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spec: add subtitles to section on "for" statements

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This matches what we already do for switch statements and makes
this large section more visibly organized. No other changes besides
introducing the titles.

Fixes #4486.

Change-Id: I73f274e4fdd27c6cfeaed79090b4553e57a9c479
Reviewed-on: https://go-review.googlesource.com/33410
Reviewed-by: Rob Pike <r@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Robert Griesemer 2016-11-18 10:49:29 -08:00
parent d0b3c169ac
commit b01f612a69
1 changed files with 8 additions and 2 deletions
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10
doc/go_spec.html
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@ -4799,8 +4799,8 @@ The "fallthrough" statement is not permitted in a type switch.
<h3 id="For_statements">For statements</h3>
<p>
A "for" statement specifies repeated execution of a block. The iteration is
controlled by a condition, a "for" clause, or a "range" clause.
A "for" statement specifies repeated execution of a block. There are three forms:
The iteration may be controlled by a single condition, a "for" clause, or a "range" clause.
</p>
<pre class="ebnf">
@ -4808,6 +4808,8 @@ ForStmt = "for" [ Condition | ForClause | RangeClause ] Block .
Condition = Expression .
</pre>
<h4 id="For_condition">For statements with single condition</h4>
<p>
In its simplest form, a "for" statement specifies the repeated execution of
a block as long as a boolean condition evaluates to true.
@ -4822,6 +4824,8 @@ for a &lt; b {
}
</pre>
<h4 id="For_clause">For statements with <code>for</code> clause</h4>
<p>
A "for" statement with a ForClause is also controlled by its condition, but
additionally it may specify an <i>init</i>
@ -4860,6 +4864,8 @@ for cond { S() } is the same as for ; cond ; { S() }
for { S() } is the same as for true { S() }
</pre>
<h4 id="For_range">For statements with <code>range</code> clause</h4>
<p>
A "for" statement with a "range" clause
iterates through all entries of an array, slice, string or map,