关于 c#:Derive parameter type with Roslyn

Derive parameter type with Roslyn

我创建了以下对象来遍历我的构造函数:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
internal class ConstructorWalker : CSharpSyntaxWalker
{
    private string className = String.Empty;
    private readonly SemanticModel semanticModel;
    private readonly Action<string> callback;

    public ConstructorWalker(Document document, Action<string> callback)
    {
        this.semanticModel = document.GetSemanticModelAsync().Result;
        this.callback = callback;
    }

    public override void VisitConstructorDeclaration(ConstructorDeclarationSyntax node)
    {
        var typeToMatch = typeof(Dictionary<string, Func<GenericMobileRequest, Result<object>, Task>>);
        var parameters = node.ParameterList;

        foreach (var param in parameters.ChildNodes()) {
            //This does not work... .Symbol is null
            var paramType = ((IParameterSymbol)semanticModel.GetSymbolInfo(param).Symbol).Type;
            if(paramType == typeToMatch) {
               //PROFIT!!!
            }
        }

如何确定参数的类型以确保它是我感兴趣的类型?


使用 Roslyn 无法如此轻松地获取参数的实际 Type。您可以获得 TypeSyntaxITypeSymbol 如下所示,但除非您使用反射,否则您无法真正获得 Type 对象(据我所知)。

1
2
3
4
5
6
7
8
9
10
11
string typeToMatchString ="Dictionary<string, Func<Exception, HashSet<object>, Task>>"

foreach (var parameter in node.ParameterList.Parameters)
{
    var typeSyntax = parameter.Type;
    var typeSymbol = semanticModel.GetTypeInfo(typeSyntax).Type;

    // Maybe comparing the name is enough?
    if (typeSymbol.ToDisplayString() == typeToMatchString)
        //PROFIT???      
}

您可能也想查看这个相关问题。