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%{
#include "lex-ere.tab.h"
%}
%x CHARACTER_CLASS
%%
"[=" return Open_equal;
"=]" return Equal_close;
"[." return Open_dot;
".]" return Dot_close;
j
"[:" {
BEGIN CHARACTER_CLASS;
return Open_colon;
}
":]" {
BEGIN INITIAL;
return Colon_close;
}
<CHARACTER_CLASS>"alnum" |
<CHARACTER_CLASS>"alpha" |
<CHARACTER_CLASS>"blank" |
<CHARACTER_CLASS>"cntrl" |
<CHARACTER_CLASS>"digit" |
<CHARACTER_CLASS>"graph" |
<CHARACTER_CLASS>"lower" |
<CHARACTER_CLASS>"print" |
<CHARACTER_CLASS>"punct" |
<CHARACTER_CLASS>"space" |
<CHARACTER_CLASS>"upper" |
<CHARACTER_CLASS>"xdigit" return class_name;
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