47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
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/* go-check-interface.c -- check an interface type for a conversion
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Copyright 2010 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include "go-panic.h"
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#include "interface.h"
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/* Check that an interface type matches for a conversion to a
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non-interface type. This panics if the types are bad. The actual
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extraction of the object is inlined. */
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void
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__go_check_interface_type (
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const struct __go_type_descriptor *lhs_descriptor,
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const struct __go_type_descriptor *rhs_descriptor,
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const struct __go_type_descriptor *rhs_inter_descriptor)
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{
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if (rhs_descriptor == NULL)
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{
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struct __go_empty_interface panic_arg;
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newTypeAssertionError(NULL, NULL, lhs_descriptor, NULL, NULL,
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lhs_descriptor->__reflection, NULL, &panic_arg);
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__go_panic(panic_arg);
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}
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if (lhs_descriptor != rhs_descriptor
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&& !__go_type_descriptors_equal (lhs_descriptor, rhs_descriptor)
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&& (lhs_descriptor->__code != GO_UNSAFE_POINTER
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|| !__go_is_pointer_type (rhs_descriptor))
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&& (rhs_descriptor->__code != GO_UNSAFE_POINTER
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|| !__go_is_pointer_type (lhs_descriptor)))
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{
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struct __go_empty_interface panic_arg;
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newTypeAssertionError(rhs_inter_descriptor, rhs_descriptor,
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lhs_descriptor,
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rhs_inter_descriptor->__reflection,
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rhs_descriptor->__reflection,
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lhs_descriptor->__reflection,
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NULL, &panic_arg);
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__go_panic(panic_arg);
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}
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}
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