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(alue)f(accessed)i(only)d(b)o(y)h(an)g(lv)n(alue)f(expression)i(that)f (has)164 1508 y(one)d(of)f(the)i(follo)o(wing)c(t)o(yp)q(es:)214 1574 y Fd(\017)20 b Fe(a)14 b(t)o(yp)q(e)g(compatible)e(with)i(the)g (declared)h(t)o(yp)q(e)g(of)e(the)h(ob)r(ject,)214 1639 y Fd(\017)20 b Fe(a)14 b(quali\014ed)f(v)o(ersion)h(of)f(a)h(t)o(yp)q (e)g(compatible)e(with)i(the)g(declared)h(t)o(yp)q(e)g(of)e(the)h(ob)r (ject,)214 1705 y Fd(\017)20 b Fe(a)14 b(t)o(yp)q(e)h(that)f(is)g(the)h (signed)f(or)g(unsigned)h(t)o(yp)q(e)f(corresp)q(onding)h(to)f(the)h (declared)g(t)o(yp)q(e)g(of)f(the)255 1755 y(ob)r(ject,)214 1820 y Fd(\017)20 b Fe(a)13 b(t)o(yp)q(e)h(that)f(is)g(the)h(signed)f (or)h(unsigned)f(t)o(yp)q(e)h(corresp)q(onding)g(to)f(a)g(quali\014ed)g (v)o(ersion)g(of)g(the)255 1870 y(declared)i(t)o(yp)q(e)f(of)g(the)g (ob)r(ject,)214 1936 y Fd(\017)20 b Fe(an)14 b(aggregate)g(or)h(union)e (t)o(yp)q(e)i(that)f(includes)h(one)f(of)g(the)h(aforemen)o(tioned)e(t) o(yp)q(es)i(among)d(its)255 1986 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(t)o(yp)q(e)f(of)g(the)g(lv)n(alue)f(used)i(to)f(store)g(a)g(v)n(alue)f (in)h(the)g(ob)r(ject.)22 b(This)15 b(is)60 2439 y(analogous)e(to)g (the)i(seman)o(tics)e(of)h(a)f(union,)g(except)i(that)f(there)h(is)f (no)g(declared)h(list)e(of)g(p)q(ossible)h(t)o(yp)q(es.)122 2489 y(Tw)o(o)j(additional)f(usages)i(are)g(also)f(addressed)i(in)e (the)h(prop)q(osed)g(c)o(hange.)29 b(First,)18 b(if)f Fc(memcpy)f Fe(or)h Fc(memmove)60 2539 y Fe(is)f(used)h(to)e(cop)o(y)h (a)g(v)n(alue)f(from)g(one)h(ob)r(ject)g(to)g(another,)h(it)e(seems)h (reasonable)h(that)f(the)g(t)o(yp)q(e)h(of)e(the)i(source)60 2589 y(ob)r(ject)g(should)e(b)q(ecome)h(the)g(e\013ectiv)o(e)i(t)o(yp)q (e)e(of)f(the)i(target)f(ob)r(ject.)25 b(Cop)o(ying)14 b(v)n(alues)i(b)q(et)o(w)o(een)h(ob)r(jects)g(using)965 2713 y(1)p eop %%Page: 2 2 2 1 bop 60 -125 a Fe(2)482 b Fb(W)o(G14/N640,)11 b(X3J11/97-003)493 b(Access)17 b(to)c(Ob)r(jects)60 20 y Fe(lv)n(alues)i(with)g(t)o(yp)q 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(for)f(an)g(access)i(to)e(its)h(stored)g(v)n(alue)e(is)i(the)f (declared)i(t)o(yp)q(e)164 589 y(of)d(the)i(ob)r(ject,)h(if)d(it)h(has) g(one.)29 b(If)17 b(a)g(v)n(alue)f(is)h(stored)i(in)o(to)d(an)h(ob)r (ject)h(ha)o(ving)e(no)h(declared)i(t)o(yp)q(e)164 639 y(through)c(an)f(lv)n(alue)g(ha)o(ving)g(a)h(t)o(yp)q(e)g(that)g(is)g (not)g(a)f(c)o(haracter)j(t)o(yp)q(e,)e(then)g(the)h(t)o(yp)q(e)f(of)g (the)g(lv)n(alue)164 688 y(b)q(ecomes)g(the)h(e\013ectiv)o(e)h(t)o(yp)q (e)f(of)f(the)h(ob)r(ject)g(for)f(that)h(access)h(and)e(for)g (subsequen)o(t)i(accesses)h(that)164 738 y(do)12 b(not)g(mo)q(dify)e (the)j(stored)h(v)n(alue.)i(If)c(a)g(v)n(alue)g(is)g(copied)h(in)o(to)f (an)g(ob)r(ject)h(ha)o(ving)e(no)h(declared)i(t)o(yp)q(e)164 788 y(using)d Fc(memcpy)f Fe(or)i Fc(memmove)p Fe(,)e(or)h(is)g(copied) h(as)g(an)f(arra)o(y)g(of)g(c)o(haracter)i(t)o(yp)q(e,)f(then)g(the)g (e\013ectiv)o(e)h(t)o(yp)q(e)164 838 y(of)g(the)h(mo)q(di\014ed)f(ob)r (ject)i(for)e(that)h(access)i(and)d(for)h(subsequen)o(t)h(accesses)i (that)d(do)f(not)h(mo)q(dify)e(the)164 888 y(v)n(alue)i(is)h(the)g (e\013ectiv)o(e)h(t)o(yp)q(e)g(of)e(the)h(ob)r(ject)h(from)d(whic)o(h)i (the)g(v)n(alue)f(is)h(copied,)g(if)f(it)g(has)h(one.)22 b(F)m(or)164 937 y(all)13 b(other)i(accesses)i(to)d(an)g(ob)r(ject)h (ha)o(ving)e(no)h(declared)i(t)o(yp)q(e,)e(the)h(e\013ectiv)o(e)h(t)o (yp)q(e)f(of)e(the)i(ob)r(ject)g(is)164 987 y(simply)d(the)i(t)o(yp)q (e)h(of)e(the)h(lv)n(alue)f(used)i(for)e(the)i(access.)226 1037 y(An)i(ob)r(ject)h(shall)e(ha)o(v)o(e)h(its)g(stored)h(v)n(alue)f (accessed)i(only)d(b)o(y)h(an)g(lv)n(alue)f(expression)i(that)f(has)164 1087 y(one)d(of)f(the)i(follo)o(wing)c(t)o(yp)q(es:)214 1153 y Fd(\017)20 b Fe(a)14 b(t)o(yp)q(e)g(compatible)e(with)i(the)g (e\013ectiv)o(e)i(t)o(yp)q(e)e(of)f(the)i(ob)r(ject,)214 1220 y Fd(\017)20 b Fe(a)14 b(quali\014ed)f(v)o(ersion)h(of)f(a)h(t)o (yp)q(e)g(compatible)e(with)i(the)g(e\013ectiv)o(e)i(t)o(yp)q(e)e(of)f (the)i(ob)r(ject,)214 1286 y Fd(\017)20 b Fe(a)14 b(t)o(yp)q(e)h(that)g (is)f(the)h(signed)f(or)h(unsigned)g(t)o(yp)q(e)f(corresp)q(onding)i (to)e(the)h(e\013ectiv)o(e)h(t)o(yp)q(e)f(of)f(the)255 1336 y(ob)r(ject,)214 1402 y Fd(\017)20 b Fe(a)13 b(t)o(yp)q(e)h(that)f (is)g(the)h(signed)f(or)h(unsigned)f(t)o(yp)q(e)h(corresp)q(onding)g (to)f(a)g(quali\014ed)g(v)o(ersion)g(of)g(the)255 1452 y(e\013ectiv)o(e)i(t)o(yp)q(e)g(of)e(the)i(ob)r(ject,)214 1519 y Fd(\017)20 b Fe(an)14 b(aggregate)g(or)h(union)e(t)o(yp)q(e)i (that)f(includes)h(one)f(of)g(the)h(aforemen)o(tioned)e(t)o(yp)q(es)i (among)d(its)255 1568 y(mem)o(b)q(ers)g(\(including,)f(recursiv)o(ely)m (,)i(a)g(mem)o(b)q(er)e(of)h(a)h(subaggregate)g(or)g(con)o(tained)g (union\),)f(or)214 1635 y Fd(\017)20 b Fe(a)14 b(c)o(haracter)h(t)o(yp) q(e.)p eop %%Trailer end userdict /end-hook known{end-hook}if %%EOF -- Bill Homer Cray Research, Inc. (612) 683-5606 655F Lone Oak Drive homer@cray.com Eagan, MN 55121
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