def _build_const_declartions(self, with_init=True):
        """
        Generate constants declarations

        :return: list of declarations
        """
        decls = []

        # Use type as provided by user in loop indices
        index_type = self.get_index_type()

        i = 2  # subscript for cli input, 1 is reserved for repeat
        for k in self.constants:
            # const long long N = strtoul(argv[2])
            # with increasing N and 1
            # TODO change subscript of argv depending on constant count
            type_decl = c_ast.TypeDecl(k.name, ['const'], c_ast.IdentifierType(index_type))
            init = None
            if with_init:
                init = c_ast.FuncCall(
                    c_ast.ID('atoi'),
                    c_ast.ExprList([c_ast.ArrayRef(c_ast.ID('argv'),
                                                   c_ast.Constant('int', str(i)))]))
            i += 1
            decls.append(c_ast.Decl(
                k.name, ['const'], [], [],
                type_decl, init, None))

        return decls
Generate constants declarations

        :return: list of declarations