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v3.14.8

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enumobject.c.h

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/*[clinic input]

preserve

[clinic start generated code]*/

#if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)

# include "pycore_gc.h" // PyGC_Head

# include "pycore_runtime.h" // _Py_ID()

#endif

#include "pycore_modsupport.h" // _PyArg_UnpackKeywords()

PyDoc_STRVAR(enum_new__doc__,

"enumerate(iterable, start=0)\n"

"--\n"

"\n"

"Return an enumerate object.\n"

"\n"

" iterable\n"

" an object supporting iteration\n"

"\n"

"The enumerate object yields pairs containing a count (from start, which\n"

"defaults to zero) and a value yielded by the iterable argument.\n"

"\n"

"enumerate is useful for obtaining an indexed list:\n"

" (0, seq[0]), (1, seq[1]), (2, seq[2]), ...");

static PyObject *

enum_new_impl(PyTypeObject *type, PyObject *iterable, PyObject *start);

static PyObject *

enum_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)

{

PyObject *return_value = NULL;

#if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)

#define NUM_KEYWORDS 2

static struct {

PyGC_Head _this_is_not_used;

PyObject_VAR_HEAD

Py_hash_t ob_hash;

PyObject *ob_item[NUM_KEYWORDS];

} _kwtuple = {

.ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)

.ob_hash = -1,

.ob_item = { &_Py_ID(iterable), &_Py_ID(start), },

};

#undef NUM_KEYWORDS

#define KWTUPLE (&_kwtuple.ob_base.ob_base)

#else // !Py_BUILD_CORE

# define KWTUPLE NULL

#endif // !Py_BUILD_CORE

static const char * const _keywords[] = {"iterable", "start", NULL};

static _PyArg_Parser _parser = {

.keywords = _keywords,

.fname = "enumerate",

.kwtuple = KWTUPLE,

};

#undef KWTUPLE

PyObject *argsbuf[2];

PyObject * const *fastargs;

Py_ssize_t nargs = PyTuple_GET_SIZE(args);

Py_ssize_t noptargs = nargs + (kwargs ? PyDict_GET_SIZE(kwargs) : 0) - 1;

PyObject *iterable;

PyObject *start = 0;

fastargs = _PyArg_UnpackKeywords(_PyTuple_CAST(args)->ob_item, nargs, kwargs, NULL, &_parser,

/*minpos*/ 1, /*maxpos*/ 2, /*minkw*/ 0, /*varpos*/ 0, argsbuf);

if (!fastargs) {

goto exit;

}

iterable = fastargs[0];

if (!noptargs) {

goto skip_optional_pos;

}

start = fastargs[1];

skip_optional_pos:

return_value = enum_new_impl(type, iterable, start);

exit:

return return_value;

}

PyDoc_STRVAR(reversed_new__doc__,

"reversed(sequence, /)\n"

"--\n"

"\n"

"Return a reverse iterator over the values of the given sequence.");

static PyObject *

reversed_new_impl(PyTypeObject *type, PyObject *seq);

static PyObject *

reversed_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)

{

PyObject *return_value = NULL;

PyTypeObject *base_tp = &PyReversed_Type;

PyObject *seq;

if ((type == base_tp || type->tp_init == base_tp->tp_init) &&

!_PyArg_NoKeywords("reversed", kwargs)) {

goto exit;

}

if (!_PyArg_CheckPositional("reversed", PyTuple_GET_SIZE(args), 1, 1)) {

goto exit;

}

seq = PyTuple_GET_ITEM(args, 0);

return_value = reversed_new_impl(type, seq);

exit:

return return_value;

}

/*[clinic end generated code: output=3300305b351674d3 input=a9049054013a1b77]*/