5bfc7db451
Block objects [1] are a C-level syntactic and runtime feature. They are similar to standard C functions, but in addition to executable code they may also contain variable bindings to automatic (stack) or managed (heap) memory. A block can therefore maintain a set of state (data) that it can use to impact behavior when executed. This port is based on Apple's GCC 5646 with some bugfixes from Apple GCC 5666.3. It has some small differences with the support in clang, which remains the recommended compiler. Perhaps the most notable difference is that in GCC that __block is not actually a keyword, but a macro. There will be workaround for this issue in a near future. Other issues can be consulted in the clang documentation [2] For better compatiblity with Apple's GCC and llvm-gcc some related fixes and features from Apple have been included. Support for the non-standard nested functions in GCC is now off by default. No effort was made to update the ObjC support since FreeBSD doesn't carry ObjC in the base system, but some of the code crept in and was more difficult to remove than to adjust. Reference: [1] https://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Blocks/Articles/00_Introduction.html [2] http://clang.llvm.org/compatibility.html#block-variable-initialization Obtained from: Apple GCC 4.2 MFC after: 3 weeks
43 lines
1.7 KiB
C
43 lines
1.7 KiB
C
/* Variables and structures for declaration processing.
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Copyright (C) 1993, 2000, 2002, 2004, 2005 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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/* In grokdeclarator, distinguish syntactic contexts of declarators. */
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enum decl_context
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{ NORMAL, /* Ordinary declaration */
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FUNCDEF, /* Function definition */
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PARM, /* Declaration of parm before function body */
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CATCHPARM, /* Declaration of catch parm */
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FIELD, /* Declaration inside struct or union */
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BITFIELD, /* Likewise but with specified width */
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TYPENAME, /* Typename (inside cast or sizeof) */
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/* APPLE LOCAL blocks 6339747 */
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BLOCKDEF, /* Declaratin of block literal */
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MEMFUNCDEF /* Member function definition */
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};
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/* We need this in here to get the decl_context definition. */
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extern tree grokdeclarator (const cp_declarator *,
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const cp_decl_specifier_seq *,
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enum decl_context, int, tree*);
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/* APPLE LOCAL radar 4721858 */
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extern void emit_instantiate_pending_templates (location_t *);
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/* APPLE LOCAL blocks 6040305 (ce) */
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extern tree grokparms (cp_parameter_declarator *first_parm, tree *parms);
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