導致InternalErrorException的可選參數

Question

我開始使用可選參數（因為我來自java，以前從未嘗試過使用它們），並且遇到了以下問題：

Unhandled Exception: Mono.CSharp.InternalErrorException: Internal error

  at Mono.CSharp.MethodGroupExpr.IsApplicable (Mono.CSharp.ResolveContext ec, Mono.CSharp.Arguments& arguments, Int32 arg_count, System.Reflection.MethodBase& method, System.Boolean& params_expanded_form) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.MethodGroupExpr.OverloadResolve (Mono.CSharp.ResolveContext ec, Mono.CSharp.Arguments& Arguments, Boolean may_fail, Location loc) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.New.DoResolve (Mono.CSharp.ResolveContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Expression.Resolve (Mono.CSharp.ResolveContext ec, ResolveFlags flags) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Expression.Resolve (Mono.CSharp.ResolveContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Assign.DoResolve (Mono.CSharp.ResolveContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.SimpleAssign.DoResolve (Mono.CSharp.ResolveContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Expression.Resolve (Mono.CSharp.ResolveContext ec, ResolveFlags flags) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Expression.Resolve (Mono.CSharp.ResolveContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.ExpressionStatement.ResolveStatement (Mono.CSharp.BlockContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.StatementExpression.Resolve (Mono.CSharp.BlockContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Block.Resolve (Mono.CSharp.BlockContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.If.Resolve (Mono.CSharp.BlockContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.Block.Resolve (Mono.CSharp.BlockContext ec) [0x00000] in <filename unknown>:0 

  at Mono.CSharp.ToplevelBlock.Resolve (Mono.CSharp.FlowBranching parent, Mono.CSharp.BlockContext rc, Mono.CSharp.ParametersCompiled ip, IMethodData md) [0x00000] in <filename unknown>:0 

導致此問題的代碼在這里：

Me = new UserAccount(
    name: response["first_name"] as string,
    age:  DateToAge(response["birthday"] as string),
    facebookID: response["id"] as string,
    email: response["email"] as string,
    gender: (response["gender"] as string == "male") ? 0 : 1
);

其中“響應”是Dictionary<string, object>

Dictionary<string, object> response = FacebookHelper.Deserialize(jsonString);

而UserAccount類在這里：

public class UserAccount {
    public string SessionKey;
    public string FacebookID;
    public string Name;
    public string Email;
    public int Age;
    public int Gender; 
    public GeoLocation Location;
    public Texture Avatar;

    public UserAccount(string name, int age, int gender, string email = "", GeoLocation location = null, string sessionKey = "", string facebookID = "",  Texture avatar = null) {
        Name = name;
        Email = email;
        Age = age;
        Gender = gender;
        Location = location;
        SessionKey = sessionKey;
        FacebookID = facebookID;
        Avatar = avatar;
    }
}

誰能指出我解決這個問題的正確方向？

Answer 1

這是一個長期存在的真正的編譯器錯誤。 Unity使用的是舊版本的Mono的分支。 它是由於命名參數而發生的。 就個人而言，有時我可以使用命名參數，但是在某些情況下，它只是崩潰在完全正確的代碼上。 不幸的是，我只能為您提供的建議是不要在Unity Mono編譯器中使用命名參數。