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https://github.com/golang/go
synced 2024-11-05 15:06:09 -07:00
do not create interfaces containing interfaces
R=r DELTA=16 (14 added, 0 deleted, 2 changed) OCL=27464 CL=27466
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parent
ff73221d6f
commit
4b8c13dc20
@ -310,6 +310,12 @@ func TestInterfaceValue(t *testing.T) {
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assert(v2.Type().String(), "interface { }");
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v3 := v2.(reflect.InterfaceValue).Value();
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assert(v3.Type().String(), "float");
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i3 := v2.Interface();
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if f, ok := i3.(float); !ok {
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a, typ, c := sys.Reflect(i3);
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t.Error("v2.Interface() did not return float, got ", typ);
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}
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}
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func TestFunctionValue(t *testing.T) {
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@ -58,9 +58,12 @@ func (c *commonValue) Addr() Addr {
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func (c *commonValue) Interface() interface {} {
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var i interface {};
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if c.typ.Size() > 8 { // TODO(rsc): how do we know it is 8?
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switch {
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case c.typ.Kind() == InterfaceKind:
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i = *(*interface{})(c.addr);
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case c.typ.Size() > 8: // TODO(rsc): how do we know it is 8?
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i = sys.Unreflect(uint64(uintptr(c.addr)), c.typ.String(), true);
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} else {
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default:
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if uintptr(c.addr) == 0 {
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panicln("reflect: address 0 for", c.typ.String());
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}
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@ -766,6 +766,11 @@ sys·Unreflect(uint64 it, String type, bool indir, Iface ret)
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if(cmpstring(type, emptystring) == 0)
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goto out;
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if(type.len > 10 && mcmp(type.str, (byte*)"interface ", 10) == 0) {
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printf("sys.Unreflect: cannot put %S in interface\n", type);
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throw("sys.Unreflect");
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}
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// if we think the type should be indirect
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// and caller does not, play it safe, return nil.
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sigt = findtype(type, indir);
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