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Last active January 28, 2024 06:25
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This is a factory to create a TypeSyntax Roslyn Model object from simple strings. Enjoy!
using System.Linq;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;
namespace StackOverflow.Roslyn
{
public static class TypeSyntaxFactory
{
/// <summary>
/// Used to generate a type without generic arguments
/// </summary>
/// <param name="identifier">The name of the type to be generated</param>
/// <returns>An instance of TypeSyntax from the Roslyn Model</returns>
public static TypeSyntax GetTypeSyntax(string identifier)
{
return
SyntaxFactory.IdentifierName(
SyntaxFactory.Identifier(identifier)
);
}
/// <summary>
/// Used to generate a type with generic arguments
/// </summary>
/// <param name="identifier">Name of the Generic Type</param>
/// <param name="arguments">
/// Types of the Generic Arguments, which must be basic identifiers
/// </param>
/// <returns>An instance of TypeSyntax from the Roslyn Model</returns>
public static TypeSyntax GetTypeSyntax(string identifier, params string[] arguments)
{
return GetTypeSyntax(identifier, arguments.Select(GetTypeSyntax).ToArray());
}
/// <summary>
/// Used to generate a type with generic arguments
/// </summary>
/// <param name="identifier">Name of the Generic Type</param>
/// <param name="arguments">
/// Types of the Generic Arguments, which themselves may be generic types
/// </param>
/// <returns>An instance of TypeSyntax from the Roslyn Model</returns>
public static TypeSyntax GetTypeSyntax(string identifier, params TypeSyntax[] arguments)
{
return
SyntaxFactory.GenericName(
SyntaxFactory.Identifier(identifier),
SyntaxFactory.TypeArgumentList(
SyntaxFactory.SeparatedList(
arguments.Select(
x =>
{
if(x is GenericNameSyntax)
{
var gen_x = x as GenericNameSyntax;
return
GetTypeSyntax(
gen_x.Identifier.ToString(),
gen_x.TypeArgumentList.Arguments.ToArray()
);
}
else
{
return x;
}
}
)
)
)
);
}
}
}
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