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Dir : ~/opt/gsutil/third_party/pyparsing/examples/

View File Name : matchPreviousDemo.py

#
# matchPreviousDemo.py
#

from pyparsing import *

src = """
class a
...
end a;

class b
...
end b;

class c
...
end d;"""


identifier = Word(alphas)

classIdent = identifier("classname")  # note that this also makes a copy of identifier
classHead = "class" + classIdent
classBody = "..."
classEnd = "end" + matchPreviousLiteral(classIdent) + ";"
classDefn = classHead + classBody + classEnd

# use this form to catch syntax error
# classDefn = classHead + classBody - classEnd

for tokens in classDefn.searchString(src):
    print(tokens.classname)