Obsolete Fixer ✨

Fixer for [Obsolete] in C# with the powers of Roslyn! 💎

Currently supported:

• Method calls
• Getters
• Setters
• contructor calls: new MyClass - no transformation of parameters yet
• static method, getters or setter calls and change type.

Arguments values could also be transformed, see examples.

Message syntax

To unleash the powers of this fixer, the text in the [Obsolete] needs to be in a recognisable format.

The replace value needs to between backticks (`) and after the text Replace with (case insensitive). Text before and after the "Replace with" is OK.

Examples OK:

• [Obsolete("Replace with `MyNewMethod`")]
• [Obsolete("Replace with `MyNewMethod(x, y)`")]
• [Obsolete("Replace with: `MyNewMethod`")]
• [Obsolete("This method will be replaced! Replace with: `MyNewMethod`. This will be removed in version 123")]

Examples nope:

• [Obsolete("Replace with 'MyNewMethod'")] - no backticks

Examples

Simple method replacement

Given:

class MyClass
{

    [Obsolete("Replace with `MyNewMethod`")]
    public void MyOldMethod(string x, object y)
    {

    }

    public void MyNewMethod(string x2, object y2)
    {

    }
}

and call

myClass.MyOldMethod("text", 2);

Will be after the fix:

myClass.MyNewMethod("text", 2);

Method replacement with argument transformations

Given:

class MyClass
{

    [Obsolete("Replace with `MyNewMethod(y, x, \"text2\")`")]
    public void MyOldMethod(string x, object y)
    {

    }

    public void MyNewMethod(object y, string x, string y2)
    {

    }
}

Note the argument's order has been changed and a new argument has been added! :grinning:

When having this call:

myClass.MyOldMethod("text", 2);

Will be after the fix:

myClass.MyNewMethod(2, "text", "text2");

FAQ

Why do I need this?

Because fixing obsolete code is boring! 😴 😴

Why is the syntax so strict?

I prefer that the code could still be compiled after the fix. 😎

Will the syntax be configurable?

Not sure, also not sure how that works with the VISX

Why all those emojis 😮 ?

😆 🙈

Roadmap

• Inheritance: Support for changing base class / interface
• Constructor with parameter transformation
• Transformation of parameter type? (e.g. int to string)