示例#1
0
void f() {
  int &&virr1; // expected-error {{declaration of reference variable 'virr1' requires an initializer}}
  int &&virr2 = 0;
  int &&virr3 = virr2; // expected-error {{rvalue reference to type 'int' cannot bind to lvalue of type 'int'}}
  int i1 = 0;
  int &&virr4 = i1; // expected-error {{rvalue reference to type 'int' cannot bind to lvalue of type 'int'}}
  int &&virr5 = ret_irr();
  int &&virr6 = static_cast<int&&>(i1);
  (void)static_cast<not_int&&>(i1); // expected-error {{types are not compatible}}

  int i2 = over(i1);
  not_int ni1 = over(0);
  int i3 = over(virr2);
  not_int ni2 = over(ret_irr());

  int i4 = over2(i1);
  not_int ni3 = over2(0);

  ilr_c1 vilr1 = i1;
  ilr_c2 vilr2 = i1;

  conv_to_not_int_rvalue cnir;
  not_int &&ni4 = cnir;
  not_int &ni5 = cnir; // expected-error{{non-const lvalue reference to type 'not_int' cannot bind to a value of unrelated type 'conv_to_not_int_rvalue'}}
  not_int &&ni6 = conv_to_not_int_rvalue();

  fun_type &&fun_ref = fun; // works because functions are special
  fun_type &&fun_ref2 = make_fun(); // same
  fun_type &fun_lref = make_fun(); // also special

  try {
  } catch(int&&) { // expected-error {{cannot catch exceptions by rvalue reference}}
  }
}
示例#2
0
BOOLEAN unification_terms ( Term *t1, Term *t2 ) {
  Termlist *args;
  Termlist *this;

  args = NULL;
  this = termlistalloc();
  this->first = t1;
  this->rest = args;
  args = this;
  this = termlistalloc();
  this->first = t2;
  this->rest = args;
  args = this;

  Term *eq;
  Varlist *vl;
  int l;
  int time;

  vl = NULL;
  eq = make_fun("eq",args);
  l = length_term(eq);
  DagCell terms_dag[l];

  term_as_dag_st_aux(eq, terms_dag, 0, &vl);

  time = 1;
  return unification_dag(terms_dag[0].args->val, terms_dag[0].args->rest->val,
			 terms_dag, &time);

}  
示例#3
0
文件: copy.c 项目: Enouk/iErl14
/* Copy a message to the message area. */
Eterm copy_struct_lazy(Process *from, Eterm orig, Uint offs)
{
    Eterm obj;
    Eterm dest;
#ifdef INCREMENTAL
    int alloc_old = 0;
#else
    int total_need = 0;
#endif

    VERBOSE(DEBUG_MESSAGES,
            ("COPY START; %T is sending a message @ 0x%016x\n%T\n",
             from->id, orig, orig));

#ifndef INCREMENTAL
 copy_start:
#endif
    MA_STACK_PUSH(src,orig);
    MA_STACK_PUSH(dst,&dest);
    MA_STACK_PUSH(offset,offs);

    while (ma_src_top > 0) {
        obj = MA_STACK_POP(src);

        /* copy_struct_lazy should never be called with something that
         * do not need to be copied. Within the loop, nothing that do
         * not need copying should be placed in the src-stack.
         */
        ASSERT(!NO_COPY(obj));

        switch (primary_tag(obj)) {
        case TAG_PRIMARY_LIST: {
            Eterm *hp;
            Eterm *objp;

            GlobalAlloc(from,2,hp);
            objp = list_val(obj);

            MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_list(hp));
            MA_STACK_POP(dst);

            /* TODO: Byt ordningen nedan så att CDR pushas först. */

            if (NO_COPY(*objp)) {
                hp[0] = *objp;
#ifdef INCREMENTAL
                if (ptr_within(ptr_val(*objp),inc_fromspc,inc_fromend))
                    INC_STORE(gray,hp,2);
#endif
            } else {
                MA_STACK_PUSH(src,*objp);
                MA_STACK_PUSH(dst,hp);
                MA_STACK_PUSH(offset,0);
            }

            objp++;

            if (NO_COPY(*objp)) {
                hp[1] = *objp;
#ifdef INCREMENTAL
                if (ptr_within(ptr_val(*objp),inc_fromspc,inc_fromend))
                    INC_STORE(gray,hp,2);
#endif
            }
            else {
                MA_STACK_PUSH(src,*objp);
                MA_STACK_PUSH(dst,hp);
                MA_STACK_PUSH(offset,1);
            }
            continue;
        }

        case TAG_PRIMARY_BOXED: {
            Eterm *objp = boxed_val(obj);

            switch (*objp & _TAG_HEADER_MASK) {
            case ARITYVAL_SUBTAG: {
                Uint ari = arityval(*objp);
                Uint i;
                Eterm *hp;
                GlobalAlloc(from,ari + 1,hp);
                /* A GC above might invalidate the value of objp */
                objp = boxed_val(obj);
                MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_tuple(hp));
                MA_STACK_POP(dst);
                *hp = *objp++;
                for (i = 1; i <= ari; i++) {
                    switch (primary_tag(*objp)) {
                    case TAG_PRIMARY_LIST:
                    case TAG_PRIMARY_BOXED:
                        if (NO_COPY(*objp)) {
                            hp[i] = *objp;
#ifdef INCREMENTAL
                            if (ptr_within(ptr_val(*objp),
                                           inc_fromspc,inc_fromend))
                                INC_STORE(gray,hp,BOXED_NEED(hp,*hp));
#endif
                            objp++;
                        } else {
                            MA_STACK_PUSH(src,*objp++);
                            MA_STACK_PUSH(dst,hp);
                            MA_STACK_PUSH(offset,i);
                        }
                        break;
                    default:
                        hp[i] = *objp++;
                    }
                }
                continue;
            }

            case REFC_BINARY_SUBTAG: {
                ProcBin *pb;
                Uint i = thing_arityval(*objp) + 1;
                Eterm *hp;
                GlobalAlloc(from,i,hp);
                /* A GC above might invalidate the value of objp */
                objp = boxed_val(obj);
                MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_binary(hp));
                MA_STACK_POP(dst);
                pb = (ProcBin*) hp;
                while (i--) {
                    *hp++ = *objp++;
                }
                erts_refc_inc(&pb->val->refc, 2);
                pb->next = erts_global_offheap.mso;
                erts_global_offheap.mso = pb;
                erts_global_offheap.overhead += pb->size / sizeof(Eterm);
                continue;
            }

            case FUN_SUBTAG: {
                ErlFunThing *funp = (ErlFunThing*) objp;
                Uint i = thing_arityval(*objp) + 1;
                Uint j = i + 1 + funp->num_free;
                Uint k = i;
                Eterm *hp, *hp_start;
                GlobalAlloc(from,j,hp);
                /* A GC above might invalidate the value of objp */
                objp = boxed_val(obj);
                hp_start = hp;
                MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_fun(hp));
                MA_STACK_POP(dst);
                funp = (ErlFunThing*) hp;
                while (i--) {
                    *hp++ = *objp++;
                }
#ifndef HYBRID // FIND ME!
                funp->next = erts_global_offheap.funs;
                erts_global_offheap.funs = funp;
                erts_refc_inc(&funp->fe->refc, 2);
#endif
                for (i = k; i < j; i++) {
                    switch (primary_tag(*objp)) {
                    case TAG_PRIMARY_LIST:
                    case TAG_PRIMARY_BOXED:
                        if (NO_COPY(*objp)) {
#ifdef INCREMENTAL
                            if (ptr_within(ptr_val(*objp),
                                           inc_fromspc,inc_fromend))
                                INC_STORE(gray,hp,BOXED_NEED(hp,*hp));
#endif
                            *hp++ = *objp++;
                        } else {
                            MA_STACK_PUSH(src,*objp++);
                            MA_STACK_PUSH(dst,hp_start);
                            MA_STACK_PUSH(offset,i);
                            hp++;
                        }
                        break;
                    default:
                        *hp++ = *objp++;
                    }
                }
                continue;
            }

            case EXTERNAL_PID_SUBTAG:
            case EXTERNAL_PORT_SUBTAG:
            case EXTERNAL_REF_SUBTAG: {
                ExternalThing *etp;
                Uint i =  thing_arityval(*objp) + 1;
                Eterm *hp;
                GlobalAlloc(from,i,hp);
                /* A GC above might invalidate the value of objp */
                objp = boxed_val(obj);
                MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_external(hp));
                MA_STACK_POP(dst);
                etp = (ExternalThing*) hp;
                while (i--)  {
                    *hp++ = *objp++;
                }

                etp->next = erts_global_offheap.externals;
                erts_global_offheap.externals = etp;
		erts_refc_inc(&etp->node->refc, 2);
                continue;
            }

            case SUB_BINARY_SUBTAG: {
                ErlSubBin *sb = (ErlSubBin *) objp;
		Eterm *hp;
		Eterm res_binary;
                Eterm real_bin = sb->orig;
                Uint bit_offset = sb->bitoffs;
		Uint bit_size = sb -> bitsize;
		Uint sub_offset = sb->offs;
                size_t size = sb->size;
		Uint extra_bytes;
		Uint real_size;
		Uint sub_binary_heapneed;
		if ((bit_size + bit_offset) > 8) {
		    extra_bytes = 2;
		    sub_binary_heapneed = ERL_SUB_BIN_SIZE;
		} else if ((bit_size + bit_offset) > 0) {
		    extra_bytes = 1;
		    sub_binary_heapneed = ERL_SUB_BIN_SIZE;
		} else {
		    extra_bytes = 0;
		    sub_binary_heapneed = 0;
		}
		
		real_size = size+extra_bytes;
                objp = binary_val(real_bin);
                if (thing_subtag(*objp) == HEAP_BINARY_SUBTAG) {
                    ErlHeapBin *from_bin;
                    ErlHeapBin *to_bin;
                    Uint i = heap_bin_size(real_size);
                    GlobalAlloc(from,i+sub_binary_heapneed,hp);
                    from_bin = (ErlHeapBin *) objp;
                    to_bin = (ErlHeapBin *) hp;
                    to_bin->thing_word = header_heap_bin(real_size);
                    to_bin->size = real_size;
                    sys_memcpy(to_bin->data, ((byte *)from_bin->data) +
                               sub_offset, real_size);
		    res_binary = make_binary(to_bin);
		    hp += i;
                } else {
                    ProcBin *from_bin;
                    ProcBin *to_bin;
                    
                    ASSERT(thing_subtag(*objp) == REFC_BINARY_SUBTAG);
		    from_bin = (ProcBin *) objp;
		    erts_refc_inc(&from_bin->val->refc, 2);
                    GlobalAlloc(from,PROC_BIN_SIZE+sub_binary_heapneed,hp);
                    to_bin = (ProcBin *) hp;
                    to_bin->thing_word = HEADER_PROC_BIN;
                    to_bin->size = real_size;
                    to_bin->val = from_bin->val;
                    to_bin->bytes = from_bin->bytes + sub_offset;
                    to_bin->next = erts_global_offheap.mso;
                    erts_global_offheap.mso = to_bin;
                    erts_global_offheap.overhead += to_bin->size / sizeof(Eterm);
		    res_binary=make_binary(to_bin);
		    hp += PROC_BIN_SIZE;
                }
		if (extra_bytes != 0) {
		    ErlSubBin* res;
		    res = (ErlSubBin *) hp;
		    res->thing_word = HEADER_SUB_BIN;
		    res->size = size;
		    res->bitsize = bit_size;
		    res->bitoffs = bit_offset;
		    res->offs = 0;
		    res->is_writable = 0;
		    res->orig = res_binary;
		    res_binary = make_binary(hp);
		}
		MA_STACK_UPDATE(dst,MA_STACK_POP(offset),res_binary);
		MA_STACK_POP(dst);
                continue;
            }

	    case BIN_MATCHSTATE_SUBTAG:
		erl_exit(ERTS_ABORT_EXIT,
			 "copy_struct_lazy: matchstate term not allowed");

            default: {
                Uint size = thing_arityval(*objp) + 1;
                Eterm *hp;
                GlobalAlloc(from,size,hp);
                /* A GC above might invalidate the value of objp */
                objp = boxed_val(obj);
                MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_boxed(hp));
                MA_STACK_POP(dst);
                while (size--) {
                    *hp++ = *objp++;
                }
                continue;
            }
            }
            continue;
        }

        case TAG_PRIMARY_HEADER:
        ASSERT((obj & _TAG_HEADER_MASK) == ARITYVAL_SUBTAG);
        {
            Eterm *objp = &obj;
            Uint ari = arityval(obj);
            Uint i;
            Eterm *hp;
            GlobalAlloc(from,ari + 1,hp);
            MA_STACK_UPDATE(dst,MA_STACK_POP(offset),make_tuple(hp));
            MA_STACK_POP(dst);
            *hp = *objp++;
            for (i = 1; i <= ari; i++) {
                switch (primary_tag(*objp)) {
                case TAG_PRIMARY_LIST:
                case TAG_PRIMARY_BOXED:
                    if (NO_COPY(*objp)) {
#ifdef INCREMENTAL
                        if (ptr_within(ptr_val(*objp),inc_fromspc,inc_fromend))
                            INC_STORE(gray,hp,ari + 1);
#endif
                        hp[i] = *objp++;
                    } else {
                        MA_STACK_PUSH(src,*objp++);
                        MA_STACK_PUSH(dst,hp);
                        MA_STACK_PUSH(offset,i);
                    }
                    break;
                default:
                    hp[i] = *objp++;
                }
            }
            continue;
        }

        default:
            erl_exit(ERTS_ABORT_EXIT,
		     "%s, line %d: Internal error in copy_struct_lazy: 0x%08x\n",
                     __FILE__, __LINE__,obj);
        }
    }

    VERBOSE(DEBUG_MESSAGES,
            ("Copy allocated @ 0x%08lx:\n%T\n",
             (unsigned long)ptr_val(dest),dest));

    ma_gc_flags &= ~GC_CYCLE_START;

    ASSERT(eq(orig, dest));
    ASSERT(ma_src_top == 0);
    ASSERT(ma_dst_top == 0);
    ASSERT(ma_offset_top == 0);
    return dest;
}
示例#4
0
文件: copy.c 项目: Enouk/iErl14
/*
 *  Copy a structure to a heap.
 */
Eterm
copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
{
    char* hstart;
    Uint hsize;
    Eterm* htop;
    Eterm* hbot;
    Eterm* hp;
    Eterm* objp;
    Eterm* tp;
    Eterm  res;
    Eterm  elem;
    Eterm* tailp;
    Eterm* argp;
    Eterm* const_tuple;
    Eterm hdr;
    int i;
#ifdef DEBUG
    Eterm org_obj = obj;
    Uint org_sz = sz;
#endif

    if (IS_CONST(obj))
	return obj;

    hp = htop = *hpp;
    hbot   = htop + sz;
    hstart = (char *)htop;
    hsize = (char*) hbot - hstart;
    const_tuple = 0;

    /* Copy the object onto the heap */
    switch (primary_tag(obj)) {
    case TAG_PRIMARY_LIST: argp = &res; goto L_copy_list;
    case TAG_PRIMARY_BOXED: argp = &res; goto L_copy_boxed;
    default:
	erl_exit(ERTS_ABORT_EXIT,
		 "%s, line %d: Internal error in copy_struct: 0x%08x\n",
		 __FILE__, __LINE__,obj);
    }

 L_copy:
    while (hp != htop) {
	obj = *hp;

	switch (primary_tag(obj)) {
	case TAG_PRIMARY_IMMED1:
	    hp++;
	    break;
	case TAG_PRIMARY_LIST:
	    objp = list_val(obj);
	    if (in_area(objp,hstart,hsize)) {
		hp++;
		break;
	    }
	    argp = hp++;
	    /* Fall through */

	L_copy_list:
	    tailp = argp;
	    while (is_list(obj)) {
		objp = list_val(obj);
		tp = tailp;
		elem = *objp;
		if (IS_CONST(elem)) {
		    *(hbot-2) = elem;
		    tailp = hbot-1;
		    hbot -= 2;
		}
		else {
		    *htop = elem;
		    tailp = htop+1;
		    htop += 2;
		}
		*tp = make_list(tailp - 1);
		obj = *(objp+1);
	    }
	    switch (primary_tag(obj)) {
	    case TAG_PRIMARY_IMMED1: *tailp = obj; goto L_copy;
	    case TAG_PRIMARY_BOXED: argp = tailp; goto L_copy_boxed;
	    default:
		erl_exit(ERTS_ABORT_EXIT,
			 "%s, line %d: Internal error in copy_struct: 0x%08x\n",
			 __FILE__, __LINE__,obj);
	    }
	    
	case TAG_PRIMARY_BOXED:
	    if (in_area(boxed_val(obj),hstart,hsize)) {
		hp++;
		break;
	    }
	    argp = hp++;

	L_copy_boxed:
	    objp = boxed_val(obj);
	    hdr = *objp;
	    switch (hdr & _TAG_HEADER_MASK) {
	    case ARITYVAL_SUBTAG:
		{
		    int const_flag = 1; /* assume constant tuple */
		    i = arityval(hdr);
		    *argp = make_tuple(htop);
		    tp = htop;	/* tp is pointer to new arity value */
		    *htop++ = *objp++; /* copy arity value */
		    while (i--) {
			elem = *objp++;
			if (!IS_CONST(elem)) {
			    const_flag = 0;
			}
			*htop++ = elem;
		    }
		    if (const_flag) {
			const_tuple = tp; /* this is the latest const_tuple */
		    }
		}
		break;
	    case REFC_BINARY_SUBTAG:
		{
		    ProcBin* pb;

		    pb = (ProcBin *) objp;
		    if (pb->flags) {
			erts_emasculate_writable_binary(pb);
		    }
		    i = thing_arityval(*objp) + 1;
		    hbot -= i;
		    tp = hbot;
		    while (i--)  {
			*tp++ = *objp++;
		    }
		    *argp = make_binary(hbot);
		    pb = (ProcBin*) hbot;
		    erts_refc_inc(&pb->val->refc, 2);
		    pb->next = off_heap->mso;
		    pb->flags = 0;
		    off_heap->mso = pb;
		    off_heap->overhead += pb->size / sizeof(Eterm);
		}
		break;
	    case SUB_BINARY_SUBTAG:
		{
		    ErlSubBin* sb = (ErlSubBin *) objp;
		    Eterm real_bin = sb->orig;
		    Uint bit_offset = sb->bitoffs;
		    Uint bit_size = sb -> bitsize;
		    Uint offset = sb->offs;
		    size_t size = sb->size;
		    Uint extra_bytes;
		    Uint real_size;
		    if ((bit_size + bit_offset) > 8) {
			extra_bytes = 2;
		    } else if ((bit_size + bit_offset) > 0) {
			extra_bytes = 1;
		    } else {
			extra_bytes = 0;
		    } 
		    real_size = size+extra_bytes;
		    objp = binary_val(real_bin);
		    if (thing_subtag(*objp) == HEAP_BINARY_SUBTAG) {
			ErlHeapBin* from = (ErlHeapBin *) objp;
			ErlHeapBin* to;
			i = heap_bin_size(real_size);
			hbot -= i;
			to = (ErlHeapBin *) hbot;
			to->thing_word = header_heap_bin(real_size);
			to->size = real_size;
			sys_memcpy(to->data, ((byte *)from->data)+offset, real_size);
		    } else {
			ProcBin* from = (ProcBin *) objp;
			ProcBin* to;
			
			ASSERT(thing_subtag(*objp) == REFC_BINARY_SUBTAG);
			if (from->flags) {
			    erts_emasculate_writable_binary(from);
			}
			hbot -= PROC_BIN_SIZE;
			to = (ProcBin *) hbot;
			to->thing_word = HEADER_PROC_BIN;
			to->size = real_size;
			to->val = from->val;
			erts_refc_inc(&to->val->refc, 2);
			to->bytes = from->bytes + offset;
			to->next = off_heap->mso;
			to->flags = 0;
			off_heap->mso = to;
			off_heap->overhead += to->size / sizeof(Eterm);
		    }
		    *argp = make_binary(hbot);
		    if (extra_bytes != 0) {
			ErlSubBin* res;
			hbot -= ERL_SUB_BIN_SIZE;
			res = (ErlSubBin *) hbot;
			res->thing_word = HEADER_SUB_BIN;
			res->size = size;
			res->bitsize = bit_size;
			res->bitoffs = bit_offset;
			res->offs = 0;
			res->is_writable = 0;
			res->orig = *argp;
			*argp = make_binary(hbot);
		    }
		    break;
		}
		break;
	    case FUN_SUBTAG:
		{
		    ErlFunThing* funp = (ErlFunThing *) objp;

		    i =  thing_arityval(hdr) + 2 + funp->num_free;
		    tp = htop;
		    while (i--)  {
			*htop++ = *objp++;
		    }
#ifndef HYBRID /* FIND ME! */
		    funp = (ErlFunThing *) tp;
		    funp->next = off_heap->funs;
		    off_heap->funs = funp;
		    erts_refc_inc(&funp->fe->refc, 2);
#endif
		    *argp = make_fun(tp);
		}
		break;
	    case EXTERNAL_PID_SUBTAG:
	    case EXTERNAL_PORT_SUBTAG:
	    case EXTERNAL_REF_SUBTAG:
		{
		  ExternalThing *etp = (ExternalThing *) htop;

		  i =  thing_arityval(hdr) + 1;
		  tp = htop;

		  while (i--)  {
		    *htop++ = *objp++;
		  }

		  etp->next = off_heap->externals;
		  off_heap->externals = etp;
		  erts_refc_inc(&etp->node->refc, 2);

		  *argp = make_external(tp);
		}
		break;
	    case BIN_MATCHSTATE_SUBTAG:
		erl_exit(ERTS_ABORT_EXIT,
			 "copy_struct: matchstate term not allowed");
	    default:
		i = thing_arityval(hdr)+1;
		hbot -= i;
		tp = hbot;
		*argp = make_boxed(hbot);
		while (i--) {
		    *tp++ = *objp++;
		}
	    }
	    break;
	case TAG_PRIMARY_HEADER:
	    if (header_is_thing(obj) || hp == const_tuple) {
		hp += header_arity(obj) + 1;
	    } else {
		hp++;
	    }
	    break;
	}
    }

#ifdef DEBUG
    if (htop != hbot)
	erl_exit(ERTS_ABORT_EXIT,
		 "Internal error in copy_struct() when copying %T:"
		 " htop=%p != hbot=%p (sz=%bpu)\n",
		 org_obj, htop, hbot, org_sz); 
#else
    if (htop > hbot) {
	erl_exit(ERTS_ABORT_EXIT,
		 "Internal error in copy_struct(): htop, hbot overrun\n");
    }
#endif
    *hpp = (Eterm *) (hstart+hsize);
    return res;
}