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| author | Michael Schaller <michael@5challer.de> | 2015-08-05 10:01:15 +0200 |
|---|---|---|
| committer | Michael Schaller <michael@5challer.de> | 2015-08-05 10:01:15 +0200 |
| commit | 736613e26c911645237594980f6fa3064f634701 (patch) | |
| tree | c56733df7fdda4f3a673c880ff1bea6b3e38af47 /Examples/go/callback/index.html | |
| parent | 17b1c1c2d34ddce42d39adf03c810f5af0d7ef58 (diff) | |
| download | swig-736613e26c911645237594980f6fa3064f634701.tar.gz | |
[Go] Documentation cleanup of obsolete 'callback' and 'extend' examples.
After commit 17b1c1c (pull request 447; issue 418) the 'callback' and 'extend'
examples have been removed in favor of the 'director' example.
Diffstat (limited to 'Examples/go/callback/index.html')
| -rw-r--r-- | Examples/go/callback/index.html | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/Examples/go/callback/index.html b/Examples/go/callback/index.html deleted file mode 100644 index b053cf547..000000000 --- a/Examples/go/callback/index.html +++ /dev/null @@ -1,81 +0,0 @@ -<html> -<head> -<title>SWIG:Examples:go:callback</title> -</head> - -<body bgcolor="#ffffff"> - - -<tt>SWIG/Examples/go/callback/</tt> -<hr> - -<H2>Implementing C++ callbacks in Go</H2> - -<p> -This example illustrates how to use directors to implement C++ -callbacks in Go. -</p> - -<p> -Because Go and C++ use inheritance differently, you must call a -different function to create a class which uses callbacks. Instead of -calling the usual constructor function whose name is <tt>New</tt> -followed by the capitalized name of the class, you call a function -named <tt>NewDirector</tt> followed by the capitalized name of the -class. -</p> - -<p> -The first argument to the <tt>NewDirector</tt> function is an instance -of a type. The <tt>NewDirector</tt> function will return an interface -value as usual. However, when calling any method on the returned -value, the program will first check whether the value passed -to <tt>NewDirector</tt> implements that method. If it does, the -method will be called in Go. This is true whether the method is -called from Go code or C++ code. -</p> - -<p> -Note that the Go code will be called with just the Go value, not the -C++ value. If the Go code needs to call a C++ method on itself, you -need to get a copy of the C++ object. This is typically done as -follows: - -<blockquote> -<pre> -type Child struct { abi Parent } -func (p *Child) ChildMethod() { - p.abi.ParentMethod() -} -func f() { - p := &Child{nil} - d := NewDirectorParent(p) - p.abi = d - ... -} -</pre> -</blockquote> - -In other words, we first create the Go value. We pass that to -the <tt>NewDirector</tt> function to create the C++ value; this C++ -value will be created with an association to the Go value. We then -store the C++ value in the Go value, giving us the reverse -association. That permits us to call parent methods from the child. - -</p> - -<p> -To delete a director object, use the function <tt>DeleteDirector</tt> -followed by the capitalized name of the class. -</p> - -<p> -<ul> -<li><a href="example.h">example.h</a>. Header file containing some enums. -<li><a href="example.i">example.i</a>. Interface file. -<li><a href="runme.go">runme.go</a>. Sample Go program. -</ul> - -<hr> -</body> -</html> |