ghc-9.10.3: The GHC API

Safe Haskell | None
Language | GHC2021

GHC.Iface.Load

Description

Loading interface files

Synopsis

- tcLookupImported_maybe :: Name -> TcM (MaybeErr IfaceMessage TyThing)
- importDecl :: Name -> IfM lcl (MaybeErr IfaceMessage TyThing)
- checkWiredInTyCon :: TyCon -> TcM ()
- ifCheckWiredInThing :: TyThing -> IfL ()
- loadModuleInterface :: SDoc -> Module -> TcM ModIface
- loadModuleInterfaces :: SDoc -> [Module] -> TcM ()
- loadSrcInterface :: SDoc -> ModuleName -> IsBootInterface -> PkgQual -> RnM ModIface
- loadSrcInterface_maybe :: SDoc -> ModuleName -> IsBootInterface -> PkgQual -> RnM (MaybeErr MissingInterfaceError ModIface)
- loadInterfaceForName :: SDoc -> Name -> TcRn ModIface
- loadInterfaceForModule :: SDoc -> Module -> TcRn ModIface
- loadInterface :: SDoc -> Module -> WhereFrom -> IfM lcl (MaybeErr MissingInterfaceError ModIface)
- loadSysInterface :: SDoc -> Module -> IfM lcl ModIface
- loadUserInterface :: IsBootInterface -> SDoc -> Module -> IfM lcl ModIface
- loadPluginInterface :: SDoc -> Module -> IfM lcl ModIface
- findAndReadIface :: HscEnv -> SDoc -> InstalledModule -> Module -> IsBootInterface -> IO (MaybeErr MissingInterfaceError (ModIface, FilePath))
- readIface :: DynFlags -> NameCache -> Module -> FilePath -> IO (MaybeErr ReadInterfaceError ModIface)
- writeIface :: Logger -> Profile -> FilePath -> ModIface -> IO ()
- moduleFreeHolesPrecise :: SDoc -> Module -> TcRnIf gbl lcl (MaybeErr MissingInterfaceError (UniqDSet ModuleName))
- needWiredInHomeIface :: TyThing -> Bool
- loadWiredInHomeIface :: Name -> IfM lcl ()
- data WhereFrom
  - = ImportByUser IsBootInterface
  - | ImportBySystem
  - | ImportByPlugin
- pprModIfaceSimple :: UnitState -> ModIface -> SDoc
- ifaceStats :: ExternalPackageState -> SDoc
- pprModIface :: UnitState -> ModIface -> SDoc
- showIface :: Logger -> DynFlags -> UnitState -> NameCache -> FilePath -> IO ()
- module GHC.Iface.Errors

# Documentation

tcLookupImported_maybe :: Name -> TcM (MaybeErr IfaceMessage TyThing) Source #

importDecl :: Name -> IfM lcl (MaybeErr IfaceMessage TyThing) Source #

checkWiredInTyCon :: TyCon -> TcM () Source #

ifCheckWiredInThing :: TyThing -> IfL () Source #

loadModuleInterface :: SDoc -> Module -> TcM ModIface Source #

Load interface directly for a fully qualified `Module`. (This is a fairly rare operation, but in particular it is used to load orphan modules in order to pull their instances into the global package table and to handle some operations in GHCi).

loadModuleInterfaces :: SDoc -> [Module] -> TcM () Source #

Load interfaces for a collection of modules.

loadSrcInterface :: SDoc -> ModuleName -> IsBootInterface -> PkgQual -> RnM ModIface Source #

Load the interface corresponding to an `import` directive in source code. On a failure, fail in the monad with an error message.

loadSrcInterface_maybe :: SDoc -> ModuleName -> IsBootInterface -> PkgQual -> RnM (MaybeErr MissingInterfaceError ModIface) Source #

Like `loadSrcInterface`, but returns a `MaybeErr`.

loadInterfaceForName :: SDoc -> Name -> TcRn ModIface Source #

Loads the interface for a given Name. Should only be called for an imported name; otherwise loadSysInterface may not find the interface

loadInterfaceForModule :: SDoc -> Module -> TcRn ModIface Source #

Loads the interface for a given Module.

loadInterface :: SDoc -> Module -> WhereFrom -> IfM lcl (MaybeErr MissingInterfaceError ModIface) Source #

loadSysInterface :: SDoc -> Module -> IfM lcl ModIface Source #

Loads a system interface and throws an exception if it fails

loadUserInterface :: IsBootInterface -> SDoc -> Module -> IfM lcl ModIface Source #

Loads a user interface and throws an exception if it fails. The first parameter indicates whether we should import the boot variant of the module

loadPluginInterface :: SDoc -> Module -> IfM lcl ModIface Source #

findAndReadIface Source #

Arguments

:: HscEnv |
-> SDoc | Reason for loading the iface (used for tracing)
-> InstalledModule | The unique identifier of the on-disk module we're looking for
-> Module | The *actual* module we're looking for. We use this to check the consistency of the requirements of the module we read out.
-> IsBootInterface | Looking for .hi-boot or .hi file
-> IO (MaybeErr MissingInterfaceError (ModIface, FilePath)) |

readIface :: DynFlags -> NameCache -> Module -> FilePath -> IO (MaybeErr ReadInterfaceError ModIface) Source #

`readIface` tries just the one file.

Failed err = file not found, or unreadable, or illegible Succeeded iface = successfully found and parsed

writeIface :: Logger -> Profile -> FilePath -> ModIface -> IO () Source #

Write interface file

moduleFreeHolesPrecise :: SDoc -> Module -> TcRnIf gbl lcl (MaybeErr MissingInterfaceError (UniqDSet ModuleName)) Source #

Compute the signatures which must be compiled in order to load the interface for a `Module`. The output of this function is always a subset of `moduleFreeHoles`; it is more precise because in signature `p[A=<A>,B=<B>]:B`, although the free holes are A and B, B might not depend on A at all!

If this is invoked on a signature, this does NOT include the signature itself; e.g. precise free module holes of `p[A=<A>,B=<B>]:B` never includes B.

needWiredInHomeIface :: TyThing -> Bool Source #

loadWiredInHomeIface :: Name -> IfM lcl () Source #

An `IfM` function to load the home interface for a wired-in thing, so that we're sure that we see its instance declarations and rules See Note [Loading instances for wired-in things]

data WhereFrom Source #

Reason for loading an interface file

Used to figure out whether we want to consider loading hi-boot files or not.

Constructors

ImportByUser IsBootInterface |
ImportBySystem |
ImportByPlugin |

#### Instances

Instances details

Outputable WhereFrom Source # |
Instance details Defined in GHC.Iface.Load Methods ppr :: WhereFrom -> SDoc Source #

pprModIfaceSimple :: UnitState -> ModIface -> SDoc Source #

Show a ModIface but don't display details; suitable for ModIfaces stored in the EPT.

ifaceStats :: ExternalPackageState -> SDoc Source #

pprModIface :: UnitState -> ModIface -> SDoc Source #

Show a ModIface

The UnitState is used to pretty-print units

showIface :: Logger -> DynFlags -> UnitState -> NameCache -> FilePath -> IO () Source #

Read binary interface, and print it out

module GHC.Iface.Errors