Current State of OOP in Mojo

  • As of now, Mojo is still developing its OOP capabilities. This means that traditional OOP concepts, as seen in languages like Python, are not fully implemented in Mojo. However, Mojo does offer a way to create high-level abstractions similar to objects through structures, also known as structs.

Structures (Structs) in Mojo

  • Structs in Mojo are similar to classes in Python in terms of their functionality. They support methods, fields, operator overloading, and decorators for meta-programming. However, structs in Mojo are statically bound at compile-time. This means they do not allow for dynamic dispatch or runtime changes to the structure, unlike Python classes.

Example of a Struct in Mojo: 

  struct MyPair:
    var first: Int
    var second: Int

    fn __init__(inout self, first: Int, second: Int):
        self.first = first
        self.second = second

    fn dump(self):
        print(self.first, self.second)

Instantiating and Using Structs

  • You can create instances of structs and use their methods. The self argument in Mojo is similar to Python’s self and is used to refer to the current instance of the struct.

Creating and Using an Instance of MyPair: 

  let mine = MyPair(2, 4)
mine.dump() // This will print: 2 4

Key Points to Remember

  • Initialization: The __init__ method in Mojo structs works similarly to constructors in OOP languages.
  • Method Invocation: When calling methods like dump(), the self argument is implicitly passed as the current instance.
  • Static Nature: Mojo structs are static, meaning their structure is fixed at compile time and cannot be altered during runtime.
  • Future Development: Mojo plans to support classes in future releases, which may introduce more dynamic OOP features.

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Last updated 17 Aug 2024, 12:31 +0200 . history