language-c-0.3.1.1: Analysis and generation of C code Source code Contents Index

Language.C.Syntax.Constants Portability ghc Stability experimental Maintainer benedikt.huber@gmail.com

Contents Utilities C char constants (and multi-character character constants) C integral constants C floating point constants C string literals

Description

This module provides support for representing, checking and exporting c constants, i.e. integral, float, character and string constants.

Synopsis

escapeChar :: Char -> String unescapeChar :: String -> (Char, String) unescapeString :: String -> String newtype Flags f = Flags Integer noFlags :: Flags f setFlag :: Enum f => f -> Flags f -> Flags f clearFlag :: Enum f => f -> Flags f -> Flags f testFlag :: Enum f => f -> Flags f -> Bool cChar :: Char -> CChar cChar_w :: Char -> CChar cChars :: [Char] -> Bool -> CChar data CChar = CChar !Char !Bool | CChars [Char] !Bool getCChar :: CChar -> [Char] getCCharAsInt :: CChar -> Integer isWideChar :: CChar -> Bool showCharConst :: Char -> ShowS data CIntFlag = FlagUnsigned | FlagLong | FlagLongLong | FlagImag data CIntRepr = DecRepr | HexRepr | OctalRepr cInteger :: Integer -> CInteger data CInteger = CInteger !Integer !CIntRepr !(Flags CIntFlag) getCInteger :: CInteger -> Integer readCInteger :: CIntRepr -> String -> Either String CInteger cFloat :: Float -> CFloat data CFloat = CFloat !String readCFloat :: String -> CFloat cString :: String -> CString cString_w :: String -> CString data CString = CString [Char] Bool getCString :: CString -> String showStringLit :: String -> ShowS concatCStrings :: [CString] -> CString

Utilities

escapeChar :: Char -> String Source

unescapeChar :: String -> (Char, String) Source

unescapeString :: String -> String Source

newtype Flags f Source

Constructors Flags Integer

noFlags :: Flags f Source

setFlag :: Enum f => f -> Flags f -> Flags f Source

clearFlag :: Enum f => f -> Flags f -> Flags f Source

testFlag :: Enum f => f -> Flags f -> Bool Source

C char constants (and multi-character character constants)

cChar :: Char -> CChar Source

construct a character constant from a haskell Char Use cchar_w if you want a wide character constant.

cChar_w :: Char -> CChar Source

construct a wide chararacter constant

cChars :: [Char] -> Bool -> CChar Source

create a multi-character character constant

data CChar Source

C char constants (abstract) Constructors CChar !Char !Bool CChars [Char] !Bool

getCChar :: CChar -> [Char] Source

get the haskell representation of a char constant

getCCharAsInt :: CChar -> Integer Source

get integer value of a C char constant undefined result for multi-char char constants

isWideChar :: CChar -> Bool Source

return true if the character constant is wide.

showCharConst :: Char -> ShowS Source

showCharConst c prepends _a_ String representing the C char constant corresponding to c. If neccessary uses octal or hexadecimal escape sequences.

C integral constants

data CIntFlag Source

datatype representing type flags for integers Constructors FlagUnsigned FlagLong FlagLongLong FlagImag

data CIntRepr Source

datatype for memorizing the representation of an integer Constructors DecRepr HexRepr OctalRepr

cInteger :: Integer -> CInteger Source

construct a integer constant (without type flags) from a haskell integer

data CInteger Source

Constructors CInteger !Integer !CIntRepr !(Flags CIntFlag)

getCInteger :: CInteger -> Integer Source

readCInteger :: CIntRepr -> String -> Either String CInteger Source

C floating point constants

cFloat :: Float -> CFloat Source

data CFloat Source

Floats (represented as strings) Constructors CFloat !String

readCFloat :: String -> CFloat Source

C string literals

cString :: String -> CString Source

cString_w :: String -> CString Source

data CString Source

C String literals Constructors CString [Char] Bool

getCString :: CString -> String Source

showStringLit :: String -> ShowS Source

showStringLiteral s prepends a String representing the C string literal corresponding to s. If neccessary it uses octal or hexadecimal escape sequences.

concatCStrings :: [CString] -> CString Source

concatenate a list of C string literals

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