [][]int{{1, 2, 3}, {4, 5}} // same as [][]int{[]int{1, 2, 3}, []int{4, 5}}
[...]*Point{{1.5, -3.5}, {0, 0}} // same as [...]*Point{&Point{1.5, -3.5}, &Point{0, 0}}
type List struct {
Val int
Next *List
}
&List{Val: 1, Next: {Val: 2}} // same as &List{Val: 1, Next: &List{Val: 2}}
</pre> </pre>
<p> <p>