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-rw-r--r--trunk/src/examples/cpp_enum_parser.py52
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diff --git a/trunk/src/examples/cpp_enum_parser.py b/trunk/src/examples/cpp_enum_parser.py
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-#
-# cpp_enum_parser.py
-#
-# Posted by Mark Tolenen on comp.lang.python in August, 2009,
-# Used with permission.
-#
-# Parser that scans through C or C++ code for enum definitions, and
-# generates corresponding Python constant definitions.
-#
-#
-
-from pyparsing import *
-# sample string with enums and other stuff
-sample = '''
- stuff before
- enum hello {
- Zero,
- One,
- Two,
- Three,
- Five=5,
- Six,
- Ten=10
- };
- in the middle
- enum blah
- {
- alpha,
- beta,
- gamma = 10 ,
- zeta = 50
- };
- at the end
- '''
-
-# syntax we don't want to see in the final parse tree
-LBRACE,RBRACE,EQ,COMMA = map(Suppress,"{}=,")
-_enum = Suppress('enum')
-identifier = Word(alphas,alphanums+'_')
-integer = Word(nums)
-enumValue = Group(identifier('name') + Optional(EQ + integer('value')))
-enumList = Group(enumValue + ZeroOrMore(COMMA + enumValue))
-enum = _enum + identifier('enum') + LBRACE + enumList('names') + RBRACE
-
-# find instances of enums ignoring other syntax
-for item,start,stop in enum.scanString(sample):
- id = 0
- for entry in item.names:
- if entry.value != '':
- id = int(entry.value)
- print('%s_%s = %d' % (item.enum.upper(),entry.name.upper(),id))
- id += 1