type

[cc1516.git] / lex.icl

diff --git a/lex.icl b/lex.icl
deleted file mode 100644 (file)
index 6966cde..0000000
--- a/lex.icl
+++ /dev/null
@@ -1,69 +0,0 @@
-implementation module lex
-
-import Control.Monad
-import Data.Either
-import Data.Maybe
-import Data.Map
-import StdString
-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), ('-', DashToken), ('*', 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 ['/':'/':x:rest] = if (x == '\n') (lex rest) (lex ['/':'/':rest])
-lex ['/':'*':x1:x2:rest] = if (x1 == '*' && x2 == '/') 
-       (lex rest) (lex ['/':'*':rest])
-lex ['v':'a':'r':rest] = (Right VarToken, rest)
-lex ['V':'o':'i':'d':rest] = (Right VoidToken, rest)
-lex ['r':'e':'t':'u':'r':'n':rest] = (Right ReturnToken, rest)
-lex ['i':'f':rest] = (Right IfToken, rest)
-lex ['e':'l':'s':'e':rest] = (Right ElseToken, rest)
-lex ['w':'h':'i':'l':'e':rest] = (Right WhileToken, rest)
-lex ['T':'r':'u':'e':rest] = (Right TrueToken, rest)
-lex ['F':'a':'l':'s':'e':rest] = (Right FalseToken, rest)
-lex ['I':'n':'t':rest] = (Right IntTypeToken, rest)
-lex ['C':'h':'a':'r':rest] = (Right CharTypeToken, rest)
-lex ['B':'o':'o':'l':rest] = (Right BoolTypeToken, rest)
-lex [':':':':rest] = (Right DoubleColonToken, rest)
-lex ['!':'=':rest] = (Right NotEqualToken, rest)
-lex ['<':'=':rest] = (Right LesserEqToken, rest)
-lex ['>':'=':rest] = (Right GreaterEqToken, rest)
-lex ['=':'=':rest] = (Right EqualsToken, rest)
-lex ['&':'&':rest] = (Right AmpersandsToken, rest)
-lex ['|':'|':rest] = (Right PipesToken, rest)
-lex ['-':'>':rest] = (Right ArrowToken, rest)
-lex ['\'':x:'\'':rest] = (Right (CharToken x), rest)
-lex ['\'':'\\':x:'\'':rest] = case get x EscapeMap of
-       Just t = (Right (CharToken t), rest)
-       _ = (Left ("Unknown escape: \\" +++ toString x), [])
-lex [x:rest]
-# t = get x SingleCharTokens
-| isJust t = (Right (fromJust t), rest)
-| isSpace x = lex rest
-| isDigit x = let (is, rest`) = span isDigit rest in
-       (Right (NumberToken [x:is]), rest`)
-| isAlpha x = let (is, rest`) = span (\c.isAlphanum c || c == '_') rest in
-       (Right (IdentToken [x:is]), rest`)
-| otherwise = (Left ("Unexpected character: " +++ toString x), [])