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GHC 9.14.1 · lts/ghc-9.14.x · 45dd537 · 2026-10-11

ModuleBNFC-2.9.6.3Haskell2010

BNFC.Lex

11 types
38 values

PackageBNFC-2.9.6.3
Exports50
LanguageHaskell2010
LicenceBSD-3-Clause
SourceLex.x

valuealex_tab_size :: Int

valuealex_base :: AlexAddr

valuealex_table :: AlexAddr

valuealex_check :: AlexAddr

valuealex_deflt :: AlexAddr

valuealex_accept :: Array Int (AlexAcc user)

valuealex_actions :: Array Int (Posn -> [Char] -> Token)

valuealex_action_3 :: Posn -> String -> Token

valuealex_action_4 :: Posn -> String -> Token

valuealex_action_5 :: Posn -> String -> Token

valuealex_action_6 :: Posn -> String -> Token

valuealex_action_7 :: Posn -> String -> Token

valuealex_action_8 :: Posn -> String -> Token

valuealex_action_9 :: Posn -> String -> Token

datadata AlexAddr

Constructors

AlexA# Addr#

valuealexIndexInt16OffAddr :: AlexAddr -> Int# -> Int#

valuealexIndexInt32OffAddr :: AlexAddr -> Int# -> Int#

valuequickIndex :: Array Int (AlexAcc (ZonkAny 0)) -> Int -> AlexAcc (ZonkAny 0)

datadata AlexReturn a

Constructors

AlexEOF
AlexError !AlexInput
AlexSkip !AlexInput !Int
AlexToken !AlexInput !Int a

valuealexScan

:: (Posn, Char, [Byte], String)
-> Int
-> AlexReturn (Posn -> [Char] -> Token)

valuealexScanUser

:: t
-> (Posn, Char, [Byte], String)
-> Int
-> AlexReturn (Posn -> [Char] -> Token)

valuealex_scan_tkn

:: t1
-> t2
-> Int#
-> (Posn, Char, [Byte], String)
-> Int#
-> AlexLastAcc
-> (AlexLastAcc, (Posn, Char, [Byte], String))

datadata AlexLastAcc

Constructors

AlexNone
AlexLastAcc !Int !AlexInput !Int
AlexLastSkip !AlexInput !Int

datadata AlexAcc user

Constructors

AlexAccNone
AlexAcc Int
AlexAccSkip

valuetok :: (String -> Tok) -> Posn -> String -> Token

Create a token with position.

datadata Tok

Token without position.

Constructors

TK !TokSymbol
Reserved word or symbol.
TL !String
String literal.
TI !String
Integer literal.
TV !String
Identifier.
TD !String
Float literal.
TC !String
Character literal.
T_Identifier !String

Instances3Eq, Ord, Show

Eq TokDefined in BNFC-2.9.6.3 · BNFC.Lex
Ord TokDefined in BNFC-2.9.6.3 · BNFC.Lex
Show TokDefined in BNFC-2.9.6.3 · BNFC.Lex

patternpattern TS :: String -> Int -> Tok

Smart constructor for Tok for the sake of backwards compatibility.

datadata TokSymbol

Keyword or symbol tokens have a unique ID.

Constructors

TokSymbol
- tsText :: String
  Keyword or symbol text.
- tsID :: !Int
  Unique ID.

Instances3Eq, Ord, Show

Eq TokSymbolDefined in BNFC-2.9.6.3 · BNFC.Lex
Keyword/symbol equality is determined by the unique ID.
Ord TokSymbolDefined in BNFC-2.9.6.3 · BNFC.Lex
Keyword/symbol ordering is determined by the unique ID.
Show TokSymbolDefined in BNFC-2.9.6.3 · BNFC.Lex

datadata Token

Token with position.

Constructors

PT Posn Tok
Err Posn

Instances3Eq, Ord, Show

Eq TokenDefined in BNFC-2.9.6.3 · BNFC.Lex
Ord TokenDefined in BNFC-2.9.6.3 · BNFC.Lex
Show TokenDefined in BNFC-2.9.6.3 · BNFC.Lex

valueprintPosn :: Posn -> String

Pretty print a position.

valuetokenPos :: [Token] -> String

Pretty print the position of the first token in the list.

valuetokenPosn :: Token -> Posn

Get the position of a token.

valuetokenLineCol :: Token -> (Int, Int)

Get line and column of a token.

valueposLineCol :: Posn -> (Int, Int)

Get line and column of a position.

valuemkPosToken :: Token -> ((Int, Int), String)

Convert a token into "position token" form.

valuetokenText :: Token -> String

Convert a token to its text.

valueprToken :: Token -> String

Convert a token to a string.

datadata BTree

Finite map from text to token organized as binary search tree.

Constructors

N
Nil (leaf).
B String Tok BTree BTree
Binary node.

Instances1Show

Show BTreeDefined in BNFC-2.9.6.3 · BNFC.Lex

valueeitherResIdent :: (String -> Tok) -> String -> Tok

Convert potential keyword into token or use fallback conversion.

valueresWords :: BTree

The keywords and symbols of the language organized as binary search tree.

valueunescapeInitTail :: String -> String

Unquote string literal.

datadata Posn

Constructors

Pn !Int !Int !Int

Instances3Eq, Ord, Show

Eq PosnDefined in BNFC-2.9.6.3 · BNFC.Lex
Ord PosnDefined in BNFC-2.9.6.3 · BNFC.Lex
Show PosnDefined in BNFC-2.9.6.3 · BNFC.Lex

valuealexStartPos :: Posn

valuealexMove :: Posn -> Char -> Posn

typetype Byte = Word8

typetype AlexInput = (Posn, Char, [Byte], String)

valuetokens :: String -> [Token]

valuealexGetByte :: AlexInput -> Maybe (Byte, AlexInput)

valuealexInputPrevChar :: AlexInput -> Char

valueutf8Encode :: Char -> [Word8]

Encode a Haskell String to a list of Word8 values, in UTF8 format.