ignore SPACE ::= \s+
ignore NEWLINE ::= \n
ignore COMMENT ::= //[^\n]*\n
ignore MULTICOMMENT ::= /\*([^*]|\*[^/])*\*/
(unclosed comment)
unwanted EMULTICMMENT ::= /\*([^*]|\*[^/])*
(an include)
INCLUDE ::= #include\s*<[^>]*>\s*
(`<`)
LT ::= <
(`>`)
GT ::= >
(`(`)
LPAR ::= \(
(`\)`)
RPAR ::= \)
(`{`)
LBRACE ::= {
(`}`)
RBRACE ::= }
(`[`)
LBRACKET ::= \[
(`]`)
RBRACKET ::= \]
(`bool`)
keyword BOOL ::= bool
(`break`)
keyword BREAK ::= break
(`continue`)
keyword CONTINUE ::= continue
(`else`)
keyword ELSE ::= else
(`false`)
keyword FALSE ::= false
(`true`)
keyword TRUE ::= true
(`for`)
keyword FOR ::= for
(`if`)
keyword IF ::= if
(`int`)
keyword INTTY ::= int
(`null`)
keyword NULL ::= NULL
(`return`)
keyword RETURN ::= return
(`sizeof`)
keyword SIZEOF ::= sizeof
(`void`)
keyword VOID ::= void
(`while`)
keyword WHILE ::= while
(an integer)
INT ::= (0|[1-9][0-9]*)
(a character)
CHAR ::= '([ -&(-[\]-~]|\\\\|\\'|\\n|\\t)'
(`'` has to be escaped in a literal `char`)
unwanted UEACHAR ::= '''
(`\\` has to be escaped in a literal `char`)
unwanted UEBCHAR ::= '\\'
(unclosed character)
unwanted UECCHAR ::= '.[^']
(an identifier)
IDENT ::= ([a-zA-Z_][a-zA-Z_0-9]*)
(`,`)
COMMA ::= ,
(`;`)
SEMICOLON ::= ;
(`*`)
ASTERISK ::= \*
(`++`)
PLUSPLUS ::= \+\+
(`--`)
MINUSMINUS ::= --
(`&`)
AMPERSAND ::= &
(`!`)
EXCLAM ::= !
(`+`)
PLUS ::= \+
(`-`)
MINUS ::= -
(`=`)
EQUAL ::= =
(`==`)
EQ ::= ==
(`!=`)
NEQ ::= !=
(`<=`)
LEQ ::= <=
(`>=`)
GEQ ::= >=
(`/`)
SLASH ::= /
(`%`)
PERCENT ::= %
(`&&`)
AND ::= &&
(`||`)
OR ::= \|\|
(`.`)
DOT ::= \.
(`->`)
ARROW ::= ->