46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
// generics/Mixins.cpp
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// ©2015 MindView LLC: see Copyright.txt
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#include <string>
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#include <ctime>
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#include <iostream>
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using namespace std;
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template<class T> class TimeStamped : public T {
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long timeStamp;
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public:
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TimeStamped() { timeStamp = time(0); }
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long getStamp() { return timeStamp; }
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};
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template<class T> class SerialNumbered : public T {
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long serialNumber;
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static long counter;
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public:
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SerialNumbered() { serialNumber = counter++; }
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long getSerialNumber() { return serialNumber; }
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};
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// Define and initialize the static storage:
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template<class T> long SerialNumbered<T>::counter = 1;
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class Basic {
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string value;
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public:
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void set(string val) { value = val; }
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string get() { return value; }
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};
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int main() {
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TimeStamped<SerialNumbered<Basic>> mixin1, mixin2;
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mixin1.set("test string 1");
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mixin2.set("test string 2");
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cout << mixin1.get() << " " << mixin1.getStamp() <<
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" " << mixin1.getSerialNumber() << endl;
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cout << mixin2.get() << " " << mixin2.getStamp() <<
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" " << mixin2.getSerialNumber() << endl;
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}
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/* Output:
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test string 1 1129840250 1
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test string 2 1129840250 2
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*/
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