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#include <mruby.h>
#include <mruby/class.h>
#include <mruby/variable.h>
#include <mruby/error.h>
#include <mruby/proc.h>
#include <mruby/opcode.h>
#include <mruby/presym.h>
MRB_PRESYM_DEFINE_VAR_AND_INITER(catch_syms_3, 1, MRB_SYM(call))
static const mrb_code catch_iseq_3[18] = {
OP_ENTER, 0x00, 0x00, 0x00,
OP_GETUPVAR, 0x02, 0x02, 0x01,
OP_GETUPVAR, 0x03, 0x01, 0x01,
OP_SEND, 0x02, 0x00, 0x01,
OP_RETURN, 0x02,};
static const mrb_irep catch_irep_3 = {
2,5,0,
MRB_IREP_STATIC,catch_iseq_3,
NULL,catch_syms_3,NULL,
NULL,
NULL,
18,0,1,0,0
};
static const mrb_irep *catch_reps_2[1] = {
&catch_irep_3,
};
static const mrb_code catch_iseq_2[13] = {
OP_ENTER, 0x00, 0x00, 0x00,
OP_LAMBDA, 0x02, 0x00,
OP_SEND, 0x02, 0x00, 0x00,
OP_RETURN, 0x02,};
static const mrb_irep catch_irep_2 = {
2,4,0,
MRB_IREP_STATIC,catch_iseq_2,
NULL,catch_syms_3,catch_reps_2,
NULL,
NULL,
13,0,1,1,0
};
static const mrb_irep *catch_reps_1[1] = {
&catch_irep_2,
};
MRB_PRESYM_DEFINE_VAR_AND_INITER(catch_syms_1, 3, MRB_SYM(Object), MRB_SYM(new), MRB_SYM(call))
static const mrb_code catch_iseq_1[29] = {
OP_ENTER, 0x00, 0x20, 0x01,
OP_JMP, 0x00, 0x03,
OP_JMP, 0x00, 0x0a,
OP_GETCONST, 0x03, 0x00,
OP_SEND, 0x03, 0x01, 0x00,
OP_MOVE, 0x01, 0x03,
OP_LAMBDA, 0x03, 0x00,
OP_SEND, 0x03, 0x02, 0x00,
OP_RETURN, 0x03,};
static const mrb_irep catch_irep = {
3,5,0,
MRB_IREP_STATIC,catch_iseq_1,
NULL,catch_syms_1,catch_reps_1,
NULL,
NULL,
29,0,3,1,0
};
static const struct RProc catch_proc = {
NULL, NULL, MRB_TT_PROC, MRB_GC_RED, MRB_FL_OBJ_IS_FROZEN | MRB_PROC_SCOPE | MRB_PROC_STRICT,
{ &catch_irep }, NULL, { NULL }
};
static const mrb_callinfo *
find_catcher(mrb_state *mrb, mrb_value tag)
{
const mrb_callinfo *ci = mrb->c->ci;
size_t n = ci - mrb->c->cibase;
ci--;
for (; n > 0; n--, ci--) {
const mrb_value *arg1 = ci->stack + 1;
if (ci->proc == &catch_proc && mrb_obj_eq(mrb, *arg1, tag)) {
return ci;
}
}
return NULL;
}
static mrb_value
mrb_f_throw(mrb_state *mrb, mrb_value self)
{
mrb_value tag, obj;
if (mrb_get_args(mrb, "o|o", &tag, &obj) == 1) {
obj = mrb_nil_value();
}
const mrb_callinfo *ci = find_catcher(mrb, tag);
if (ci) {
struct RBreak *b = MRB_OBJ_ALLOC(mrb, MRB_TT_BREAK, NULL);
mrb_break_value_set(b, obj);
mrb_break_proc_set(b, ci[2].proc); /* Back to the closure in `catch` method */
mrb_exc_raise(mrb, mrb_obj_value(b));
}
else {
mrb_value argv[2] = {tag, obj};
mrb_exc_raise(mrb, mrb_obj_new(mrb, mrb_exc_get_id(mrb, MRB_ERROR_SYM(UncaughtThrowError)), 2, argv));
}
/* not reached */
return mrb_nil_value();
}
void
mrb_mruby_catch_gem_init(mrb_state *mrb)
{
mrb_method_t m;
MRB_PRESYM_INIT_SYMBOLS(mrb, catch_syms_3);
MRB_PRESYM_INIT_SYMBOLS(mrb, catch_syms_1);
MRB_METHOD_FROM_PROC(m, &catch_proc);
mrb_define_method_raw(mrb, mrb->kernel_module, MRB_SYM(catch), m);
mrb_define_method(mrb, mrb->kernel_module, "throw", mrb_f_throw, MRB_ARGS_ARG(1,1));
}
void
mrb_mruby_catch_gem_final(mrb_state *mrb)
{
}
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