OOP - Interface

[Ex Ovo Omnia]

I learned that MQL5 implemented the interface keyword.

Could someone bring me some insight how it could be helpful? I did not find any use of it, it seemed more like a limited abstract class than the interface (as known in Java).

[William Roeder]

Language Basics / Data Types / Structures, Classes and Interfaces - Reference on algorithmic/automated trading language for MetaTrader 5

An interface allows determining specific functionality, which a class can then implement. In fact, an interface is a class that cannot contain any members, and may not have a constructor and/or a destructor. All methods declared in an interface are purely virtual, even without an explicit definition.

Exactly a limited abstract class, syntactic sugar.  No need for Abstract Classes and Pure Virtual Functions, implicitly pure virtual functions.

[Ex Ovo Omnia]

whroeder1:
Language Basics / Data Types / Structures, Classes and Interfaces - Reference on algorithmic/automated trading language for MetaTrader 5
Exactly a limited abstract class, syntactic sugar.  No need for Abstract Classes and Pure Virtual Functions, implicitly pure virtual functions.

Thanks, so I can forget it.

[Amir Yacoby]

Ovo Cz:

I learned that MQL5 implemented the interface keyword.

Could someone bring me some insight how it could be helpful? I did not find any use of it, it seemed more like a limited abstract class than the interface (as known in Java).

If metaquotes will add the possibility of a class to inherit a class and at the same time implement an interface it will be useful.

Without it, it's a half way.

[Ex Ovo Omnia]

Amir Yacoby:
If metaquotes will add the possibility of a class to inherit a class and at the same time implement an interface it will be useful.

Without it, it's a half way.

Yes, this is the (only) way the interface can be used.

[Amir Yacoby]

Ovo Cz:
Yes, this is the (only) way the interface can be used.

Just recieved an update from metaquotes saying it will be allowed to do so.

[Ex Ovo Omnia]

Amir Yacoby:
Just recieved an update from metaquotes saying it will be allowed to do so.

Probably, though I am afraid it won't happen this life.

[Marco vd Heijden]

It's actually problematic‌ and easier to achieve taking the regular route.

[Ex Ovo Omnia]

Marco vd Heijden:

It's actually problematic‌ and easier to achieve taking the regular route.

Are you talking about implementation or about coding?‌ As for coding, the only workaround I have been using are wrappers. So instead of adding a single method, I need to define a new class.

[Marco vd Heijden]

I created one item and tried to replicate it multiple times which was dramatic so i ended up writing the entire thing in classical terms which worked fine.

The problem was in the (string) identifiers they got mixed up maybe i will find a solution in the future but for now i tend to stay away.‌

‌

[Ex Ovo Omnia]

Marco vd Heijden:

I created one item and tried to replicate it multiple times which was dramatic so i ended up writing the entire thing in classical terms which worked fine.

The problem was in the (string) identifiers they got mixed up maybe i will find a solution in the future but for now i tend to stay away.‌

To be honest, I cannot figure out what you are describing.