function.py

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"""
Created on Nov 22, 2014

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@author: Dula Nad
"""
from .variable import Variable

class Function:
    """
    Represents the C++ function in the object form.
    
    Class attributes:
    _XMLTAG -- constant string with the xml tag description
    """
    _XMLTAG = 'fun'

    def __init__(self, xmlnode = None):
        """
        Populates the variable from a XML node info.
        When the XML node is not defined, does nothing.
        
        xmlnode -- the XML node with the member definition
            
        Required attributes:
        name -- name of the function
        Optional attributes:
        ret -- the return type
        inline -- flag if the function is to be inlined
        qual -- the qualifer of the functon
        """
        self.name = 'unnamed'
        self.ret = 'void'
        self.inline = False
        self.qual = None
        self.static = False
        
        self.args = []
        self.body = ''
        
        if xmlnode != None: self.from_xml(xmlnode)
        
    def from_xml(self, xmlnode):
        """
        Extracts the variable attributes from the XML node.
        
        xmlnode -- the XML node with the member definition
        """
        
        if xmlnode.tag != self._XMLTAG:
            raise NameError(self.__class__.__name__ + 
                            ' expected XML tag: "' + 
                            self._XMLTAG + 
                            '"')
        
        self.name = xmlnode.get('name',self.name)
        self.ret = xmlnode.get('ret',self.ret)
        self.inline = xmlnode.get('inline',self.inline)
        self.qual = xmlnode.get('qual',self.qual)
        self.static = xmlnode.get('static',None) != None
        
        for node in xmlnode.findall('var'):
            self.args.append(Variable(node))  
        
        for body in xmlnode.findall('body'):
            self.body = self.body + body.text()