gcc/libgo/runtime/reflect.goc

// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package reflect
#include "go-type.h"
#include "interface.h"
#include "runtime.h"
#include "go-panic.h"

func ifaceE2I(inter *Type, e Eface, ret *Iface) {
	const Type *t;
	Eface err;

	if(((uintptr)e.__type_descriptor&reflectFlags) != 0)
		runtime_throw("invalid interface value");
	t = e.__type_descriptor;
	if(t == nil) {
		// explicit conversions require non-nil interface value.
		newTypeAssertionError(nil, nil, inter,
			nil, nil, inter->__reflection,
			nil, &err);
		__go_panic(err);
	}
	ret->__object = e.__object;
	ret->__methods = __go_convert_interface(inter, t);
}