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Helpers

Module Helpers

Helpers.qll Provides helper classes and methods related to LINQ.

Import path


                                import Linq.Helpers

Imports

csharp

The default C# QL library.

Predicates

isEnumerableType	Holds if the type’s qualified name is “System.Linq.Enumerable”
isIEnumerableType	Holds if the type’s qualified name starts with “System.Collections.Generic.IEnumerable”
missedAllOpportunity	Holds if `foreach` statement `fes` could be converted to a `.All()` call. That is, the `ForeachStmt` contains a single `if` with a condition that accesses the loop variable and with a body that assigns `false` to a variable and `break`s out of the `foreach`.
missedCastOpportunity	Holds if `foreach` statement `fes` could be converted to a `.Cast()` call. That is, the loop variable is accessed only in the first statement of the block, and the access is a cast. The first statement needs to be a `LocalVariableDeclStmt`.
missedOfTypeOpportunity	Holds if `foreach` statement `fes` could be converted to an `.OfType()` call. That is, the loop variable is accessed only in the first statement of the block, and the access is a cast with the `as` operator. The first statement needs to be a `LocalVariableDeclStmt`.
missedSelectOpportunity	Holds if `foreach` statement `fes` could be converted to a `.Select()` call. That is, the loop variable is accessed only in the first statement of the block, and the access is not a cast. The first statement needs to be a `LocalVariableDeclStmt`.
missedWhereOpportunity	Holds if `foreach` statement `fes` could be converted to a `.Where()` call. That is, first statement of the loop is an `if`, which accesses the loop variable, and the body of the `if` is either a `continue` or there’s nothing else in the loop than the `if`.

Classes

AnyCall	A LINQ Any(…) call.
CountCall	A LINQ Count(…) call.
IEnumerableSequence	A variable of type IEnumerable<T>, for some T.
SelectCall	A LINQ Select(…) call.