ghc-7.10.3: The GHC API

Safe HaskellNone




The ModuleName type

data ModuleName Source

A ModuleName is essentially a simple string, e.g. Data.List.

moduleNameSlashes :: ModuleName -> String Source

Returns the string version of the module name, with dots replaced by slashes.

moduleNameColons :: ModuleName -> String Source

Returns the string version of the module name, with dots replaced by underscores.

stableModuleNameCmp :: ModuleName -> ModuleName -> Ordering Source

Compares module names lexically, rather than by their Uniques

The PackageKey type

data PackageKey Source

A string which uniquely identifies a package. For wired-in packages, it is just the package name, but for user compiled packages, it is a hash. ToDo: when the key is a hash, we can do more clever things than store the hex representation and hash-cons those strings.

stablePackageKeyCmp :: PackageKey -> PackageKey -> Ordering Source

Compares package ids lexically, rather than by their Uniques

Wired-in PackageKeys

Certain packages are known to the compiler, in that we know about certain entities that reside in these packages, and the compiler needs to declare static Modules and Names that refer to these packages. Hence the wired-in packages can't include version numbers, since we don't want to bake the version numbers of these packages into GHC.

So here's the plan. Wired-in packages are still versioned as normal in the packages database, and you can still have multiple versions of them installed. However, for each invocation of GHC, only a single instance of each wired-in package will be recognised (the desired one is selected via -package/-hide-package), and GHC will use the unversioned PackageKey below when referring to it, including in .hi files and object file symbols. Unselected versions of wired-in packages will be ignored, as will any other package that depends directly or indirectly on it (much as if you had used -ignore-package).

mainPackageKey :: PackageKey Source

This is the package Id for the current program. It is the default package Id if you don't specify a package name. We don't add this prefix to symbol names, since there can be only one main package per program.

The Module type

stableModuleCmp :: Module -> Module -> Ordering Source

This gives a stable ordering, as opposed to the Ord instance which gives an ordering based on the Uniques of the components, which may not be stable from run to run of the compiler.

class HasModule m where Source


getModule :: m Module Source


The ModuleLocation type

data ModLocation Source

Where a module lives on the file system: the actual locations of the .hs, .hi and .o files, if we have them

addBootSuffix :: FilePath -> FilePath Source

Add the -boot suffix to .hs, .hi and .o files

addBootSuffix_maybe :: Bool -> FilePath -> FilePath Source

Add the -boot suffix if the Bool argument is True

addBootSuffixLocn :: ModLocation -> ModLocation Source

Add the -boot suffix to all file paths associated with the module

Module mappings

data ModuleEnv elt Source

A map keyed off of Modules

extendModuleEnvList_C :: (a -> a -> a) -> ModuleEnv a -> [(Module, a)] -> ModuleEnv a Source

plusModuleEnv_C :: (a -> a -> a) -> ModuleEnv a -> ModuleEnv a -> ModuleEnv a Source

mapModuleEnv :: (a -> b) -> ModuleEnv a -> ModuleEnv b Source

foldModuleEnv :: (a -> b -> b) -> b -> ModuleEnv a -> b Source

extendModuleEnvWith :: (a -> a -> a) -> ModuleEnv a -> Module -> a -> ModuleEnv a Source

ModuleName mappings

type ModuleNameEnv elt = UniqFM elt Source

A map keyed off of ModuleNames (actually, their Uniques)

Sets of Modules

type ModuleSet = Map Module () Source

A set of Modules