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c5966128c7
Each built-in exception is now a type, with base type BaseException. C exceptions are created by passing a pointer to the exception type to make an instance of. When raising an exception from the VM, an instance is created automatically if an exception type is raised (as opposed to an exception instance). Exception matching (RT_BINARY_OP_EXCEPTION_MATCH) is now proper. Handling of parse error changed to match new exceptions. mp_const_type renamed to mp_type_type for consistency.
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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// this is a wrapper object that is turns something that has a __getitem__ method into an iterator
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typedef struct _mp_obj_getitem_iter_t {
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mp_obj_base_t base;
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mp_obj_t args[3];
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} mp_obj_getitem_iter_t;
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STATIC mp_obj_t it_iternext(mp_obj_t self_in) {
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mp_obj_getitem_iter_t *self = self_in;
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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// try to get next item
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mp_obj_t value = rt_call_method_n_kw(1, 0, self->args);
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self->args[2] = MP_OBJ_NEW_SMALL_INT(MP_OBJ_SMALL_INT_VALUE(self->args[2]) + 1);
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nlr_pop();
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return value;
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} else {
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// an exception was raised
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if (mp_obj_get_type(nlr.ret_val) == &mp_type_StopIteration) {
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// return mp_const_stop_iteration instead of raising StopIteration
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return mp_const_stop_iteration;
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} else {
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// re-raise exception
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nlr_jump(nlr.ret_val);
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}
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}
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}
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STATIC const mp_obj_type_t it_type = {
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{ &mp_type_type },
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.name = MP_QSTR_iterator,
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.iternext = it_iternext
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};
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// args are those returned from rt_load_method_maybe (ie either an attribute or a method)
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mp_obj_t mp_obj_new_getitem_iter(mp_obj_t *args) {
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mp_obj_getitem_iter_t *o = m_new_obj(mp_obj_getitem_iter_t);
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o->base.type = &it_type;
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o->args[0] = args[0];
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o->args[1] = args[1];
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o->args[2] = MP_OBJ_NEW_SMALL_INT(0);
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return o;
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}
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