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cb52dda146
* include/ruby/ruby.h (rb_yield_values): check if argc matches the number of variadic arguments, and replace with rb_yield_values2. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58350 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2230 lines
59 KiB
C
2230 lines
59 KiB
C
/**********************************************************************
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vm_eval.c -
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$Author$
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created at: Sat May 24 16:02:32 JST 2008
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Copyright (C) 1993-2007 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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struct local_var_list {
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VALUE tbl;
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};
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static inline VALUE method_missing(VALUE obj, ID id, int argc, const VALUE *argv, enum method_missing_reason call_status);
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static inline VALUE vm_yield_with_cref(rb_thread_t *th, int argc, const VALUE *argv, const rb_cref_t *cref, int is_lambda);
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static inline VALUE vm_yield(rb_thread_t *th, int argc, const VALUE *argv);
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static inline VALUE vm_yield_with_block(rb_thread_t *th, int argc, const VALUE *argv, VALUE block_handler);
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static inline VALUE vm_yield_lambda_splattable(rb_thread_t *th, VALUE args);
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static VALUE vm_exec(rb_thread_t *th);
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static void vm_set_eval_stack(rb_thread_t * th, const rb_iseq_t *iseq, const rb_cref_t *cref, const struct rb_block *base_block);
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static int vm_collect_local_variables_in_heap(rb_thread_t *th, const VALUE *dfp, const struct local_var_list *vars);
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static VALUE rb_eUncaughtThrow;
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static ID id_result, id_tag, id_value;
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#define id_mesg idMesg
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/* vm_backtrace.c */
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VALUE rb_vm_backtrace_str_ary(rb_thread_t *th, int lev, int n);
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typedef enum call_type {
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CALL_PUBLIC,
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CALL_FCALL,
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CALL_VCALL,
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CALL_TYPE_MAX
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} call_type;
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static VALUE send_internal(int argc, const VALUE *argv, VALUE recv, call_type scope);
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static VALUE vm_call0_body(rb_thread_t* th, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv);
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static VALUE
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vm_call0(rb_thread_t* th, VALUE recv, ID id, int argc, const VALUE *argv, const rb_callable_method_entry_t *me)
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{
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struct rb_calling_info calling_entry, *calling;
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struct rb_call_info ci_entry;
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struct rb_call_cache cc_entry;
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calling = &calling_entry;
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ci_entry.flag = 0;
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ci_entry.mid = id;
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cc_entry.me = me;
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calling->recv = recv;
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calling->argc = argc;
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return vm_call0_body(th, calling, &ci_entry, &cc_entry, argv);
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}
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#if OPT_CALL_CFUNC_WITHOUT_FRAME
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static VALUE
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vm_call0_cfunc(rb_thread_t* th, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
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{
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VALUE val;
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RUBY_DTRACE_CMETHOD_ENTRY_HOOK(th, cc->me->owner, ci->mid);
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EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, calling->recv, ci->mid, ci->mid, cc->me->owner, Qnil);
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{
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rb_control_frame_t *reg_cfp = th->cfp;
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const rb_callable_method_entry_t *me = cc->me;
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const rb_method_cfunc_t *cfunc = &me->def->body.cfunc;
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int len = cfunc->argc;
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VALUE recv = calling->recv;
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int argc = calling->argc;
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if (len >= 0) rb_check_arity(argc, len, len);
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th->passed_ci = ci;
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cc->aux.inc_sp = 0;
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VM_PROFILE_UP(C2C_CALL);
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val = (*cfunc->invoker)(cfunc->func, recv, argc, argv);
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if (reg_cfp == th->cfp) {
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if (UNLIKELY(th->passed_ci != ci)) {
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rb_bug("vm_call0_cfunc: passed_ci error (ci: %p, passed_ci: %p)", ci, th->passed_ci);
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}
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th->passed_ci = 0;
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}
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else {
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CHECK_CFP_CONSISTENCY("vm_call0_cfunc");
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VM_PROFILE_UP(C2C_POPF);
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rb_vm_pop_frame(th);
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}
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}
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EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, calling->recv, ci->mid, ci->mid, callnig->cc->me->owner, val);
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RUBY_DTRACE_CMETHOD_RETURN_HOOK(th, cc->me->owner, ci->mid);
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return val;
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}
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#else
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static VALUE
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vm_call0_cfunc_with_frame(rb_thread_t* th, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
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{
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VALUE val;
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const rb_callable_method_entry_t *me = cc->me;
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const rb_method_cfunc_t *cfunc = &me->def->body.cfunc;
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int len = cfunc->argc;
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VALUE recv = calling->recv;
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int argc = calling->argc;
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ID mid = ci->mid;
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VALUE block_handler = calling->block_handler;
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RUBY_DTRACE_CMETHOD_ENTRY_HOOK(th, me->owner, me->def->original_id);
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EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, recv, me->def->original_id, mid, me->owner, Qnil);
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{
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rb_control_frame_t *reg_cfp = th->cfp;
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vm_push_frame(th, 0, VM_FRAME_MAGIC_CFUNC | VM_FRAME_FLAG_CFRAME | VM_ENV_FLAG_LOCAL, recv,
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block_handler, (VALUE)me,
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0, reg_cfp->sp, 0, 0);
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if (len >= 0) rb_check_arity(argc, len, len);
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VM_PROFILE_UP(C2C_CALL);
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val = (*cfunc->invoker)(cfunc->func, recv, argc, argv);
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CHECK_CFP_CONSISTENCY("vm_call0_cfunc_with_frame");
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VM_PROFILE_UP(C2C_POPF);
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rb_vm_pop_frame(th);
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}
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EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, recv, me->def->original_id, mid, me->owner, val);
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RUBY_DTRACE_CMETHOD_RETURN_HOOK(th, me->owner, me->def->original_id);
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return val;
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}
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static VALUE
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vm_call0_cfunc(rb_thread_t* th, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
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{
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return vm_call0_cfunc_with_frame(th, calling, ci, cc, argv);
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}
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#endif
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/* `ci' should point temporal value (on stack value) */
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static VALUE
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vm_call0_body(rb_thread_t* th, struct rb_calling_info *calling, const struct rb_call_info *ci, struct rb_call_cache *cc, const VALUE *argv)
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{
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VALUE ret;
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calling->block_handler = vm_passed_block_handler(th);
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again:
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switch (cc->me->def->type) {
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case VM_METHOD_TYPE_ISEQ:
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{
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rb_control_frame_t *reg_cfp = th->cfp;
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int i;
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CHECK_VM_STACK_OVERFLOW(reg_cfp, calling->argc + 1);
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*reg_cfp->sp++ = calling->recv;
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for (i = 0; i < calling->argc; i++) {
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*reg_cfp->sp++ = argv[i];
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}
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vm_call_iseq_setup(th, reg_cfp, calling, ci, cc);
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VM_ENV_FLAGS_SET(th->cfp->ep, VM_FRAME_FLAG_FINISH);
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return vm_exec(th); /* CHECK_INTS in this function */
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}
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case VM_METHOD_TYPE_NOTIMPLEMENTED:
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case VM_METHOD_TYPE_CFUNC:
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ret = vm_call0_cfunc(th, calling, ci, cc, argv);
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goto success;
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case VM_METHOD_TYPE_ATTRSET:
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rb_check_arity(calling->argc, 1, 1);
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ret = rb_ivar_set(calling->recv, cc->me->def->body.attr.id, argv[0]);
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goto success;
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case VM_METHOD_TYPE_IVAR:
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rb_check_arity(calling->argc, 0, 0);
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ret = rb_attr_get(calling->recv, cc->me->def->body.attr.id);
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goto success;
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case VM_METHOD_TYPE_BMETHOD:
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ret = vm_call_bmethod_body(th, calling, ci, cc, argv);
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goto success;
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case VM_METHOD_TYPE_ZSUPER:
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case VM_METHOD_TYPE_REFINED:
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{
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const rb_method_type_t type = cc->me->def->type;
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VALUE super_class = cc->me->defined_class;
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if (type == VM_METHOD_TYPE_ZSUPER) {
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super_class = RCLASS_ORIGIN(super_class);
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}
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else if (cc->me->def->body.refined.orig_me) {
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cc->me = refined_method_callable_without_refinement(cc->me);
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goto again;
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}
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super_class = RCLASS_SUPER(super_class);
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if (!super_class || !(cc->me = rb_callable_method_entry(super_class, ci->mid))) {
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enum method_missing_reason ex = (type == VM_METHOD_TYPE_ZSUPER) ? MISSING_SUPER : 0;
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ret = method_missing(calling->recv, ci->mid, calling->argc, argv, ex);
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goto success;
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}
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RUBY_VM_CHECK_INTS(th);
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goto again;
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}
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case VM_METHOD_TYPE_ALIAS:
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cc->me = aliased_callable_method_entry(cc->me);
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goto again;
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case VM_METHOD_TYPE_MISSING:
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{
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vm_passed_block_handler_set(th, calling->block_handler);
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return method_missing(calling->recv, ci->mid, calling->argc,
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argv, MISSING_NOENTRY);
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}
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case VM_METHOD_TYPE_OPTIMIZED:
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switch (cc->me->def->body.optimize_type) {
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case OPTIMIZED_METHOD_TYPE_SEND:
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ret = send_internal(calling->argc, argv, calling->recv, CALL_FCALL);
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goto success;
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case OPTIMIZED_METHOD_TYPE_CALL:
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{
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rb_proc_t *proc;
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GetProcPtr(calling->recv, proc);
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ret = rb_vm_invoke_proc(th, proc, calling->argc, argv, calling->block_handler);
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goto success;
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}
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default:
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rb_bug("vm_call0: unsupported optimized method type (%d)", cc->me->def->body.optimize_type);
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}
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break;
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case VM_METHOD_TYPE_UNDEF:
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break;
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}
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rb_bug("vm_call0: unsupported method type (%d)", cc->me->def->type);
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return Qundef;
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success:
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RUBY_VM_CHECK_INTS(th);
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return ret;
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}
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VALUE
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rb_vm_call(rb_thread_t *th, VALUE recv, VALUE id, int argc, const VALUE *argv, const rb_callable_method_entry_t *me)
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{
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return vm_call0(th, recv, id, argc, argv, me);
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}
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static inline VALUE
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vm_call_super(rb_thread_t *th, int argc, const VALUE *argv)
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{
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VALUE recv = th->cfp->self;
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VALUE klass;
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ID id;
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rb_control_frame_t *cfp = th->cfp;
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const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
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if (VM_FRAME_RUBYFRAME_P(cfp)) {
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rb_bug("vm_call_super: should not be reached");
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}
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klass = RCLASS_ORIGIN(me->defined_class);
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klass = RCLASS_SUPER(klass);
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id = me->def->original_id;
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me = rb_callable_method_entry(klass, id);
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if (!me) {
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return method_missing(recv, id, argc, argv, MISSING_SUPER);
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}
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else {
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return vm_call0(th, recv, id, argc, argv, me);
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}
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}
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VALUE
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rb_call_super(int argc, const VALUE *argv)
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{
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rb_thread_t *th = GET_THREAD();
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PASS_PASSED_BLOCK_HANDLER_TH(th);
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return vm_call_super(th, argc, argv);
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}
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VALUE
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rb_current_receiver(void)
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{
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rb_thread_t *th = GET_THREAD();
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rb_control_frame_t *cfp;
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if (!th || !(cfp = th->cfp))
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rb_raise(rb_eRuntimeError, "no self, no life");
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return cfp->self;
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}
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static inline void
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stack_check(rb_thread_t *th)
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{
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if (!rb_thread_raised_p(th, RAISED_STACKOVERFLOW) && ruby_stack_check()) {
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rb_thread_raised_set(th, RAISED_STACKOVERFLOW);
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rb_exc_raise(sysstack_error);
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}
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}
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static inline const rb_callable_method_entry_t *rb_search_method_entry(VALUE recv, ID mid);
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static inline enum method_missing_reason rb_method_call_status(rb_thread_t *th, const rb_callable_method_entry_t *me, call_type scope, VALUE self);
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/*!
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* \internal
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* calls the specified method.
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*
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* This function is called by functions in rb_call* family.
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* \param recv receiver of the method
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* \param mid an ID that represents the name of the method
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* \param argc the number of method arguments
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* \param argv a pointer to an array of method arguments
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* \param scope
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* \param self self in the caller. Qundef means no self is considered and
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* protected methods cannot be called
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*
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* \note \a self is used in order to controlling access to protected methods.
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*/
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static inline VALUE
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rb_call0(VALUE recv, ID mid, int argc, const VALUE *argv,
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call_type scope, VALUE self)
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{
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const rb_callable_method_entry_t *me = rb_search_method_entry(recv, mid);
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rb_thread_t *th = GET_THREAD();
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enum method_missing_reason call_status = rb_method_call_status(th, me, scope, self);
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if (call_status != MISSING_NONE) {
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return method_missing(recv, mid, argc, argv, call_status);
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}
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stack_check(th);
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return vm_call0(th, recv, mid, argc, argv, me);
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}
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struct rescue_funcall_args {
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rb_thread_t *th;
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VALUE defined_class;
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VALUE recv;
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ID mid;
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const rb_method_entry_t *me;
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unsigned int respond: 1;
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unsigned int respond_to_missing: 1;
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int argc;
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const VALUE *argv;
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};
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static VALUE
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check_funcall_exec(struct rescue_funcall_args *args)
|
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{
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return call_method_entry(args->th, args->defined_class,
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args->recv, idMethodMissing,
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args->me, args->argc, args->argv);
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}
|
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#define PRIV Qfalse /* TODO: for rubyspec now, should be Qtrue */
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|
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static VALUE
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check_funcall_failed(struct rescue_funcall_args *args, VALUE e)
|
|
{
|
|
int ret = args->respond;
|
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if (!ret) {
|
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switch (rb_method_boundp(args->defined_class, args->mid,
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BOUND_PRIVATE|BOUND_RESPONDS)) {
|
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case 2:
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ret = TRUE;
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break;
|
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case 0:
|
|
ret = args->respond_to_missing;
|
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break;
|
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default:
|
|
ret = FALSE;
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break;
|
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}
|
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}
|
|
if (ret) {
|
|
rb_exc_raise(e);
|
|
}
|
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return Qundef;
|
|
}
|
|
|
|
static int
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check_funcall_respond_to(rb_thread_t *th, VALUE klass, VALUE recv, ID mid)
|
|
{
|
|
return vm_respond_to(th, klass, recv, mid, TRUE);
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}
|
|
|
|
static int
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|
check_funcall_callable(rb_thread_t *th, const rb_callable_method_entry_t *me)
|
|
{
|
|
return rb_method_call_status(th, me, CALL_FCALL, th->cfp->self) == MISSING_NONE;
|
|
}
|
|
|
|
static VALUE
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|
check_funcall_missing(rb_thread_t *th, VALUE klass, VALUE recv, ID mid, int argc, const VALUE *argv, int respond, VALUE def)
|
|
{
|
|
struct rescue_funcall_args args;
|
|
const rb_method_entry_t *me;
|
|
VALUE ret = Qundef;
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|
|
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ret = basic_obj_respond_to_missing(th, klass, recv,
|
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ID2SYM(mid), PRIV);
|
|
if (!RTEST(ret)) return def;
|
|
args.respond = respond > 0;
|
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args.respond_to_missing = (ret != Qundef);
|
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ret = def;
|
|
me = method_entry_get(klass, idMethodMissing, &args.defined_class);
|
|
if (me && !METHOD_ENTRY_BASIC(me)) {
|
|
VALUE argbuf, *new_args = ALLOCV_N(VALUE, argbuf, argc+1);
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|
|
|
new_args[0] = ID2SYM(mid);
|
|
MEMCPY(new_args+1, argv, VALUE, argc);
|
|
th->method_missing_reason = MISSING_NOENTRY;
|
|
args.th = th;
|
|
args.recv = recv;
|
|
args.me = me;
|
|
args.mid = mid;
|
|
args.argc = argc + 1;
|
|
args.argv = new_args;
|
|
ret = rb_rescue2(check_funcall_exec, (VALUE)&args,
|
|
check_funcall_failed, (VALUE)&args,
|
|
rb_eNoMethodError, (VALUE)0);
|
|
ALLOCV_END(argbuf);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
VALUE
|
|
rb_check_funcall(VALUE recv, ID mid, int argc, const VALUE *argv)
|
|
{
|
|
return rb_check_funcall_default(recv, mid, argc, argv, Qundef);
|
|
}
|
|
|
|
VALUE
|
|
rb_check_funcall_default(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE def)
|
|
{
|
|
VALUE klass = CLASS_OF(recv);
|
|
const rb_callable_method_entry_t *me;
|
|
rb_thread_t *th = GET_THREAD();
|
|
int respond = check_funcall_respond_to(th, klass, recv, mid);
|
|
|
|
if (!respond)
|
|
return def;
|
|
|
|
me = rb_search_method_entry(recv, mid);
|
|
if (!check_funcall_callable(th, me)) {
|
|
return check_funcall_missing(th, klass, recv, mid, argc, argv,
|
|
respond, def);
|
|
}
|
|
stack_check(th);
|
|
return vm_call0(th, recv, mid, argc, argv, me);
|
|
}
|
|
|
|
VALUE
|
|
rb_check_funcall_with_hook(VALUE recv, ID mid, int argc, const VALUE *argv,
|
|
rb_check_funcall_hook *hook, VALUE arg)
|
|
{
|
|
VALUE klass = CLASS_OF(recv);
|
|
const rb_callable_method_entry_t *me;
|
|
rb_thread_t *th = GET_THREAD();
|
|
int respond = check_funcall_respond_to(th, klass, recv, mid);
|
|
|
|
if (!respond) {
|
|
(*hook)(FALSE, recv, mid, argc, argv, arg);
|
|
return Qundef;
|
|
}
|
|
|
|
me = rb_search_method_entry(recv, mid);
|
|
if (!check_funcall_callable(th, me)) {
|
|
VALUE ret = check_funcall_missing(th, klass, recv, mid, argc, argv,
|
|
respond, Qundef);
|
|
(*hook)(ret != Qundef, recv, mid, argc, argv, arg);
|
|
return ret;
|
|
}
|
|
stack_check(th);
|
|
(*hook)(TRUE, recv, mid, argc, argv, arg);
|
|
return vm_call0(th, recv, mid, argc, argv, me);
|
|
}
|
|
|
|
static const char *
|
|
rb_type_str(enum ruby_value_type type)
|
|
{
|
|
#define type_case(t) case t: return #t;
|
|
switch (type) {
|
|
type_case(T_NONE)
|
|
type_case(T_OBJECT)
|
|
type_case(T_CLASS)
|
|
type_case(T_MODULE)
|
|
type_case(T_FLOAT)
|
|
type_case(T_STRING)
|
|
type_case(T_REGEXP)
|
|
type_case(T_ARRAY)
|
|
type_case(T_HASH)
|
|
type_case(T_STRUCT)
|
|
type_case(T_BIGNUM)
|
|
type_case(T_FILE)
|
|
type_case(T_DATA)
|
|
type_case(T_MATCH)
|
|
type_case(T_COMPLEX)
|
|
type_case(T_RATIONAL)
|
|
type_case(T_NIL)
|
|
type_case(T_TRUE)
|
|
type_case(T_FALSE)
|
|
type_case(T_SYMBOL)
|
|
type_case(T_FIXNUM)
|
|
type_case(T_IMEMO)
|
|
type_case(T_UNDEF)
|
|
type_case(T_NODE)
|
|
type_case(T_ICLASS)
|
|
type_case(T_ZOMBIE)
|
|
default: return NULL;
|
|
}
|
|
#undef type_case
|
|
}
|
|
|
|
static inline const rb_callable_method_entry_t *
|
|
rb_search_method_entry(VALUE recv, ID mid)
|
|
{
|
|
VALUE klass = CLASS_OF(recv);
|
|
|
|
if (!klass) {
|
|
VALUE flags;
|
|
if (SPECIAL_CONST_P(recv)) {
|
|
rb_raise(rb_eNotImpError,
|
|
"method `%"PRIsVALUE"' called on unexpected immediate object (%p)",
|
|
rb_id2str(mid), (void *)recv);
|
|
}
|
|
flags = RBASIC(recv)->flags;
|
|
if (flags == 0) {
|
|
rb_raise(rb_eNotImpError,
|
|
"method `%"PRIsVALUE"' called on terminated object"
|
|
" (%p flags=0x%"PRIxVALUE")",
|
|
rb_id2str(mid), (void *)recv, flags);
|
|
}
|
|
else {
|
|
int type = BUILTIN_TYPE(recv);
|
|
const char *typestr = rb_type_str(type);
|
|
if (typestr && T_OBJECT <= type && type < T_NIL)
|
|
rb_raise(rb_eNotImpError,
|
|
"method `%"PRIsVALUE"' called on hidden %s object"
|
|
" (%p flags=0x%"PRIxVALUE")",
|
|
rb_id2str(mid), typestr, (void *)recv, flags);
|
|
if (typestr)
|
|
rb_raise(rb_eNotImpError,
|
|
"method `%"PRIsVALUE"' called on unexpected %s object"
|
|
" (%p flags=0x%"PRIxVALUE")",
|
|
rb_id2str(mid), typestr, (void *)recv, flags);
|
|
else
|
|
rb_raise(rb_eNotImpError,
|
|
"method `%"PRIsVALUE"' called on broken T_???" "(0x%02x) object"
|
|
" (%p flags=0x%"PRIxVALUE")",
|
|
rb_id2str(mid), type, (void *)recv, flags);
|
|
}
|
|
}
|
|
return rb_callable_method_entry(klass, mid);
|
|
}
|
|
|
|
static inline enum method_missing_reason
|
|
rb_method_call_status(rb_thread_t *th, const rb_callable_method_entry_t *me, call_type scope, VALUE self)
|
|
{
|
|
VALUE klass;
|
|
ID oid;
|
|
rb_method_visibility_t visi;
|
|
|
|
if (UNDEFINED_METHOD_ENTRY_P(me)) {
|
|
undefined:
|
|
return scope == CALL_VCALL ? MISSING_VCALL : MISSING_NOENTRY;
|
|
}
|
|
if (me->def->type == VM_METHOD_TYPE_REFINED) {
|
|
me = rb_resolve_refined_method_callable(Qnil, me);
|
|
if (UNDEFINED_METHOD_ENTRY_P(me)) goto undefined;
|
|
}
|
|
|
|
klass = me->owner;
|
|
oid = me->def->original_id;
|
|
visi = METHOD_ENTRY_VISI(me);
|
|
|
|
if (oid != idMethodMissing) {
|
|
/* receiver specified form for private method */
|
|
if (UNLIKELY(visi != METHOD_VISI_PUBLIC)) {
|
|
if (visi == METHOD_VISI_PRIVATE && scope == CALL_PUBLIC) {
|
|
return MISSING_PRIVATE;
|
|
}
|
|
|
|
/* self must be kind of a specified form for protected method */
|
|
if (visi == METHOD_VISI_PROTECTED && scope == CALL_PUBLIC) {
|
|
VALUE defined_class = klass;
|
|
|
|
if (RB_TYPE_P(defined_class, T_ICLASS)) {
|
|
defined_class = RBASIC(defined_class)->klass;
|
|
}
|
|
|
|
if (self == Qundef || !rb_obj_is_kind_of(self, defined_class)) {
|
|
return MISSING_PROTECTED;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return MISSING_NONE;
|
|
}
|
|
|
|
|
|
/*!
|
|
* \internal
|
|
* calls the specified method.
|
|
*
|
|
* This function is called by functions in rb_call* family.
|
|
* \param recv receiver
|
|
* \param mid an ID that represents the name of the method
|
|
* \param argc the number of method arguments
|
|
* \param argv a pointer to an array of method arguments
|
|
* \param scope
|
|
*/
|
|
static inline VALUE
|
|
rb_call(VALUE recv, ID mid, int argc, const VALUE *argv, call_type scope)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
return rb_call0(recv, mid, argc, argv, scope, th->cfp->self);
|
|
}
|
|
|
|
NORETURN(static void raise_method_missing(rb_thread_t *th, int argc, const VALUE *argv,
|
|
VALUE obj, enum method_missing_reason call_status));
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.method_missing(symbol [, *args] ) -> result
|
|
*
|
|
* Invoked by Ruby when <i>obj</i> is sent a message it cannot handle.
|
|
* <i>symbol</i> is the symbol for the method called, and <i>args</i>
|
|
* are any arguments that were passed to it. By default, the interpreter
|
|
* raises an error when this method is called. However, it is possible
|
|
* to override the method to provide more dynamic behavior.
|
|
* If it is decided that a particular method should not be handled, then
|
|
* <i>super</i> should be called, so that ancestors can pick up the
|
|
* missing method.
|
|
* The example below creates
|
|
* a class <code>Roman</code>, which responds to methods with names
|
|
* consisting of roman numerals, returning the corresponding integer
|
|
* values.
|
|
*
|
|
* class Roman
|
|
* def roman_to_int(str)
|
|
* # ...
|
|
* end
|
|
* def method_missing(methId)
|
|
* str = methId.id2name
|
|
* roman_to_int(str)
|
|
* end
|
|
* end
|
|
*
|
|
* r = Roman.new
|
|
* r.iv #=> 4
|
|
* r.xxiii #=> 23
|
|
* r.mm #=> 2000
|
|
*/
|
|
|
|
static VALUE
|
|
rb_method_missing(int argc, const VALUE *argv, VALUE obj)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
raise_method_missing(th, argc, argv, obj, th->method_missing_reason);
|
|
UNREACHABLE;
|
|
}
|
|
|
|
static VALUE
|
|
make_no_method_exception(VALUE exc, VALUE format, VALUE obj,
|
|
int argc, const VALUE *argv, int priv)
|
|
{
|
|
int n = 0;
|
|
enum {
|
|
arg_mesg,
|
|
arg_name,
|
|
arg_args,
|
|
arg_priv,
|
|
args_size
|
|
};
|
|
VALUE args[args_size];
|
|
|
|
if (!format) {
|
|
format = rb_fstring_cstr("undefined method `%s' for %s%s%s");
|
|
}
|
|
args[n++] = rb_name_err_mesg_new(format, obj, argv[0]);
|
|
args[n++] = argv[0];
|
|
if (exc == rb_eNoMethodError) {
|
|
args[n++] = rb_ary_new4(argc - 1, argv + 1);
|
|
args[n++] = priv ? Qtrue : Qfalse;
|
|
}
|
|
return rb_class_new_instance(n, args, exc);
|
|
}
|
|
|
|
static void
|
|
raise_method_missing(rb_thread_t *th, int argc, const VALUE *argv, VALUE obj,
|
|
enum method_missing_reason last_call_status)
|
|
{
|
|
VALUE exc = rb_eNoMethodError;
|
|
VALUE format = 0;
|
|
|
|
if (UNLIKELY(argc == 0)) {
|
|
rb_raise(rb_eArgError, "no method name given");
|
|
}
|
|
else if (UNLIKELY(!SYMBOL_P(argv[0]))) {
|
|
const VALUE e = rb_eArgError; /* TODO: TypeError? */
|
|
rb_raise(e, "method name must be a Symbol but %"PRIsVALUE" is given",
|
|
rb_obj_class(argv[0]));
|
|
}
|
|
|
|
stack_check(th);
|
|
|
|
if (last_call_status & MISSING_PRIVATE) {
|
|
format = rb_fstring_cstr("private method `%s' called for %s%s%s");
|
|
}
|
|
else if (last_call_status & MISSING_PROTECTED) {
|
|
format = rb_fstring_cstr("protected method `%s' called for %s%s%s");
|
|
}
|
|
else if (last_call_status & MISSING_VCALL) {
|
|
format = rb_fstring_cstr("undefined local variable or method `%s' for %s%s%s");
|
|
exc = rb_eNameError;
|
|
}
|
|
else if (last_call_status & MISSING_SUPER) {
|
|
format = rb_fstring_cstr("super: no superclass method `%s' for %s%s%s");
|
|
}
|
|
|
|
{
|
|
exc = make_no_method_exception(exc, format, obj, argc, argv,
|
|
last_call_status & (MISSING_FCALL|MISSING_VCALL));
|
|
if (!(last_call_status & MISSING_MISSING)) {
|
|
rb_vm_pop_cfunc_frame();
|
|
}
|
|
rb_exc_raise(exc);
|
|
}
|
|
}
|
|
|
|
static inline VALUE
|
|
method_missing(VALUE obj, ID id, int argc, const VALUE *argv, enum method_missing_reason call_status)
|
|
{
|
|
VALUE *nargv, result, work, klass;
|
|
rb_thread_t *th = GET_THREAD();
|
|
VALUE block_handler = vm_passed_block_handler(th);
|
|
const rb_callable_method_entry_t *me;
|
|
|
|
th->method_missing_reason = call_status;
|
|
|
|
if (id == idMethodMissing) {
|
|
missing:
|
|
raise_method_missing(th, argc, argv, obj, call_status | MISSING_MISSING);
|
|
}
|
|
|
|
nargv = ALLOCV_N(VALUE, work, argc + 1);
|
|
nargv[0] = ID2SYM(id);
|
|
MEMCPY(nargv + 1, argv, VALUE, argc);
|
|
++argc;
|
|
argv = nargv;
|
|
|
|
klass = CLASS_OF(obj);
|
|
if (!klass) goto missing;
|
|
me = rb_callable_method_entry(klass, idMethodMissing);
|
|
if (!me || METHOD_ENTRY_BASIC(me)) goto missing;
|
|
vm_passed_block_handler_set(th, block_handler);
|
|
result = vm_call0(th, obj, idMethodMissing, argc, argv, me);
|
|
if (work) ALLOCV_END(work);
|
|
return result;
|
|
}
|
|
|
|
void
|
|
rb_raise_method_missing(rb_thread_t *th, int argc, const VALUE *argv,
|
|
VALUE obj, int call_status)
|
|
{
|
|
vm_passed_block_handler_set(th, VM_BLOCK_HANDLER_NONE);
|
|
raise_method_missing(th, argc, argv, obj, call_status | MISSING_MISSING);
|
|
}
|
|
|
|
/*!
|
|
* Calls a method
|
|
* \param recv receiver of the method
|
|
* \param mid an ID that represents the name of the method
|
|
* \param args an Array object which contains method arguments
|
|
*
|
|
* \pre \a args must refer an Array object.
|
|
*/
|
|
VALUE
|
|
rb_apply(VALUE recv, ID mid, VALUE args)
|
|
{
|
|
int argc;
|
|
VALUE *argv, ret;
|
|
|
|
argc = RARRAY_LENINT(args);
|
|
if (argc >= 0x100) {
|
|
args = rb_ary_subseq(args, 0, argc);
|
|
RBASIC_CLEAR_CLASS(args);
|
|
OBJ_FREEZE(args);
|
|
ret = rb_call(recv, mid, argc, RARRAY_CONST_PTR(args), CALL_FCALL);
|
|
RB_GC_GUARD(args);
|
|
return ret;
|
|
}
|
|
argv = ALLOCA_N(VALUE, argc);
|
|
MEMCPY(argv, RARRAY_CONST_PTR(args), VALUE, argc);
|
|
return rb_call(recv, mid, argc, argv, CALL_FCALL);
|
|
}
|
|
|
|
/*!
|
|
* Calls a method
|
|
* \param recv receiver of the method
|
|
* \param mid an ID that represents the name of the method
|
|
* \param n the number of arguments
|
|
* \param ... arbitrary number of method arguments
|
|
*
|
|
* \pre each of arguments after \a n must be a VALUE.
|
|
*/
|
|
VALUE
|
|
rb_funcall(VALUE recv, ID mid, int n, ...)
|
|
{
|
|
VALUE *argv;
|
|
va_list ar;
|
|
|
|
if (n > 0) {
|
|
long i;
|
|
|
|
va_init_list(ar, n);
|
|
|
|
argv = ALLOCA_N(VALUE, n);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
argv[i] = va_arg(ar, VALUE);
|
|
}
|
|
va_end(ar);
|
|
}
|
|
else {
|
|
argv = 0;
|
|
}
|
|
return rb_call(recv, mid, n, argv, CALL_FCALL);
|
|
}
|
|
|
|
/*!
|
|
* Calls a method
|
|
* \param recv receiver of the method
|
|
* \param mid an ID that represents the name of the method
|
|
* \param argc the number of arguments
|
|
* \param argv pointer to an array of method arguments
|
|
*/
|
|
VALUE
|
|
rb_funcallv(VALUE recv, ID mid, int argc, const VALUE *argv)
|
|
{
|
|
return rb_call(recv, mid, argc, argv, CALL_FCALL);
|
|
}
|
|
|
|
/*!
|
|
* Calls a method.
|
|
*
|
|
* Same as rb_funcallv but this function can call only public methods.
|
|
* \param recv receiver of the method
|
|
* \param mid an ID that represents the name of the method
|
|
* \param argc the number of arguments
|
|
* \param argv pointer to an array of method arguments
|
|
*/
|
|
VALUE
|
|
rb_funcallv_public(VALUE recv, ID mid, int argc, const VALUE *argv)
|
|
{
|
|
return rb_call(recv, mid, argc, argv, CALL_PUBLIC);
|
|
}
|
|
|
|
VALUE
|
|
rb_funcall_passing_block(VALUE recv, ID mid, int argc, const VALUE *argv)
|
|
{
|
|
PASS_PASSED_BLOCK_HANDLER();
|
|
return rb_call(recv, mid, argc, argv, CALL_PUBLIC);
|
|
}
|
|
|
|
VALUE
|
|
rb_funcall_with_block(VALUE recv, ID mid, int argc, const VALUE *argv, VALUE passed_procval)
|
|
{
|
|
if (!NIL_P(passed_procval)) {
|
|
rb_thread_t *th = GET_THREAD();
|
|
vm_passed_block_handler_set(th, passed_procval);
|
|
}
|
|
|
|
return rb_call(recv, mid, argc, argv, CALL_PUBLIC);
|
|
}
|
|
|
|
static VALUE *
|
|
current_vm_stack_arg(rb_thread_t *th, const VALUE *argv)
|
|
{
|
|
rb_control_frame_t *prev_cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp);
|
|
if (RUBY_VM_CONTROL_FRAME_STACK_OVERFLOW_P(th, prev_cfp)) return NULL;
|
|
if (prev_cfp->sp + 1 != argv) return NULL;
|
|
return prev_cfp->sp + 1;
|
|
}
|
|
|
|
static VALUE
|
|
send_internal(int argc, const VALUE *argv, VALUE recv, call_type scope)
|
|
{
|
|
ID id;
|
|
VALUE vid;
|
|
VALUE self;
|
|
VALUE ret, vargv = 0;
|
|
rb_thread_t *th = GET_THREAD();
|
|
|
|
if (scope == CALL_PUBLIC) {
|
|
self = Qundef;
|
|
}
|
|
else {
|
|
self = RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp)->self;
|
|
}
|
|
|
|
if (argc == 0) {
|
|
rb_raise(rb_eArgError, "no method name given");
|
|
}
|
|
|
|
vid = *argv;
|
|
|
|
id = rb_check_id(&vid);
|
|
if (!id) {
|
|
if (rb_method_basic_definition_p(CLASS_OF(recv), idMethodMissing)) {
|
|
VALUE exc = make_no_method_exception(rb_eNoMethodError, 0,
|
|
recv, argc, argv,
|
|
scope != CALL_PUBLIC);
|
|
rb_exc_raise(exc);
|
|
}
|
|
if (!SYMBOL_P(*argv)) {
|
|
VALUE *tmp_argv = current_vm_stack_arg(th, argv);
|
|
vid = rb_str_intern(vid);
|
|
if (tmp_argv) {
|
|
tmp_argv[0] = vid;
|
|
}
|
|
else if (argc > 1) {
|
|
tmp_argv = ALLOCV_N(VALUE, vargv, argc);
|
|
tmp_argv[0] = vid;
|
|
MEMCPY(tmp_argv+1, argv+1, VALUE, argc-1);
|
|
argv = tmp_argv;
|
|
}
|
|
else {
|
|
argv = &vid;
|
|
}
|
|
}
|
|
id = idMethodMissing;
|
|
th->method_missing_reason = MISSING_NOENTRY;
|
|
}
|
|
else {
|
|
argv++; argc--;
|
|
}
|
|
PASS_PASSED_BLOCK_HANDLER_TH(th);
|
|
ret = rb_call0(recv, id, argc, argv, scope, self);
|
|
ALLOCV_END(vargv);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* foo.send(symbol [, args...]) -> obj
|
|
* foo.__send__(symbol [, args...]) -> obj
|
|
* foo.send(string [, args...]) -> obj
|
|
* foo.__send__(string [, args...]) -> obj
|
|
*
|
|
* Invokes the method identified by _symbol_, passing it any
|
|
* arguments specified. You can use <code>__send__</code> if the name
|
|
* +send+ clashes with an existing method in _obj_.
|
|
* When the method is identified by a string, the string is converted
|
|
* to a symbol.
|
|
*
|
|
* class Klass
|
|
* def hello(*args)
|
|
* "Hello " + args.join(' ')
|
|
* end
|
|
* end
|
|
* k = Klass.new
|
|
* k.send :hello, "gentle", "readers" #=> "Hello gentle readers"
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_send(int argc, VALUE *argv, VALUE recv)
|
|
{
|
|
return send_internal(argc, argv, recv, CALL_FCALL);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.public_send(symbol [, args...]) -> obj
|
|
* obj.public_send(string [, args...]) -> obj
|
|
*
|
|
* Invokes the method identified by _symbol_, passing it any
|
|
* arguments specified. Unlike send, public_send calls public
|
|
* methods only.
|
|
* When the method is identified by a string, the string is converted
|
|
* to a symbol.
|
|
*
|
|
* 1.public_send(:puts, "hello") # causes NoMethodError
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_public_send(int argc, VALUE *argv, VALUE recv)
|
|
{
|
|
return send_internal(argc, argv, recv, CALL_PUBLIC);
|
|
}
|
|
|
|
/* yield */
|
|
|
|
static inline VALUE
|
|
rb_yield_0(int argc, const VALUE * argv)
|
|
{
|
|
return vm_yield(GET_THREAD(), argc, argv);
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_1(VALUE val)
|
|
{
|
|
return rb_yield_0(1, &val);
|
|
}
|
|
|
|
VALUE
|
|
rb_yield(VALUE val)
|
|
{
|
|
if (val == Qundef) {
|
|
return rb_yield_0(0, 0);
|
|
}
|
|
else {
|
|
return rb_yield_1(val);
|
|
}
|
|
}
|
|
|
|
#undef rb_yield_values
|
|
VALUE
|
|
rb_yield_values(int n, ...)
|
|
{
|
|
if (n == 0) {
|
|
return rb_yield_0(0, 0);
|
|
}
|
|
else {
|
|
int i;
|
|
VALUE *argv;
|
|
va_list args;
|
|
argv = ALLOCA_N(VALUE, n);
|
|
|
|
va_init_list(args, n);
|
|
for (i=0; i<n; i++) {
|
|
argv[i] = va_arg(args, VALUE);
|
|
}
|
|
va_end(args);
|
|
|
|
return rb_yield_0(n, argv);
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_values2(int argc, const VALUE *argv)
|
|
{
|
|
return rb_yield_0(argc, argv);
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_splat(VALUE values)
|
|
{
|
|
VALUE tmp = rb_check_array_type(values);
|
|
VALUE v;
|
|
if (NIL_P(tmp)) {
|
|
rb_raise(rb_eArgError, "not an array");
|
|
}
|
|
v = rb_yield_0(RARRAY_LENINT(tmp), RARRAY_CONST_PTR(tmp));
|
|
RB_GC_GUARD(tmp);
|
|
return v;
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_lambda(VALUE values)
|
|
{
|
|
return vm_yield_lambda_splattable(GET_THREAD(), values);
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_block(VALUE val, VALUE arg, int argc, const VALUE *argv, VALUE blockarg)
|
|
{
|
|
return vm_yield_with_block(GET_THREAD(), argc, argv,
|
|
NIL_P(blockarg) ? VM_BLOCK_HANDLER_NONE : blockarg);
|
|
}
|
|
|
|
static VALUE
|
|
loop_i(void)
|
|
{
|
|
for (;;) {
|
|
rb_yield_0(0, 0);
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
static VALUE
|
|
loop_stop(VALUE dummy, VALUE exc)
|
|
{
|
|
return rb_attr_get(exc, id_result);
|
|
}
|
|
|
|
static VALUE
|
|
rb_f_loop_size(VALUE self, VALUE args, VALUE eobj)
|
|
{
|
|
return DBL2NUM(INFINITY);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* loop { block }
|
|
* loop -> an_enumerator
|
|
*
|
|
* Repeatedly executes the block.
|
|
*
|
|
* If no block is given, an enumerator is returned instead.
|
|
*
|
|
* loop do
|
|
* print "Input: "
|
|
* line = gets
|
|
* break if !line or line =~ /^qQ/
|
|
* # ...
|
|
* end
|
|
*
|
|
* StopIteration raised in the block breaks the loop. In this case,
|
|
* loop returns the "result" value stored in the exception.
|
|
*
|
|
* enum = Enumerator.new { |y|
|
|
* y << "one"
|
|
* y << "two"
|
|
* :ok
|
|
* }
|
|
*
|
|
* result = loop {
|
|
* puts enum.next
|
|
* } #=> :ok
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_loop(VALUE self)
|
|
{
|
|
RETURN_SIZED_ENUMERATOR(self, 0, 0, rb_f_loop_size);
|
|
return rb_rescue2(loop_i, (VALUE)0, loop_stop, (VALUE)0, rb_eStopIteration, (VALUE)0);
|
|
}
|
|
|
|
#if VMDEBUG
|
|
static const char *
|
|
vm_frametype_name(const rb_control_frame_t *cfp);
|
|
#endif
|
|
|
|
static VALUE
|
|
rb_iterate0(VALUE (* it_proc) (VALUE), VALUE data1,
|
|
const struct vm_ifunc *const ifunc,
|
|
rb_thread_t *const th)
|
|
{
|
|
int state;
|
|
volatile VALUE retval = Qnil;
|
|
rb_control_frame_t *const cfp = th->cfp;
|
|
|
|
TH_PUSH_TAG(th);
|
|
state = TH_EXEC_TAG();
|
|
if (state == 0) {
|
|
iter_retry:
|
|
{
|
|
VALUE block_handler;
|
|
|
|
if (ifunc) {
|
|
struct rb_captured_block *captured = VM_CFP_TO_CAPTURED_BLOCK(cfp);
|
|
captured->code.ifunc = ifunc;
|
|
block_handler = VM_BH_FROM_IFUNC_BLOCK(captured);
|
|
}
|
|
else {
|
|
block_handler = VM_CF_BLOCK_HANDLER(cfp);
|
|
}
|
|
vm_passed_block_handler_set(th, block_handler);
|
|
}
|
|
retval = (*it_proc) (data1);
|
|
}
|
|
else if (state == TAG_BREAK || state == TAG_RETRY) {
|
|
const struct vm_throw_data *const err = (struct vm_throw_data *)th->errinfo;
|
|
const rb_control_frame_t *const escape_cfp = THROW_DATA_CATCH_FRAME(err);
|
|
|
|
if (cfp == escape_cfp) {
|
|
rb_vm_rewind_cfp(th, cfp);
|
|
|
|
state = 0;
|
|
th->state = 0;
|
|
th->errinfo = Qnil;
|
|
|
|
if (state == TAG_RETRY) goto iter_retry;
|
|
retval = THROW_DATA_VAL(err);
|
|
}
|
|
else if (0) {
|
|
SDR(); fprintf(stderr, "%p, %p\n", cfp, escape_cfp);
|
|
}
|
|
}
|
|
TH_POP_TAG();
|
|
|
|
if (state) {
|
|
TH_JUMP_TAG(th, state);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
VALUE
|
|
rb_iterate(VALUE (* it_proc)(VALUE), VALUE data1,
|
|
VALUE (* bl_proc)(ANYARGS), VALUE data2)
|
|
{
|
|
return rb_iterate0(it_proc, data1,
|
|
bl_proc ? IFUNC_NEW(bl_proc, data2, rb_frame_this_func()) : 0,
|
|
GET_THREAD());
|
|
}
|
|
|
|
struct iter_method_arg {
|
|
VALUE obj;
|
|
ID mid;
|
|
int argc;
|
|
const VALUE *argv;
|
|
};
|
|
|
|
static VALUE
|
|
iterate_method(VALUE obj)
|
|
{
|
|
const struct iter_method_arg * arg =
|
|
(struct iter_method_arg *) obj;
|
|
|
|
return rb_call(arg->obj, arg->mid, arg->argc, arg->argv, CALL_FCALL);
|
|
}
|
|
|
|
VALUE
|
|
rb_block_call(VALUE obj, ID mid, int argc, const VALUE * argv,
|
|
VALUE (*bl_proc) (ANYARGS), VALUE data2)
|
|
{
|
|
struct iter_method_arg arg;
|
|
|
|
arg.obj = obj;
|
|
arg.mid = mid;
|
|
arg.argc = argc;
|
|
arg.argv = argv;
|
|
return rb_iterate(iterate_method, (VALUE)&arg, bl_proc, data2);
|
|
}
|
|
|
|
static VALUE
|
|
iterate_check_method(VALUE obj)
|
|
{
|
|
const struct iter_method_arg * arg =
|
|
(struct iter_method_arg *) obj;
|
|
|
|
return rb_check_funcall(arg->obj, arg->mid, arg->argc, arg->argv);
|
|
}
|
|
|
|
VALUE
|
|
rb_check_block_call(VALUE obj, ID mid, int argc, const VALUE *argv,
|
|
VALUE (*bl_proc) (ANYARGS), VALUE data2)
|
|
{
|
|
struct iter_method_arg arg;
|
|
|
|
arg.obj = obj;
|
|
arg.mid = mid;
|
|
arg.argc = argc;
|
|
arg.argv = argv;
|
|
return rb_iterate(iterate_check_method, (VALUE)&arg, bl_proc, data2);
|
|
}
|
|
|
|
VALUE
|
|
rb_each(VALUE obj)
|
|
{
|
|
return rb_call(obj, idEach, 0, 0, CALL_FCALL);
|
|
}
|
|
|
|
static VALUE
|
|
adjust_backtrace_in_eval(rb_thread_t *th, VALUE errinfo)
|
|
{
|
|
VALUE errat = rb_get_backtrace(errinfo);
|
|
VALUE mesg = rb_attr_get(errinfo, id_mesg);
|
|
if (RB_TYPE_P(errat, T_ARRAY)) {
|
|
VALUE bt2 = rb_vm_backtrace_str_ary(th, 0, 0);
|
|
if (RARRAY_LEN(bt2) > 0) {
|
|
if (RB_TYPE_P(mesg, T_STRING) && !RSTRING_LEN(mesg)) {
|
|
rb_ivar_set(errinfo, id_mesg, RARRAY_AREF(errat, 0));
|
|
}
|
|
RARRAY_ASET(errat, 0, RARRAY_AREF(bt2, 0));
|
|
}
|
|
}
|
|
return errinfo;
|
|
}
|
|
|
|
static VALUE
|
|
eval_string_with_cref(VALUE self, VALUE src, VALUE scope, rb_cref_t *const cref_arg,
|
|
VALUE filename, int lineno)
|
|
{
|
|
int state;
|
|
VALUE result = Qundef;
|
|
rb_thread_t *volatile th = GET_THREAD();
|
|
struct rb_block block;
|
|
const struct rb_block *base_block;
|
|
volatile VALUE file;
|
|
volatile int line;
|
|
|
|
file = filename ? filename : rb_source_location(&lineno);
|
|
line = lineno;
|
|
|
|
{
|
|
rb_cref_t *cref = cref_arg;
|
|
rb_binding_t *bind = 0;
|
|
const rb_iseq_t *iseq;
|
|
VALUE absolute_path = Qnil;
|
|
VALUE fname;
|
|
|
|
if (file != Qundef) {
|
|
absolute_path = file;
|
|
}
|
|
|
|
if (!NIL_P(scope)) {
|
|
bind = Check_TypedStruct(scope, &ruby_binding_data_type);
|
|
|
|
if (NIL_P(absolute_path) && !NIL_P(bind->path)) {
|
|
file = bind->path;
|
|
line = bind->first_lineno;
|
|
absolute_path = rb_current_realfilepath();
|
|
}
|
|
base_block = &bind->block;
|
|
}
|
|
else {
|
|
rb_control_frame_t *cfp = rb_vm_get_ruby_level_next_cfp(th, th->cfp);
|
|
|
|
if (cfp != 0) {
|
|
block.as.captured = *VM_CFP_TO_CAPTURED_BLOCK(cfp);
|
|
block.as.captured.self = self;
|
|
block.as.captured.code.iseq = cfp->iseq;
|
|
block.type = block_type_iseq;
|
|
base_block = █
|
|
}
|
|
else {
|
|
rb_raise(rb_eRuntimeError, "Can't eval on top of Fiber or Thread");
|
|
}
|
|
}
|
|
|
|
if ((fname = file) == Qundef) {
|
|
fname = rb_usascii_str_new_cstr("(eval)");
|
|
}
|
|
|
|
if (RTEST(fname))
|
|
fname = rb_fstring(fname);
|
|
if (RTEST(absolute_path))
|
|
absolute_path = rb_fstring(absolute_path);
|
|
|
|
/* make eval iseq */
|
|
iseq = rb_iseq_compile_with_option(src, fname, absolute_path, INT2FIX(line), base_block, Qnil);
|
|
|
|
if (!iseq) {
|
|
rb_exc_raise(adjust_backtrace_in_eval(th, th->errinfo));
|
|
}
|
|
|
|
/* TODO: what the code checking? */
|
|
if (!cref && base_block->as.captured.code.val) {
|
|
if (NIL_P(scope)) {
|
|
rb_cref_t *orig_cref = rb_vm_get_cref(vm_block_ep(base_block));
|
|
cref = vm_cref_dup(orig_cref);
|
|
}
|
|
else {
|
|
cref = NULL; /* use stacked CREF */
|
|
}
|
|
}
|
|
vm_set_eval_stack(th, iseq, cref, base_block);
|
|
|
|
if (0) { /* for debug */
|
|
VALUE disasm = rb_iseq_disasm(iseq);
|
|
printf("%s\n", StringValuePtr(disasm));
|
|
}
|
|
|
|
/* save new env */
|
|
if (bind && iseq->body->local_table_size > 0) {
|
|
vm_bind_update_env(bind, vm_make_env_object(th, th->cfp));
|
|
}
|
|
}
|
|
|
|
if (file != Qundef) {
|
|
/* kick */
|
|
return vm_exec(th);
|
|
}
|
|
|
|
TH_PUSH_TAG(th);
|
|
if ((state = TH_EXEC_TAG()) == 0) {
|
|
result = vm_exec(th);
|
|
}
|
|
TH_POP_TAG();
|
|
|
|
if (state) {
|
|
if (state == TAG_RAISE) {
|
|
adjust_backtrace_in_eval(th, th->errinfo);
|
|
}
|
|
TH_JUMP_TAG(th, state);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static VALUE
|
|
eval_string(VALUE self, VALUE src, VALUE scope, VALUE file, int line)
|
|
{
|
|
return eval_string_with_cref(self, src, scope, 0, file, line);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* eval(string [, binding [, filename [,lineno]]]) -> obj
|
|
*
|
|
* Evaluates the Ruby expression(s) in <em>string</em>. If
|
|
* <em>binding</em> is given, which must be a <code>Binding</code>
|
|
* object, the evaluation is performed in its context. If the
|
|
* optional <em>filename</em> and <em>lineno</em> parameters are
|
|
* present, they will be used when reporting syntax errors.
|
|
*
|
|
* def get_binding(str)
|
|
* return binding
|
|
* end
|
|
* str = "hello"
|
|
* eval "str + ' Fred'" #=> "hello Fred"
|
|
* eval "str + ' Fred'", get_binding("bye") #=> "bye Fred"
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_eval(int argc, const VALUE *argv, VALUE self)
|
|
{
|
|
VALUE src, scope, vfile, vline;
|
|
VALUE file = Qundef;
|
|
int line = 1;
|
|
|
|
rb_scan_args(argc, argv, "13", &src, &scope, &vfile, &vline);
|
|
SafeStringValue(src);
|
|
if (argc >= 3) {
|
|
StringValue(vfile);
|
|
}
|
|
if (argc >= 4) {
|
|
line = NUM2INT(vline);
|
|
}
|
|
|
|
if (!NIL_P(vfile))
|
|
file = vfile;
|
|
return eval_string(self, src, scope, file, line);
|
|
}
|
|
|
|
/** @note This function name is not stable. */
|
|
VALUE
|
|
ruby_eval_string_from_file(const char *str, const char *filename)
|
|
{
|
|
VALUE file = filename ? rb_str_new_cstr(filename) : 0;
|
|
return eval_string(rb_vm_top_self(), rb_str_new2(str), Qnil, file, 1);
|
|
}
|
|
|
|
struct eval_string_from_file_arg {
|
|
VALUE str;
|
|
VALUE filename;
|
|
};
|
|
|
|
static VALUE
|
|
eval_string_from_file_helper(VALUE data)
|
|
{
|
|
const struct eval_string_from_file_arg *const arg = (struct eval_string_from_file_arg*)data;
|
|
return eval_string(rb_vm_top_self(), arg->str, Qnil, arg->filename, 1);
|
|
}
|
|
|
|
VALUE
|
|
ruby_eval_string_from_file_protect(const char *str, const char *filename, int *state)
|
|
{
|
|
struct eval_string_from_file_arg arg;
|
|
arg.str = rb_str_new_cstr(str);
|
|
arg.filename = filename ? rb_str_new_cstr(filename) : 0;
|
|
return rb_protect(eval_string_from_file_helper, (VALUE)&arg, state);
|
|
}
|
|
|
|
/**
|
|
* Evaluates the given string in an isolated binding.
|
|
*
|
|
* Here "isolated" means the binding does not inherit any other binding. This
|
|
* behaves same as the binding for required libraries.
|
|
*
|
|
* __FILE__ will be "(eval)", and __LINE__ starts from 1 in the evaluation.
|
|
*
|
|
* @param str Ruby code to evaluate.
|
|
* @return The evaluated result.
|
|
* @throw Exception Raises an exception on error.
|
|
*/
|
|
VALUE
|
|
rb_eval_string(const char *str)
|
|
{
|
|
return ruby_eval_string_from_file(str, "eval");
|
|
}
|
|
|
|
/**
|
|
* Evaluates the given string in an isolated binding.
|
|
*
|
|
* __FILE__ will be "(eval)", and __LINE__ starts from 1 in the evaluation.
|
|
*
|
|
* @sa rb_eval_string
|
|
* @param str Ruby code to evaluate.
|
|
* @param state Being set to zero if succeeded. Nonzero if an error occurred.
|
|
* @return The evaluated result if succeeded, an undefined value if otherwise.
|
|
*/
|
|
VALUE
|
|
rb_eval_string_protect(const char *str, int *state)
|
|
{
|
|
return rb_protect((VALUE (*)(VALUE))rb_eval_string, (VALUE)str, state);
|
|
}
|
|
|
|
/**
|
|
* Evaluates the given string under a module binding in an isolated binding.
|
|
* This is same as the binding for loaded libraries on "load('foo', true)".
|
|
*
|
|
* __FILE__ will be "(eval)", and __LINE__ starts from 1 in the evaluation.
|
|
*
|
|
* @sa rb_eval_string
|
|
* @param str Ruby code to evaluate.
|
|
* @param state Being set to zero if succeeded. Nonzero if an error occurred.
|
|
* @return The evaluated result if succeeded, an undefined value if otherwise.
|
|
*/
|
|
VALUE
|
|
rb_eval_string_wrap(const char *str, int *state)
|
|
{
|
|
int status;
|
|
rb_thread_t *th = GET_THREAD();
|
|
VALUE self = th->top_self;
|
|
VALUE wrapper = th->top_wrapper;
|
|
VALUE val;
|
|
|
|
th->top_wrapper = rb_module_new();
|
|
th->top_self = rb_obj_clone(rb_vm_top_self());
|
|
rb_extend_object(th->top_self, th->top_wrapper);
|
|
|
|
val = rb_eval_string_protect(str, &status);
|
|
|
|
th->top_self = self;
|
|
th->top_wrapper = wrapper;
|
|
|
|
if (state) {
|
|
*state = status;
|
|
}
|
|
else if (status) {
|
|
TH_JUMP_TAG(th, status);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_eval_cmd(VALUE cmd, VALUE arg, int level)
|
|
{
|
|
int state;
|
|
volatile VALUE val = Qnil; /* OK */
|
|
const int VAR_NOCLOBBERED(safe) = rb_safe_level();
|
|
rb_thread_t *const VAR_NOCLOBBERED(th) = GET_THREAD();
|
|
|
|
if (OBJ_TAINTED(cmd)) {
|
|
level = RUBY_SAFE_LEVEL_MAX;
|
|
}
|
|
|
|
TH_PUSH_TAG(th);
|
|
rb_set_safe_level_force(level);
|
|
if ((state = TH_EXEC_TAG()) == 0) {
|
|
if (!RB_TYPE_P(cmd, T_STRING)) {
|
|
val = rb_funcallv(cmd, idCall, RARRAY_LENINT(arg),
|
|
RARRAY_CONST_PTR(arg));
|
|
}
|
|
else {
|
|
val = eval_string(rb_vm_top_self(), cmd, Qnil, 0, 0);
|
|
}
|
|
}
|
|
TH_POP_TAG();
|
|
|
|
rb_set_safe_level_force(safe);
|
|
if (state) TH_JUMP_TAG(th, state);
|
|
return val;
|
|
}
|
|
|
|
/* block eval under the class/module context */
|
|
|
|
static VALUE
|
|
yield_under(VALUE under, VALUE self, int argc, const VALUE *argv)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
rb_control_frame_t *cfp = th->cfp;
|
|
VALUE block_handler = VM_CF_BLOCK_HANDLER(cfp);
|
|
VALUE new_block_handler = 0;
|
|
const struct rb_captured_block *captured = NULL;
|
|
struct rb_captured_block new_captured;
|
|
const VALUE *ep = NULL;
|
|
rb_cref_t *cref;
|
|
int is_lambda = FALSE;
|
|
|
|
if (block_handler != VM_BLOCK_HANDLER_NONE) {
|
|
again:
|
|
switch (vm_block_handler_type(block_handler)) {
|
|
case block_handler_type_iseq:
|
|
captured = VM_BH_TO_CAPT_BLOCK(block_handler);
|
|
new_captured = *captured;
|
|
new_block_handler = VM_BH_FROM_ISEQ_BLOCK(&new_captured);
|
|
break;
|
|
case block_handler_type_ifunc:
|
|
captured = VM_BH_TO_CAPT_BLOCK(block_handler);
|
|
new_captured = *captured;
|
|
new_block_handler = VM_BH_FROM_IFUNC_BLOCK(&new_captured);
|
|
break;
|
|
case block_handler_type_proc:
|
|
is_lambda = rb_proc_lambda_p(block_handler) != Qfalse;
|
|
block_handler = vm_proc_to_block_handler(VM_BH_TO_PROC(block_handler));
|
|
goto again;
|
|
case block_handler_type_symbol:
|
|
return rb_sym_proc_call(SYM2ID(VM_BH_TO_SYMBOL(block_handler)),
|
|
argc, argv, VM_BLOCK_HANDLER_NONE);
|
|
}
|
|
|
|
new_captured.self = self;
|
|
ep = captured->ep;
|
|
|
|
VM_FORCE_WRITE_SPECIAL_CONST(&VM_CF_LEP(th->cfp)[VM_ENV_DATA_INDEX_SPECVAL], new_block_handler);
|
|
}
|
|
|
|
cref = vm_cref_push(th, under, ep, TRUE);
|
|
return vm_yield_with_cref(th, argc, argv, cref, is_lambda);
|
|
}
|
|
|
|
VALUE
|
|
rb_yield_refine_block(VALUE refinement, VALUE refinements)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
VALUE block_handler = VM_CF_BLOCK_HANDLER(th->cfp);
|
|
|
|
if (vm_block_handler_type(block_handler) != block_handler_type_iseq) {
|
|
rb_bug("rb_yield_refine_block: an iseq block is required");
|
|
}
|
|
else {
|
|
const struct rb_captured_block *captured = VM_BH_TO_ISEQ_BLOCK(block_handler);
|
|
struct rb_captured_block new_captured = *captured;
|
|
VALUE new_block_handler = VM_BH_FROM_ISEQ_BLOCK(&new_captured);
|
|
const VALUE *ep = captured->ep;
|
|
rb_cref_t *cref = vm_cref_push(th, refinement, ep, TRUE);
|
|
CREF_REFINEMENTS_SET(cref, refinements);
|
|
VM_FORCE_WRITE_SPECIAL_CONST(&VM_CF_LEP(th->cfp)[VM_ENV_DATA_INDEX_SPECVAL], new_block_handler);
|
|
new_captured.self = refinement;
|
|
return vm_yield_with_cref(th, 0, NULL, cref, FALSE);
|
|
}
|
|
}
|
|
|
|
/* string eval under the class/module context */
|
|
static VALUE
|
|
eval_under(VALUE under, VALUE self, VALUE src, VALUE file, int line)
|
|
{
|
|
rb_cref_t *cref = vm_cref_push(GET_THREAD(), under, NULL, SPECIAL_CONST_P(self) && !NIL_P(under));
|
|
SafeStringValue(src);
|
|
return eval_string_with_cref(self, src, Qnil, cref, file, line);
|
|
}
|
|
|
|
static VALUE
|
|
specific_eval(int argc, const VALUE *argv, VALUE klass, VALUE self)
|
|
{
|
|
if (rb_block_given_p()) {
|
|
rb_check_arity(argc, 0, 0);
|
|
return yield_under(klass, self, 1, &self);
|
|
}
|
|
else {
|
|
VALUE file = Qundef;
|
|
int line = 1;
|
|
VALUE code;
|
|
|
|
rb_check_arity(argc, 1, 3);
|
|
code = argv[0];
|
|
SafeStringValue(code);
|
|
if (argc > 2)
|
|
line = NUM2INT(argv[2]);
|
|
if (argc > 1) {
|
|
file = argv[1];
|
|
if (!NIL_P(file)) StringValue(file);
|
|
}
|
|
return eval_under(klass, self, code, file, line);
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
singleton_class_for_eval(VALUE self)
|
|
{
|
|
if (SPECIAL_CONST_P(self)) {
|
|
return rb_special_singleton_class(self);
|
|
}
|
|
switch (BUILTIN_TYPE(self)) {
|
|
case T_FLOAT: case T_BIGNUM: case T_SYMBOL:
|
|
return Qnil;
|
|
case T_STRING:
|
|
if (FL_TEST_RAW(self, RSTRING_FSTR)) return Qnil;
|
|
default:
|
|
return rb_singleton_class(self);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.instance_eval(string [, filename [, lineno]] ) -> obj
|
|
* obj.instance_eval {|obj| block } -> obj
|
|
*
|
|
* Evaluates a string containing Ruby source code, or the given block,
|
|
* within the context of the receiver (_obj_). In order to set the
|
|
* context, the variable +self+ is set to _obj_ while
|
|
* the code is executing, giving the code access to _obj_'s
|
|
* instance variables and private methods.
|
|
*
|
|
* When <code>instance_eval</code> is given a block, _obj_ is also
|
|
* passed in as the block's only argument.
|
|
*
|
|
* When <code>instance_eval</code> is given a +String+, the optional
|
|
* second and third parameters supply a filename and starting line number
|
|
* that are used when reporting compilation errors.
|
|
*
|
|
* class KlassWithSecret
|
|
* def initialize
|
|
* @secret = 99
|
|
* end
|
|
* private
|
|
* def the_secret
|
|
* "Ssssh! The secret is #{@secret}."
|
|
* end
|
|
* end
|
|
* k = KlassWithSecret.new
|
|
* k.instance_eval { @secret } #=> 99
|
|
* k.instance_eval { the_secret } #=> "Ssssh! The secret is 99."
|
|
* k.instance_eval {|obj| obj == self } #=> true
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_instance_eval(int argc, const VALUE *argv, VALUE self)
|
|
{
|
|
VALUE klass = singleton_class_for_eval(self);
|
|
return specific_eval(argc, argv, klass, self);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.instance_exec(arg...) {|var...| block } -> obj
|
|
*
|
|
* Executes the given block within the context of the receiver
|
|
* (_obj_). In order to set the context, the variable +self+ is set
|
|
* to _obj_ while the code is executing, giving the code access to
|
|
* _obj_'s instance variables. Arguments are passed as block parameters.
|
|
*
|
|
* class KlassWithSecret
|
|
* def initialize
|
|
* @secret = 99
|
|
* end
|
|
* end
|
|
* k = KlassWithSecret.new
|
|
* k.instance_exec(5) {|x| @secret+x } #=> 104
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_instance_exec(int argc, const VALUE *argv, VALUE self)
|
|
{
|
|
VALUE klass = singleton_class_for_eval(self);
|
|
return yield_under(klass, self, argc, argv);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.class_eval(string [, filename [, lineno]]) -> obj
|
|
* mod.class_eval {|mod| block } -> obj
|
|
* mod.module_eval(string [, filename [, lineno]]) -> obj
|
|
* mod.module_eval {|mod| block } -> obj
|
|
*
|
|
* Evaluates the string or block in the context of _mod_, except that when
|
|
* a block is given, constant/class variable lookup is not affected. This
|
|
* can be used to add methods to a class. <code>module_eval</code> returns
|
|
* the result of evaluating its argument. The optional _filename_ and
|
|
* _lineno_ parameters set the text for error messages.
|
|
*
|
|
* class Thing
|
|
* end
|
|
* a = %q{def hello() "Hello there!" end}
|
|
* Thing.module_eval(a)
|
|
* puts Thing.new.hello()
|
|
* Thing.module_eval("invalid code", "dummy", 123)
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* Hello there!
|
|
* dummy:123:in `module_eval': undefined local variable
|
|
* or method `code' for Thing:Class
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_module_eval(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
return specific_eval(argc, argv, mod, mod);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.module_exec(arg...) {|var...| block } -> obj
|
|
* mod.class_exec(arg...) {|var...| block } -> obj
|
|
*
|
|
* Evaluates the given block in the context of the class/module.
|
|
* The method defined in the block will belong to the receiver.
|
|
* Any arguments passed to the method will be passed to the block.
|
|
* This can be used if the block needs to access instance variables.
|
|
*
|
|
* class Thing
|
|
* end
|
|
* Thing.class_exec{
|
|
* def hello() "Hello there!" end
|
|
* }
|
|
* puts Thing.new.hello()
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* Hello there!
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_module_exec(int argc, const VALUE *argv, VALUE mod)
|
|
{
|
|
return yield_under(mod, mod, argc, argv);
|
|
}
|
|
|
|
/*
|
|
* Document-class: UncaughtThrowError
|
|
*
|
|
* Raised when +throw+ is called with a _tag_ which does not have
|
|
* corresponding +catch+ block.
|
|
*
|
|
* throw "foo", "bar"
|
|
*
|
|
* <em>raises the exception:</em>
|
|
*
|
|
* UncaughtThrowError: uncaught throw "foo"
|
|
*/
|
|
|
|
static VALUE
|
|
uncaught_throw_init(int argc, const VALUE *argv, VALUE exc)
|
|
{
|
|
rb_check_arity(argc, 2, UNLIMITED_ARGUMENTS);
|
|
rb_call_super(argc - 2, argv + 2);
|
|
rb_ivar_set(exc, id_tag, argv[0]);
|
|
rb_ivar_set(exc, id_value, argv[1]);
|
|
return exc;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* uncaught_throw.tag -> obj
|
|
*
|
|
* Return the tag object which was called for.
|
|
*/
|
|
|
|
static VALUE
|
|
uncaught_throw_tag(VALUE exc)
|
|
{
|
|
return rb_ivar_get(exc, id_tag);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* uncaught_throw.value -> obj
|
|
*
|
|
* Return the return value which was called for.
|
|
*/
|
|
|
|
static VALUE
|
|
uncaught_throw_value(VALUE exc)
|
|
{
|
|
return rb_ivar_get(exc, id_value);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* uncaught_throw.to_s -> string
|
|
*
|
|
* Returns formatted message with the inspected tag.
|
|
*/
|
|
|
|
static VALUE
|
|
uncaught_throw_to_s(VALUE exc)
|
|
{
|
|
VALUE mesg = rb_attr_get(exc, id_mesg);
|
|
VALUE tag = uncaught_throw_tag(exc);
|
|
return rb_str_format(1, &tag, mesg);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* throw(tag [, obj])
|
|
*
|
|
* Transfers control to the end of the active +catch+ block
|
|
* waiting for _tag_. Raises +UncaughtThrowError+ if there
|
|
* is no +catch+ block for the _tag_. The optional second
|
|
* parameter supplies a return value for the +catch+ block,
|
|
* which otherwise defaults to +nil+. For examples, see
|
|
* <code>Kernel::catch</code>.
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_throw(int argc, VALUE *argv)
|
|
{
|
|
VALUE tag, value;
|
|
|
|
rb_scan_args(argc, argv, "11", &tag, &value);
|
|
rb_throw_obj(tag, value);
|
|
UNREACHABLE;
|
|
}
|
|
|
|
void
|
|
rb_throw_obj(VALUE tag, VALUE value)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
struct rb_vm_tag *tt = th->tag;
|
|
|
|
while (tt) {
|
|
if (tt->tag == tag) {
|
|
tt->retval = value;
|
|
break;
|
|
}
|
|
tt = tt->prev;
|
|
}
|
|
if (!tt) {
|
|
VALUE desc[3];
|
|
desc[0] = tag;
|
|
desc[1] = value;
|
|
desc[2] = rb_str_new_cstr("uncaught throw %p");
|
|
rb_exc_raise(rb_class_new_instance(numberof(desc), desc, rb_eUncaughtThrow));
|
|
}
|
|
|
|
th->errinfo = (VALUE)THROW_DATA_NEW(tag, NULL, TAG_THROW);
|
|
TH_JUMP_TAG(th, TAG_THROW);
|
|
}
|
|
|
|
void
|
|
rb_throw(const char *tag, VALUE val)
|
|
{
|
|
rb_throw_obj(rb_sym_intern_ascii_cstr(tag), val);
|
|
}
|
|
|
|
static VALUE
|
|
catch_i(VALUE tag, VALUE data)
|
|
{
|
|
return rb_yield_0(1, &tag);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* catch([tag]) {|tag| block } -> obj
|
|
*
|
|
* +catch+ executes its block. If +throw+ is not called, the block executes
|
|
* normally, and +catch+ returns the value of the last expression evaluated.
|
|
*
|
|
* catch(1) { 123 } # => 123
|
|
*
|
|
* If <code>throw(tag2, val)</code> is called, Ruby searches up its stack for
|
|
* a +catch+ block whose +tag+ has the same +object_id+ as _tag2_. When found,
|
|
* the block stops executing and returns _val_ (or +nil+ if no second argument
|
|
* was given to +throw+).
|
|
*
|
|
* catch(1) { throw(1, 456) } # => 456
|
|
* catch(1) { throw(1) } # => nil
|
|
*
|
|
* When +tag+ is passed as the first argument, +catch+ yields it as the
|
|
* parameter of the block.
|
|
*
|
|
* catch(1) {|x| x + 2 } # => 3
|
|
*
|
|
* When no +tag+ is given, +catch+ yields a new unique object (as from
|
|
* +Object.new+) as the block parameter. This object can then be used as the
|
|
* argument to +throw+, and will match the correct +catch+ block.
|
|
*
|
|
* catch do |obj_A|
|
|
* catch do |obj_B|
|
|
* throw(obj_B, 123)
|
|
* puts "This puts is not reached"
|
|
* end
|
|
*
|
|
* puts "This puts is displayed"
|
|
* 456
|
|
* end
|
|
*
|
|
* # => 456
|
|
*
|
|
* catch do |obj_A|
|
|
* catch do |obj_B|
|
|
* throw(obj_A, 123)
|
|
* puts "This puts is still not reached"
|
|
* end
|
|
*
|
|
* puts "Now this puts is also not reached"
|
|
* 456
|
|
* end
|
|
*
|
|
* # => 123
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_catch(int argc, VALUE *argv)
|
|
{
|
|
VALUE tag;
|
|
|
|
if (argc == 0) {
|
|
tag = rb_obj_alloc(rb_cObject);
|
|
}
|
|
else {
|
|
rb_scan_args(argc, argv, "01", &tag);
|
|
}
|
|
return rb_catch_obj(tag, catch_i, 0);
|
|
}
|
|
|
|
VALUE
|
|
rb_catch(const char *tag, VALUE (*func)(), VALUE data)
|
|
{
|
|
VALUE vtag = tag ? rb_sym_intern_ascii_cstr(tag) : rb_obj_alloc(rb_cObject);
|
|
return rb_catch_obj(vtag, func, data);
|
|
}
|
|
|
|
static VALUE vm_catch_protect(VALUE, rb_block_call_func *, VALUE, int *, rb_thread_t *volatile);
|
|
|
|
VALUE
|
|
rb_catch_obj(VALUE t, VALUE (*func)(), VALUE data)
|
|
{
|
|
int state;
|
|
rb_thread_t *th = GET_THREAD();
|
|
VALUE val = vm_catch_protect(t, (rb_block_call_func *)func, data, &state, th);
|
|
if (state)
|
|
TH_JUMP_TAG(th, state);
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_catch_protect(VALUE t, rb_block_call_func *func, VALUE data, int *stateptr)
|
|
{
|
|
return vm_catch_protect(t, func, data, stateptr, GET_THREAD());
|
|
}
|
|
|
|
static VALUE
|
|
vm_catch_protect(VALUE tag, rb_block_call_func *func, VALUE data,
|
|
int *stateptr, rb_thread_t *volatile th)
|
|
{
|
|
int state;
|
|
VALUE val = Qnil; /* OK */
|
|
rb_control_frame_t *volatile saved_cfp = th->cfp;
|
|
|
|
TH_PUSH_TAG(th);
|
|
|
|
_tag.tag = tag;
|
|
|
|
if ((state = TH_EXEC_TAG()) == 0) {
|
|
/* call with argc=1, argv = [tag], block = Qnil to insure compatibility */
|
|
val = (*func)(tag, data, 1, (const VALUE *)&tag, Qnil);
|
|
}
|
|
else if (state == TAG_THROW && THROW_DATA_VAL((struct vm_throw_data *)th->errinfo) == tag) {
|
|
rb_vm_rewind_cfp(th, saved_cfp);
|
|
val = th->tag->retval;
|
|
th->errinfo = Qnil;
|
|
state = 0;
|
|
}
|
|
TH_POP_TAG();
|
|
if (stateptr)
|
|
*stateptr = state;
|
|
|
|
return val;
|
|
}
|
|
|
|
static void
|
|
local_var_list_init(struct local_var_list *vars)
|
|
{
|
|
vars->tbl = rb_hash_new();
|
|
RHASH(vars->tbl)->ntbl = st_init_numtable(); /* compare_by_identity */
|
|
RBASIC_CLEAR_CLASS(vars->tbl);
|
|
}
|
|
|
|
static VALUE
|
|
local_var_list_finish(struct local_var_list *vars)
|
|
{
|
|
/* TODO: not to depend on the order of st_table */
|
|
VALUE ary = rb_hash_keys(vars->tbl);
|
|
rb_hash_clear(vars->tbl);
|
|
vars->tbl = 0;
|
|
return ary;
|
|
}
|
|
|
|
static int
|
|
local_var_list_update(st_data_t *key, st_data_t *value, st_data_t arg, int existing)
|
|
{
|
|
if (existing) return ST_STOP;
|
|
*value = (st_data_t)Qtrue; /* INT2FIX(arg) */
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static void
|
|
local_var_list_add(const struct local_var_list *vars, ID lid)
|
|
{
|
|
if (lid && rb_is_local_id(lid)) {
|
|
/* should skip temporary variable */
|
|
st_table *tbl = RHASH_TBL_RAW(vars->tbl);
|
|
st_data_t idx = 0; /* tbl->num_entries */
|
|
st_update(tbl, ID2SYM(lid), local_var_list_update, idx);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* local_variables -> array
|
|
*
|
|
* Returns the names of the current local variables.
|
|
*
|
|
* fred = 1
|
|
* for i in 1..10
|
|
* # ...
|
|
* end
|
|
* local_variables #=> [:fred, :i]
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_local_variables(void)
|
|
{
|
|
struct local_var_list vars;
|
|
rb_thread_t *th = GET_THREAD();
|
|
rb_control_frame_t *cfp =
|
|
vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(th->cfp));
|
|
unsigned int i;
|
|
|
|
local_var_list_init(&vars);
|
|
while (cfp) {
|
|
if (cfp->iseq) {
|
|
for (i = 0; i < cfp->iseq->body->local_table_size; i++) {
|
|
local_var_list_add(&vars, cfp->iseq->body->local_table[i]);
|
|
}
|
|
}
|
|
if (!VM_ENV_LOCAL_P(cfp->ep)) {
|
|
/* block */
|
|
const VALUE *ep = VM_CF_PREV_EP(cfp);
|
|
|
|
if (vm_collect_local_variables_in_heap(th, ep, &vars)) {
|
|
break;
|
|
}
|
|
else {
|
|
while (cfp->ep != ep) {
|
|
cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp);
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
break;
|
|
}
|
|
}
|
|
return local_var_list_finish(&vars);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* block_given? -> true or false
|
|
* iterator? -> true or false
|
|
*
|
|
* Returns <code>true</code> if <code>yield</code> would execute a
|
|
* block in the current context. The <code>iterator?</code> form
|
|
* is mildly deprecated.
|
|
*
|
|
* def try
|
|
* if block_given?
|
|
* yield
|
|
* else
|
|
* "no block"
|
|
* end
|
|
* end
|
|
* try #=> "no block"
|
|
* try { "hello" } #=> "hello"
|
|
* try do "hello" end #=> "hello"
|
|
*/
|
|
|
|
|
|
VALUE
|
|
rb_f_block_given_p(void)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
rb_control_frame_t *cfp = th->cfp;
|
|
cfp = vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
|
|
|
|
if (cfp != NULL && VM_CF_BLOCK_HANDLER(cfp) != VM_BLOCK_HANDLER_NONE) {
|
|
return Qtrue;
|
|
}
|
|
else {
|
|
return Qfalse;
|
|
}
|
|
}
|
|
|
|
VALUE
|
|
rb_current_realfilepath(void)
|
|
{
|
|
rb_thread_t *th = GET_THREAD();
|
|
rb_control_frame_t *cfp = th->cfp;
|
|
cfp = vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
|
|
if (cfp != 0) return cfp->iseq->body->location.absolute_path;
|
|
return Qnil;
|
|
}
|
|
|
|
void
|
|
Init_vm_eval(void)
|
|
{
|
|
rb_define_global_function("eval", rb_f_eval, -1);
|
|
rb_define_global_function("local_variables", rb_f_local_variables, 0);
|
|
rb_define_global_function("iterator?", rb_f_block_given_p, 0);
|
|
rb_define_global_function("block_given?", rb_f_block_given_p, 0);
|
|
|
|
rb_define_global_function("catch", rb_f_catch, -1);
|
|
rb_define_global_function("throw", rb_f_throw, -1);
|
|
|
|
rb_define_global_function("loop", rb_f_loop, 0);
|
|
|
|
rb_define_method(rb_cBasicObject, "instance_eval", rb_obj_instance_eval, -1);
|
|
rb_define_method(rb_cBasicObject, "instance_exec", rb_obj_instance_exec, -1);
|
|
rb_define_private_method(rb_cBasicObject, "method_missing", rb_method_missing, -1);
|
|
|
|
#if 1
|
|
rb_add_method(rb_cBasicObject, rb_intern("__send__"),
|
|
VM_METHOD_TYPE_OPTIMIZED, (void *)OPTIMIZED_METHOD_TYPE_SEND, METHOD_VISI_PUBLIC);
|
|
rb_add_method(rb_mKernel, rb_intern("send"),
|
|
VM_METHOD_TYPE_OPTIMIZED, (void *)OPTIMIZED_METHOD_TYPE_SEND, METHOD_VISI_PUBLIC);
|
|
#else
|
|
rb_define_method(rb_cBasicObject, "__send__", rb_f_send, -1);
|
|
rb_define_method(rb_mKernel, "send", rb_f_send, -1);
|
|
#endif
|
|
rb_define_method(rb_mKernel, "public_send", rb_f_public_send, -1);
|
|
|
|
rb_define_method(rb_cModule, "module_exec", rb_mod_module_exec, -1);
|
|
rb_define_method(rb_cModule, "class_exec", rb_mod_module_exec, -1);
|
|
rb_define_method(rb_cModule, "module_eval", rb_mod_module_eval, -1);
|
|
rb_define_method(rb_cModule, "class_eval", rb_mod_module_eval, -1);
|
|
|
|
rb_eUncaughtThrow = rb_define_class("UncaughtThrowError", rb_eArgError);
|
|
rb_define_method(rb_eUncaughtThrow, "initialize", uncaught_throw_init, -1);
|
|
rb_define_method(rb_eUncaughtThrow, "tag", uncaught_throw_tag, 0);
|
|
rb_define_method(rb_eUncaughtThrow, "value", uncaught_throw_value, 0);
|
|
rb_define_method(rb_eUncaughtThrow, "to_s", uncaught_throw_to_s, 0);
|
|
|
|
id_result = rb_intern_const("result");
|
|
id_tag = rb_intern_const("tag");
|
|
id_value = rb_intern_const("value");
|
|
}
|