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Issue #27078: Added BUILD_STRING opcode. Optimized f-strings evaluation.

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This commit is contained in:
Serhiy Storchaka 2016-09-06 22:07:53 +03:00
parent 620bb277f8
commit ea525a2d1a
14 changed files with 396 additions and 356 deletions
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18
Python/ceval.c
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@ -2538,6 +2538,24 @@ _PyEval_EvalFrameDefault(PyFrameObject *f, int throwflag)
DISPATCH();
}
TARGET(BUILD_STRING) {
PyObject *str;
PyObject *empty = PyUnicode_New(0, 0);
if (empty == NULL) {
goto error;
}
str = _PyUnicode_JoinArray(empty, stack_pointer - oparg, oparg);
Py_DECREF(empty);
if (str == NULL)
goto error;
while (--oparg >= 0) {
PyObject *item = POP();
Py_DECREF(item);
}
PUSH(str);
DISPATCH();
}
TARGET(BUILD_TUPLE) {
PyObject *tup = PyTuple_New(oparg);
if (tup == NULL)