ghc-exactprint-0.6.3.4: ExactPrint for GHC

Description

This module rexposes wrapped parsers from the GHC API. Along with returning the parse result, the corresponding annotations are also returned such that it is then easy to modify the annotations and print the result.

Synopsis

# Utility

withDynFlags :: (DynFlags -> a) -> IO a Source #

Provides a safe way to consume a properly initialised set of DynFlags.

myParser fname expr = withDynFlags (\d -> parseExpr d fname expr)


Constructors

 CppOptions FieldscppDefine :: [String]CPP #define macroscppInclude :: [FilePath]CPP Includes directorycppFile :: [FilePath]CPP pre-include file

# Module Parsers

This entry point will also work out which language extensions are required and perform CPP processing if necessary.

parseModule = parseModuleWithCpp defaultCppOptions


Note: ParsedSource is a synonym for Located (HsModule GhcPs)

This entry point will work out which language extensions are required but will _not_ perform CPP processing. In contrast to parseModoule the input source is read from the provided string; the FilePath parameter solely exists to provide a name in source location annotations.

Parse a module with specific instructions for the C pre-processor.

# Basic Parsers

parseWith :: (Data (SrcSpanLess w), Annotate w, HasSrcSpan w) => DynFlags -> FilePath -> P w -> String -> ParseResult w Source #

Wrapper function which returns Annotations along with the parsed element.

# Internal

ghcWrapper :: Ghc a -> IO a Source #

Internal function. Default runner of GHC.Ghc action in IO.

Internal function. Initializes DynFlags value for parsing.

Passes "-hide-all-packages" to the GHC API to prevent parsing of package environment files. However this only works if there is no invocation of setSessionDynFlags before calling initDynFlags. See ghc tickets 15541.

Requires GhcMonad constraint because there is no pure variant of parseDynamicFilePragma. Yet, in constrast to initDynFlags, it does not (try to) read the file at filepath, but solely depends on the module source in the input string.

Passes "-hide-all-packages" to the GHC API to prevent parsing of package environment files. However this only works if there is no invocation of setSessionDynFlags before calling initDynFlagsPure. See ghc tickets 15541.

Internal part of parseModuleFromString.

Low level function which is used in the internal tests. It is advised to use parseModule or parseModuleWithCpp instead of this function.

Internal function. Exposed if you want to muck with DynFlags before parsing.

Internal function. Exposed if you want to muck with DynFlags before parsing. Or after parsing.