I would like some help with inheritance syntax
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I want to create a new class called MyMap, and I would like it to inherit the QMap class so that I can extend it's properties, but I keep getting the error:
"error: expected class-name before '{' token"
Is this not possible to do with QMap? if I swap out QMap for something like QObject that error goes away. Any help in this area will be most appreciated. Thank you.
PS i would love a code snipit :) ty!!!
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It should work. Can you paste the sample code ?
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Hi @MDCato and welcome to Qt Forum.
QMap is not a class but a class template, so, you need to specify which type of QMap that you are trying to inherit.
You can decide between 2 approaches:
1) Create a new class template
2) Inherit a specific class from QMap class template.Create new class template - CustomMap<Key,Value>
#include <QMap> template <class Key, class Value> class CustomMap : public QMap<Key, Value> { ... };Create CustomMap that inherits from QMap<QString, int> (QString as Key, Int as Value)
#include <QMap> #include <QString> class CustomMap : public QMap<QString, int> { ... };@Computer Science Student - Brazil
Web Developer and Researcher
“Sometimes it’s the people no one imagines anything of who do the things that no one can imagine.” - Alan Turing -
Hi @MDCato and welcome to Qt Forum.
QMap is not a class but a class template, so, you need to specify which type of QMap that you are trying to inherit.
You can decide between 2 approaches:
1) Create a new class template
2) Inherit a specific class from QMap class template.Create new class template - CustomMap<Key,Value>
#include <QMap> template <class Key, class Value> class CustomMap : public QMap<Key, Value> { ... };Create CustomMap that inherits from QMap<QString, int> (QString as Key, Int as Value)
#include <QMap> #include <QString> class CustomMap : public QMap<QString, int> { ... };@KillerSmath, that was exactly what I was looking for. I never would have figured that one out by myself in a million years,
Thank you for your help :)
