7a9389330e
gcc/: * gcc.c (default_compilers): Add entry for ".go". * common.opt: Add -static-libgo as a driver option. * doc/install.texi (Configuration): Mention libgo as an option for --enable-shared. Mention go as an option for --enable-languages. * doc/invoke.texi (Overall Options): Mention .go as a file name suffix. Mention go as a -x option. * doc/frontends.texi (G++ and GCC): Mention Go as a supported language. * doc/sourcebuild.texi (Top Level): Mention libgo. * doc/standards.texi (Standards): Add section on Go language. Move references for other languages into their own section. * doc/contrib.texi (Contributors): Mention that I contributed the Go frontend. gcc/testsuite/: * lib/go.exp: New file. * lib/go-dg.exp: New file. * lib/go-torture.exp: New file. * lib/target-supports.exp (check_compile): Match // Go. From-SVN: r167407
50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/* go-assert-interface.c -- interface type assertion for Go.
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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-alloc.h"
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#include "go-assert.h"
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#include "go-panic.h"
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#include "interface.h"
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/* This is called by the compiler to implement a type assertion from
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one interface type to another. This returns the value that should
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go in the first field of the result tuple. The result may be an
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empty or a non-empty interface. */
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const void *
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__go_assert_interface (const struct __go_type_descriptor *lhs_descriptor,
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const struct __go_type_descriptor *rhs_descriptor)
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{
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const struct __go_interface_type *lhs_interface;
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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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/* A type assertion is not permitted with a nil interface. */
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newTypeAssertionError (NULL,
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NULL,
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lhs_descriptor,
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NULL,
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NULL,
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lhs_descriptor->__reflection,
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NULL,
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&panic_arg);
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__go_panic (panic_arg);
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}
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/* A type assertion to an empty interface just returns the object
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descriptor. */
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__go_assert (lhs_descriptor->__code == GO_INTERFACE);
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lhs_interface = (const struct __go_interface_type *) lhs_descriptor;
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if (lhs_interface->__methods.__count == 0)
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return rhs_descriptor;
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return __go_convert_interface_2 (lhs_descriptor, rhs_descriptor, 0);
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}
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