CodeDom泛型类型约束

Question

Is there a way to generate a class constraint with CodeDom.

Because when I use something like

var method = new CodeMemberMethod();
var genericParam = new CodeTypeParameter("InterfaceType");
genericParam.Constraints.Add("class");
method.TypeParameters.Add(genericParam);

the generated code is like

private InterfaceType GetImpl<InterfaceType>()
    where InterfaceType : @class
{
}

The best workaround i found is to use a leading whitespace before the class

genericParam.Constraints.Add(" class");

But this seems to be at best a workaround.

Answer 1

It seems that there is no straigntforward way to specify that constraint. Neither for the "struct" constraint .

For the "T : new()" constraint use the flag HasConstructorConstraint

For the rest use CodeTypeReference as in this msdn example .

Answer 2

I also use zero-width space ( "\\x200Bclass" ) instead of normal space. Then I replace it in final string with empty string: .Replace("\\x200B", string.Empty);