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minor adjustments to switches text

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R=r
DELTA=16  (5 added, 1 deleted, 10 changed)
OCL=26530
CL=26543
This commit is contained in:
Robert Griesemer 2009-03-19 08:39:40 -07:00
parent 37ab838d3a
commit 091cba8d03
1 changed files with 15 additions and 11 deletions
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26
doc/go_spec.html
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@ -3133,6 +3133,11 @@ if x := f(); x < y {
An expression or type specifier is compared to the "cases"
inside the "switch" to determine which branch
to execute.
<pre class="grammar">
SwitchStat = ExprSwitchStat | TypeSwitchStat .
</pre>
There are two forms: expression switches and type switches.
In an expression switch, the cases contain expressions that are compared
against the value of the switch expression.
@ -3159,10 +3164,9 @@ the expression <code>true</code>.
</p>
<pre class="grammar">
SwitchStat = ExprSwitchStat | TypeSwitchStat .
ExprSwitchStat = "switch" [ [ SimpleStat ] ";" ] [ Expression ] "{" { ExprCaseClause } "}" .
ExprCaseClause = ExprSwitchCase ":" [ StatementList ] .
ExprSwitchCase = "case" ExpressionList | "default" .
ExprSwitchStat = "switch" [ [ SimpleStat ] ";" ] [ Expression ] "{" { ExprCaseClause } "}" .
ExprCaseClause = ExprSwitchCase ":" [ StatementList ] .
ExprSwitchCase = "case" ExpressionList | "default" .
</pre>
<p>
@ -3217,10 +3221,10 @@ in the type guard.
</p>
<pre class="grammar">
TypeSwitchStat = "switch" [ [ SimpleStat ] ";" ] TypeSwitchGuard "{" { TypeCaseClause } "}" .
TypeSwitchGuard = identifier ":=" Expression "." "(" "type" ")" .
TypeCaseClause = TypeSwitchCase ":" [ StatementList ] .
TypeSwitchCase = "case" type | "default" .
TypeSwitchStat = "switch" [ [ SimpleStat ] ";" ] TypeSwitchGuard "{" { TypeCaseClause } "}" .
TypeSwitchGuard = identifier ":=" Expression "." "(" "type" ")" .
TypeCaseClause = TypeSwitchCase ":" [ StatementList ] .
TypeSwitchCase = "case" type | "default" .
</pre>
<p>
@ -3642,9 +3646,9 @@ the creation of <code>v</code>.
<p>
A "fallthrough" statement transfers control to the first statement of the
next case clause in a "switch" statement (§Switch statements). It may
be used only as the final non-empty statement in a case or default clause in a
"switch" statement.
next case clause in a expression "switch" statement (§Expression switches). It may
be used only as the final non-empty statement in a case or default clause in an
expression "switch" statement.
</p>
<pre class="grammar">