diff options
| author | David Lechner <david@lechnology.com> | 2020-03-24 23:54:45 -0500 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2022-03-31 16:59:30 +1100 |
| commit | 783b1a868fb0f3c1fd6cf7231311c24801c33505 (patch) | |
| tree | cb182083ad7661e8026ce5b280e972511389beaa /py/vm.c | |
| parent | 1e99d29f362f8cccc60a36fcbd8590404c719f40 (diff) | |
py/runtime: Allow multiple *args in a function call.
This is a partial implementation of PEP 448 to allow unpacking multiple
star args in a function or method call.
This is implemented by changing the emitted bytecodes so that both
positional args and star args are stored as positional args. A bitmap is
added to indicate if an argument at a given position is a positional
argument or a star arg.
In the generated code, this new bitmap takes the place of the old star arg.
It is stored as a small int, so this means only the first N arguments can
be star args where N is the number of bits in a small int.
The runtime is modified to interpret this new bytecode format while still
trying to perform as few memory reallocations as possible.
Signed-off-by: David Lechner <david@pybricks.com>
Diffstat (limited to 'py/vm.c')
| -rw-r--r-- | py/vm.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -949,7 +949,7 @@ unwind_jump:; // unum & 0xff == n_positional // (unum >> 8) & 0xff == n_keyword // We have following stack layout here: - // fun arg0 arg1 ... kw0 val0 kw1 val1 ... seq <- TOS + // fun arg0 arg1 ... kw0 val0 kw1 val1 ... bitmap <- TOS sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe) + 1; #if MICROPY_STACKLESS if (mp_obj_get_type(*sp) == &mp_type_fun_bc) { @@ -1034,7 +1034,7 @@ unwind_jump:; // unum & 0xff == n_positional // (unum >> 8) & 0xff == n_keyword // We have following stack layout here: - // fun self arg0 arg1 ... kw0 val0 kw1 val1 ... seq <- TOS + // fun self arg0 arg1 ... kw0 val0 kw1 val1 ... bitmap <- TOS sp -= (unum & 0xff) + ((unum >> 7) & 0x1fe) + 2; #if MICROPY_STACKLESS if (mp_obj_get_type(*sp) == &mp_type_fun_bc) { |