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Questions tagged [deriving]

In Haskell, a derived instance is an instance declaration that is generated automatically in conjunction with a data or newtype declaration. The body of a derived instance declaration is derived syntactically from the definition of the associated type.

In Haskell, a derived instance is an instance declaration that is generated automatically in conjunction with a data or newtype declaration. The body of a derived instance declaration is derived syntactically from the definition of the associated type.

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Deriving instance Typeable with context

I am writing function set wor working with HTTP requests and need to create a set of Exceptions for handling failures. Here it is data HStream ty => ErrorResponse ty = ErrorResponse (Response ty) data HStream ty => HttpException ty =…
Andrey Kuznetsov
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Deriving Data.Complex in Haskell

I have code that looks a little like the following: import Data.Complex data Foo = N Number | C ComplexNum data Number = Int Integer | Real Float | Rational Rational deriving Show data ComplexNum = con1…
user3125280
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Deriving currently on loan items

I have a table of loan information. example: _________________________________________________________________ |id|LoanDate|EquipmentId|FromUser|FromLocation|ToUser|ToLocation| |---------------------------------------------------------------| |1…
Mike
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How to call the base constructor if your class derives from unique_ptr

How can do I implement the SearchTree constructor with the T type parameter by calling it's superclass ? template class SearchTree: protected unique_ptr >{ public: SearchTree(); SearchTree(const T &);…
Agnaroc
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