cimport cython

cdef bytes b12345 = b'12345'

def index_literal(int i):

    """

    Python 3 returns integer values on indexing, Py2 returns byte

    string literals...

    >>> index_literal(0) in (ord('1'), '1')

    True

    >>> index_literal(-5) in (ord('1'), '1')

    True

    >>> index_literal(2) in (ord('3'), '3')

    True

    >>> index_literal(4) in (ord('5'), '5')

    True

    """

    return b"12345"[i]

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_literal_char_cast(int i):

    """

    >>> index_literal_char_cast(0) == ord('1')

    True

    >>> index_literal_char_cast(-5) == ord('1')

    True

    >>> index_literal_char_cast(2) == ord('3')

    True

    >>> index_literal_char_cast(4) == ord('5')

    True

    >>> index_literal_char_cast(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    return <char>(b"12345"[i])

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_nonliteral_char_cast(int i):

    """

    >>> index_nonliteral_char_cast(0) == ord('1')

    True

    >>> index_nonliteral_char_cast(-5) == ord('1')

    True

    >>> index_nonliteral_char_cast(2) == ord('3')

    True

    >>> index_nonliteral_char_cast(4) == ord('5')

    True

    >>> index_nonliteral_char_cast(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    return <char>(b12345[i])

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_literal_uchar_cast(int i):

    """

    >>> index_literal_uchar_cast(0) == ord('1')

    True

    >>> index_literal_uchar_cast(-5) == ord('1')

    True

    >>> index_literal_uchar_cast(2) == ord('3')

    True

    >>> index_literal_uchar_cast(4) == ord('5')

    True

    >>> index_literal_uchar_cast(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    return <unsigned char>(b"12345"[i])

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_nonliteral_uchar_cast(int i):

    """

    >>> index_nonliteral_uchar_cast(0) == ord('1')

    True

    >>> index_nonliteral_uchar_cast(-5) == ord('1')

    True

    >>> index_nonliteral_uchar_cast(2) == ord('3')

    True

    >>> index_nonliteral_uchar_cast(4) == ord('5')

    True

    >>> index_nonliteral_uchar_cast(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    return <unsigned char>(b12345[i])

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_literal_char_coerce(int i):

    """

    >>> index_literal_char_coerce(0) == ord('1')

    True

    >>> index_literal_char_coerce(-5) == ord('1')

    True

    >>> index_literal_char_coerce(2) == ord('3')

    True

    >>> index_literal_char_coerce(4) == ord('5')

    True

    >>> index_literal_char_coerce(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    cdef char result = b"12345"[i]

    return result

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

def index_nonliteral_char_coerce(int i):

    """

    >>> index_nonliteral_char_coerce(0) == ord('1')

    True

    >>> index_nonliteral_char_coerce(-5) == ord('1')

    True

    >>> index_nonliteral_char_coerce(2) == ord('3')

    True

    >>> index_nonliteral_char_coerce(4) == ord('5')

    True

    >>> index_nonliteral_char_coerce(6)

    Traceback (most recent call last):

    IndexError: string index out of range

    """

    cdef char result = b12345[i]

    return result

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

@cython.boundscheck(False)

def index_literal_char_coerce_no_check(int i):

    """

    >>> index_literal_char_coerce_no_check(0) == ord('1')

    True

    >>> index_literal_char_coerce_no_check(-5) == ord('1')

    True

    >>> index_literal_char_coerce_no_check(2) == ord('3')

    True

    >>> index_literal_char_coerce_no_check(4) == ord('5')

    True

    """

    cdef char result = b"12345"[i]

    return result

@cython.test_assert_path_exists("//PythonCapiCallNode")

@cython.test_fail_if_path_exists("//IndexNode",

                                 "//CoerceFromPyTypeNode")

@cython.boundscheck(False)

def index_nonliteral_char_coerce_no_check(int i):

    """

    >>> index_nonliteral_char_coerce_no_check(0) == ord('1')

    True

    >>> index_nonliteral_char_coerce_no_check(-5) == ord('1')

    True

    >>> index_nonliteral_char_coerce_no_check(2) == ord('3')

    True

    >>> index_nonliteral_char_coerce_no_check(4) == ord('5')

    True

    """

    cdef char result = b12345[i]

    return result