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spec: minor tweaks

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- more idiomatic examples of pointer types
- show use of _ in examples of function types
- remove "legal:" qualification in examples
  for consistency

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5711054
This commit is contained in:
Robert Griesemer 2012-03-01 10:35:15 -08:00
parent b5d4cffd15
commit 953f2dec89
1 changed files with 10 additions and 11 deletions
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21
doc/go_spec.html
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@ -1,6 +1,6 @@
<!--{
"Title": "The Go Programming Language Specification",
"Subtitle": "Version of February 29, 2012"
"Subtitle": "Version of March 1, 2012"
}-->
<!--
@ -1007,8 +1007,8 @@ BaseType = Type .
</pre>
<pre>
*int
*map[string]*chan int
*Point
*[4]int
</pre>
<h3 id="Function_types">Function types</h3>
@ -1046,11 +1046,10 @@ may be invoked with zero or more arguments for that parameter.
<pre>
func()
func(x int)
func() int
func(prefix string, values ...int)
func(a, b int, z float32) bool
func(x int) int
func(a, _ int, z float32) bool
func(a, b int, z float32) (bool)
func(prefix string, values ...int)
func(a, b int, z float64, opt ...interface{}) (success bool)
func(int, int, float64) (float64, *[]int)
func(n int) func(p *T)
@ -2788,13 +2787,13 @@ var s uint = 33
var i = 1&lt;&lt;s // 1 has type int
var j int32 = 1&lt;&lt;s // 1 has type int32; j == 0
var k = uint64(1&lt;&lt;s) // 1 has type uint64; k == 1&lt;&lt;33
var m int = 1.0&lt;&lt;s // legal: 1.0 has type int
var n = 1.0&lt;&lt;s != 0 // legal: 1.0 has type int; n == false if ints are 32bits in size
var o = 1&lt;&lt;s == 2&lt;&lt;s // legal: 1 and 2 have type int; o == true if ints are 32bits in size
var m int = 1.0&lt;&lt;s // 1.0 has type int
var n = 1.0&lt;&lt;s != 0 // 1.0 has type int; n == false if ints are 32bits in size
var o = 1&lt;&lt;s == 2&lt;&lt;s // 1 and 2 have type int; o == true if ints are 32bits in size
var p = 1&lt;&lt;s == 1&lt;&lt;33 // illegal if ints are 32bits in size: 1 has type int, but 1&lt;&lt;33 overflows int
var u = 1.0&lt;&lt;s // illegal: 1.0 has type float64, cannot shift
var v float32 = 1&lt;&lt;s // illegal: 1 has type float32, cannot shift
var w int64 = 1.0&lt;&lt;33 // legal: 1.0&lt;&lt;33 is a constant shift expression
var w int64 = 1.0&lt;&lt;33 // 1.0&lt;&lt;33 is a constant shift expression
</pre>
<h3 id="Operator_precedence">Operator precedence</h3>