Module pyparsing :: Class MatchFirst

Class MatchFirst

   object --+        
            |        
ParserElement --+    
                |    
  ParseExpression --+
                    |
                   MatchFirst

Requires that at least one :class:`ParseExpression` is found. If two expressions match, the first one listed is the one that will match. May be constructed using the ``'|'`` operator.

Example:

   # construct MatchFirst using '|' operator

   # watch the order of expressions to match
   number = Word(nums) | Combine(Word(nums) + '.' + Word(nums))
   print(number.searchString("123 3.1416 789")) #  Fail! -> [['123'], ['3'], ['1416'], ['789']]

   # put more selective expression first
   number = Combine(Word(nums) + '.' + Word(nums)) | Word(nums)
   print(number.searchString("123 3.1416 789")) #  Better -> [['123'], ['3.1416'], ['789']]

Nested Classes

[hide private]

Inherited from ParserElement (private): _FifoCache, _UnboundedCache, _literalStringClass

Instance Methods

[hide private]

__init__(self, exprs, savelist=False)
x.__init__(...) initializes x; see help(type(x)) for signature

source code

streamline(self)

source code

parseImpl(self, instring, loc, doActions=True)

source code

__ior__(self, other)

source code

__str__(self)
str(x)

source code

checkRecursion(self, parseElementList)

source code

_setResultsName(self, name, listAllMatches=False)

source code

Inherited from ParseExpression: append, copy, ignore, leaveWhitespace, validate

Inherited from ParserElement: __add__, __and__, __call__, __eq__, __getitem__, __hash__, __invert__, __iter__, __mul__, __ne__, __or__, __radd__, __rand__, __repr__, __req__, __rmul__, __rne__, __ror__, __rsub__, __rxor__, __sub__, __xor__, addCondition, addParseAction, canParseNext, matches, parseFile, parseString, parseWithTabs, postParse, preParse, runTests, scanString, searchString, setBreak, setDebug, setDebugActions, setFailAction, setName, setParseAction, setResultsName, setWhitespaceChars, split, suppress, transformString, tryParse

Inherited from ParserElement (private): _parse, _parseCache, _parseNoCache, _skipIgnorables

Inherited from object: __delattr__, __format__, __getattribute__, __new__, __reduce__, __reduce_ex__, __setattr__, __sizeof__, __subclasshook__