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|
#
# R1
#
namespace r1
lex
literal '!', 'a', 'b'
ignore /[ \n\t]+/
end
def line [ '!' 'a' 'b' 'b' 'a']
end r1
#
# R2
#
namespace r2
lex
literal '!'
token id /[a-zA-Z_]+/
ignore /[ \n\t]+/
end
def line [ '!' id ]
end r2
def item
[r1::line]
| [r2::line]
def btscan
[item*]
parse P: btscan[ stdin ]
match P.tree ~!abb !abba !aab
print_xml(P.tree)
print( '\n' )
|
