LexerParserGenerator/cocolJava.txt at master · fcpauldiaz-archive/LexerParserGenerator · GitHub

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COMPILER LexerAnalyzer

CHARACTERS

tab           = CHR(09).
lf            = CHR(10).
cr            = CHR(13).
zero          = '0'.
zeroToThree   = zero + "123" .
octalDigit    = zero + "1234567" .
nonZeroDigit  = "123456789".
digit         = '0' + nonZeroDigit .
hexDigit      = digit + "ABCDEFabcdef" .
letter        = 'A' .. 'Z' + 'a' .. 'z' + '$'.
some_chars 	  = CHR(33)..CHR(39).
escape_chars  = some_chars + "\\".
char          = ANY - "'" - "\\" - cr - lf.
stringChar    = ANY - "\"" - "\\"- cr - lf.

KEYWORDS

if 		= "if".
while   = "while".
boolean = "boolean".
byte    = "byte".
char    = "char".
class   = "class".
double  = "double".
false   = "false".
final   = "final".
float   = "float".
int     = "int".
long    = "long".
new     = "new".
null    = "null".
short   = "short".
static  = "static".
super   = "super".
this    = "this".
true    = "true".
void    = "void".
colon   = ":".
comma   = ",".
dec     = "--".
dot     = ".".
inc     = "++".
lbrace  = "{".
lbrack  = "[".
lpar    = "(".
minus   = "-".
not     = "!".
plus    = "+".
rbrace  = "}".
rbrack  = "]".
rpar    = ")".
tilde   = "~".
igual   = "=".

TOKENS

letter = letter{letter} EXCEPT KEYWORDS.
ident1 = letter {'_'} '*'.
number = digit {digit}
         | digit {digit} '.' {digit} ['E' ['+'|'-'] digit {digit}].
intLit =
  (  zero | nonZeroDigit { digit }
  | ( "0x" | "0X" ) hexDigit { hexDigit }
  | '0' octalDigit { octalDigit }
  ) [ "l" | "L" ].

charLit =
"'" ( char
    | "\\" ( "b" | "t" | "n" | "f" | "r" | "\"" | "\'" | "\\"
           | "u" { "u" } hexDigit hexDigit hexDigit hexDigit
           | zeroToThree [ octalDigit ] [ octalDigit ]
           | octalDigit [ octalDigit ]
           )
    )
"'".
stringLit =
    "\"" { stringChar
         | "\\" ( "b" | "t" | "n" | "f" | "r" | "\"" | "\'" | "\\"
                | "u" { "u" } hexDigit hexDigit hexDigit hexDigit
                | zeroToThree [ octalDigit ] [ octalDigit ]
                | octalDigit [ octalDigit ]
                )
         }
    "\"" EXCEPT KEYWORDS.

 floatLit =
    "." digit {digit}
    [("e" | "E") ["+" | "-"] digit {digit}]
    [ "F" | "f" | "D" | "d" ]
  | digit {digit}
    ( "." {digit}
      [("e" | "E" ) ["+" | "-"] digit {digit} ]
      [ "F" | "f" | "D" | "d" ]
    | ("e" | "E") ["+" | "-"] digit {digit}
      [ "F" | "f" | "D" | "d" ]
    | "F" | "f" | "D" | "d"
    ).


IGNORE " ".

END LexerAnalyzer.