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#
# sample1.rex
# lexical definition sample for rex
#
# usage
# rex sample1.rex --stub
# ruby sample1.rex.rb sample1.c
#
class Sample1
macro
BLANK \s+
REM_IN \/\*
REM_OUT \*\/
REM \/\/
rule
# [:state] pattern [actions]
# remark
{REM_IN} { self.state = :REMS; [:rem_in, text] }
:REMS {REM_OUT} { self.state = nil; [:rem_out, text] }
:REMS .*(?={REM_OUT}) { [:remark, text] }
{REM} { self.state = :REM; [:rem_in, text] }
:REM \n { self.state = nil; [:rem_out, text] }
:REM .*(?=$) { [:remark, text] }
# literal
\"[^"]*\" { [:string, text] } # "
\'[^']\' { [:character, text] } # '
# skip
{BLANK} # no action
# numeric
\d+ { [:digit, text.to_i] }
# identifier
\w+ { [:word, text] }
. { [text, text] }
end
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