Package pygccxml :: Package declarations :: Module enumeration |

# Source Code for Module pygccxml.declarations.enumeration

      1  # Copyright 2004-2008 Roman Yakovenko.
      2  # Distributed under the Boost Software License, Version 1.0. (See
      3  # accompanying file LICENSE_1_0.txt or copy at
      4  # http://www.boost.org/LICENSE_1_0.txt)
      5
      6  """
      7  defines class, that describes C++ enum
      8  """
      9
     10  import copy
     11  import types
     12  import compilers
     13  import declaration
     14
     15 -class enumeration_t( declaration.declaration_t ):
     16      """
     17      describes C++ enum
     18      """
     19 -    def __init__( self, name='', values=None ):
     20          """creates class that describes C++ enum declaration
     21
     22          The items of the list 'values' may either be strings containing
     23          the enumeration value name or tuples (name, numvalue).
     24
     25          @param name: Enum name
     26          @type name: str
     27          @param parent: Parent declaration
     28          @type parent: declaration_t
     29          @param values: Enumeration values
     30          @type values: list
     31          """
     32          declaration.declaration_t.__init__( self, name )
     33
     34          # A list of tuples (valname(str), valnum(int)). The order of the list should
     35          # be the same as the order in the C/C++ source file.
     36          self._values = []
     37
     38          # Initialize values via property access
     39          self.values = values
     40          self._byte_size = 0
     41          self._byte_align = 0
     42
     43 -    def __eq__(self, other):
     44          if not declaration.declaration_t.__eq__( self, other ):
     45              return False
     46          return self.values == other.values
     47
     48 -    def _get__cmp__items( self ):
     49          """implementation details"""
     50          return [self.values]
     51
     52 -    def _get_values(self):
     53          return copy.copy(self._values)
     54 -    def _set_values(self, values):
     55          self._values = []
     56          # None is treated like an empty list
     57          if (values==None):
     58              return
     59          # Check that we have indeed a list...
     60          if type(values)!=list:
     61              raise ValueError, "'values' must be a list (got a %s instead)"%type(values).__name__
     62          # Append the items individually. This has the effect that there's
     63          # some additional type checking and that a copy of 'values' is stored
     64          # and the caller cannot further manipulate the list via his own reference
     65          for item in values:
     66              if isinstance(item, types.StringTypes):
     67                  self.append_value(item)
     68              elif type(item)==tuple:
     69                  name,num = item
     70                  self.append_value(name, num)
     71              else:
     72                  raise ValueError, "'values' contains an invalid item: %s"%item
     73      values = property( _get_values, _set_values
     74                         , doc="""A list of tuples (valname(str), valnum(int)) that contain the enumeration values.
     75                         @type: list""")
     76
     77 -    def append_value(self, valuename, valuenum=None):
     78          """Append another enumeration value to the enum.
     79
     80          The numeric value may be None in which case it is automatically determined by
     81          increasing the value of the last item.
     82
     83          When the 'values' attribute is accessed the resulting list will be in the same
     84          order as append_value() was called.
     85
     86          @param valuename: The name of the value.
     87          @type valuename: str
     88          @param valuenum: The numeric value or None.
     89          @type valuenum: int
     90          """
     91          # No number given? Then use the previous one + 1
     92          if valuenum==None:
     93              if len(self._values)==0:
     94                  valuenum = 0
     95              else:
     96                  valuenum = self._values[-1][1]+1
     97
     98          # Store the new value
     99          self._values.append((valuename, int(valuenum)))
    100
    101 -    def has_value_name(self, name):
    102          """Check if this enum has a particular name among its values.
    103
    104          @param name: Enumeration value name
    105          @type name: str
    106          @return: True if there is an enumeration value with the given name
    107          """
    108          for val,num in self._values:
    109              if val==name:
    110                  return True
    111          return False
    112
    113 -    def get_name2value_dict( self ):
    114          """returns a dictionary, that maps between enum name( key ) and enum value( value )"""
    115          x = {}
    116          for val, num in self._values:
    117              x[val] = num
    118          return x
    119
    120 -    def i_depend_on_them( self, recursive=True ):
    121          return []
    122
    123 -    def _get_byte_size(self):
    124          return self._byte_size
    125 -    def _set_byte_size( self, new_byte_size ):
    126          self._byte_size = new_byte_size
    127      byte_size = property( _get_byte_size, _set_byte_size
    128                            , doc="Size of this class in bytes @type: int")
    129
    130 -    def _get_byte_align(self):
    131          if self.compiler == compilers.MSVC_PDB_9:
    132              compilers.on_missing_functionality( self.compiler, "byte align" )
    133          return self._byte_align
    134 -    def _set_byte_align( self, new_byte_align ):
    135          self._byte_align = new_byte_align
    136      byte_align = property( _get_byte_align, _set_byte_align
    137                            , doc="Alignment of this class in bytes @type: int")
    138