How to convert a C# object initializer to use a constructor using Resharper structural find and replace

Question

I want to use a Resharper structural search and replace template to automatically replace examples of this:

new Fruit { Name = "Apple", IsTasty = true }

With this:

new Fruit("Apple", true)

(Note, the required constructor already exists)

I've tried various combinations like this:

new $type$ { Name = $name$, IsTasty = $isTasty$ };

...using various different Placeholder types, but R# doesn't find any of the examples in my code. Has anyone done this before?

Answer 1

So I just did this in resharper (9.0.2 I think)

Create pattern: FruityChange

• new $type$ { Name = $param1$, IsTasty = $param2$ }
• $type$ is a type
• $param1$ is an expression of type string
• $param2$ is an expression of type bool
• Pattern Severity "Show as error"

with class Fruit

public class Fruit
{
    public Fruit(string name, bool isTasty)
    {
        Name = name;
        IsTasty = isTasty;
    }

    public string Name { get; set; }
    public bool IsTasty { get; set; }
}

And that underlined the expression in the code editor and alt-tab gave me the "Replace With" option for it. It at least works on my machine :-)

Answer 2

By default, it seems R# treats your placeholders as identifiers, and the pattern match fails.

Double-click each placeholder on the right side, and change "identifier" to "expression".