type

[cc1516.git] / lex.icl

diff --git a/lex.icl b/lex.icl
deleted file mode 100644 (file)
index 0adb20c..0000000
--- a/lex.icl
+++ /dev/null
@@ -1,72 +0,0 @@
-implementation module lex
-
-import Control.Monad
-import Data.Either
-import Data.Maybe
-import Data.Map
-import Data.Func
-import StdString
-import StdTuple
-import StdBool
-import StdList
-import StdChar
-import qualified Text
-
-SingleCharTokens :: Map Char Token
-SingleCharTokens = fromList [
-       ('(', BraceOpenToken), (')', BraceCloseToken), ('{', CBraceOpenToken),
-       ('}', CBraceCloseToken), ('[', SquareOpenToken), (']', SquareCloseToken),
-       (',', CommaToken), (':', ColonToken), (';', SColonToken),
-       ('.', DotToken), ('+', PlusToken), ('*', StarToken), ('/', SlashToken),
-       ('%', PercentToken), ('=', AssignmentToken), ('<', LesserToken),
-       ('>', BiggerToken), ('!', ExclamationToken)]
-
-EscapeMap :: Map Char Char
-EscapeMap = fromList [('a', toChar 7), ('b', '\b'), ('f', '\f'), ('n', '\n'),
-       ('r', '\r'), ('t', '\t'), ('v', '\v')]
-
-lexer :: [Char] -> LexerOutput
-lexer [] = Right []
-lexer x = case lex x of
-       (Right t, rest) = lexer rest >>= \ts.Right [t:ts]
-       (Left e, _) = Left e
-
-lex :: [Char] -> (Either String Token, [Char])
-lex [] = (Right EndOfFileToken, [])
-lex ['/':'/':xs] = lex $ dropWhile ((<>) '\n') xs
-lex ['/':'*':xs] =
-       lex $ tl $ map snd $ dropWhile ((<>) ('*', '/')) $ zip2 [zero:xs] xs
-lex ['v':'a':'r':xs] = (Right VarToken, xs)
-lex ['V':'o':'i':'d':xs] = (Right VoidToken, xs)
-lex ['r':'e':'t':'u':'r':'n':xs] = (Right ReturnToken, xs)
-lex ['i':'f':xs] = (Right IfToken, xs)
-lex ['e':'l':'s':'e':xs] = (Right ElseToken, xs)
-lex ['w':'h':'i':'l':'e':xs] = (Right WhileToken, xs)
-lex ['T':'r':'u':'e':xs] = (Right TrueToken, xs)
-lex ['F':'a':'l':'s':'e':xs] = (Right FalseToken, xs)
-lex ['I':'n':'t':xs] = (Right IntTypeToken, xs)
-lex ['C':'h':'a':'r':xs] = (Right CharTypeToken, xs)
-lex ['B':'o':'o':'l':xs] = (Right BoolTypeToken, xs)
-lex [':':':':xs] = (Right DoubleColonToken, xs)
-lex ['!':'=':xs] = (Right NotEqualToken, xs)
-lex ['<':'=':xs] = (Right LesserEqToken, xs)
-lex ['>':'=':xs] = (Right GreaterEqToken, xs)
-lex ['=':'=':xs] = (Right EqualsToken, xs)
-lex ['&':'&':xs] = (Right AmpersandsToken, xs)
-lex ['|':'|':xs] = (Right PipesToken, xs)
-lex ['-':'>':xs] = (Right ArrowToken, xs)
-lex ['\'':x:'\'':xs] = (Right (CharToken x), xs)
-lex ['\'':'\\':x:'\'':xs] = case get x EscapeMap of
-       Just t = (Right (CharToken t), xs)
-       _ = (Left ("Unknown escape: \\" +++ toString x), [])
-lex ['-':t=:[x:xs]]
-| isDigit x = let (i, r) = span isDigit t in (Right (NumberToken ['-':i]), r)
-| otherwise = (Right DashToken, xs)
-lex t=:[x:xs] = case get x SingleCharTokens of
-       (Just tok) = (Right tok, xs)
-       Nothing
-       | isSpace x = lex xs
-       | isDigit x = let (i, r) = span isDigit t in (Right (NumberToken i), r)
-       | isAlpha x = let (i, r) = span isIdent t in (Right (IdentToken i), r)
-               with isIdent c = isAlphanum c || c == '_'
-       | otherwise = (Left ("Unexpected character: " +++ toString x), [])