cpphs Source code Contents Index

Language.Preprocessor.Cpphs.HashDefine Portability All Stability experimental Maintainer Malcolm Wallace <Malcolm.Wallace@cs.york.ac.uk>

Description

What structures are declared in a #define.

Synopsis

data HashDefine = LineDrop { name :: String } | Pragma { name :: String } | SymbolReplacement { name :: String replacement :: String linebreaks :: Int } | MacroExpansion { name :: String arguments :: [String] expansion :: [(ArgOrText, String)] linebreaks :: Int } data ArgOrText = Arg | Text | Str expandMacro :: HashDefine -> [String] -> Bool -> String parseHashDefine :: Bool -> [String] -> Maybe HashDefine

Documentation

data HashDefine Source

Constructors LineDrop name :: String Pragma name :: String SymbolReplacement name :: String replacement :: String linebreaks :: Int MacroExpansion name :: String arguments :: [String] expansion :: [(ArgOrText, String)] linebreaks :: Int Instances Eq HashDefine Show HashDefine

data ArgOrText Source

Macro expansion text is divided into sections, each of which is classified as one of three kinds: a formal argument (Arg), plain text (Text), or a stringised formal argument (Str). Constructors Arg Text Str Instances Eq ArgOrText Show ArgOrText

expandMacro :: HashDefine -> [String] -> Bool -> String Source

Expand an instance of a macro. Precondition: got a match on the macro name.

parseHashDefine :: Bool -> [String] -> Maybe HashDefine Source

Parse a #define, or #undef, ignoring other # directives

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