#     Copyright 2014, Kay Hayen, mailto:kay.hayen@gmail.com
#
#     Part of "Nuitka", an optimizing Python compiler that is compatible and
#     integrates with CPython, but also works on its own.
#
#     Licensed under the Apache License, Version 2.0 (the "License");
#     you may not use this file except in compliance with the License.
#     You may obtain a copy of the License at
#
#        http://www.apache.org/licenses/LICENSE-2.0
#
#     Unless required by applicable law or agreed to in writing, software
#     distributed under the License is distributed on an "AS IS" BASIS,
#     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#     See the License for the specific language governing permissions and
#     limitations under the License.
#
""" Code generation for lists.

Right now only the creation is done here. But more should be added later on.
"""

from .ErrorCodes import getErrorExitBoolCode, getReleaseCodes


def getListOperationAppendCode(to_name, list_name, value_name, emit, context):
    res_name = context.getIntResName()

    emit(
        "%s = PyList_Append( %s, %s );" % (
            res_name,
            list_name,
            value_name
        )
    )

    getReleaseCodes(
        release_names = (list_name, value_name),
        emit          = emit,
        context       = context
    )

    getErrorExitBoolCode(
        condition = "%s == -1" % res_name,
        emit      = emit,
        context   = context
    )

    # Only assign if necessary.
    if context.isUsed(to_name):
        emit(
            "%s = Py_None;" % to_name
        )
    else:
        context.forgetTempName(to_name)
