diff options
Diffstat (limited to 'doc/go_spec.html')
| -rw-r--r-- | doc/go_spec.html | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/doc/go_spec.html b/doc/go_spec.html index a95ed704a..85dfc44bd 100644 --- a/doc/go_spec.html +++ b/doc/go_spec.html @@ -1,5 +1,5 @@ <!-- title The Go Programming Language Specification --> -<!-- subtitle Version of February 8, 2011 --> +<!-- subtitle Version of March 3, 2011 --> <!-- TODO @@ -1227,9 +1227,11 @@ make(chan int, 100) <p> The capacity, in number of elements, sets the size of the buffer in the channel. If the -capacity is greater than zero, the channel is asynchronous: provided the -buffer is not full, sends can succeed without blocking. If the capacity is zero -or absent, the communication succeeds only when both a sender and receiver are ready. +capacity is greater than zero, the channel is asynchronous: communication operations +succeed without blocking if the buffer is not full (sends) or not empty (receives), +and elements are received in the order they are sent. +If the capacity is zero or absent, the communication succeeds only when both a sender and +receiver are ready. </p> <p> @@ -1429,8 +1431,8 @@ Go is lexically scoped using blocks: <li>The scope of a predeclared identifier is the universe block.</li> <li>The scope of an identifier denoting a constant, type, variable, - or function declared at top level (outside any function) is the - package block.</li> + or function (but not method) declared at top level (outside any + function) is the package block.</li> <li>The scope of an imported package identifier is the file block of the file containing the import declaration.</li> @@ -2265,7 +2267,7 @@ If there is not exactly one <code>f</code> with shallowest depth, the selector expression is illegal. </li> <li> -For a variable <code>x</code> of type <code>I</code> or <code>*I</code> +For a variable <code>x</code> of type <code>I</code> where <code>I</code> is an interface type, <code>x.f</code> denotes the actual method with name <code>f</code> of the value assigned to <code>x</code> if there is such a method. @@ -2742,7 +2744,7 @@ and finally <code>||</code> (logical or): Precedence Operator 5 * / % << >> & &^ 4 + - | ^ - 3 == != < <= > >= + 3 == != < <= > >= 2 && 1 || </pre> @@ -2758,7 +2760,7 @@ For instance, <code>x / y * z</code> is the same as <code>(x / y) * z</code>. x <= f() ^a >> b f() || g() -x == y+1 && <-chan_ptr > 0 +x == y+1 && <-chan_ptr > 0 </pre> @@ -3684,17 +3686,16 @@ complex, or string constant. "If" statements specify the conditional execution of two branches according to the value of a boolean expression. If the expression evaluates to true, the "if" branch is executed, otherwise, if -present, the "else" branch is executed. A missing condition -is equivalent to <code>true</code>. +present, the "else" branch is executed. </p> <pre class="ebnf"> -IfStmt = "if" [ SimpleStmt ";" ] [ Expression ] Block [ "else" Statement ] . +IfStmt = "if" [ SimpleStmt ";" ] Expression Block [ "else" Statement ] . </pre> <pre> -if x > 0 { - return true; +if x > max { + x = max } </pre> @@ -3706,7 +3707,7 @@ executes before the expression is evaluated. <pre> if x := f(); x < y { return x -} else if x > z { +} else if x > z { return z } else { return y @@ -4697,7 +4698,7 @@ func protect(g func()) { defer func() { log.Println("done") // Println executes normally even in there is a panic if x := recover(); x != nil { - log.Printf("runtime panic: %v", x) + log.Printf("run time panic: %v", x) } } log.Println("start") @@ -4794,7 +4795,7 @@ The PackageName is used in <a href="#Qualified_identifiers">qualified identifier to access the exported identifiers of the package within the importing source file. It is declared in the <a href="#Blocks">file block</a>. If the PackageName is omitted, it defaults to the identifier specified in the -<a href="#Package_clauses">package clause</a> of the imported package. +<a href="#Package_clause">package clause</a> of the imported package. If an explicit period (<code>.</code>) appears instead of a name, all the package's exported identifiers will be declared in the current file's file block and can be accessed without a qualifier. @@ -5151,7 +5152,6 @@ The following minimal alignment properties are guaranteed: <h2 id="Implementation_differences"><span class="alert">Implementation differences - TODO</span></h2> <ul> <li><span class="alert">Implementation does not honor the restriction on goto statements and targets (no intervening declarations).</span></li> - <li><span class="alert">Gccgo: The <code>append</code> built-in function is not yet implemented.</span></li> <li><span class="alert">Gccgo: Method expressions are partially implemented.</span></li> <li><span class="alert">Gccgo: allows only one init() function per source file.</span></li> </ul> |