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283 |
jeremybenn |
/* Report error messages, build initializers, and perform
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some front-end optimizations for C++ compiler.
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Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, 2009
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Free Software Foundation, Inc.
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Hacked by Michael Tiemann (tiemann@cygnus.com)
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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 3, 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 COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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/* This file is part of the C++ front end.
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It contains routines to build C++ expressions given their operands,
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including computing the types of the result, C and C++ specific error
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checks, and some optimization. */
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#include "config.h"
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31 |
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#include "system.h"
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32 |
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#include "coretypes.h"
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33 |
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#include "tm.h"
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34 |
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#include "tree.h"
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35 |
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#include "intl.h"
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36 |
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#include "cp-tree.h"
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37 |
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#include "flags.h"
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38 |
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#include "toplev.h"
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39 |
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#include "output.h"
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40 |
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#include "diagnostic.h"
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41 |
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#include "real.h"
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42 |
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43 |
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static tree
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44 |
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process_init_constructor (tree type, tree init);
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45 |
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46 |
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47 |
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/* Print an error message stemming from an attempt to use
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48 |
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BASETYPE as a base class for TYPE. */
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49 |
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50 |
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tree
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51 |
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error_not_base_type (tree basetype, tree type)
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52 |
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{
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53 |
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if (TREE_CODE (basetype) == FUNCTION_DECL)
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54 |
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basetype = DECL_CONTEXT (basetype);
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55 |
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error ("type %qT is not a base type for type %qT", basetype, type);
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56 |
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return error_mark_node;
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57 |
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}
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58 |
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59 |
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tree
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60 |
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binfo_or_else (tree base, tree type)
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61 |
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{
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62 |
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tree binfo = lookup_base (type, base, ba_unique, NULL);
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63 |
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64 |
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if (binfo == error_mark_node)
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65 |
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return NULL_TREE;
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66 |
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else if (!binfo)
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67 |
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error_not_base_type (base, type);
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68 |
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return binfo;
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69 |
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}
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70 |
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71 |
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/* According to ARM $7.1.6, "A `const' object may be initialized, but its
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value may not be changed thereafter. */
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73 |
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74 |
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void
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75 |
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readonly_error (tree arg, readonly_error_kind errstring)
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76 |
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{
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77 |
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78 |
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/* This macro is used to emit diagnostics to ensure that all format
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79 |
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strings are complete sentences, visible to gettext and checked at
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80 |
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compile time. */
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81 |
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82 |
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#define ERROR_FOR_ASSIGNMENT(AS, ASM, IN, DE, ARG) \
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do { \
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84 |
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switch (errstring) \
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{ \
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86 |
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case REK_ASSIGNMENT: \
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error(AS, ARG); \
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break; \
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89 |
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case REK_ASSIGNMENT_ASM: \
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error(ASM, ARG); \
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91 |
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break; \
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92 |
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case REK_INCREMENT: \
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error (IN, ARG); \
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break; \
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95 |
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case REK_DECREMENT: \
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error (DE, ARG); \
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97 |
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break; \
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98 |
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default: \
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99 |
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gcc_unreachable (); \
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100 |
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} \
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101 |
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} while (0)
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102 |
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103 |
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if (TREE_CODE (arg) == COMPONENT_REF)
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{
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105 |
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if (TYPE_READONLY (TREE_TYPE (TREE_OPERAND (arg, 0))))
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106 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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107 |
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"data-member %qD in read-only structure"),
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108 |
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G_("assignment (via 'asm' output) of "
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"data-member %qD in read-only structure"),
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G_("increment of "
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"data-member %qD in read-only structure"),
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G_("decrement of "
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"data-member %qD in read-only structure"),
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TREE_OPERAND (arg, 1));
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115 |
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else
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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117 |
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"read-only data-member %qD"),
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118 |
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G_("assignment (via 'asm' output) of "
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119 |
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"read-only data-member %qD"),
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120 |
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G_("increment of "
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121 |
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"read-only data-member %qD"),
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G_("decrement of "
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"read-only data-member %qD"),
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TREE_OPERAND (arg, 1));
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}
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126 |
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else if (TREE_CODE (arg) == VAR_DECL)
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127 |
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{
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128 |
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if (DECL_LANG_SPECIFIC (arg)
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129 |
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&& DECL_IN_AGGR_P (arg)
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130 |
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&& !TREE_STATIC (arg))
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131 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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132 |
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"constant field %qD"),
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133 |
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G_("assignment (via 'asm' output) of "
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"constant field %qD"),
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135 |
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G_("increment of "
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136 |
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"constant field %qD"),
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137 |
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G_("decrement of "
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138 |
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"constant field %qD"),
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139 |
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arg);
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140 |
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else
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141 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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142 |
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"read-only variable %qD"),
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143 |
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G_("assignment (via 'asm' output) of "
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144 |
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"read-only variable %qD"),
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145 |
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G_("increment of "
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146 |
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"read-only variable %qD"),
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147 |
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G_("decrement of "
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148 |
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"read-only variable %qD"),
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149 |
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arg);
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150 |
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151 |
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}
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152 |
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else if (TREE_CODE (arg) == PARM_DECL)
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153 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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154 |
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"read-only parameter %qD"),
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155 |
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G_("assignment (via 'asm' output) of "
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"read-only parameter %qD"),
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157 |
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G_("increment of "
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"read-only parameter %qD"),
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159 |
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G_("decrement of "
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"read-only parameter %qD"),
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arg);
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162 |
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else if (TREE_CODE (arg) == INDIRECT_REF
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&& TREE_CODE (TREE_TYPE (TREE_OPERAND (arg, 0))) == REFERENCE_TYPE
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&& (TREE_CODE (TREE_OPERAND (arg, 0)) == VAR_DECL
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|| TREE_CODE (TREE_OPERAND (arg, 0)) == PARM_DECL))
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166 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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"read-only reference %qD"),
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168 |
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G_("assignment (via 'asm' output) of "
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"read-only reference %qD"),
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170 |
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G_("increment of "
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"read-only reference %qD"),
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172 |
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G_("decrement of "
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"read-only reference %qD"),
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TREE_OPERAND (arg, 0));
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else if (TREE_CODE (arg) == RESULT_DECL)
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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"read-only named return value %qD"),
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G_("assignment (via 'asm' output) of "
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"read-only named return value %qD"),
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180 |
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G_("increment of "
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181 |
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"read-only named return value %qD"),
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182 |
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G_("decrement of "
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183 |
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"read-only named return value %qD"),
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arg);
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185 |
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else if (TREE_CODE (arg) == FUNCTION_DECL)
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186 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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187 |
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"function %qD"),
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188 |
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G_("assignment (via 'asm' output) of "
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189 |
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"function %qD"),
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190 |
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G_("increment of "
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191 |
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"function %qD"),
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192 |
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G_("decrement of "
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193 |
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"function %qD"),
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arg);
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195 |
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else
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196 |
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ERROR_FOR_ASSIGNMENT (G_("assignment of "
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197 |
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"read-only location %qE"),
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198 |
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G_("assignment (via 'asm' output) of "
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199 |
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"read-only location %qE"),
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200 |
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G_("increment of "
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201 |
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"read-only location %qE"),
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202 |
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G_("decrement of "
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203 |
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"read-only location %qE"),
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204 |
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arg);
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205 |
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}
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206 |
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207 |
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208 |
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/* Structure that holds information about declarations whose type was
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209 |
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incomplete and we could not check whether it was abstract or not. */
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210 |
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211 |
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struct GTY((chain_next ("%h.next"))) pending_abstract_type {
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212 |
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/* Declaration which we are checking for abstractness. It is either
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213 |
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a DECL node, or an IDENTIFIER_NODE if we do not have a full
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214 |
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declaration available. */
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215 |
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tree decl;
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216 |
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217 |
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/* Type which will be checked for abstractness. */
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218 |
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tree type;
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219 |
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220 |
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/* Position of the declaration. This is only needed for IDENTIFIER_NODEs,
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221 |
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because DECLs already carry locus information. */
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222 |
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location_t locus;
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223 |
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224 |
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/* Link to the next element in list. */
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225 |
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struct pending_abstract_type* next;
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226 |
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};
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227 |
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228 |
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229 |
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/* Compute the hash value of the node VAL. This function is used by the
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230 |
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hash table abstract_pending_vars. */
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231 |
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232 |
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static hashval_t
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233 |
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pat_calc_hash (const void* val)
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234 |
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{
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235 |
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const struct pending_abstract_type *pat =
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236 |
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(const struct pending_abstract_type *) val;
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237 |
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return (hashval_t) TYPE_UID (pat->type);
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238 |
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}
|
239 |
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|
240 |
|
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|
241 |
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/* Compare node VAL1 with the type VAL2. This function is used by the
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242 |
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hash table abstract_pending_vars. */
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243 |
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244 |
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static int
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245 |
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pat_compare (const void* val1, const void* val2)
|
246 |
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{
|
247 |
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const struct pending_abstract_type *const pat1 =
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248 |
|
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(const struct pending_abstract_type *) val1;
|
249 |
|
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const_tree const type2 = (const_tree)val2;
|
250 |
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|
251 |
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return (pat1->type == type2);
|
252 |
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}
|
253 |
|
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|
254 |
|
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/* Hash table that maintains pending_abstract_type nodes, for which we still
|
255 |
|
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need to check for type abstractness. The key of the table is the type
|
256 |
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of the declaration. */
|
257 |
|
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static GTY ((param_is (struct pending_abstract_type)))
|
258 |
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htab_t abstract_pending_vars = NULL;
|
259 |
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|
260 |
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261 |
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/* This function is called after TYPE is completed, and will check if there
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262 |
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are pending declarations for which we still need to verify the abstractness
|
263 |
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of TYPE, and emit a diagnostic (through abstract_virtuals_error) if TYPE
|
264 |
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turned out to be incomplete. */
|
265 |
|
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|
266 |
|
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void
|
267 |
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complete_type_check_abstract (tree type)
|
268 |
|
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{
|
269 |
|
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void **slot;
|
270 |
|
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struct pending_abstract_type *pat;
|
271 |
|
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location_t cur_loc = input_location;
|
272 |
|
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|
273 |
|
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gcc_assert (COMPLETE_TYPE_P (type));
|
274 |
|
|
|
275 |
|
|
if (!abstract_pending_vars)
|
276 |
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return;
|
277 |
|
|
|
278 |
|
|
/* Retrieve the list of pending declarations for this type. */
|
279 |
|
|
slot = htab_find_slot_with_hash (abstract_pending_vars, type,
|
280 |
|
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(hashval_t)TYPE_UID (type), NO_INSERT);
|
281 |
|
|
if (!slot)
|
282 |
|
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return;
|
283 |
|
|
pat = (struct pending_abstract_type*)*slot;
|
284 |
|
|
gcc_assert (pat);
|
285 |
|
|
|
286 |
|
|
/* If the type is not abstract, do not do anything. */
|
287 |
|
|
if (CLASSTYPE_PURE_VIRTUALS (type))
|
288 |
|
|
{
|
289 |
|
|
struct pending_abstract_type *prev = 0, *next;
|
290 |
|
|
|
291 |
|
|
/* Reverse the list to emit the errors in top-down order. */
|
292 |
|
|
for (; pat; pat = next)
|
293 |
|
|
{
|
294 |
|
|
next = pat->next;
|
295 |
|
|
pat->next = prev;
|
296 |
|
|
prev = pat;
|
297 |
|
|
}
|
298 |
|
|
pat = prev;
|
299 |
|
|
|
300 |
|
|
/* Go through the list, and call abstract_virtuals_error for each
|
301 |
|
|
element: it will issue a diagnostic if the type is abstract. */
|
302 |
|
|
while (pat)
|
303 |
|
|
{
|
304 |
|
|
gcc_assert (type == pat->type);
|
305 |
|
|
|
306 |
|
|
/* Tweak input_location so that the diagnostic appears at the correct
|
307 |
|
|
location. Notice that this is only needed if the decl is an
|
308 |
|
|
IDENTIFIER_NODE. */
|
309 |
|
|
input_location = pat->locus;
|
310 |
|
|
abstract_virtuals_error (pat->decl, pat->type);
|
311 |
|
|
pat = pat->next;
|
312 |
|
|
}
|
313 |
|
|
}
|
314 |
|
|
|
315 |
|
|
htab_clear_slot (abstract_pending_vars, slot);
|
316 |
|
|
|
317 |
|
|
input_location = cur_loc;
|
318 |
|
|
}
|
319 |
|
|
|
320 |
|
|
|
321 |
|
|
/* If TYPE has abstract virtual functions, issue an error about trying
|
322 |
|
|
to create an object of that type. DECL is the object declared, or
|
323 |
|
|
NULL_TREE if the declaration is unavailable. Returns 1 if an error
|
324 |
|
|
occurred; zero if all was well. */
|
325 |
|
|
|
326 |
|
|
int
|
327 |
|
|
abstract_virtuals_error (tree decl, tree type)
|
328 |
|
|
{
|
329 |
|
|
VEC(tree,gc) *pure;
|
330 |
|
|
|
331 |
|
|
/* This function applies only to classes. Any other entity can never
|
332 |
|
|
be abstract. */
|
333 |
|
|
if (!CLASS_TYPE_P (type))
|
334 |
|
|
return 0;
|
335 |
|
|
type = TYPE_MAIN_VARIANT (type);
|
336 |
|
|
|
337 |
|
|
/* If the type is incomplete, we register it within a hash table,
|
338 |
|
|
so that we can check again once it is completed. This makes sense
|
339 |
|
|
only for objects for which we have a declaration or at least a
|
340 |
|
|
name. */
|
341 |
|
|
if (!COMPLETE_TYPE_P (type))
|
342 |
|
|
{
|
343 |
|
|
void **slot;
|
344 |
|
|
struct pending_abstract_type *pat;
|
345 |
|
|
|
346 |
|
|
gcc_assert (!decl || DECL_P (decl)
|
347 |
|
|
|| TREE_CODE (decl) == IDENTIFIER_NODE);
|
348 |
|
|
|
349 |
|
|
if (!abstract_pending_vars)
|
350 |
|
|
abstract_pending_vars = htab_create_ggc (31, &pat_calc_hash,
|
351 |
|
|
&pat_compare, NULL);
|
352 |
|
|
|
353 |
|
|
slot = htab_find_slot_with_hash (abstract_pending_vars, type,
|
354 |
|
|
(hashval_t)TYPE_UID (type), INSERT);
|
355 |
|
|
|
356 |
|
|
pat = GGC_NEW (struct pending_abstract_type);
|
357 |
|
|
pat->type = type;
|
358 |
|
|
pat->decl = decl;
|
359 |
|
|
pat->locus = ((decl && DECL_P (decl))
|
360 |
|
|
? DECL_SOURCE_LOCATION (decl)
|
361 |
|
|
: input_location);
|
362 |
|
|
|
363 |
|
|
pat->next = (struct pending_abstract_type *) *slot;
|
364 |
|
|
*slot = pat;
|
365 |
|
|
|
366 |
|
|
return 0;
|
367 |
|
|
}
|
368 |
|
|
|
369 |
|
|
if (!TYPE_SIZE (type))
|
370 |
|
|
/* TYPE is being defined, and during that time
|
371 |
|
|
CLASSTYPE_PURE_VIRTUALS holds the inline friends. */
|
372 |
|
|
return 0;
|
373 |
|
|
|
374 |
|
|
pure = CLASSTYPE_PURE_VIRTUALS (type);
|
375 |
|
|
if (!pure)
|
376 |
|
|
return 0;
|
377 |
|
|
|
378 |
|
|
if (decl)
|
379 |
|
|
{
|
380 |
|
|
if (TREE_CODE (decl) == RESULT_DECL)
|
381 |
|
|
return 0;
|
382 |
|
|
|
383 |
|
|
if (TREE_CODE (decl) == VAR_DECL)
|
384 |
|
|
error ("cannot declare variable %q+D to be of abstract "
|
385 |
|
|
"type %qT", decl, type);
|
386 |
|
|
else if (TREE_CODE (decl) == PARM_DECL)
|
387 |
|
|
error ("cannot declare parameter %q+D to be of abstract type %qT",
|
388 |
|
|
decl, type);
|
389 |
|
|
else if (TREE_CODE (decl) == FIELD_DECL)
|
390 |
|
|
error ("cannot declare field %q+D to be of abstract type %qT",
|
391 |
|
|
decl, type);
|
392 |
|
|
else if (TREE_CODE (decl) == FUNCTION_DECL
|
393 |
|
|
&& TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
|
394 |
|
|
error ("invalid abstract return type for member function %q+#D", decl);
|
395 |
|
|
else if (TREE_CODE (decl) == FUNCTION_DECL)
|
396 |
|
|
error ("invalid abstract return type for function %q+#D", decl);
|
397 |
|
|
else if (TREE_CODE (decl) == IDENTIFIER_NODE)
|
398 |
|
|
/* Here we do not have location information. */
|
399 |
|
|
error ("invalid abstract type %qT for %qE", type, decl);
|
400 |
|
|
else
|
401 |
|
|
error ("invalid abstract type for %q+D", decl);
|
402 |
|
|
}
|
403 |
|
|
else
|
404 |
|
|
error ("cannot allocate an object of abstract type %qT", type);
|
405 |
|
|
|
406 |
|
|
/* Only go through this once. */
|
407 |
|
|
if (VEC_length (tree, pure))
|
408 |
|
|
{
|
409 |
|
|
unsigned ix;
|
410 |
|
|
tree fn;
|
411 |
|
|
|
412 |
|
|
inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
|
413 |
|
|
" because the following virtual functions are pure within %qT:",
|
414 |
|
|
type);
|
415 |
|
|
|
416 |
|
|
for (ix = 0; VEC_iterate (tree, pure, ix, fn); ix++)
|
417 |
|
|
inform (input_location, "\t%+#D", fn);
|
418 |
|
|
/* Now truncate the vector. This leaves it non-null, so we know
|
419 |
|
|
there are pure virtuals, but empty so we don't list them out
|
420 |
|
|
again. */
|
421 |
|
|
VEC_truncate (tree, pure, 0);
|
422 |
|
|
}
|
423 |
|
|
else
|
424 |
|
|
inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
|
425 |
|
|
" since type %qT has pure virtual functions",
|
426 |
|
|
type);
|
427 |
|
|
|
428 |
|
|
return 1;
|
429 |
|
|
}
|
430 |
|
|
|
431 |
|
|
/* Print an error message for invalid use of an incomplete type.
|
432 |
|
|
VALUE is the expression that was used (or 0 if that isn't known)
|
433 |
|
|
and TYPE is the type that was invalid. DIAG_KIND indicates the
|
434 |
|
|
type of diagnostic (see diagnostic.def). */
|
435 |
|
|
|
436 |
|
|
void
|
437 |
|
|
cxx_incomplete_type_diagnostic (const_tree value, const_tree type,
|
438 |
|
|
diagnostic_t diag_kind)
|
439 |
|
|
{
|
440 |
|
|
int decl = 0;
|
441 |
|
|
|
442 |
|
|
gcc_assert (diag_kind == DK_WARNING
|
443 |
|
|
|| diag_kind == DK_PEDWARN
|
444 |
|
|
|| diag_kind == DK_ERROR);
|
445 |
|
|
|
446 |
|
|
/* Avoid duplicate error message. */
|
447 |
|
|
if (TREE_CODE (type) == ERROR_MARK)
|
448 |
|
|
return;
|
449 |
|
|
|
450 |
|
|
if (value != 0 && (TREE_CODE (value) == VAR_DECL
|
451 |
|
|
|| TREE_CODE (value) == PARM_DECL
|
452 |
|
|
|| TREE_CODE (value) == FIELD_DECL))
|
453 |
|
|
{
|
454 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
455 |
|
|
"%q+D has incomplete type", value);
|
456 |
|
|
decl = 1;
|
457 |
|
|
}
|
458 |
|
|
retry:
|
459 |
|
|
/* We must print an error message. Be clever about what it says. */
|
460 |
|
|
|
461 |
|
|
switch (TREE_CODE (type))
|
462 |
|
|
{
|
463 |
|
|
case RECORD_TYPE:
|
464 |
|
|
case UNION_TYPE:
|
465 |
|
|
case ENUMERAL_TYPE:
|
466 |
|
|
if (!decl)
|
467 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
468 |
|
|
"invalid use of incomplete type %q#T", type);
|
469 |
|
|
if (!TYPE_TEMPLATE_INFO (type))
|
470 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
471 |
|
|
"forward declaration of %q+#T", type);
|
472 |
|
|
else
|
473 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
474 |
|
|
"declaration of %q+#T", type);
|
475 |
|
|
break;
|
476 |
|
|
|
477 |
|
|
case VOID_TYPE:
|
478 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
479 |
|
|
"invalid use of %qT", type);
|
480 |
|
|
break;
|
481 |
|
|
|
482 |
|
|
case ARRAY_TYPE:
|
483 |
|
|
if (TYPE_DOMAIN (type))
|
484 |
|
|
{
|
485 |
|
|
type = TREE_TYPE (type);
|
486 |
|
|
goto retry;
|
487 |
|
|
}
|
488 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
489 |
|
|
"invalid use of array with unspecified bounds");
|
490 |
|
|
break;
|
491 |
|
|
|
492 |
|
|
case OFFSET_TYPE:
|
493 |
|
|
bad_member:
|
494 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
495 |
|
|
"invalid use of member (did you forget the %<&%> ?)");
|
496 |
|
|
break;
|
497 |
|
|
|
498 |
|
|
case TEMPLATE_TYPE_PARM:
|
499 |
|
|
if (is_auto (type))
|
500 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
501 |
|
|
"invalid use of %<auto%>");
|
502 |
|
|
else
|
503 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
504 |
|
|
"invalid use of template type parameter %qT", type);
|
505 |
|
|
break;
|
506 |
|
|
|
507 |
|
|
case BOUND_TEMPLATE_TEMPLATE_PARM:
|
508 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
509 |
|
|
"invalid use of template template parameter %qT",
|
510 |
|
|
TYPE_NAME (type));
|
511 |
|
|
break;
|
512 |
|
|
|
513 |
|
|
case TYPENAME_TYPE:
|
514 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
515 |
|
|
"invalid use of dependent type %qT", type);
|
516 |
|
|
break;
|
517 |
|
|
|
518 |
|
|
case UNKNOWN_TYPE:
|
519 |
|
|
if (value && TREE_CODE (value) == COMPONENT_REF)
|
520 |
|
|
goto bad_member;
|
521 |
|
|
else if (value && TREE_CODE (value) == ADDR_EXPR)
|
522 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
523 |
|
|
"address of overloaded function with no contextual "
|
524 |
|
|
"type information");
|
525 |
|
|
else if (value && TREE_CODE (value) == OVERLOAD)
|
526 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
527 |
|
|
"overloaded function with no contextual type information");
|
528 |
|
|
else
|
529 |
|
|
emit_diagnostic (diag_kind, input_location, 0,
|
530 |
|
|
"insufficient contextual information to determine type");
|
531 |
|
|
break;
|
532 |
|
|
|
533 |
|
|
default:
|
534 |
|
|
gcc_unreachable ();
|
535 |
|
|
}
|
536 |
|
|
}
|
537 |
|
|
|
538 |
|
|
/* Backward-compatibility interface to incomplete_type_diagnostic;
|
539 |
|
|
required by ../tree.c. */
|
540 |
|
|
#undef cxx_incomplete_type_error
|
541 |
|
|
void
|
542 |
|
|
cxx_incomplete_type_error (const_tree value, const_tree type)
|
543 |
|
|
{
|
544 |
|
|
cxx_incomplete_type_diagnostic (value, type, DK_ERROR);
|
545 |
|
|
}
|
546 |
|
|
|
547 |
|
|
|
548 |
|
|
/* The recursive part of split_nonconstant_init. DEST is an lvalue
|
549 |
|
|
expression to which INIT should be assigned. INIT is a CONSTRUCTOR. */
|
550 |
|
|
|
551 |
|
|
static void
|
552 |
|
|
split_nonconstant_init_1 (tree dest, tree init)
|
553 |
|
|
{
|
554 |
|
|
unsigned HOST_WIDE_INT idx;
|
555 |
|
|
tree field_index, value;
|
556 |
|
|
tree type = TREE_TYPE (dest);
|
557 |
|
|
tree inner_type = NULL;
|
558 |
|
|
bool array_type_p = false;
|
559 |
|
|
|
560 |
|
|
switch (TREE_CODE (type))
|
561 |
|
|
{
|
562 |
|
|
case ARRAY_TYPE:
|
563 |
|
|
inner_type = TREE_TYPE (type);
|
564 |
|
|
array_type_p = true;
|
565 |
|
|
/* FALLTHRU */
|
566 |
|
|
|
567 |
|
|
case RECORD_TYPE:
|
568 |
|
|
case UNION_TYPE:
|
569 |
|
|
case QUAL_UNION_TYPE:
|
570 |
|
|
FOR_EACH_CONSTRUCTOR_ELT (CONSTRUCTOR_ELTS (init), idx,
|
571 |
|
|
field_index, value)
|
572 |
|
|
{
|
573 |
|
|
/* The current implementation of this algorithm assumes that
|
574 |
|
|
the field was set for all the elements. This is usually done
|
575 |
|
|
by process_init_constructor. */
|
576 |
|
|
gcc_assert (field_index);
|
577 |
|
|
|
578 |
|
|
if (!array_type_p)
|
579 |
|
|
inner_type = TREE_TYPE (field_index);
|
580 |
|
|
|
581 |
|
|
if (TREE_CODE (value) == CONSTRUCTOR)
|
582 |
|
|
{
|
583 |
|
|
tree sub;
|
584 |
|
|
|
585 |
|
|
if (array_type_p)
|
586 |
|
|
sub = build4 (ARRAY_REF, inner_type, dest, field_index,
|
587 |
|
|
NULL_TREE, NULL_TREE);
|
588 |
|
|
else
|
589 |
|
|
sub = build3 (COMPONENT_REF, inner_type, dest, field_index,
|
590 |
|
|
NULL_TREE);
|
591 |
|
|
|
592 |
|
|
split_nonconstant_init_1 (sub, value);
|
593 |
|
|
}
|
594 |
|
|
else if (!initializer_constant_valid_p (value, inner_type))
|
595 |
|
|
{
|
596 |
|
|
tree code;
|
597 |
|
|
tree sub;
|
598 |
|
|
|
599 |
|
|
/* FIXME: Ordered removal is O(1) so the whole function is
|
600 |
|
|
worst-case quadratic. This could be fixed using an aside
|
601 |
|
|
bitmap to record which elements must be removed and remove
|
602 |
|
|
them all at the same time. Or by merging
|
603 |
|
|
split_non_constant_init into process_init_constructor_array,
|
604 |
|
|
that is separating constants from non-constants while building
|
605 |
|
|
the vector. */
|
606 |
|
|
VEC_ordered_remove (constructor_elt, CONSTRUCTOR_ELTS (init),
|
607 |
|
|
idx);
|
608 |
|
|
--idx;
|
609 |
|
|
|
610 |
|
|
if (array_type_p)
|
611 |
|
|
sub = build4 (ARRAY_REF, inner_type, dest, field_index,
|
612 |
|
|
NULL_TREE, NULL_TREE);
|
613 |
|
|
else
|
614 |
|
|
sub = build3 (COMPONENT_REF, inner_type, dest, field_index,
|
615 |
|
|
NULL_TREE);
|
616 |
|
|
|
617 |
|
|
code = build2 (INIT_EXPR, inner_type, sub, value);
|
618 |
|
|
code = build_stmt (input_location, EXPR_STMT, code);
|
619 |
|
|
add_stmt (code);
|
620 |
|
|
continue;
|
621 |
|
|
}
|
622 |
|
|
}
|
623 |
|
|
break;
|
624 |
|
|
|
625 |
|
|
case VECTOR_TYPE:
|
626 |
|
|
if (!initializer_constant_valid_p (init, type))
|
627 |
|
|
{
|
628 |
|
|
tree code;
|
629 |
|
|
tree cons = copy_node (init);
|
630 |
|
|
CONSTRUCTOR_ELTS (init) = NULL;
|
631 |
|
|
code = build2 (MODIFY_EXPR, type, dest, cons);
|
632 |
|
|
code = build_stmt (input_location, EXPR_STMT, code);
|
633 |
|
|
add_stmt (code);
|
634 |
|
|
}
|
635 |
|
|
break;
|
636 |
|
|
|
637 |
|
|
default:
|
638 |
|
|
gcc_unreachable ();
|
639 |
|
|
}
|
640 |
|
|
|
641 |
|
|
/* The rest of the initializer is now a constant. */
|
642 |
|
|
TREE_CONSTANT (init) = 1;
|
643 |
|
|
}
|
644 |
|
|
|
645 |
|
|
/* A subroutine of store_init_value. Splits non-constant static
|
646 |
|
|
initializer INIT into a constant part and generates code to
|
647 |
|
|
perform the non-constant part of the initialization to DEST.
|
648 |
|
|
Returns the code for the runtime init. */
|
649 |
|
|
|
650 |
|
|
static tree
|
651 |
|
|
split_nonconstant_init (tree dest, tree init)
|
652 |
|
|
{
|
653 |
|
|
tree code;
|
654 |
|
|
|
655 |
|
|
if (TREE_CODE (init) == CONSTRUCTOR)
|
656 |
|
|
{
|
657 |
|
|
code = push_stmt_list ();
|
658 |
|
|
split_nonconstant_init_1 (dest, init);
|
659 |
|
|
code = pop_stmt_list (code);
|
660 |
|
|
DECL_INITIAL (dest) = init;
|
661 |
|
|
TREE_READONLY (dest) = 0;
|
662 |
|
|
}
|
663 |
|
|
else
|
664 |
|
|
code = build2 (INIT_EXPR, TREE_TYPE (dest), dest, init);
|
665 |
|
|
|
666 |
|
|
return code;
|
667 |
|
|
}
|
668 |
|
|
|
669 |
|
|
/* Perform appropriate conversions on the initial value of a variable,
|
670 |
|
|
store it in the declaration DECL,
|
671 |
|
|
and print any error messages that are appropriate.
|
672 |
|
|
If the init is invalid, store an ERROR_MARK.
|
673 |
|
|
|
674 |
|
|
C++: Note that INIT might be a TREE_LIST, which would mean that it is
|
675 |
|
|
a base class initializer for some aggregate type, hopefully compatible
|
676 |
|
|
with DECL. If INIT is a single element, and DECL is an aggregate
|
677 |
|
|
type, we silently convert INIT into a TREE_LIST, allowing a constructor
|
678 |
|
|
to be called.
|
679 |
|
|
|
680 |
|
|
If INIT is a TREE_LIST and there is no constructor, turn INIT
|
681 |
|
|
into a CONSTRUCTOR and use standard initialization techniques.
|
682 |
|
|
Perhaps a warning should be generated?
|
683 |
|
|
|
684 |
|
|
Returns code to be executed if initialization could not be performed
|
685 |
|
|
for static variable. In that case, caller must emit the code. */
|
686 |
|
|
|
687 |
|
|
tree
|
688 |
|
|
store_init_value (tree decl, tree init, int flags)
|
689 |
|
|
{
|
690 |
|
|
tree value, type;
|
691 |
|
|
|
692 |
|
|
/* If variable's type was invalidly declared, just ignore it. */
|
693 |
|
|
|
694 |
|
|
type = TREE_TYPE (decl);
|
695 |
|
|
if (TREE_CODE (type) == ERROR_MARK)
|
696 |
|
|
return NULL_TREE;
|
697 |
|
|
|
698 |
|
|
if (MAYBE_CLASS_TYPE_P (type))
|
699 |
|
|
{
|
700 |
|
|
gcc_assert (TYPE_HAS_TRIVIAL_INIT_REF (type)
|
701 |
|
|
|| TREE_CODE (init) == CONSTRUCTOR);
|
702 |
|
|
|
703 |
|
|
if (TREE_CODE (init) == TREE_LIST)
|
704 |
|
|
{
|
705 |
|
|
error ("constructor syntax used, but no constructor declared "
|
706 |
|
|
"for type %qT", type);
|
707 |
|
|
init = build_constructor_from_list (init_list_type_node, nreverse (init));
|
708 |
|
|
}
|
709 |
|
|
}
|
710 |
|
|
else if (TREE_CODE (init) == TREE_LIST
|
711 |
|
|
&& TREE_TYPE (init) != unknown_type_node)
|
712 |
|
|
{
|
713 |
|
|
if (TREE_CODE (decl) == RESULT_DECL)
|
714 |
|
|
init = build_x_compound_expr_from_list (init,
|
715 |
|
|
"return value initializer");
|
716 |
|
|
else if (TREE_CODE (init) == TREE_LIST
|
717 |
|
|
&& TREE_CODE (TREE_TYPE (decl)) == ARRAY_TYPE)
|
718 |
|
|
{
|
719 |
|
|
error ("cannot initialize arrays using this syntax");
|
720 |
|
|
return NULL_TREE;
|
721 |
|
|
}
|
722 |
|
|
else
|
723 |
|
|
/* We get here with code like `int a (2);' */
|
724 |
|
|
init = build_x_compound_expr_from_list (init, "initializer");
|
725 |
|
|
}
|
726 |
|
|
|
727 |
|
|
/* End of special C++ code. */
|
728 |
|
|
|
729 |
|
|
/* Digest the specified initializer into an expression. */
|
730 |
|
|
value = digest_init_flags (type, init, flags);
|
731 |
|
|
/* If the initializer is not a constant, fill in DECL_INITIAL with
|
732 |
|
|
the bits that are constant, and then return an expression that
|
733 |
|
|
will perform the dynamic initialization. */
|
734 |
|
|
if (value != error_mark_node
|
735 |
|
|
&& (TREE_SIDE_EFFECTS (value)
|
736 |
|
|
|| ! initializer_constant_valid_p (value, TREE_TYPE (value))))
|
737 |
|
|
return split_nonconstant_init (decl, value);
|
738 |
|
|
/* If the value is a constant, just put it in DECL_INITIAL. If DECL
|
739 |
|
|
is an automatic variable, the middle end will turn this into a
|
740 |
|
|
dynamic initialization later. */
|
741 |
|
|
DECL_INITIAL (decl) = value;
|
742 |
|
|
return NULL_TREE;
|
743 |
|
|
}
|
744 |
|
|
|
745 |
|
|
|
746 |
|
|
/* Give errors about narrowing conversions within { }. */
|
747 |
|
|
|
748 |
|
|
void
|
749 |
|
|
check_narrowing (tree type, tree init)
|
750 |
|
|
{
|
751 |
|
|
tree ftype = unlowered_expr_type (init);
|
752 |
|
|
bool ok = true;
|
753 |
|
|
REAL_VALUE_TYPE d;
|
754 |
|
|
|
755 |
|
|
if (DECL_P (init))
|
756 |
|
|
init = decl_constant_value (init);
|
757 |
|
|
|
758 |
|
|
if (TREE_CODE (type) == INTEGER_TYPE
|
759 |
|
|
&& TREE_CODE (ftype) == REAL_TYPE)
|
760 |
|
|
ok = false;
|
761 |
|
|
else if (INTEGRAL_OR_ENUMERATION_TYPE_P (ftype)
|
762 |
|
|
&& CP_INTEGRAL_TYPE_P (type))
|
763 |
|
|
{
|
764 |
|
|
if (TYPE_PRECISION (type) < TYPE_PRECISION (ftype)
|
765 |
|
|
&& (TREE_CODE (init) != INTEGER_CST
|
766 |
|
|
|| !int_fits_type_p (init, type)))
|
767 |
|
|
ok = false;
|
768 |
|
|
}
|
769 |
|
|
else if (TREE_CODE (ftype) == REAL_TYPE
|
770 |
|
|
&& TREE_CODE (type) == REAL_TYPE)
|
771 |
|
|
{
|
772 |
|
|
if (TYPE_PRECISION (type) < TYPE_PRECISION (ftype))
|
773 |
|
|
{
|
774 |
|
|
if (TREE_CODE (init) == REAL_CST)
|
775 |
|
|
{
|
776 |
|
|
/* Issue 703: Loss of precision is OK as long as the value is
|
777 |
|
|
within the representable range of the new type. */
|
778 |
|
|
REAL_VALUE_TYPE r;
|
779 |
|
|
d = TREE_REAL_CST (init);
|
780 |
|
|
real_convert (&r, TYPE_MODE (type), &d);
|
781 |
|
|
if (real_isinf (&r))
|
782 |
|
|
ok = false;
|
783 |
|
|
}
|
784 |
|
|
else
|
785 |
|
|
ok = false;
|
786 |
|
|
}
|
787 |
|
|
}
|
788 |
|
|
else if (INTEGRAL_OR_ENUMERATION_TYPE_P (ftype)
|
789 |
|
|
&& TREE_CODE (type) == REAL_TYPE)
|
790 |
|
|
{
|
791 |
|
|
ok = false;
|
792 |
|
|
if (TREE_CODE (init) == INTEGER_CST)
|
793 |
|
|
{
|
794 |
|
|
d = real_value_from_int_cst (0, init);
|
795 |
|
|
if (exact_real_truncate (TYPE_MODE (type), &d))
|
796 |
|
|
ok = true;
|
797 |
|
|
}
|
798 |
|
|
}
|
799 |
|
|
|
800 |
|
|
if (!ok)
|
801 |
|
|
permerror (input_location, "narrowing conversion of %qE from %qT to %qT inside { }",
|
802 |
|
|
init, ftype, type);
|
803 |
|
|
}
|
804 |
|
|
|
805 |
|
|
/* Process the initializer INIT for a variable of type TYPE, emitting
|
806 |
|
|
diagnostics for invalid initializers and converting the initializer as
|
807 |
|
|
appropriate.
|
808 |
|
|
|
809 |
|
|
For aggregate types, it assumes that reshape_init has already run, thus the
|
810 |
|
|
initializer will have the right shape (brace elision has been undone).
|
811 |
|
|
|
812 |
|
|
NESTED is true iff we are being called for an element of a CONSTRUCTOR. */
|
813 |
|
|
|
814 |
|
|
static tree
|
815 |
|
|
digest_init_r (tree type, tree init, bool nested, int flags)
|
816 |
|
|
{
|
817 |
|
|
enum tree_code code = TREE_CODE (type);
|
818 |
|
|
|
819 |
|
|
if (error_operand_p (init))
|
820 |
|
|
return error_mark_node;
|
821 |
|
|
|
822 |
|
|
gcc_assert (init);
|
823 |
|
|
|
824 |
|
|
/* We must strip the outermost array type when completing the type,
|
825 |
|
|
because the its bounds might be incomplete at the moment. */
|
826 |
|
|
if (!complete_type_or_else (TREE_CODE (type) == ARRAY_TYPE
|
827 |
|
|
? TREE_TYPE (type) : type, NULL_TREE))
|
828 |
|
|
return error_mark_node;
|
829 |
|
|
|
830 |
|
|
/* Strip NON_LVALUE_EXPRs since we aren't using as an lvalue
|
831 |
|
|
(g++.old-deja/g++.law/casts2.C). */
|
832 |
|
|
if (TREE_CODE (init) == NON_LVALUE_EXPR)
|
833 |
|
|
init = TREE_OPERAND (init, 0);
|
834 |
|
|
|
835 |
|
|
/* Initialization of an array of chars from a string constant. The initializer
|
836 |
|
|
can be optionally enclosed in braces, but reshape_init has already removed
|
837 |
|
|
them if they were present. */
|
838 |
|
|
if (code == ARRAY_TYPE)
|
839 |
|
|
{
|
840 |
|
|
tree typ1 = TYPE_MAIN_VARIANT (TREE_TYPE (type));
|
841 |
|
|
if (char_type_p (typ1)
|
842 |
|
|
/*&& init */
|
843 |
|
|
&& TREE_CODE (init) == STRING_CST)
|
844 |
|
|
{
|
845 |
|
|
tree char_type = TYPE_MAIN_VARIANT (TREE_TYPE (TREE_TYPE (init)));
|
846 |
|
|
|
847 |
|
|
if (TYPE_PRECISION (typ1) == BITS_PER_UNIT)
|
848 |
|
|
{
|
849 |
|
|
if (char_type != char_type_node)
|
850 |
|
|
{
|
851 |
|
|
error ("char-array initialized from wide string");
|
852 |
|
|
return error_mark_node;
|
853 |
|
|
}
|
854 |
|
|
}
|
855 |
|
|
else
|
856 |
|
|
{
|
857 |
|
|
if (char_type == char_type_node)
|
858 |
|
|
{
|
859 |
|
|
error ("int-array initialized from non-wide string");
|
860 |
|
|
return error_mark_node;
|
861 |
|
|
}
|
862 |
|
|
else if (char_type != typ1)
|
863 |
|
|
{
|
864 |
|
|
error ("int-array initialized from incompatible wide string");
|
865 |
|
|
return error_mark_node;
|
866 |
|
|
}
|
867 |
|
|
}
|
868 |
|
|
|
869 |
|
|
TREE_TYPE (init) = type;
|
870 |
|
|
if (TYPE_DOMAIN (type) != 0 && TREE_CONSTANT (TYPE_SIZE (type)))
|
871 |
|
|
{
|
872 |
|
|
int size = TREE_INT_CST_LOW (TYPE_SIZE (type));
|
873 |
|
|
size = (size + BITS_PER_UNIT - 1) / BITS_PER_UNIT;
|
874 |
|
|
/* In C it is ok to subtract 1 from the length of the string
|
875 |
|
|
because it's ok to ignore the terminating null char that is
|
876 |
|
|
counted in the length of the constant, but in C++ this would
|
877 |
|
|
be invalid. */
|
878 |
|
|
if (size < TREE_STRING_LENGTH (init))
|
879 |
|
|
permerror (input_location, "initializer-string for array of chars is too long");
|
880 |
|
|
}
|
881 |
|
|
return init;
|
882 |
|
|
}
|
883 |
|
|
}
|
884 |
|
|
|
885 |
|
|
/* Handle scalar types (including conversions) and references. */
|
886 |
|
|
if ((TREE_CODE (type) != COMPLEX_TYPE
|
887 |
|
|
|| BRACE_ENCLOSED_INITIALIZER_P (init))
|
888 |
|
|
&& (SCALAR_TYPE_P (type) || code == REFERENCE_TYPE))
|
889 |
|
|
{
|
890 |
|
|
tree *exp;
|
891 |
|
|
|
892 |
|
|
if (cxx_dialect != cxx98 && nested)
|
893 |
|
|
check_narrowing (type, init);
|
894 |
|
|
init = convert_for_initialization (0, type, init, flags,
|
895 |
|
|
"initialization", NULL_TREE, 0,
|
896 |
|
|
tf_warning_or_error);
|
897 |
|
|
exp = &init;
|
898 |
|
|
|
899 |
|
|
/* Skip any conversions since we'll be outputting the underlying
|
900 |
|
|
constant. */
|
901 |
|
|
while (CONVERT_EXPR_P (*exp)
|
902 |
|
|
|| TREE_CODE (*exp) == NON_LVALUE_EXPR)
|
903 |
|
|
exp = &TREE_OPERAND (*exp, 0);
|
904 |
|
|
|
905 |
|
|
*exp = cplus_expand_constant (*exp);
|
906 |
|
|
|
907 |
|
|
return init;
|
908 |
|
|
}
|
909 |
|
|
|
910 |
|
|
/* Come here only for aggregates: records, arrays, unions, complex numbers
|
911 |
|
|
and vectors. */
|
912 |
|
|
gcc_assert (TREE_CODE (type) == ARRAY_TYPE
|
913 |
|
|
|| TREE_CODE (type) == VECTOR_TYPE
|
914 |
|
|
|| TREE_CODE (type) == RECORD_TYPE
|
915 |
|
|
|| TREE_CODE (type) == UNION_TYPE
|
916 |
|
|
|| TREE_CODE (type) == COMPLEX_TYPE);
|
917 |
|
|
|
918 |
|
|
if (BRACE_ENCLOSED_INITIALIZER_P (init)
|
919 |
|
|
&& !TYPE_NON_AGGREGATE_CLASS (type))
|
920 |
|
|
return process_init_constructor (type, init);
|
921 |
|
|
else
|
922 |
|
|
{
|
923 |
|
|
if (COMPOUND_LITERAL_P (init) && TREE_CODE (type) == ARRAY_TYPE)
|
924 |
|
|
{
|
925 |
|
|
error ("cannot initialize aggregate of type %qT with "
|
926 |
|
|
"a compound literal", type);
|
927 |
|
|
|
928 |
|
|
return error_mark_node;
|
929 |
|
|
}
|
930 |
|
|
|
931 |
|
|
if (TREE_CODE (type) == ARRAY_TYPE
|
932 |
|
|
&& !BRACE_ENCLOSED_INITIALIZER_P (init))
|
933 |
|
|
{
|
934 |
|
|
/* Allow the result of build_array_copy and of
|
935 |
|
|
build_value_init_noctor. */
|
936 |
|
|
if ((TREE_CODE (init) == TARGET_EXPR
|
937 |
|
|
|| TREE_CODE (init) == CONSTRUCTOR)
|
938 |
|
|
&& (same_type_ignoring_top_level_qualifiers_p
|
939 |
|
|
(type, TREE_TYPE (init))))
|
940 |
|
|
return init;
|
941 |
|
|
|
942 |
|
|
error ("array must be initialized with a brace-enclosed"
|
943 |
|
|
" initializer");
|
944 |
|
|
return error_mark_node;
|
945 |
|
|
}
|
946 |
|
|
|
947 |
|
|
return convert_for_initialization (NULL_TREE, type, init,
|
948 |
|
|
flags,
|
949 |
|
|
"initialization", NULL_TREE, 0,
|
950 |
|
|
tf_warning_or_error);
|
951 |
|
|
}
|
952 |
|
|
}
|
953 |
|
|
|
954 |
|
|
tree
|
955 |
|
|
digest_init (tree type, tree init)
|
956 |
|
|
{
|
957 |
|
|
return digest_init_r (type, init, false, LOOKUP_IMPLICIT);
|
958 |
|
|
}
|
959 |
|
|
|
960 |
|
|
tree
|
961 |
|
|
digest_init_flags (tree type, tree init, int flags)
|
962 |
|
|
{
|
963 |
|
|
return digest_init_r (type, init, false, flags);
|
964 |
|
|
}
|
965 |
|
|
|
966 |
|
|
/* Set of flags used within process_init_constructor to describe the
|
967 |
|
|
initializers. */
|
968 |
|
|
#define PICFLAG_ERRONEOUS 1
|
969 |
|
|
#define PICFLAG_NOT_ALL_CONSTANT 2
|
970 |
|
|
#define PICFLAG_NOT_ALL_SIMPLE 4
|
971 |
|
|
|
972 |
|
|
/* Given an initializer INIT, return the flag (PICFLAG_*) which better
|
973 |
|
|
describe it. */
|
974 |
|
|
|
975 |
|
|
static int
|
976 |
|
|
picflag_from_initializer (tree init)
|
977 |
|
|
{
|
978 |
|
|
if (init == error_mark_node)
|
979 |
|
|
return PICFLAG_ERRONEOUS;
|
980 |
|
|
else if (!TREE_CONSTANT (init))
|
981 |
|
|
return PICFLAG_NOT_ALL_CONSTANT;
|
982 |
|
|
else if (!initializer_constant_valid_p (init, TREE_TYPE (init)))
|
983 |
|
|
return PICFLAG_NOT_ALL_SIMPLE;
|
984 |
|
|
return 0;
|
985 |
|
|
}
|
986 |
|
|
|
987 |
|
|
/* Subroutine of process_init_constructor, which will process an initializer
|
988 |
|
|
INIT for an array or vector of type TYPE. Returns the flags (PICFLAG_*)
|
989 |
|
|
which describe the initializers. */
|
990 |
|
|
|
991 |
|
|
static int
|
992 |
|
|
process_init_constructor_array (tree type, tree init)
|
993 |
|
|
{
|
994 |
|
|
unsigned HOST_WIDE_INT i, len = 0;
|
995 |
|
|
int flags = 0;
|
996 |
|
|
bool unbounded = false;
|
997 |
|
|
constructor_elt *ce;
|
998 |
|
|
VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (init);
|
999 |
|
|
|
1000 |
|
|
gcc_assert (TREE_CODE (type) == ARRAY_TYPE
|
1001 |
|
|
|| TREE_CODE (type) == VECTOR_TYPE);
|
1002 |
|
|
|
1003 |
|
|
if (TREE_CODE (type) == ARRAY_TYPE)
|
1004 |
|
|
{
|
1005 |
|
|
tree domain = TYPE_DOMAIN (type);
|
1006 |
|
|
if (domain)
|
1007 |
|
|
len = (TREE_INT_CST_LOW (TYPE_MAX_VALUE (domain))
|
1008 |
|
|
- TREE_INT_CST_LOW (TYPE_MIN_VALUE (domain))
|
1009 |
|
|
+ 1);
|
1010 |
|
|
else
|
1011 |
|
|
unbounded = true; /* Take as many as there are. */
|
1012 |
|
|
}
|
1013 |
|
|
else
|
1014 |
|
|
/* Vectors are like simple fixed-size arrays. */
|
1015 |
|
|
len = TYPE_VECTOR_SUBPARTS (type);
|
1016 |
|
|
|
1017 |
|
|
/* There must not be more initializers than needed. */
|
1018 |
|
|
if (!unbounded && VEC_length (constructor_elt, v) > len)
|
1019 |
|
|
error ("too many initializers for %qT", type);
|
1020 |
|
|
|
1021 |
|
|
for (i = 0; VEC_iterate (constructor_elt, v, i, ce); ++i)
|
1022 |
|
|
{
|
1023 |
|
|
if (ce->index)
|
1024 |
|
|
{
|
1025 |
|
|
gcc_assert (TREE_CODE (ce->index) == INTEGER_CST);
|
1026 |
|
|
if (compare_tree_int (ce->index, i) != 0)
|
1027 |
|
|
{
|
1028 |
|
|
ce->value = error_mark_node;
|
1029 |
|
|
sorry ("non-trivial designated initializers not supported");
|
1030 |
|
|
}
|
1031 |
|
|
}
|
1032 |
|
|
else
|
1033 |
|
|
ce->index = size_int (i);
|
1034 |
|
|
gcc_assert (ce->value);
|
1035 |
|
|
ce->value = digest_init_r (TREE_TYPE (type), ce->value, true, LOOKUP_IMPLICIT);
|
1036 |
|
|
|
1037 |
|
|
if (ce->value != error_mark_node)
|
1038 |
|
|
gcc_assert (same_type_ignoring_top_level_qualifiers_p
|
1039 |
|
|
(TREE_TYPE (type), TREE_TYPE (ce->value)));
|
1040 |
|
|
|
1041 |
|
|
flags |= picflag_from_initializer (ce->value);
|
1042 |
|
|
}
|
1043 |
|
|
|
1044 |
|
|
/* No more initializers. If the array is unbounded, we are done. Otherwise,
|
1045 |
|
|
we must add initializers ourselves. */
|
1046 |
|
|
if (!unbounded)
|
1047 |
|
|
for (; i < len; ++i)
|
1048 |
|
|
{
|
1049 |
|
|
tree next;
|
1050 |
|
|
|
1051 |
|
|
if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (type)))
|
1052 |
|
|
{
|
1053 |
|
|
/* If this type needs constructors run for default-initialization,
|
1054 |
|
|
we can't rely on the back end to do it for us, so build up
|
1055 |
|
|
TARGET_EXPRs. If the type in question is a class, just build
|
1056 |
|
|
one up; if it's an array, recurse. */
|
1057 |
|
|
if (MAYBE_CLASS_TYPE_P (TREE_TYPE (type)))
|
1058 |
|
|
next = build_functional_cast (TREE_TYPE (type), NULL_TREE,
|
1059 |
|
|
tf_warning_or_error);
|
1060 |
|
|
else
|
1061 |
|
|
next = build_constructor (init_list_type_node, NULL);
|
1062 |
|
|
next = digest_init (TREE_TYPE (type), next);
|
1063 |
|
|
}
|
1064 |
|
|
else if (!zero_init_p (TREE_TYPE (type)))
|
1065 |
|
|
next = build_zero_init (TREE_TYPE (type),
|
1066 |
|
|
/*nelts=*/NULL_TREE,
|
1067 |
|
|
/*static_storage_p=*/false);
|
1068 |
|
|
else
|
1069 |
|
|
/* The default zero-initialization is fine for us; don't
|
1070 |
|
|
add anything to the CONSTRUCTOR. */
|
1071 |
|
|
break;
|
1072 |
|
|
|
1073 |
|
|
flags |= picflag_from_initializer (next);
|
1074 |
|
|
CONSTRUCTOR_APPEND_ELT (v, size_int (i), next);
|
1075 |
|
|
}
|
1076 |
|
|
|
1077 |
|
|
CONSTRUCTOR_ELTS (init) = v;
|
1078 |
|
|
return flags;
|
1079 |
|
|
}
|
1080 |
|
|
|
1081 |
|
|
/* Subroutine of process_init_constructor, which will process an initializer
|
1082 |
|
|
INIT for a class of type TYPE. Returns the flags (PICFLAG_*) which describe
|
1083 |
|
|
the initializers. */
|
1084 |
|
|
|
1085 |
|
|
static int
|
1086 |
|
|
process_init_constructor_record (tree type, tree init)
|
1087 |
|
|
{
|
1088 |
|
|
VEC(constructor_elt,gc) *v = NULL;
|
1089 |
|
|
int flags = 0;
|
1090 |
|
|
tree field;
|
1091 |
|
|
unsigned HOST_WIDE_INT idx = 0;
|
1092 |
|
|
|
1093 |
|
|
gcc_assert (TREE_CODE (type) == RECORD_TYPE);
|
1094 |
|
|
gcc_assert (!CLASSTYPE_VBASECLASSES (type));
|
1095 |
|
|
gcc_assert (!TYPE_BINFO (type)
|
1096 |
|
|
|| !BINFO_N_BASE_BINFOS (TYPE_BINFO (type)));
|
1097 |
|
|
gcc_assert (!TYPE_POLYMORPHIC_P (type));
|
1098 |
|
|
|
1099 |
|
|
/* Generally, we will always have an index for each initializer (which is
|
1100 |
|
|
a FIELD_DECL, put by reshape_init), but compound literals don't go trough
|
1101 |
|
|
reshape_init. So we need to handle both cases. */
|
1102 |
|
|
for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
|
1103 |
|
|
{
|
1104 |
|
|
tree next;
|
1105 |
|
|
tree type;
|
1106 |
|
|
|
1107 |
|
|
if (!DECL_NAME (field) && DECL_C_BIT_FIELD (field))
|
1108 |
|
|
{
|
1109 |
|
|
flags |= picflag_from_initializer (integer_zero_node);
|
1110 |
|
|
CONSTRUCTOR_APPEND_ELT (v, field, integer_zero_node);
|
1111 |
|
|
continue;
|
1112 |
|
|
}
|
1113 |
|
|
|
1114 |
|
|
if (TREE_CODE (field) != FIELD_DECL || DECL_ARTIFICIAL (field))
|
1115 |
|
|
continue;
|
1116 |
|
|
|
1117 |
|
|
/* If this is a bitfield, first convert to the declared type. */
|
1118 |
|
|
type = TREE_TYPE (field);
|
1119 |
|
|
if (DECL_BIT_FIELD_TYPE (field))
|
1120 |
|
|
type = DECL_BIT_FIELD_TYPE (field);
|
1121 |
|
|
|
1122 |
|
|
if (idx < VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)))
|
1123 |
|
|
{
|
1124 |
|
|
constructor_elt *ce = VEC_index (constructor_elt,
|
1125 |
|
|
CONSTRUCTOR_ELTS (init), idx);
|
1126 |
|
|
if (ce->index)
|
1127 |
|
|
{
|
1128 |
|
|
/* We can have either a FIELD_DECL or an IDENTIFIER_NODE. The
|
1129 |
|
|
latter case can happen in templates where lookup has to be
|
1130 |
|
|
deferred. */
|
1131 |
|
|
gcc_assert (TREE_CODE (ce->index) == FIELD_DECL
|
1132 |
|
|
|| TREE_CODE (ce->index) == IDENTIFIER_NODE);
|
1133 |
|
|
if (ce->index != field
|
1134 |
|
|
&& ce->index != DECL_NAME (field))
|
1135 |
|
|
{
|
1136 |
|
|
ce->value = error_mark_node;
|
1137 |
|
|
sorry ("non-trivial designated initializers not supported");
|
1138 |
|
|
}
|
1139 |
|
|
}
|
1140 |
|
|
|
1141 |
|
|
gcc_assert (ce->value);
|
1142 |
|
|
next = digest_init_r (type, ce->value, true, LOOKUP_IMPLICIT);
|
1143 |
|
|
++idx;
|
1144 |
|
|
}
|
1145 |
|
|
else if (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (field)))
|
1146 |
|
|
{
|
1147 |
|
|
/* If this type needs constructors run for
|
1148 |
|
|
default-initialization, we can't rely on the back end to do it
|
1149 |
|
|
for us, so build up TARGET_EXPRs. If the type in question is
|
1150 |
|
|
a class, just build one up; if it's an array, recurse. */
|
1151 |
|
|
if (MAYBE_CLASS_TYPE_P (TREE_TYPE (field)))
|
1152 |
|
|
next = build_functional_cast (TREE_TYPE (field), NULL_TREE,
|
1153 |
|
|
tf_warning_or_error);
|
1154 |
|
|
else
|
1155 |
|
|
next = build_constructor (init_list_type_node, NULL);
|
1156 |
|
|
|
1157 |
|
|
next = digest_init_r (TREE_TYPE (field), next, true, LOOKUP_IMPLICIT);
|
1158 |
|
|
|
1159 |
|
|
/* Warn when some struct elements are implicitly initialized. */
|
1160 |
|
|
warning (OPT_Wmissing_field_initializers,
|
1161 |
|
|
"missing initializer for member %qD", field);
|
1162 |
|
|
}
|
1163 |
|
|
else
|
1164 |
|
|
{
|
1165 |
|
|
if (TREE_READONLY (field))
|
1166 |
|
|
error ("uninitialized const member %qD", field);
|
1167 |
|
|
else if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (TREE_TYPE (field)))
|
1168 |
|
|
error ("member %qD with uninitialized const fields", field);
|
1169 |
|
|
else if (TREE_CODE (TREE_TYPE (field)) == REFERENCE_TYPE)
|
1170 |
|
|
error ("member %qD is uninitialized reference", field);
|
1171 |
|
|
|
1172 |
|
|
/* Warn when some struct elements are implicitly initialized
|
1173 |
|
|
to zero. */
|
1174 |
|
|
warning (OPT_Wmissing_field_initializers,
|
1175 |
|
|
"missing initializer for member %qD", field);
|
1176 |
|
|
|
1177 |
|
|
if (!zero_init_p (TREE_TYPE (field)))
|
1178 |
|
|
next = build_zero_init (TREE_TYPE (field), /*nelts=*/NULL_TREE,
|
1179 |
|
|
/*static_storage_p=*/false);
|
1180 |
|
|
else
|
1181 |
|
|
/* The default zero-initialization is fine for us; don't
|
1182 |
|
|
add anything to the CONSTRUCTOR. */
|
1183 |
|
|
continue;
|
1184 |
|
|
}
|
1185 |
|
|
|
1186 |
|
|
/* If this is a bitfield, now convert to the lowered type. */
|
1187 |
|
|
if (type != TREE_TYPE (field))
|
1188 |
|
|
next = cp_convert_and_check (TREE_TYPE (field), next);
|
1189 |
|
|
flags |= picflag_from_initializer (next);
|
1190 |
|
|
CONSTRUCTOR_APPEND_ELT (v, field, next);
|
1191 |
|
|
}
|
1192 |
|
|
|
1193 |
|
|
if (idx < VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init)))
|
1194 |
|
|
error ("too many initializers for %qT", type);
|
1195 |
|
|
|
1196 |
|
|
CONSTRUCTOR_ELTS (init) = v;
|
1197 |
|
|
return flags;
|
1198 |
|
|
}
|
1199 |
|
|
|
1200 |
|
|
/* Subroutine of process_init_constructor, which will process a single
|
1201 |
|
|
initializer INIT for a union of type TYPE. Returns the flags (PICFLAG_*)
|
1202 |
|
|
which describe the initializer. */
|
1203 |
|
|
|
1204 |
|
|
static int
|
1205 |
|
|
process_init_constructor_union (tree type, tree init)
|
1206 |
|
|
{
|
1207 |
|
|
constructor_elt *ce;
|
1208 |
|
|
int len;
|
1209 |
|
|
|
1210 |
|
|
/* If the initializer was empty, use default zero initialization. */
|
1211 |
|
|
if (VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (init)))
|
1212 |
|
|
return 0;
|
1213 |
|
|
|
1214 |
|
|
len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
|
1215 |
|
|
if (len > 1)
|
1216 |
|
|
{
|
1217 |
|
|
error ("too many initializers for %qT", type);
|
1218 |
|
|
VEC_block_remove (constructor_elt, CONSTRUCTOR_ELTS (init), 1, len-1);
|
1219 |
|
|
}
|
1220 |
|
|
|
1221 |
|
|
ce = VEC_index (constructor_elt, CONSTRUCTOR_ELTS (init), 0);
|
1222 |
|
|
|
1223 |
|
|
/* If this element specifies a field, initialize via that field. */
|
1224 |
|
|
if (ce->index)
|
1225 |
|
|
{
|
1226 |
|
|
if (TREE_CODE (ce->index) == FIELD_DECL)
|
1227 |
|
|
;
|
1228 |
|
|
else if (TREE_CODE (ce->index) == IDENTIFIER_NODE)
|
1229 |
|
|
{
|
1230 |
|
|
/* This can happen within a cast, see g++.dg/opt/cse2.C. */
|
1231 |
|
|
tree name = ce->index;
|
1232 |
|
|
tree field;
|
1233 |
|
|
for (field = TYPE_FIELDS (type); field; field = TREE_CHAIN (field))
|
1234 |
|
|
if (DECL_NAME (field) == name)
|
1235 |
|
|
break;
|
1236 |
|
|
if (!field)
|
1237 |
|
|
{
|
1238 |
|
|
error ("no field %qD found in union being initialized", field);
|
1239 |
|
|
ce->value = error_mark_node;
|
1240 |
|
|
}
|
1241 |
|
|
ce->index = field;
|
1242 |
|
|
}
|
1243 |
|
|
else
|
1244 |
|
|
{
|
1245 |
|
|
gcc_assert (TREE_CODE (ce->index) == INTEGER_CST
|
1246 |
|
|
|| TREE_CODE (ce->index) == RANGE_EXPR);
|
1247 |
|
|
error ("index value instead of field name in union initializer");
|
1248 |
|
|
ce->value = error_mark_node;
|
1249 |
|
|
}
|
1250 |
|
|
}
|
1251 |
|
|
else
|
1252 |
|
|
{
|
1253 |
|
|
/* Find the first named field. ANSI decided in September 1990
|
1254 |
|
|
that only named fields count here. */
|
1255 |
|
|
tree field = TYPE_FIELDS (type);
|
1256 |
|
|
while (field && (!DECL_NAME (field) || TREE_CODE (field) != FIELD_DECL))
|
1257 |
|
|
field = TREE_CHAIN (field);
|
1258 |
|
|
if (field == NULL_TREE)
|
1259 |
|
|
{
|
1260 |
|
|
error ("too many initializers for %qT", type);
|
1261 |
|
|
ce->value = error_mark_node;
|
1262 |
|
|
}
|
1263 |
|
|
ce->index = field;
|
1264 |
|
|
}
|
1265 |
|
|
|
1266 |
|
|
if (ce->value && ce->value != error_mark_node)
|
1267 |
|
|
ce->value = digest_init_r (TREE_TYPE (ce->index), ce->value, true, LOOKUP_IMPLICIT);
|
1268 |
|
|
|
1269 |
|
|
return picflag_from_initializer (ce->value);
|
1270 |
|
|
}
|
1271 |
|
|
|
1272 |
|
|
/* Process INIT, a constructor for a variable of aggregate type TYPE. The
|
1273 |
|
|
constructor is a brace-enclosed initializer, and will be modified in-place.
|
1274 |
|
|
|
1275 |
|
|
Each element is converted to the right type through digest_init, and
|
1276 |
|
|
missing initializers are added following the language rules (zero-padding,
|
1277 |
|
|
etc.).
|
1278 |
|
|
|
1279 |
|
|
After the execution, the initializer will have TREE_CONSTANT if all elts are
|
1280 |
|
|
constant, and TREE_STATIC set if, in addition, all elts are simple enough
|
1281 |
|
|
constants that the assembler and linker can compute them.
|
1282 |
|
|
|
1283 |
|
|
The function returns the initializer itself, or error_mark_node in case
|
1284 |
|
|
of error. */
|
1285 |
|
|
|
1286 |
|
|
static tree
|
1287 |
|
|
process_init_constructor (tree type, tree init)
|
1288 |
|
|
{
|
1289 |
|
|
int flags;
|
1290 |
|
|
|
1291 |
|
|
gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
|
1292 |
|
|
|
1293 |
|
|
if (TREE_CODE (type) == ARRAY_TYPE || TREE_CODE (type) == VECTOR_TYPE)
|
1294 |
|
|
flags = process_init_constructor_array (type, init);
|
1295 |
|
|
else if (TREE_CODE (type) == RECORD_TYPE)
|
1296 |
|
|
flags = process_init_constructor_record (type, init);
|
1297 |
|
|
else if (TREE_CODE (type) == UNION_TYPE)
|
1298 |
|
|
flags = process_init_constructor_union (type, init);
|
1299 |
|
|
else
|
1300 |
|
|
gcc_unreachable ();
|
1301 |
|
|
|
1302 |
|
|
if (flags & PICFLAG_ERRONEOUS)
|
1303 |
|
|
return error_mark_node;
|
1304 |
|
|
|
1305 |
|
|
TREE_TYPE (init) = type;
|
1306 |
|
|
if (TREE_CODE (type) == ARRAY_TYPE && TYPE_DOMAIN (type) == NULL_TREE)
|
1307 |
|
|
cp_complete_array_type (&TREE_TYPE (init), init, /*do_default=*/0);
|
1308 |
|
|
if (!(flags & PICFLAG_NOT_ALL_CONSTANT))
|
1309 |
|
|
{
|
1310 |
|
|
TREE_CONSTANT (init) = 1;
|
1311 |
|
|
if (!(flags & PICFLAG_NOT_ALL_SIMPLE))
|
1312 |
|
|
TREE_STATIC (init) = 1;
|
1313 |
|
|
}
|
1314 |
|
|
return init;
|
1315 |
|
|
}
|
1316 |
|
|
|
1317 |
|
|
/* Given a structure or union value DATUM, construct and return
|
1318 |
|
|
the structure or union component which results from narrowing
|
1319 |
|
|
that value to the base specified in BASETYPE. For example, given the
|
1320 |
|
|
hierarchy
|
1321 |
|
|
|
1322 |
|
|
class L { int ii; };
|
1323 |
|
|
class A : L { ... };
|
1324 |
|
|
class B : L { ... };
|
1325 |
|
|
class C : A, B { ... };
|
1326 |
|
|
|
1327 |
|
|
and the declaration
|
1328 |
|
|
|
1329 |
|
|
C x;
|
1330 |
|
|
|
1331 |
|
|
then the expression
|
1332 |
|
|
|
1333 |
|
|
x.A::ii refers to the ii member of the L part of
|
1334 |
|
|
the A part of the C object named by X. In this case,
|
1335 |
|
|
DATUM would be x, and BASETYPE would be A.
|
1336 |
|
|
|
1337 |
|
|
I used to think that this was nonconformant, that the standard specified
|
1338 |
|
|
that first we look up ii in A, then convert x to an L& and pull out the
|
1339 |
|
|
ii part. But in fact, it does say that we convert x to an A&; A here
|
1340 |
|
|
is known as the "naming class". (jason 2000-12-19)
|
1341 |
|
|
|
1342 |
|
|
BINFO_P points to a variable initialized either to NULL_TREE or to the
|
1343 |
|
|
binfo for the specific base subobject we want to convert to. */
|
1344 |
|
|
|
1345 |
|
|
tree
|
1346 |
|
|
build_scoped_ref (tree datum, tree basetype, tree* binfo_p)
|
1347 |
|
|
{
|
1348 |
|
|
tree binfo;
|
1349 |
|
|
|
1350 |
|
|
if (datum == error_mark_node)
|
1351 |
|
|
return error_mark_node;
|
1352 |
|
|
if (*binfo_p)
|
1353 |
|
|
binfo = *binfo_p;
|
1354 |
|
|
else
|
1355 |
|
|
binfo = lookup_base (TREE_TYPE (datum), basetype, ba_check, NULL);
|
1356 |
|
|
|
1357 |
|
|
if (!binfo || binfo == error_mark_node)
|
1358 |
|
|
{
|
1359 |
|
|
*binfo_p = NULL_TREE;
|
1360 |
|
|
if (!binfo)
|
1361 |
|
|
error_not_base_type (basetype, TREE_TYPE (datum));
|
1362 |
|
|
return error_mark_node;
|
1363 |
|
|
}
|
1364 |
|
|
|
1365 |
|
|
*binfo_p = binfo;
|
1366 |
|
|
return build_base_path (PLUS_EXPR, datum, binfo, 1);
|
1367 |
|
|
}
|
1368 |
|
|
|
1369 |
|
|
/* Build a reference to an object specified by the C++ `->' operator.
|
1370 |
|
|
Usually this just involves dereferencing the object, but if the
|
1371 |
|
|
`->' operator is overloaded, then such overloads must be
|
1372 |
|
|
performed until an object which does not have the `->' operator
|
1373 |
|
|
overloaded is found. An error is reported when circular pointer
|
1374 |
|
|
delegation is detected. */
|
1375 |
|
|
|
1376 |
|
|
tree
|
1377 |
|
|
build_x_arrow (tree expr)
|
1378 |
|
|
{
|
1379 |
|
|
tree orig_expr = expr;
|
1380 |
|
|
tree types_memoized = NULL_TREE;
|
1381 |
|
|
tree type = TREE_TYPE (expr);
|
1382 |
|
|
tree last_rval = NULL_TREE;
|
1383 |
|
|
|
1384 |
|
|
if (type == error_mark_node)
|
1385 |
|
|
return error_mark_node;
|
1386 |
|
|
|
1387 |
|
|
if (processing_template_decl)
|
1388 |
|
|
{
|
1389 |
|
|
if (type_dependent_expression_p (expr))
|
1390 |
|
|
return build_min_nt (ARROW_EXPR, expr);
|
1391 |
|
|
expr = build_non_dependent_expr (expr);
|
1392 |
|
|
}
|
1393 |
|
|
|
1394 |
|
|
if (MAYBE_CLASS_TYPE_P (type))
|
1395 |
|
|
{
|
1396 |
|
|
while ((expr = build_new_op (COMPONENT_REF, LOOKUP_NORMAL, expr,
|
1397 |
|
|
NULL_TREE, NULL_TREE,
|
1398 |
|
|
/*overloaded_p=*/NULL,
|
1399 |
|
|
tf_warning_or_error)))
|
1400 |
|
|
{
|
1401 |
|
|
if (expr == error_mark_node)
|
1402 |
|
|
return error_mark_node;
|
1403 |
|
|
|
1404 |
|
|
if (value_member (TREE_TYPE (expr), types_memoized))
|
1405 |
|
|
{
|
1406 |
|
|
error ("circular pointer delegation detected");
|
1407 |
|
|
return error_mark_node;
|
1408 |
|
|
}
|
1409 |
|
|
else
|
1410 |
|
|
{
|
1411 |
|
|
types_memoized = tree_cons (NULL_TREE, TREE_TYPE (expr),
|
1412 |
|
|
types_memoized);
|
1413 |
|
|
}
|
1414 |
|
|
last_rval = expr;
|
1415 |
|
|
}
|
1416 |
|
|
|
1417 |
|
|
if (last_rval == NULL_TREE)
|
1418 |
|
|
{
|
1419 |
|
|
error ("base operand of %<->%> has non-pointer type %qT", type);
|
1420 |
|
|
return error_mark_node;
|
1421 |
|
|
}
|
1422 |
|
|
|
1423 |
|
|
if (TREE_CODE (TREE_TYPE (last_rval)) == REFERENCE_TYPE)
|
1424 |
|
|
last_rval = convert_from_reference (last_rval);
|
1425 |
|
|
}
|
1426 |
|
|
else
|
1427 |
|
|
last_rval = decay_conversion (expr);
|
1428 |
|
|
|
1429 |
|
|
if (TREE_CODE (TREE_TYPE (last_rval)) == POINTER_TYPE)
|
1430 |
|
|
{
|
1431 |
|
|
if (processing_template_decl)
|
1432 |
|
|
{
|
1433 |
|
|
expr = build_min_non_dep (ARROW_EXPR, last_rval, orig_expr);
|
1434 |
|
|
/* It will be dereferenced. */
|
1435 |
|
|
TREE_TYPE (expr) = TREE_TYPE (TREE_TYPE (last_rval));
|
1436 |
|
|
return expr;
|
1437 |
|
|
}
|
1438 |
|
|
|
1439 |
|
|
return cp_build_indirect_ref (last_rval, RO_NULL, tf_warning_or_error);
|
1440 |
|
|
}
|
1441 |
|
|
|
1442 |
|
|
if (types_memoized)
|
1443 |
|
|
error ("result of %<operator->()%> yields non-pointer result");
|
1444 |
|
|
else
|
1445 |
|
|
error ("base operand of %<->%> is not a pointer");
|
1446 |
|
|
return error_mark_node;
|
1447 |
|
|
}
|
1448 |
|
|
|
1449 |
|
|
/* Return an expression for "DATUM .* COMPONENT". DATUM has not
|
1450 |
|
|
already been checked out to be of aggregate type. */
|
1451 |
|
|
|
1452 |
|
|
tree
|
1453 |
|
|
build_m_component_ref (tree datum, tree component)
|
1454 |
|
|
{
|
1455 |
|
|
tree ptrmem_type;
|
1456 |
|
|
tree objtype;
|
1457 |
|
|
tree type;
|
1458 |
|
|
tree binfo;
|
1459 |
|
|
tree ctype;
|
1460 |
|
|
|
1461 |
|
|
if (error_operand_p (datum) || error_operand_p (component))
|
1462 |
|
|
return error_mark_node;
|
1463 |
|
|
|
1464 |
|
|
ptrmem_type = TREE_TYPE (component);
|
1465 |
|
|
if (!TYPE_PTR_TO_MEMBER_P (ptrmem_type))
|
1466 |
|
|
{
|
1467 |
|
|
error ("%qE cannot be used as a member pointer, since it is of "
|
1468 |
|
|
"type %qT",
|
1469 |
|
|
component, ptrmem_type);
|
1470 |
|
|
return error_mark_node;
|
1471 |
|
|
}
|
1472 |
|
|
|
1473 |
|
|
objtype = TYPE_MAIN_VARIANT (TREE_TYPE (datum));
|
1474 |
|
|
if (! MAYBE_CLASS_TYPE_P (objtype))
|
1475 |
|
|
{
|
1476 |
|
|
error ("cannot apply member pointer %qE to %qE, which is of "
|
1477 |
|
|
"non-class type %qT",
|
1478 |
|
|
component, datum, objtype);
|
1479 |
|
|
return error_mark_node;
|
1480 |
|
|
}
|
1481 |
|
|
|
1482 |
|
|
type = TYPE_PTRMEM_POINTED_TO_TYPE (ptrmem_type);
|
1483 |
|
|
ctype = complete_type (TYPE_PTRMEM_CLASS_TYPE (ptrmem_type));
|
1484 |
|
|
|
1485 |
|
|
if (!COMPLETE_TYPE_P (ctype))
|
1486 |
|
|
{
|
1487 |
|
|
if (!same_type_p (ctype, objtype))
|
1488 |
|
|
goto mismatch;
|
1489 |
|
|
binfo = NULL;
|
1490 |
|
|
}
|
1491 |
|
|
else
|
1492 |
|
|
{
|
1493 |
|
|
binfo = lookup_base (objtype, ctype, ba_check, NULL);
|
1494 |
|
|
|
1495 |
|
|
if (!binfo)
|
1496 |
|
|
{
|
1497 |
|
|
mismatch:
|
1498 |
|
|
error ("pointer to member type %qT incompatible with object "
|
1499 |
|
|
"type %qT",
|
1500 |
|
|
type, objtype);
|
1501 |
|
|
return error_mark_node;
|
1502 |
|
|
}
|
1503 |
|
|
else if (binfo == error_mark_node)
|
1504 |
|
|
return error_mark_node;
|
1505 |
|
|
}
|
1506 |
|
|
|
1507 |
|
|
if (TYPE_PTRMEM_P (ptrmem_type))
|
1508 |
|
|
{
|
1509 |
|
|
tree ptype;
|
1510 |
|
|
|
1511 |
|
|
/* Compute the type of the field, as described in [expr.ref].
|
1512 |
|
|
There's no such thing as a mutable pointer-to-member, so
|
1513 |
|
|
things are not as complex as they are for references to
|
1514 |
|
|
non-static data members. */
|
1515 |
|
|
type = cp_build_qualified_type (type,
|
1516 |
|
|
(cp_type_quals (type)
|
1517 |
|
|
| cp_type_quals (TREE_TYPE (datum))));
|
1518 |
|
|
|
1519 |
|
|
datum = build_address (datum);
|
1520 |
|
|
|
1521 |
|
|
/* Convert object to the correct base. */
|
1522 |
|
|
if (binfo)
|
1523 |
|
|
datum = build_base_path (PLUS_EXPR, datum, binfo, 1);
|
1524 |
|
|
|
1525 |
|
|
/* Build an expression for "object + offset" where offset is the
|
1526 |
|
|
value stored in the pointer-to-data-member. */
|
1527 |
|
|
ptype = build_pointer_type (type);
|
1528 |
|
|
datum = build2 (POINTER_PLUS_EXPR, ptype,
|
1529 |
|
|
fold_convert (ptype, datum),
|
1530 |
|
|
build_nop (sizetype, component));
|
1531 |
|
|
return cp_build_indirect_ref (datum, RO_NULL, tf_warning_or_error);
|
1532 |
|
|
}
|
1533 |
|
|
else
|
1534 |
|
|
return build2 (OFFSET_REF, type, datum, component);
|
1535 |
|
|
}
|
1536 |
|
|
|
1537 |
|
|
/* Return a tree node for the expression TYPENAME '(' PARMS ')'. */
|
1538 |
|
|
|
1539 |
|
|
tree
|
1540 |
|
|
build_functional_cast (tree exp, tree parms, tsubst_flags_t complain)
|
1541 |
|
|
{
|
1542 |
|
|
/* This is either a call to a constructor,
|
1543 |
|
|
or a C cast in C++'s `functional' notation. */
|
1544 |
|
|
|
1545 |
|
|
/* The type to which we are casting. */
|
1546 |
|
|
tree type;
|
1547 |
|
|
VEC(tree,gc) *parmvec;
|
1548 |
|
|
|
1549 |
|
|
if (exp == error_mark_node || parms == error_mark_node)
|
1550 |
|
|
return error_mark_node;
|
1551 |
|
|
|
1552 |
|
|
if (TREE_CODE (exp) == TYPE_DECL)
|
1553 |
|
|
type = TREE_TYPE (exp);
|
1554 |
|
|
else
|
1555 |
|
|
type = exp;
|
1556 |
|
|
|
1557 |
|
|
if (TREE_CODE (type) == REFERENCE_TYPE && !parms)
|
1558 |
|
|
{
|
1559 |
|
|
error ("invalid value-initialization of reference types");
|
1560 |
|
|
return error_mark_node;
|
1561 |
|
|
}
|
1562 |
|
|
|
1563 |
|
|
if (processing_template_decl)
|
1564 |
|
|
{
|
1565 |
|
|
tree t = build_min (CAST_EXPR, type, parms);
|
1566 |
|
|
/* We don't know if it will or will not have side effects. */
|
1567 |
|
|
TREE_SIDE_EFFECTS (t) = 1;
|
1568 |
|
|
return t;
|
1569 |
|
|
}
|
1570 |
|
|
|
1571 |
|
|
if (! MAYBE_CLASS_TYPE_P (type))
|
1572 |
|
|
{
|
1573 |
|
|
if (parms == NULL_TREE)
|
1574 |
|
|
return cp_convert (type, integer_zero_node);
|
1575 |
|
|
|
1576 |
|
|
/* This must build a C cast. */
|
1577 |
|
|
parms = build_x_compound_expr_from_list (parms, "functional cast");
|
1578 |
|
|
return cp_build_c_cast (type, parms, complain);
|
1579 |
|
|
}
|
1580 |
|
|
|
1581 |
|
|
/* Prepare to evaluate as a call to a constructor. If this expression
|
1582 |
|
|
is actually used, for example,
|
1583 |
|
|
|
1584 |
|
|
return X (arg1, arg2, ...);
|
1585 |
|
|
|
1586 |
|
|
then the slot being initialized will be filled in. */
|
1587 |
|
|
|
1588 |
|
|
if (!complete_type_or_else (type, NULL_TREE))
|
1589 |
|
|
return error_mark_node;
|
1590 |
|
|
if (abstract_virtuals_error (NULL_TREE, type))
|
1591 |
|
|
return error_mark_node;
|
1592 |
|
|
|
1593 |
|
|
/* [expr.type.conv]
|
1594 |
|
|
|
1595 |
|
|
If the expression list is a single-expression, the type
|
1596 |
|
|
conversion is equivalent (in definedness, and if defined in
|
1597 |
|
|
meaning) to the corresponding cast expression. */
|
1598 |
|
|
if (parms && TREE_CHAIN (parms) == NULL_TREE)
|
1599 |
|
|
return cp_build_c_cast (type, TREE_VALUE (parms), complain);
|
1600 |
|
|
|
1601 |
|
|
/* [expr.type.conv]
|
1602 |
|
|
|
1603 |
|
|
The expression T(), where T is a simple-type-specifier for a
|
1604 |
|
|
non-array complete object type or the (possibly cv-qualified)
|
1605 |
|
|
void type, creates an rvalue of the specified type, which is
|
1606 |
|
|
value-initialized. */
|
1607 |
|
|
|
1608 |
|
|
if (parms == NULL_TREE
|
1609 |
|
|
/* If there's a user-defined constructor, value-initialization is
|
1610 |
|
|
just calling the constructor, so fall through. */
|
1611 |
|
|
&& !TYPE_HAS_USER_CONSTRUCTOR (type))
|
1612 |
|
|
{
|
1613 |
|
|
exp = build_value_init (type);
|
1614 |
|
|
return get_target_expr (exp);
|
1615 |
|
|
}
|
1616 |
|
|
|
1617 |
|
|
/* Call the constructor. */
|
1618 |
|
|
parmvec = make_tree_vector ();
|
1619 |
|
|
for (; parms != NULL_TREE; parms = TREE_CHAIN (parms))
|
1620 |
|
|
VEC_safe_push (tree, gc, parmvec, TREE_VALUE (parms));
|
1621 |
|
|
exp = build_special_member_call (NULL_TREE, complete_ctor_identifier,
|
1622 |
|
|
&parmvec, type, LOOKUP_NORMAL, complain);
|
1623 |
|
|
release_tree_vector (parmvec);
|
1624 |
|
|
|
1625 |
|
|
if (exp == error_mark_node)
|
1626 |
|
|
return error_mark_node;
|
1627 |
|
|
|
1628 |
|
|
return build_cplus_new (type, exp);
|
1629 |
|
|
}
|
1630 |
|
|
|
1631 |
|
|
|
1632 |
|
|
/* Add new exception specifier SPEC, to the LIST we currently have.
|
1633 |
|
|
If it's already in LIST then do nothing.
|
1634 |
|
|
Moan if it's bad and we're allowed to. COMPLAIN < 0 means we
|
1635 |
|
|
know what we're doing. */
|
1636 |
|
|
|
1637 |
|
|
tree
|
1638 |
|
|
add_exception_specifier (tree list, tree spec, int complain)
|
1639 |
|
|
{
|
1640 |
|
|
bool ok;
|
1641 |
|
|
tree core = spec;
|
1642 |
|
|
bool is_ptr;
|
1643 |
|
|
diagnostic_t diag_type = DK_UNSPECIFIED; /* none */
|
1644 |
|
|
|
1645 |
|
|
if (spec == error_mark_node)
|
1646 |
|
|
return list;
|
1647 |
|
|
|
1648 |
|
|
gcc_assert (spec && (!list || TREE_VALUE (list)));
|
1649 |
|
|
|
1650 |
|
|
/* [except.spec] 1, type in an exception specifier shall not be
|
1651 |
|
|
incomplete, or pointer or ref to incomplete other than pointer
|
1652 |
|
|
to cv void. */
|
1653 |
|
|
is_ptr = TREE_CODE (core) == POINTER_TYPE;
|
1654 |
|
|
if (is_ptr || TREE_CODE (core) == REFERENCE_TYPE)
|
1655 |
|
|
core = TREE_TYPE (core);
|
1656 |
|
|
if (complain < 0)
|
1657 |
|
|
ok = true;
|
1658 |
|
|
else if (VOID_TYPE_P (core))
|
1659 |
|
|
ok = is_ptr;
|
1660 |
|
|
else if (TREE_CODE (core) == TEMPLATE_TYPE_PARM)
|
1661 |
|
|
ok = true;
|
1662 |
|
|
else if (processing_template_decl)
|
1663 |
|
|
ok = true;
|
1664 |
|
|
else
|
1665 |
|
|
{
|
1666 |
|
|
ok = true;
|
1667 |
|
|
/* 15.4/1 says that types in an exception specifier must be complete,
|
1668 |
|
|
but it seems more reasonable to only require this on definitions
|
1669 |
|
|
and calls. So just give a pedwarn at this point; we will give an
|
1670 |
|
|
error later if we hit one of those two cases. */
|
1671 |
|
|
if (!COMPLETE_TYPE_P (complete_type (core)))
|
1672 |
|
|
diag_type = DK_PEDWARN; /* pedwarn */
|
1673 |
|
|
}
|
1674 |
|
|
|
1675 |
|
|
if (ok)
|
1676 |
|
|
{
|
1677 |
|
|
tree probe;
|
1678 |
|
|
|
1679 |
|
|
for (probe = list; probe; probe = TREE_CHAIN (probe))
|
1680 |
|
|
if (same_type_p (TREE_VALUE (probe), spec))
|
1681 |
|
|
break;
|
1682 |
|
|
if (!probe)
|
1683 |
|
|
list = tree_cons (NULL_TREE, spec, list);
|
1684 |
|
|
}
|
1685 |
|
|
else
|
1686 |
|
|
diag_type = DK_ERROR; /* error */
|
1687 |
|
|
|
1688 |
|
|
if (diag_type != DK_UNSPECIFIED && complain)
|
1689 |
|
|
cxx_incomplete_type_diagnostic (NULL_TREE, core, diag_type);
|
1690 |
|
|
|
1691 |
|
|
return list;
|
1692 |
|
|
}
|
1693 |
|
|
|
1694 |
|
|
/* Combine the two exceptions specifier lists LIST and ADD, and return
|
1695 |
|
|
their union. */
|
1696 |
|
|
|
1697 |
|
|
tree
|
1698 |
|
|
merge_exception_specifiers (tree list, tree add)
|
1699 |
|
|
{
|
1700 |
|
|
if (!list || !add)
|
1701 |
|
|
return NULL_TREE;
|
1702 |
|
|
else if (!TREE_VALUE (list))
|
1703 |
|
|
return add;
|
1704 |
|
|
else if (!TREE_VALUE (add))
|
1705 |
|
|
return list;
|
1706 |
|
|
else
|
1707 |
|
|
{
|
1708 |
|
|
tree orig_list = list;
|
1709 |
|
|
|
1710 |
|
|
for (; add; add = TREE_CHAIN (add))
|
1711 |
|
|
{
|
1712 |
|
|
tree spec = TREE_VALUE (add);
|
1713 |
|
|
tree probe;
|
1714 |
|
|
|
1715 |
|
|
for (probe = orig_list; probe; probe = TREE_CHAIN (probe))
|
1716 |
|
|
if (same_type_p (TREE_VALUE (probe), spec))
|
1717 |
|
|
break;
|
1718 |
|
|
if (!probe)
|
1719 |
|
|
{
|
1720 |
|
|
spec = build_tree_list (NULL_TREE, spec);
|
1721 |
|
|
TREE_CHAIN (spec) = list;
|
1722 |
|
|
list = spec;
|
1723 |
|
|
}
|
1724 |
|
|
}
|
1725 |
|
|
}
|
1726 |
|
|
return list;
|
1727 |
|
|
}
|
1728 |
|
|
|
1729 |
|
|
/* Subroutine of build_call. Ensure that each of the types in the
|
1730 |
|
|
exception specification is complete. Technically, 15.4/1 says that
|
1731 |
|
|
they need to be complete when we see a declaration of the function,
|
1732 |
|
|
but we should be able to get away with only requiring this when the
|
1733 |
|
|
function is defined or called. See also add_exception_specifier. */
|
1734 |
|
|
|
1735 |
|
|
void
|
1736 |
|
|
require_complete_eh_spec_types (tree fntype, tree decl)
|
1737 |
|
|
{
|
1738 |
|
|
tree raises;
|
1739 |
|
|
/* Don't complain about calls to op new. */
|
1740 |
|
|
if (decl && DECL_ARTIFICIAL (decl))
|
1741 |
|
|
return;
|
1742 |
|
|
for (raises = TYPE_RAISES_EXCEPTIONS (fntype); raises;
|
1743 |
|
|
raises = TREE_CHAIN (raises))
|
1744 |
|
|
{
|
1745 |
|
|
tree type = TREE_VALUE (raises);
|
1746 |
|
|
if (type && !COMPLETE_TYPE_P (type))
|
1747 |
|
|
{
|
1748 |
|
|
if (decl)
|
1749 |
|
|
error
|
1750 |
|
|
("call to function %qD which throws incomplete type %q#T",
|
1751 |
|
|
decl, type);
|
1752 |
|
|
else
|
1753 |
|
|
error ("call to function which throws incomplete type %q#T",
|
1754 |
|
|
decl);
|
1755 |
|
|
}
|
1756 |
|
|
}
|
1757 |
|
|
}
|
1758 |
|
|
|
1759 |
|
|
|
1760 |
|
|
#include "gt-cp-typeck2.h"
|