def satisfies(guard):
    """Returns the current token if it satisfies the guard function provided.
    
    Fails otherwise.
    This is the a generalisation of one_of.
    """
    i = peek()
    if (i is EndOfFile) or (not guard(i)):
        fail(["<satisfies predicate " + _fun_to_str(guard) + ">"])
    next()
    return i
def satisfies(guard):
    """Returns the current token if it satisfies the guard function provided.
    
    Fails otherwise.
    This is the a generalisation of one_of.
    """
    i = peek()
    if (i is EndOfFile) or (not guard(i)):
        fail(["<satisfies predicate " + _fun_to_str(guard) + ">"])
    next()
    return i
def satisfies ( guard ) : i = peek ( ) if ( i is EndOfFile ) or ( not guard ( i ) ) : fail ( [ "<satisfies predicate " + _fun_to_str ( guard ) + ">" ] ) next ( ) return i
Returns the current token if it satisfies the guard function provided.
    
    Fails otherwise.
    This is the a generalisation of one_of.
Returns the current token if it satisfies the guard function provided . Fails otherwise . This is the a generalisation of one_of .