Plugins

Documentation

data FrontendPlugin

Constructors

FrontendPlugin

Fields

• frontend :: FrontendPluginAction

defaultFrontendPlugin :: FrontendPlugin

type FrontendPluginAction = [String] -> [(String, Maybe Phase)] -> Ghc ()

data Plugin

Plugin is the compiler plugin data type. Try to avoid constructing one of these directly, and just modify some fields of defaultPlugin instead: this is to try and preserve source-code compatibility when we add fields to this.

Nonetheless, this API is preliminary and highly likely to change in the future.

Constructors

Plugin

Fields

• installCoreToDos :: CorePlugin

  Modify the Core pipeline that will be used for compilation. This is called as the Core pipeline is built for every module being compiled, and plugins get the opportunity to modify the pipeline in a nondeterministic order.

• tcPlugin :: TcPlugin

  An optional typechecker plugin, which may modify the behaviour of the constraint solver.

• pluginRecompile :: [CommandLineOption] -> IO PluginRecompile

  Specify how the plugin should affect recompilation.

• parsedResultAction :: [CommandLineOption] -> ModSummary -> HsParsedModule -> Hsc HsParsedModule

  Modify the module when it is parsed. This is called by HscMain when the parsing is successful.

• renamedResultAction :: [CommandLineOption] -> TcGblEnv -> HsGroup GhcRn -> TcM (TcGblEnv, HsGroup GhcRn)

  Modify each group after it is renamed. This is called after each HsGroup has been renamed.

• typeCheckResultAction :: [CommandLineOption] -> ModSummary -> TcGblEnv -> TcM TcGblEnv

  Modify the module when it is type checked. This is called add the very end of typechecking.

• spliceRunAction :: [CommandLineOption] -> LHsExpr GhcTc -> TcM (LHsExpr GhcTc)

  Modify the TH splice or quasiqoute before it is run.

• interfaceLoadAction :: forall lcl. [CommandLineOption] -> ModIface -> IfM lcl ModIface

  Modify an interface that have been loaded. This is called by LoadIface when an interface is successfully loaded. Not applied to the loading of the plugin interface. Tools that rely on information from modules other than the currently compiled one should implement this function.

type CommandLineOption = String

Command line options gathered from the -PModule.Name:stuff syntax are given to you as this type

data LoadedPlugin

A plugin with its arguments. The result of loading the plugin.

Constructors

LoadedPlugin

Fields

• lpPlugin :: Plugin

  the actual callable plugin

• lpModule :: ModIface

  the module containing the plugin

• lpArguments :: [CommandLineOption]

  command line arguments for the plugin

lpModuleName :: LoadedPlugin -> ModuleName

defaultPlugin :: Plugin

Default plugin: does nothing at all! For compatibility reasons you should base all your plugin definitions on this default value.

keepRenamedSource :: [CommandLineOption] -> TcGblEnv -> HsGroup GhcRn -> TcM (TcGblEnv, HsGroup GhcRn)

A renamer plugin which mades the renamed source available in a typechecker plugin.

withPlugins :: Monad m => DynFlags -> PluginOperation m a -> a -> m a

Perform an operation by using all of the plugins in turn.

withPlugins_ :: Monad m => DynFlags -> ConstPluginOperation m a -> a -> m ()

Perform a constant operation by using all of the plugins in turn.

data PluginRecompile

Constructors

ForceRecompile

NoForceRecompile

MaybeRecompile Fingerprint

Instances

Semigroup PluginRecompile

Defined in Plugins

Methods

(<>) :: PluginRecompile -> PluginRecompile -> PluginRecompile

sconcat :: NonEmpty PluginRecompile -> PluginRecompile

stimes :: Integral b => b -> PluginRecompile -> PluginRecompile

Monoid PluginRecompile

Defined in Plugins

Methods

mempty :: PluginRecompile

mappend :: PluginRecompile -> PluginRecompile -> PluginRecompile

mconcat :: [PluginRecompile] -> PluginRecompile

Outputable PluginRecompile

Defined in Plugins

Methods

ppr :: PluginRecompile -> SDoc

pprPrec :: Rational -> PluginRecompile -> SDoc

purePlugin :: [CommandLineOption] -> IO PluginRecompile

impurePlugin :: [CommandLineOption] -> IO PluginRecompile

flagRecompile :: [CommandLineOption] -> IO PluginRecompile