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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>,
elements that are themselves composite literals may elide the respective
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>
<pre>
[...]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}}
[...]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}}
[...]*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>
<p>