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/* go-check-interface.c -- check an interface type for a conversion
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. */
#include "runtime.h"
#include "go-panic.h"
#include "go-type.h"
#include "interface.h"
/* Check that an interface type matches for a conversion to a
non-interface type. This panics if the types are bad. The actual
extraction of the object is inlined. */
void
__go_check_interface_type (
const struct __go_type_descriptor *lhs_descriptor,
const struct __go_type_descriptor *rhs_descriptor,
const struct __go_type_descriptor *rhs_inter_descriptor)
{
if (rhs_descriptor == NULL)
{
struct __go_empty_interface panic_arg;
runtime_newTypeAssertionError(NULL, NULL, lhs_descriptor->__reflection,
NULL, &panic_arg);
__go_panic(panic_arg);
}
if (lhs_descriptor != rhs_descriptor
&& !__go_type_descriptors_equal (lhs_descriptor, rhs_descriptor)
&& ((lhs_descriptor->__code & GO_CODE_MASK) != GO_UNSAFE_POINTER
|| !__go_is_pointer_type (rhs_descriptor))
&& ((rhs_descriptor->__code & GO_CODE_MASK) != GO_UNSAFE_POINTER
|| !__go_is_pointer_type (lhs_descriptor)))
{
struct __go_empty_interface panic_arg;
runtime_newTypeAssertionError(rhs_inter_descriptor->__reflection,
rhs_descriptor->__reflection,
lhs_descriptor->__reflection,
NULL, &panic_arg);
__go_panic(panic_arg);
}
}
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