[Feature Request] Align assignments in column

[xshaheen]

Add options to enable format code as following:

Object initializer:

// From
var foo = new X {
     short = "short member",
     longEnough = "long member",
}

// To
var foo = new X {
     short      = "short member",
     longEnough = "long member",
}

Tuple initializers

// From
var foo = (
    short: "short member",
    longEnough: "long member"
);

var foo = (
    short:      "short member",
    longEnough: "long member"
);

For enum:

// From
public enum X {
   Foo = 1,
   FooBar = 2,
   X = 3,
}

// To
public enum X {
   Foo    = 1,
   FooBar = 2,
   X      = 3,
}

Field assignment

// From
private string x = "x";
public Foo xxxxxxxx = "long name";

// To
private string x    = "x";
public Foo xxxxxxxx = "long name";

Variable assignment

// From
var x = 1;
var xxxxxx = 2;
var xxx = 2;

// To
var x      = 1;
var xxxxxx = 2;
var xxx    = 2;

Switch expressions

// From
var foo = op switch {
    op.Add => x + y,
    op.Subtract => x - y,
    op.Multiply => x * y,
    op.Divide => x / y
}

// To
var foo = op switch {
    op.Add      => x + y,
    op.Subtract => x - y,
    op.Multiply => x * y,
    op.Divide   => x / y
}

Property patterns

// From
bool matches = obj is Foo {
    Short: 1,
    LongEnough: 2,
};

// To
bool matches = obj is Foo {
    Short:      1,
    LongEnough: 2,
};

[JoeRobich]

The Roslyn formatter does not currently support column alignment. Closing this issue as there are several open issues tracking support for this type of formatting dotnet/roslyn#51389, dotnet/roslyn#28729, and dotnet/roslyn#38241. Please vote them up and add any specific requirements that you might have.