[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.
This commit is contained in:
Michael Schaller
parent
17b1c1c2d3
commit
736613e26c
14 changed files with 3 additions and 376 deletions
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@ -1,16 +0,0 @@
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TOP = ../..
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SWIG = $(TOP)/../preinst-swig
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CXXSRCS = extend.cxx
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TARGET = example
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INTERFACE = example.i
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SWIGOPT =
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check: build
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$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' CXXSRCS='$(CXXSRCS)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' go_run
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build:
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$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' CXXSRCS='$(CXXSRCS)' SWIG='$(SWIG)' \
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SWIGOPT='$(SWIGOPT)' TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' go_cpp
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clean:
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$(MAKE) -f $(TOP)/Makefile SRCDIR='$(SRCDIR)' INTERFACE='$(INTERFACE)' go_clean
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@ -1,56 +0,0 @@
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/* File : example.h */
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#include <cstdio>
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#include <iostream>
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#include <vector>
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#include <string>
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#include <cmath>
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class Employee {
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private:
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std::string name;
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public:
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Employee(const char* n): name(n) {}
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virtual std::string getTitle() { return getPosition() + " " + getName(); }
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virtual std::string getName() { return name; }
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virtual std::string getPosition() const { return "Employee"; }
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virtual ~Employee() { printf("~Employee() @ %p\n", (void *)this); }
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};
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class Manager: public Employee {
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public:
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Manager(const char* n): Employee(n) {}
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virtual std::string getPosition() const { return "Manager"; }
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};
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class EmployeeList {
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std::vector<Employee*> list;
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public:
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EmployeeList() {
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list.push_back(new Employee("Bob"));
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list.push_back(new Employee("Jane"));
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list.push_back(new Manager("Ted"));
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}
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void addEmployee(Employee *p) {
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list.push_back(p);
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std::cout << "New employee added. Current employees are:" << std::endl;
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std::vector<Employee*>::iterator i;
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for (i=list.begin(); i!=list.end(); i++) {
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std::cout << " " << (*i)->getTitle() << std::endl;
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}
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}
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const Employee *get_item(int i) {
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return list[i];
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}
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~EmployeeList() {
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std::vector<Employee*>::iterator i;
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std::cout << "~EmployeeList, deleting " << list.size() << " employees." << std::endl;
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for (i=list.begin(); i!=list.end(); i++) {
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delete *i;
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}
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std::cout << "~EmployeeList empty." << std::endl;
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}
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};
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@ -1,15 +0,0 @@
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/* File : example.i */
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%module(directors="1") example
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%{
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#include "example.h"
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%}
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%include "std_vector.i"
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%include "std_string.i"
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/* turn on director wrapping for Manager */
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%feature("director") Employee;
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%feature("director") Manager;
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%include "example.h"
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@ -1,4 +0,0 @@
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/* File : example.cxx */
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#include "example.h"
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@ -1,27 +0,0 @@
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<html>
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<head>
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<title>SWIG:Examples:go:extend</title>
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</head>
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<body bgcolor="#ffffff">
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<tt>SWIG/Examples/go/extend/</tt>
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<hr>
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<H2>Extending a simple C++ class in Go</H2>
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<p>
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This example illustrates the extending of a C++ class with cross
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language polymorphism.
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<p>
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<ul>
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<li><a href="example.h">example.h</a>. Header file containing some enums.
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<li><a href="example.i">example.i</a>. Interface file.
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<li><a href="runme.go">runme.go</a>. Sample Go program.
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</ul>
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<hr>
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</body>
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</html>
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@ -1,76 +0,0 @@
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// This file illustrates the cross language polymorphism using directors.
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package main
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import (
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. "./example"
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"fmt"
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)
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type CEO struct{}
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func (p *CEO) GetPosition() string {
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return "CEO"
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}
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func main() {
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// Create an instance of CEO, a class derived from the Go
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// proxy of the underlying C++ class. The calls to getName()
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// and getPosition() are standard, the call to getTitle() uses
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// the director wrappers to call CEO.getPosition().
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e := NewDirectorManager(new(CEO), "Alice")
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fmt.Println(e.GetName(), " is a ", e.GetPosition())
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fmt.Println("Just call her \"", e.GetTitle(), "\"")
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fmt.Println("----------------------")
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// Create a new EmployeeList instance. This class does not
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// have a C++ director wrapper, but can be used freely with
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// other classes that do.
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list := NewEmployeeList()
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// EmployeeList owns its items, so we must surrender ownership
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// of objects we add.
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// e.DisownMemory()
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list.AddEmployee(e)
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fmt.Println("----------------------")
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// Now we access the first four items in list (three are C++
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// objects that EmployeeList's constructor adds, the last is
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// our CEO). The virtual methods of all these instances are
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// treated the same. For items 0, 1, and 2, all methods
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// resolve in C++. For item 3, our CEO, GetTitle calls
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// GetPosition which resolves in Go. The call to GetPosition
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// is slightly different, however, because of the overridden
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// GetPosition() call, since now the object reference has been
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// "laundered" by passing through EmployeeList as an
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// Employee*. Previously, Go resolved the call immediately in
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// CEO, but now Go thinks the object is an instance of class
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// Employee. So the call passes through the Employee proxy
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// class and on to the C wrappers and C++ director, eventually
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// ending up back at the Java CEO implementation of
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// getPosition(). The call to GetTitle() for item 3 runs the
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// C++ Employee::getTitle() method, which in turn calls
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// GetPosition(). This virtual method call passes down
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// through the C++ director class to the Java implementation
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// in CEO. All this routing takes place transparently.
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fmt.Println("(position, title) for items 0-3:")
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fmt.Println(" ", list.Get_item(0).GetPosition(), ", \"", list.Get_item(0).GetTitle(), "\"")
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fmt.Println(" ", list.Get_item(1).GetPosition(), ", \"", list.Get_item(1).GetTitle(), "\"")
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fmt.Println(" ", list.Get_item(2).GetPosition(), ", \"", list.Get_item(2).GetTitle(), "\"")
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fmt.Println(" ", list.Get_item(3).GetPosition(), ", \"", list.Get_item(3).GetTitle(), "\"")
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fmt.Println("----------------------")
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// Time to delete the EmployeeList, which will delete all the
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// Employee* items it contains. The last item is our CEO,
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// which gets destroyed as well.
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DeleteEmployeeList(list)
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fmt.Println("----------------------")
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// All done.
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fmt.Println("Go exit")
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}
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