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make SimpleStmt include EmptyStmt and the grammar simplifies a bit.

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SimpleStmt was always used as an option.

fix bug: divide is a right shift

DELTA=8  (0 added, 0 deleted, 8 changed)
OCL=34612
CL=34614
This commit is contained in:
Rob Pike 2009-09-14 17:39:17 -07:00
parent 28eba4877b
commit f3a33bca40
1 changed files with 8 additions and 8 deletions
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16
doc/go_spec.html
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@ -2557,7 +2557,7 @@ Examples:
<p> <p>
If the dividend is positive and the divisor is a constant power of 2, If the dividend is positive and the divisor is a constant power of 2,
the division may be replaced by a left shift, and computing the remainder may the division may be replaced by a right shift, and computing the remainder may
be replaced by a bitwise "and" operation: be replaced by a bitwise "and" operation:
</p> </p>
@ -3011,12 +3011,12 @@ Statements control execution.
<pre class="ebnf"> <pre class="ebnf">
Statement = Statement =
Declaration | EmptyStmt | LabeledStmt | Declaration | LabeledStmt | SimpleStmt |
SimpleStmt | GoStmt | ReturnStmt | BreakStmt | ContinueStmt | GotoStmt | GoStmt | ReturnStmt | BreakStmt | ContinueStmt | GotoStmt |
FallthroughStmt | Block | IfStmt | SwitchStmt | SelectStmt | ForStmt | FallthroughStmt | Block | IfStmt | SwitchStmt | SelectStmt | ForStmt |
DeferStmt . DeferStmt .
SimpleStmt = ExpressionStmt | IncDecStmt | Assignment | ShortVarDecl . SimpleStmt = EmptyStmt | ExpressionStmt | IncDecStmt | Assignment | ShortVarDecl .
StatementList = Statement { Separator Statement } . StatementList = Statement { Separator Statement } .
Separator = [ ";" ] . Separator = [ ";" ] .
@ -3196,7 +3196,7 @@ is equivalent to <code>true</code>.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
IfStmt = "if" [ [ SimpleStmt ] ";" ] [ Expression ] Block [ "else" Statement ] . IfStmt = "if" [ SimpleStmt ";" ] [ Expression ] Block [ "else" Statement ] .
</pre> </pre>
<pre> <pre>
@ -3261,7 +3261,7 @@ the expression <code>true</code>.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
ExprSwitchStmt = "switch" [ [ SimpleStmt ] ";" ] [ Expression ] "{" { ExprCaseClause } "}" . ExprSwitchStmt = "switch" [ SimpleStmt ";" ] [ Expression ] "{" { ExprCaseClause } "}" .
ExprCaseClause = ExprSwitchCase ":" [ StatementList ] . ExprCaseClause = ExprSwitchCase ":" [ StatementList ] .
ExprSwitchCase = "case" ExpressionList | "default" . ExprSwitchCase = "case" ExpressionList | "default" .
</pre> </pre>
@ -3311,7 +3311,7 @@ in the type assertion.
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
TypeSwitchStmt = "switch" [ [ SimpleStmt ] ";" ] TypeSwitchGuard "{" { TypeCaseClause } "}" . TypeSwitchStmt = "switch" [ SimpleStmt ";" ] TypeSwitchGuard "{" { TypeCaseClause } "}" .
TypeSwitchGuard = [ identifier ":=" ] Expression "." "(" "type" ")" . TypeSwitchGuard = [ identifier ":=" ] Expression "." "(" "type" ")" .
TypeCaseClause = TypeSwitchCase ":" [ StatementList ] . TypeCaseClause = TypeSwitchCase ":" [ StatementList ] .
TypeSwitchCase = "case" Type | "default" . TypeSwitchCase = "case" Type | "default" .
@ -3426,7 +3426,7 @@ an increment or decrement statement. The init statement may be a
</p> </p>
<pre class="ebnf"> <pre class="ebnf">
ForClause = [ InitStmt ] ";" [ Condition ] ";" [ PostStmt ] . ForClause = InitStmt ";" [ Condition ] ";" PostStmt .
InitStmt = SimpleStmt . InitStmt = SimpleStmt .
PostStmt = SimpleStmt . PostStmt = SimpleStmt .
</pre> </pre>