如何在CQLinq中分组？

Question

我有一个自动生成的接口和实现，它们定义了3000+方法，并为每个方法定义了各自的异步签名。总而言之，6,000+方法。

我想找出哪些没有用过。这是我到目前为止拥有的CQLinq：

// Unused methods in the interface
let notUsed1 = new HashSet<IMethod>( 
from t in JustMyCode.Types 
where t.Name == "IDataProcessor"
from m in t.Methods 
where !m.HasAttribute("xyz.CoreService.CoreServiceOperationAttribute") &&  !m.MethodsCallingMe.Any()
select m)
// Unused methods in the concrete implementation of the interface
let notUsed2 =
from t in JustMyCode.Types 
where t.Name == "DataProcessor"
from m in t.Methods 
where m.HasAttribute("System.CodeDom.Compiler.GeneratedCodeAttribute") && !m.MethodsCallingMe.Any()
// Obtain the methods in the intersection
select m
from m in notUsed2 where notUsed1.Contains(m.OverriddensBase.Single())
let baseName = m.SimpleName.Replace("Async", "")
group m by baseName into g
select new { g } 

可惜，这是行不通的。错误消息为：

Ln 18  Col 8  Type {IGrouping`2<String,IMethod>} not accepted to type first result argument.
Only IMethod, IField, IType, INamespace, IAssembly, IMember, ICodeElement, ICodeElementParent, ICodeContainer, IIssue and IRule are accepted to type first result argument.

看起来group是不可能的。我的想法是按基本名称对方法进行分组(对于同步和异步签名，这是相同的)，并选择具有2个项的条目。但看起来我的计划不会起作用，因为不支持分组。

你会怎么做？

Answer 1

我设法通过将分组键更改为IMethod对象来解决此问题：

// Collect the sync methods
let syncMethods = (
from t in JustMyCode.Types 
where t.Name == "IDataProcessor"
from m in t.Methods 
where !m.HasAttribute("xyz.CoreService.CoreServiceOperationAttribute") && !m.IsAsync
select m).ToDictionary(m => m.SimpleName)
// Unused methods in the interface
let notUsed1 = new HashSet<IMethod>( 
from t in JustMyCode.Types 
where t.Name == "IDataProcessor"
from m in t.Methods 
where !m.HasAttribute("xyz.CoreService.CoreServiceOperationAttribute") && !m.MethodsCallingMe.Any()
select m)
// Unused methods in the concrete implementation of the interface
let notUsed2 =
from t in JustMyCode.Types 
where t.Name == "DataProcessor"
from m in t.Methods 
where m.HasAttribute("System.CodeDom.Compiler.GeneratedCodeAttribute") && !m.MethodsCallingMe.Any()
// Select methods in the intersection
select m
from m in notUsed2 where notUsed1.Contains(m.OverriddensBase.Single())
let syncMethod = syncMethods[m.SimpleName.Replace("Async", "")]
group m by syncMethod into g     // group by the respective sync method
where g.Count() == 2     // return if both sync and async signatures are not used
select new { g.Key }

我想知道如何才能简化这一点。