Safe Haskell	None
Language	Haskell98

Annotations

Contents

Main Annotation data types
AnnEnv for collecting and querying Annotations

Description

Support for source code annotation feature of GHC. That is the ANN pragma.

(c) The University of Glasgow 2006 (c) The GRASP/AQUA Project, Glasgow University, 1992-1998

Synopsis

Main Annotation data types

data Annotation Source

Represents an annotation after it has been sufficiently desugared from it's initial form of AnnDecl

Constructors

Annotation
Fields ann_target :: CoreAnnTarget The target of the annotation ann_value :: AnnPayload

Instances

Outputable Annotation

type AnnPayload Source

Arguments

= Serialized

The "payload" of an annotation allows recovery of its value at a given type, and can be persisted to an interface file

data AnnTarget name Source

An annotation target

Constructors

NamedTarget name	We are annotating something with a name: a type or identifier
ModuleTarget Module	We are annotating a particular module

Instances

Functor AnnTarget
Outputable name => Outputable (AnnTarget name)
Uniquable name => Uniquable (AnnTarget name)
Binary name => Binary (AnnTarget name)

type CoreAnnTarget = AnnTarget Name Source

The kind of annotation target found in the middle end of the compiler

getAnnTargetName_maybe :: AnnTarget name -> Maybe name Source

Get the name of an annotation target if it exists.

AnnEnv for collecting and querying Annotations

data AnnEnv Source

A collection of annotations Can't use a type synonym or we hit bug #2412 due to source import

mkAnnEnv :: [Annotation] -> AnnEnv Source

Construct a new annotation environment that contains the list of annotations provided.

extendAnnEnvList :: AnnEnv -> [Annotation] -> AnnEnv Source

Add the given annotation to the environment.

plusAnnEnv :: AnnEnv -> AnnEnv -> AnnEnv Source

Union two annotation environments.

emptyAnnEnv :: AnnEnv Source

An empty annotation environment.

findAnns :: Typeable a => ([Word8] -> a) -> AnnEnv -> CoreAnnTarget -> [a] Source

Find the annotations attached to the given target as Typeable values of your choice. If no deserializer is specified, only transient annotations will be returned.

deserializeAnns :: Typeable a => ([Word8] -> a) -> AnnEnv -> UniqFM [a] Source

Deserialize all annotations of a given type. This happens lazily, that is no deserialization will take place until the [a] is actually demanded and the [a] can also be empty (the UniqFM is not filtered).