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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- A S P E C T S --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 2010-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. --
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17 -- --
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18 -- As a special exception under Section 7 of GPL version 3, you are granted --
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19 -- additional permissions described in the GCC Runtime Library Exception, --
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20 -- version 3.1, as published by the Free Software Foundation. --
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21 -- --
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22 -- You should have received a copy of the GNU General Public License and --
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23 -- a copy of the GCC Runtime Library Exception along with this program; --
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24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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25 -- <http://www.gnu.org/licenses/>. --
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26 -- --
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27 -- GNAT was originally developed by the GNAT team at New York University. --
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28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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29 -- --
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30 ------------------------------------------------------------------------------
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31
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32 -- This package defines the aspects that are recognized by GNAT in aspect
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33 -- specifications. It also contains the subprograms for storing/retrieving
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34 -- aspect specifications from the tree. The semantic processing for aspect
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35 -- specifications is found in Sem_Ch13.Analyze_Aspect_Specifications.
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36
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37 ------------------------
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38 -- Adding New Aspects --
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39 ------------------------
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40
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41 -- In general, each aspect should have a corresponding pragma, so that the
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42 -- newly developed functionality is available for Ada versions < Ada 2012.
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43 -- When both are defined, it is convenient to first transform the aspect into
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44 -- an equivalent pragma in Sem_Ch13.Analyze_Aspect_Specifications, and then
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45 -- analyze the pragma in Sem_Prag.Analyze_Pragma.
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46
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47 -- To add a new aspect, you need to do the following
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48
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49 -- 1. Create a name in snames.ads-tmpl
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50
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51 -- 2. Create a value in type Aspect_Id in this unit
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52
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53 -- 3. Add a value for the aspect in the global arrays defined in this unit
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54
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55 -- 4. Add code for the aspect in Sem_Ch13.Analyze_Aspect_Specifications.
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56 -- This may involve adding some nodes to the tree to perform additional
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57 -- treatments later.
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58
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59 -- 5. If the semantic analysis of expressions/names in the aspect should not
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60 -- occur at the point the aspect is defined, add code in the adequate
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61 -- semantic analysis procedure for the aspect. For example, this is the
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131
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62 -- case for aspects Pre and Post on subprograms, which are preanalyzed
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63 -- at the end of the declaration list to which the subprogram belongs,
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64 -- and fully analyzed (possibly with expansion) during the semantic
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65 -- analysis of subprogram bodies.
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66
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67 with Namet; use Namet;
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68 with Snames; use Snames;
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69 with Types; use Types;
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70
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71 package Aspects is
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72
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73 -- Type defining recognized aspects
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74
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75 type Aspect_Id is
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76 (No_Aspect, -- Dummy entry for no aspect
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77 Aspect_Abstract_State, -- GNAT
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78 Aspect_Address,
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79 Aspect_Alignment,
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80 Aspect_Annotate, -- GNAT
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81 Aspect_Async_Readers, -- GNAT
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82 Aspect_Async_Writers, -- GNAT
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83 Aspect_Attach_Handler,
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84 Aspect_Bit_Order,
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85 Aspect_Component_Size,
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86 Aspect_Constant_After_Elaboration, -- GNAT
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87 Aspect_Constant_Indexing,
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88 Aspect_Contract_Cases, -- GNAT
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89 Aspect_Convention,
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90 Aspect_CPU,
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91 Aspect_Default_Component_Value,
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92 Aspect_Default_Initial_Condition, -- GNAT
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93 Aspect_Default_Iterator,
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94 Aspect_Default_Storage_Pool,
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95 Aspect_Default_Value,
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96 Aspect_Depends, -- GNAT
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97 Aspect_Dimension, -- GNAT
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98 Aspect_Dimension_System, -- GNAT
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99 Aspect_Dispatching_Domain,
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100 Aspect_Dynamic_Predicate,
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101 Aspect_Effective_Reads, -- GNAT
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102 Aspect_Effective_Writes, -- GNAT
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103 Aspect_Extensions_Visible, -- GNAT
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104 Aspect_External_Name,
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105 Aspect_External_Tag,
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106 Aspect_Ghost, -- GNAT
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107 Aspect_Global, -- GNAT
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108 Aspect_Implicit_Dereference,
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109 Aspect_Initial_Condition, -- GNAT
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110 Aspect_Initializes, -- GNAT
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111 Aspect_Input,
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112 Aspect_Interrupt_Priority,
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113 Aspect_Invariant, -- GNAT
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114 Aspect_Iterator_Element,
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115 Aspect_Iterable, -- GNAT
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116 Aspect_Link_Name,
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117 Aspect_Linker_Section, -- GNAT
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118 Aspect_Machine_Radix,
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119 Aspect_Max_Entry_Queue_Depth,
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120 Aspect_Max_Queue_Length, -- GNAT
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121 Aspect_Object_Size, -- GNAT
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122 Aspect_Obsolescent, -- GNAT
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123 Aspect_Output,
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124 Aspect_Part_Of, -- GNAT
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125 Aspect_Post,
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126 Aspect_Postcondition,
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127 Aspect_Pre,
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128 Aspect_Precondition,
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129 Aspect_Predicate, -- GNAT
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130 Aspect_Predicate_Failure,
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131 Aspect_Priority,
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132 Aspect_Read,
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133 Aspect_Refined_Depends, -- GNAT
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134 Aspect_Refined_Global, -- GNAT
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135 Aspect_Refined_Post, -- GNAT
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136 Aspect_Refined_State, -- GNAT
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137 Aspect_Relative_Deadline,
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138 Aspect_Scalar_Storage_Order, -- GNAT
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139 Aspect_Secondary_Stack_Size, -- GNAT
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140 Aspect_Simple_Storage_Pool, -- GNAT
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141 Aspect_Size,
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142 Aspect_Small,
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143 Aspect_SPARK_Mode, -- GNAT
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144 Aspect_Static_Predicate,
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145 Aspect_Storage_Pool,
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146 Aspect_Storage_Size,
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147 Aspect_Stream_Size,
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148 Aspect_Suppress,
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149 Aspect_Synchronization,
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150 Aspect_Test_Case, -- GNAT
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151 Aspect_Type_Invariant,
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152 Aspect_Unimplemented, -- GNAT
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153 Aspect_Unsuppress,
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154 Aspect_Value_Size, -- GNAT
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155 Aspect_Variable_Indexing,
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156 Aspect_Volatile_Function, -- GNAT
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157 Aspect_Warnings, -- GNAT
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158 Aspect_Write,
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159
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160 -- The following aspects correspond to library unit pragmas
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161
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162 Aspect_All_Calls_Remote,
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163 Aspect_Elaborate_Body,
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164 Aspect_No_Elaboration_Code_All, -- GNAT
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165 Aspect_Preelaborate,
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166 Aspect_Pure,
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167 Aspect_Remote_Call_Interface,
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168 Aspect_Remote_Types,
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169 Aspect_Shared_Passive,
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170 Aspect_Universal_Data, -- GNAT
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171
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172 -- Remaining aspects have a static boolean value that turns the aspect
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173 -- on or off. They all correspond to pragmas, but are only converted to
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174 -- the pragmas where the value is True. A value of False normally means
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175 -- that the aspect is ignored, except in the case of derived types where
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176 -- the aspect value is inherited from the parent, in which case, we do
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177 -- not allow False if we inherit a True value from the parent.
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178
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179 Aspect_Asynchronous,
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180 Aspect_Atomic,
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181 Aspect_Atomic_Components,
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182 Aspect_Disable_Controlled, -- GNAT
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183 Aspect_Discard_Names,
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184 Aspect_Export,
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185 Aspect_Favor_Top_Level, -- GNAT
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186 Aspect_Independent,
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187 Aspect_Independent_Components,
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188 Aspect_Import,
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189 Aspect_Inline,
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190 Aspect_Inline_Always, -- GNAT
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191 Aspect_Interrupt_Handler,
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192 Aspect_Lock_Free, -- GNAT
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193 Aspect_No_Inline, -- GNAT
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194 Aspect_No_Return,
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195 Aspect_No_Tagged_Streams, -- GNAT
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196 Aspect_Pack,
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197 Aspect_Persistent_BSS, -- GNAT
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198 Aspect_Preelaborable_Initialization,
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199 Aspect_Pure_Function, -- GNAT
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200 Aspect_Remote_Access_Type, -- GNAT
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201 Aspect_Shared, -- GNAT (equivalent to Atomic)
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202 Aspect_Simple_Storage_Pool_Type, -- GNAT
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203 Aspect_Suppress_Debug_Info, -- GNAT
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204 Aspect_Suppress_Initialization, -- GNAT
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205 Aspect_Thread_Local_Storage, -- GNAT
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206 Aspect_Unchecked_Union,
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207 Aspect_Universal_Aliasing, -- GNAT
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208 Aspect_Unmodified, -- GNAT
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209 Aspect_Unreferenced, -- GNAT
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210 Aspect_Unreferenced_Objects, -- GNAT
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211 Aspect_Volatile,
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212 Aspect_Volatile_Components,
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213 Aspect_Volatile_Full_Access); -- GNAT
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214
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215 subtype Aspect_Id_Exclude_No_Aspect is
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216 Aspect_Id range Aspect_Id'Succ (No_Aspect) .. Aspect_Id'Last;
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217 -- Aspect_Id's excluding No_Aspect
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218
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219 -- The following array indicates aspects that accept 'Class
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220
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221 Class_Aspect_OK : constant array (Aspect_Id) of Boolean :=
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222 (Aspect_Input => True,
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223 Aspect_Invariant => True,
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224 Aspect_Output => True,
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225 Aspect_Pre => True,
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226 Aspect_Predicate => True,
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227 Aspect_Post => True,
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228 Aspect_Read => True,
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229 Aspect_Write => True,
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230 Aspect_Type_Invariant => True,
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231 others => False);
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232
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233 -- The following array identifies all implementation defined aspects
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234
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235 Implementation_Defined_Aspect : constant array (Aspect_Id) of Boolean :=
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236 (Aspect_Abstract_State => True,
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237 Aspect_Annotate => True,
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238 Aspect_Async_Readers => True,
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239 Aspect_Async_Writers => True,
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240 Aspect_Constant_After_Elaboration => True,
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241 Aspect_Contract_Cases => True,
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242 Aspect_Depends => True,
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243 Aspect_Dimension => True,
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244 Aspect_Dimension_System => True,
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245 Aspect_Effective_Reads => True,
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246 Aspect_Effective_Writes => True,
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247 Aspect_Extensions_Visible => True,
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248 Aspect_Favor_Top_Level => True,
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249 Aspect_Ghost => True,
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250 Aspect_Global => True,
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251 Aspect_Inline_Always => True,
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252 Aspect_Invariant => True,
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253 Aspect_Lock_Free => True,
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131
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254 Aspect_Max_Entry_Queue_Depth => True,
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111
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255 Aspect_Max_Queue_Length => True,
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256 Aspect_Object_Size => True,
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257 Aspect_Persistent_BSS => True,
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258 Aspect_Predicate => True,
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259 Aspect_Pure_Function => True,
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260 Aspect_Remote_Access_Type => True,
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261 Aspect_Scalar_Storage_Order => True,
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262 Aspect_Secondary_Stack_Size => True,
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263 Aspect_Shared => True,
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264 Aspect_Simple_Storage_Pool => True,
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265 Aspect_Simple_Storage_Pool_Type => True,
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266 Aspect_Suppress_Debug_Info => True,
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267 Aspect_Suppress_Initialization => True,
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268 Aspect_Thread_Local_Storage => True,
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269 Aspect_Test_Case => True,
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270 Aspect_Universal_Aliasing => True,
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271 Aspect_Universal_Data => True,
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272 Aspect_Unmodified => True,
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273 Aspect_Unreferenced => True,
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274 Aspect_Unreferenced_Objects => True,
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275 Aspect_Value_Size => True,
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276 Aspect_Volatile_Function => True,
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277 Aspect_Warnings => True,
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278 others => False);
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279
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280 -- The following array indicates aspects for which multiple occurrences of
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281 -- the same aspect attached to the same declaration are allowed.
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282
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283 No_Duplicates_Allowed : constant array (Aspect_Id) of Boolean :=
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284 (Aspect_Annotate => False,
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285 Aspect_Test_Case => False,
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286 others => True);
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287
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288 -- The following subtype defines aspects corresponding to library unit
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289 -- pragmas, these can only validly appear as aspects for library units,
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290 -- and result in a corresponding pragma being inserted immediately after
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291 -- the occurrence of the aspect.
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292
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293 subtype Library_Unit_Aspects is
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294 Aspect_Id range Aspect_All_Calls_Remote .. Aspect_Universal_Data;
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295
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296 -- The following subtype defines aspects accepting an optional static
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297 -- boolean parameter indicating if the aspect should be active or
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298 -- cancelling. If the parameter is missing the effective value is True,
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299 -- enabling the aspect. If the parameter is present it must be a static
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300 -- expression of type Standard.Boolean. If the value is True, then the
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301 -- aspect is enabled. If it is False, the aspect is disabled.
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302
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303 subtype Boolean_Aspects is
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304 Aspect_Id range Aspect_Asynchronous .. Aspect_Id'Last;
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305
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306 subtype Pre_Post_Aspects is
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307 Aspect_Id range Aspect_Post .. Aspect_Precondition;
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308
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309 -- The following type is used for indicating allowed expression forms
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310
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311 type Aspect_Expression is
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312 (Expression, -- Required expression
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313 Name, -- Required name
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314 Optional_Expression, -- Optional boolean expression
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315 Optional_Name); -- Optional name
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316
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317 -- The following array indicates what argument type is required
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318
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319 Aspect_Argument : constant array (Aspect_Id) of Aspect_Expression :=
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320 (No_Aspect => Optional_Expression,
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321 Aspect_Abstract_State => Expression,
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322 Aspect_Address => Expression,
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323 Aspect_Alignment => Expression,
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324 Aspect_Annotate => Expression,
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325 Aspect_Async_Readers => Optional_Expression,
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326 Aspect_Async_Writers => Optional_Expression,
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327 Aspect_Attach_Handler => Expression,
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328 Aspect_Bit_Order => Expression,
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329 Aspect_Component_Size => Expression,
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330 Aspect_Constant_After_Elaboration => Optional_Expression,
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331 Aspect_Constant_Indexing => Name,
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332 Aspect_Contract_Cases => Expression,
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333 Aspect_Convention => Name,
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334 Aspect_CPU => Expression,
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335 Aspect_Default_Component_Value => Expression,
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336 Aspect_Default_Initial_Condition => Optional_Expression,
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337 Aspect_Default_Iterator => Name,
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338 Aspect_Default_Storage_Pool => Expression,
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339 Aspect_Default_Value => Expression,
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340 Aspect_Depends => Expression,
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341 Aspect_Dimension => Expression,
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342 Aspect_Dimension_System => Expression,
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343 Aspect_Dispatching_Domain => Expression,
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344 Aspect_Dynamic_Predicate => Expression,
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345 Aspect_Effective_Reads => Optional_Expression,
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346 Aspect_Effective_Writes => Optional_Expression,
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347 Aspect_Extensions_Visible => Optional_Expression,
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348 Aspect_External_Name => Expression,
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349 Aspect_External_Tag => Expression,
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350 Aspect_Ghost => Optional_Expression,
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351 Aspect_Global => Expression,
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352 Aspect_Implicit_Dereference => Name,
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353 Aspect_Initial_Condition => Expression,
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354 Aspect_Initializes => Expression,
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355 Aspect_Input => Name,
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356 Aspect_Interrupt_Priority => Expression,
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357 Aspect_Invariant => Expression,
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358 Aspect_Iterable => Expression,
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359 Aspect_Iterator_Element => Name,
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360 Aspect_Link_Name => Expression,
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361 Aspect_Linker_Section => Expression,
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362 Aspect_Machine_Radix => Expression,
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131
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363 Aspect_Max_Entry_Queue_Depth => Expression,
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111
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364 Aspect_Max_Queue_Length => Expression,
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365 Aspect_Object_Size => Expression,
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366 Aspect_Obsolescent => Optional_Expression,
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367 Aspect_Output => Name,
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368 Aspect_Part_Of => Expression,
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369 Aspect_Post => Expression,
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370 Aspect_Postcondition => Expression,
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371 Aspect_Pre => Expression,
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372 Aspect_Precondition => Expression,
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373 Aspect_Predicate => Expression,
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374 Aspect_Predicate_Failure => Expression,
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375 Aspect_Priority => Expression,
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376 Aspect_Read => Name,
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377 Aspect_Refined_Depends => Expression,
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378 Aspect_Refined_Global => Expression,
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379 Aspect_Refined_Post => Expression,
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380 Aspect_Refined_State => Expression,
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381 Aspect_Relative_Deadline => Expression,
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382 Aspect_Scalar_Storage_Order => Expression,
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383 Aspect_Secondary_Stack_Size => Expression,
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384 Aspect_Simple_Storage_Pool => Name,
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385 Aspect_Size => Expression,
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386 Aspect_Small => Expression,
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387 Aspect_SPARK_Mode => Optional_Name,
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388 Aspect_Static_Predicate => Expression,
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389 Aspect_Storage_Pool => Name,
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390 Aspect_Storage_Size => Expression,
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391 Aspect_Stream_Size => Expression,
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392 Aspect_Suppress => Name,
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393 Aspect_Synchronization => Name,
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394 Aspect_Test_Case => Expression,
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|
395 Aspect_Type_Invariant => Expression,
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396 Aspect_Unimplemented => Optional_Expression,
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397 Aspect_Unsuppress => Name,
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398 Aspect_Value_Size => Expression,
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399 Aspect_Variable_Indexing => Name,
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400 Aspect_Volatile_Function => Optional_Expression,
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401 Aspect_Warnings => Name,
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402 Aspect_Write => Name,
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403
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404 Boolean_Aspects => Optional_Expression,
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405 Library_Unit_Aspects => Optional_Expression);
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406
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407 -----------------------------------------
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|
408 -- Table Linking Names and Aspect_Id's --
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409 -----------------------------------------
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410
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411 -- Table linking aspect names and id's
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412
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413 Aspect_Names : constant array (Aspect_Id) of Name_Id :=
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414 (No_Aspect => No_Name,
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415 Aspect_Abstract_State => Name_Abstract_State,
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416 Aspect_Address => Name_Address,
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417 Aspect_Alignment => Name_Alignment,
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418 Aspect_All_Calls_Remote => Name_All_Calls_Remote,
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419 Aspect_Annotate => Name_Annotate,
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420 Aspect_Async_Readers => Name_Async_Readers,
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421 Aspect_Async_Writers => Name_Async_Writers,
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422 Aspect_Asynchronous => Name_Asynchronous,
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423 Aspect_Atomic => Name_Atomic,
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424 Aspect_Atomic_Components => Name_Atomic_Components,
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425 Aspect_Attach_Handler => Name_Attach_Handler,
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426 Aspect_Bit_Order => Name_Bit_Order,
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427 Aspect_Component_Size => Name_Component_Size,
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428 Aspect_Constant_After_Elaboration => Name_Constant_After_Elaboration,
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429 Aspect_Constant_Indexing => Name_Constant_Indexing,
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430 Aspect_Contract_Cases => Name_Contract_Cases,
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431 Aspect_Convention => Name_Convention,
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432 Aspect_CPU => Name_CPU,
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433 Aspect_Default_Component_Value => Name_Default_Component_Value,
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434 Aspect_Default_Initial_Condition => Name_Default_Initial_Condition,
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435 Aspect_Default_Iterator => Name_Default_Iterator,
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436 Aspect_Default_Storage_Pool => Name_Default_Storage_Pool,
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437 Aspect_Default_Value => Name_Default_Value,
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438 Aspect_Depends => Name_Depends,
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|
439 Aspect_Dimension => Name_Dimension,
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440 Aspect_Dimension_System => Name_Dimension_System,
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441 Aspect_Disable_Controlled => Name_Disable_Controlled,
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442 Aspect_Discard_Names => Name_Discard_Names,
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|
443 Aspect_Dispatching_Domain => Name_Dispatching_Domain,
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444 Aspect_Dynamic_Predicate => Name_Dynamic_Predicate,
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445 Aspect_Effective_Reads => Name_Effective_Reads,
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|
446 Aspect_Effective_Writes => Name_Effective_Writes,
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|
447 Aspect_Elaborate_Body => Name_Elaborate_Body,
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|
448 Aspect_Export => Name_Export,
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|
449 Aspect_Extensions_Visible => Name_Extensions_Visible,
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|
450 Aspect_External_Name => Name_External_Name,
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|
451 Aspect_External_Tag => Name_External_Tag,
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|
|
452 Aspect_Favor_Top_Level => Name_Favor_Top_Level,
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|
|
453 Aspect_Ghost => Name_Ghost,
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|
454 Aspect_Global => Name_Global,
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|
455 Aspect_Implicit_Dereference => Name_Implicit_Dereference,
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|
456 Aspect_Import => Name_Import,
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|
457 Aspect_Independent => Name_Independent,
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|
458 Aspect_Independent_Components => Name_Independent_Components,
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|
|
459 Aspect_Inline => Name_Inline,
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|
460 Aspect_Inline_Always => Name_Inline_Always,
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|
|
461 Aspect_Initial_Condition => Name_Initial_Condition,
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|
|
462 Aspect_Initializes => Name_Initializes,
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|
|
463 Aspect_Input => Name_Input,
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|
|
464 Aspect_Interrupt_Handler => Name_Interrupt_Handler,
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|
|
465 Aspect_Interrupt_Priority => Name_Interrupt_Priority,
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|
|
466 Aspect_Invariant => Name_Invariant,
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|
|
467 Aspect_Iterator_Element => Name_Iterator_Element,
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|
|
468 Aspect_Iterable => Name_Iterable,
|
|
|
469 Aspect_Link_Name => Name_Link_Name,
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|
|
470 Aspect_Linker_Section => Name_Linker_Section,
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|
|
471 Aspect_Lock_Free => Name_Lock_Free,
|
|
|
472 Aspect_Machine_Radix => Name_Machine_Radix,
|
|
131
|
473 Aspect_Max_Entry_Queue_Depth => Name_Max_Entry_Queue_Depth,
|
|
111
|
474 Aspect_Max_Queue_Length => Name_Max_Queue_Length,
|
|
|
475 Aspect_No_Elaboration_Code_All => Name_No_Elaboration_Code_All,
|
|
|
476 Aspect_No_Inline => Name_No_Inline,
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|
|
477 Aspect_No_Return => Name_No_Return,
|
|
|
478 Aspect_No_Tagged_Streams => Name_No_Tagged_Streams,
|
|
|
479 Aspect_Object_Size => Name_Object_Size,
|
|
|
480 Aspect_Obsolescent => Name_Obsolescent,
|
|
|
481 Aspect_Output => Name_Output,
|
|
|
482 Aspect_Pack => Name_Pack,
|
|
|
483 Aspect_Part_Of => Name_Part_Of,
|
|
|
484 Aspect_Persistent_BSS => Name_Persistent_BSS,
|
|
|
485 Aspect_Post => Name_Post,
|
|
|
486 Aspect_Postcondition => Name_Postcondition,
|
|
|
487 Aspect_Pre => Name_Pre,
|
|
|
488 Aspect_Precondition => Name_Precondition,
|
|
|
489 Aspect_Predicate => Name_Predicate,
|
|
|
490 Aspect_Predicate_Failure => Name_Predicate_Failure,
|
|
|
491 Aspect_Preelaborable_Initialization => Name_Preelaborable_Initialization,
|
|
|
492 Aspect_Preelaborate => Name_Preelaborate,
|
|
|
493 Aspect_Priority => Name_Priority,
|
|
|
494 Aspect_Pure => Name_Pure,
|
|
|
495 Aspect_Pure_Function => Name_Pure_Function,
|
|
|
496 Aspect_Read => Name_Read,
|
|
|
497 Aspect_Refined_Depends => Name_Refined_Depends,
|
|
|
498 Aspect_Refined_Global => Name_Refined_Global,
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|
|
499 Aspect_Refined_Post => Name_Refined_Post,
|
|
|
500 Aspect_Refined_State => Name_Refined_State,
|
|
|
501 Aspect_Relative_Deadline => Name_Relative_Deadline,
|
|
|
502 Aspect_Remote_Access_Type => Name_Remote_Access_Type,
|
|
|
503 Aspect_Remote_Call_Interface => Name_Remote_Call_Interface,
|
|
|
504 Aspect_Remote_Types => Name_Remote_Types,
|
|
|
505 Aspect_Scalar_Storage_Order => Name_Scalar_Storage_Order,
|
|
|
506 Aspect_Secondary_Stack_Size => Name_Secondary_Stack_Size,
|
|
|
507 Aspect_Shared => Name_Shared,
|
|
|
508 Aspect_Shared_Passive => Name_Shared_Passive,
|
|
|
509 Aspect_Simple_Storage_Pool => Name_Simple_Storage_Pool,
|
|
|
510 Aspect_Simple_Storage_Pool_Type => Name_Simple_Storage_Pool_Type,
|
|
|
511 Aspect_Size => Name_Size,
|
|
|
512 Aspect_Small => Name_Small,
|
|
|
513 Aspect_SPARK_Mode => Name_SPARK_Mode,
|
|
|
514 Aspect_Static_Predicate => Name_Static_Predicate,
|
|
|
515 Aspect_Storage_Pool => Name_Storage_Pool,
|
|
|
516 Aspect_Storage_Size => Name_Storage_Size,
|
|
|
517 Aspect_Stream_Size => Name_Stream_Size,
|
|
|
518 Aspect_Suppress => Name_Suppress,
|
|
|
519 Aspect_Suppress_Debug_Info => Name_Suppress_Debug_Info,
|
|
|
520 Aspect_Suppress_Initialization => Name_Suppress_Initialization,
|
|
|
521 Aspect_Thread_Local_Storage => Name_Thread_Local_Storage,
|
|
|
522 Aspect_Synchronization => Name_Synchronization,
|
|
|
523 Aspect_Test_Case => Name_Test_Case,
|
|
|
524 Aspect_Type_Invariant => Name_Type_Invariant,
|
|
|
525 Aspect_Unchecked_Union => Name_Unchecked_Union,
|
|
|
526 Aspect_Unimplemented => Name_Unimplemented,
|
|
|
527 Aspect_Universal_Aliasing => Name_Universal_Aliasing,
|
|
|
528 Aspect_Universal_Data => Name_Universal_Data,
|
|
|
529 Aspect_Unmodified => Name_Unmodified,
|
|
|
530 Aspect_Unreferenced => Name_Unreferenced,
|
|
|
531 Aspect_Unreferenced_Objects => Name_Unreferenced_Objects,
|
|
|
532 Aspect_Unsuppress => Name_Unsuppress,
|
|
|
533 Aspect_Value_Size => Name_Value_Size,
|
|
|
534 Aspect_Variable_Indexing => Name_Variable_Indexing,
|
|
|
535 Aspect_Volatile => Name_Volatile,
|
|
|
536 Aspect_Volatile_Components => Name_Volatile_Components,
|
|
|
537 Aspect_Volatile_Full_Access => Name_Volatile_Full_Access,
|
|
|
538 Aspect_Volatile_Function => Name_Volatile_Function,
|
|
|
539 Aspect_Warnings => Name_Warnings,
|
|
|
540 Aspect_Write => Name_Write);
|
|
|
541
|
|
|
542 function Get_Aspect_Id (Name : Name_Id) return Aspect_Id;
|
|
|
543 pragma Inline (Get_Aspect_Id);
|
|
|
544 -- Given a name Nam, returns the corresponding aspect id value. If the name
|
|
|
545 -- does not match any aspect, then No_Aspect is returned as the result.
|
|
|
546
|
|
|
547 function Get_Aspect_Id (Aspect : Node_Id) return Aspect_Id;
|
|
|
548 pragma Inline (Get_Aspect_Id);
|
|
|
549 -- Given an aspect specification, return the corresponding aspect_id value.
|
|
|
550 -- If the name does not match any aspect, return No_Aspect.
|
|
|
551
|
|
|
552 ------------------------------------
|
|
|
553 -- Delaying Evaluation of Aspects --
|
|
|
554 ------------------------------------
|
|
|
555
|
|
|
556 -- The RM requires that all language defined aspects taking an expression
|
|
|
557 -- delay evaluation of the expression till the freeze point of the entity
|
|
|
558 -- to which the aspect applies. This allows forward references, and is of
|
|
|
559 -- use for example in connection with preconditions and postconditions
|
|
|
560 -- where the requirement of making all references in contracts to local
|
|
|
561 -- functions be backwards references would be onerous.
|
|
|
562
|
|
|
563 -- For consistency, even attributes like Size are delayed, so we can do:
|
|
|
564
|
|
|
565 -- type A is range 1 .. 10
|
|
|
566 -- with Size => Not_Defined_Yet;
|
|
|
567 -- ..
|
|
|
568 -- Not_Defined_Yet : constant := 64;
|
|
|
569
|
|
|
570 -- Resulting in A having a size of 64, which gets set when A is frozen.
|
|
|
571 -- Furthermore, we can have a situation like
|
|
|
572
|
|
|
573 -- type A is range 1 .. 10
|
|
|
574 -- with Size => Not_Defined_Yet;
|
|
|
575 -- ..
|
|
|
576 -- type B is new A;
|
|
|
577 -- ..
|
|
|
578 -- Not_Defined_Yet : constant := 64;
|
|
|
579
|
|
|
580 -- where the Size of A is considered to have been previously specified at
|
|
|
581 -- the point of derivation, even though the actual value of the size is
|
|
|
582 -- not known yet, and in this example B inherits the size value of 64.
|
|
|
583
|
|
|
584 -- Our normal implementation model (prior to Ada 2012) was simply to copy
|
|
|
585 -- inheritable attributes at the point of derivation. Then any subsequent
|
|
|
586 -- representation items apply either to the parent type, not affecting the
|
|
|
587 -- derived type, or to the derived type, not affecting the parent type.
|
|
|
588
|
|
|
589 -- To deal with the delayed aspect case, we use two flags. The first is
|
|
|
590 -- set on the parent type if it has delayed representation aspects. This
|
|
|
591 -- flag Has_Delayed_Rep_Aspects indicates that if we derive from this type
|
|
|
592 -- we have to worry about making sure we inherit any delayed aspects. The
|
|
|
593 -- second flag is set on a derived type: May_Have_Inherited_Rep_Aspects
|
|
|
594 -- is set if the parent type has Has_Delayed_Rep_Aspects set.
|
|
|
595
|
|
|
596 -- When we freeze a derived type, if the May_Have_Inherited_Rep_Aspects
|
|
|
597 -- flag is set, then we call Freeze.Inherit_Delayed_Rep_Aspects when
|
|
|
598 -- the derived type is frozen, which deals with the necessary copying of
|
|
|
599 -- information from the parent type, which must be frozen at that point
|
|
|
600 -- (since freezing the derived type first freezes the parent type).
|
|
|
601
|
|
|
602 -- SPARK 2014 aspects do not follow the general delay mechanism as they
|
|
|
603 -- act as annotations and cannot modify the attributes of their related
|
|
|
604 -- constructs. To handle forward references in such aspects, the compiler
|
|
|
605 -- delays the analysis of their respective pragmas by collecting them in
|
|
|
606 -- N_Contract nodes. The pragmas are then analyzed at the end of the
|
|
|
607 -- declarative region containing the related construct. For details,
|
|
|
608 -- see routines Analyze_xxx_In_Decl_Part.
|
|
|
609
|
|
|
610 -- The following shows which aspects are delayed. There are three cases:
|
|
|
611
|
|
|
612 type Delay_Type is
|
|
|
613 (Always_Delay,
|
|
|
614 -- This aspect is not a representation aspect that can be inherited and
|
|
|
615 -- is always delayed, as required by the language definition.
|
|
|
616
|
|
|
617 Never_Delay,
|
|
|
618 -- There are two cases. There are language defined aspects like
|
|
|
619 -- Convention where the "expression" is simply an uninterpreted
|
|
|
620 -- identifier, and there is no issue of evaluating it and thus no
|
|
|
621 -- issue of delaying the evaluation. The second case is implementation
|
|
|
622 -- defined aspects where we have decided that we don't want to allow
|
|
|
623 -- delays (and for our own aspects we can do what we like).
|
|
|
624
|
|
|
625 Rep_Aspect);
|
|
|
626 -- These are the cases of representation aspects that are in general
|
|
|
627 -- delayed, and where there is a potential issue of derived types that
|
|
|
628 -- inherit delayed representation values.
|
|
|
629
|
|
|
630 -- Note: even if this table indicates that an aspect is delayed, we never
|
|
|
631 -- delay Boolean aspects that have a missing expression (taken as True),
|
|
|
632 -- or expressions for delayed rep items that consist of an integer literal
|
|
|
633 -- (most cases of Size etc. in practice), since in these cases we know we
|
|
|
634 -- can get the value of the expression without delay. Note that we still
|
|
|
635 -- need to delay Boolean aspects that are specifically set to True:
|
|
|
636
|
|
|
637 -- type R is array (0 .. 31) of Boolean
|
|
|
638 -- with Pack => True;
|
|
|
639 -- True : constant Boolean := False;
|
|
|
640
|
|
|
641 -- This is nonsense, but we need to make it work and result in R not
|
|
|
642 -- being packed, and if we have something like:
|
|
|
643
|
|
|
644 -- type R is array (0 .. 31) of Boolean
|
|
|
645 -- with Pack => True;
|
|
|
646 -- RR : R;
|
|
|
647 -- True : constant Boolean := False;
|
|
|
648
|
|
|
649 -- This is illegal because the visibility of True changes after the freeze
|
|
|
650 -- point, which is not allowed, and we need the delay mechanism to properly
|
|
|
651 -- diagnose this error.
|
|
|
652
|
|
|
653 Aspect_Delay : constant array (Aspect_Id) of Delay_Type :=
|
|
|
654 (No_Aspect => Always_Delay,
|
|
|
655 Aspect_Address => Always_Delay,
|
|
|
656 Aspect_All_Calls_Remote => Always_Delay,
|
|
|
657 Aspect_Asynchronous => Always_Delay,
|
|
|
658 Aspect_Attach_Handler => Always_Delay,
|
|
|
659 Aspect_Constant_Indexing => Always_Delay,
|
|
|
660 Aspect_CPU => Always_Delay,
|
|
|
661 Aspect_Default_Iterator => Always_Delay,
|
|
|
662 Aspect_Default_Storage_Pool => Always_Delay,
|
|
|
663 Aspect_Default_Value => Always_Delay,
|
|
|
664 Aspect_Default_Component_Value => Always_Delay,
|
|
|
665 Aspect_Discard_Names => Always_Delay,
|
|
|
666 Aspect_Dispatching_Domain => Always_Delay,
|
|
|
667 Aspect_Dynamic_Predicate => Always_Delay,
|
|
|
668 Aspect_Elaborate_Body => Always_Delay,
|
|
|
669 Aspect_External_Name => Always_Delay,
|
|
|
670 Aspect_External_Tag => Always_Delay,
|
|
|
671 Aspect_Favor_Top_Level => Always_Delay,
|
|
|
672 Aspect_Implicit_Dereference => Always_Delay,
|
|
|
673 Aspect_Independent => Always_Delay,
|
|
|
674 Aspect_Independent_Components => Always_Delay,
|
|
|
675 Aspect_Inline => Always_Delay,
|
|
|
676 Aspect_Inline_Always => Always_Delay,
|
|
|
677 Aspect_Input => Always_Delay,
|
|
|
678 Aspect_Interrupt_Handler => Always_Delay,
|
|
|
679 Aspect_Interrupt_Priority => Always_Delay,
|
|
|
680 Aspect_Invariant => Always_Delay,
|
|
|
681 Aspect_Iterable => Always_Delay,
|
|
|
682 Aspect_Iterator_Element => Always_Delay,
|
|
|
683 Aspect_Link_Name => Always_Delay,
|
|
|
684 Aspect_Linker_Section => Always_Delay,
|
|
|
685 Aspect_Lock_Free => Always_Delay,
|
|
|
686 Aspect_No_Inline => Always_Delay,
|
|
|
687 Aspect_No_Return => Always_Delay,
|
|
|
688 Aspect_Output => Always_Delay,
|
|
|
689 Aspect_Persistent_BSS => Always_Delay,
|
|
|
690 Aspect_Post => Always_Delay,
|
|
|
691 Aspect_Postcondition => Always_Delay,
|
|
|
692 Aspect_Pre => Always_Delay,
|
|
|
693 Aspect_Precondition => Always_Delay,
|
|
|
694 Aspect_Predicate => Always_Delay,
|
|
|
695 Aspect_Predicate_Failure => Always_Delay,
|
|
|
696 Aspect_Preelaborable_Initialization => Always_Delay,
|
|
|
697 Aspect_Preelaborate => Always_Delay,
|
|
|
698 Aspect_Priority => Always_Delay,
|
|
|
699 Aspect_Pure => Always_Delay,
|
|
|
700 Aspect_Pure_Function => Always_Delay,
|
|
|
701 Aspect_Read => Always_Delay,
|
|
|
702 Aspect_Relative_Deadline => Always_Delay,
|
|
|
703 Aspect_Remote_Access_Type => Always_Delay,
|
|
|
704 Aspect_Remote_Call_Interface => Always_Delay,
|
|
|
705 Aspect_Remote_Types => Always_Delay,
|
|
|
706 Aspect_Secondary_Stack_Size => Always_Delay,
|
|
|
707 Aspect_Shared => Always_Delay,
|
|
|
708 Aspect_Shared_Passive => Always_Delay,
|
|
|
709 Aspect_Simple_Storage_Pool => Always_Delay,
|
|
|
710 Aspect_Simple_Storage_Pool_Type => Always_Delay,
|
|
|
711 Aspect_Static_Predicate => Always_Delay,
|
|
|
712 Aspect_Storage_Pool => Always_Delay,
|
|
|
713 Aspect_Stream_Size => Always_Delay,
|
|
|
714 Aspect_Suppress => Always_Delay,
|
|
|
715 Aspect_Suppress_Debug_Info => Always_Delay,
|
|
|
716 Aspect_Suppress_Initialization => Always_Delay,
|
|
|
717 Aspect_Thread_Local_Storage => Always_Delay,
|
|
|
718 Aspect_Type_Invariant => Always_Delay,
|
|
|
719 Aspect_Unchecked_Union => Always_Delay,
|
|
|
720 Aspect_Universal_Aliasing => Always_Delay,
|
|
|
721 Aspect_Universal_Data => Always_Delay,
|
|
|
722 Aspect_Unmodified => Always_Delay,
|
|
|
723 Aspect_Unreferenced => Always_Delay,
|
|
|
724 Aspect_Unreferenced_Objects => Always_Delay,
|
|
|
725 Aspect_Unsuppress => Always_Delay,
|
|
|
726 Aspect_Variable_Indexing => Always_Delay,
|
|
|
727 Aspect_Write => Always_Delay,
|
|
|
728
|
|
|
729 Aspect_Abstract_State => Never_Delay,
|
|
|
730 Aspect_Annotate => Never_Delay,
|
|
|
731 Aspect_Async_Readers => Never_Delay,
|
|
|
732 Aspect_Async_Writers => Never_Delay,
|
|
|
733 Aspect_Constant_After_Elaboration => Never_Delay,
|
|
|
734 Aspect_Contract_Cases => Never_Delay,
|
|
|
735 Aspect_Convention => Never_Delay,
|
|
|
736 Aspect_Default_Initial_Condition => Never_Delay,
|
|
|
737 Aspect_Depends => Never_Delay,
|
|
|
738 Aspect_Dimension => Never_Delay,
|
|
|
739 Aspect_Dimension_System => Never_Delay,
|
|
|
740 Aspect_Disable_Controlled => Never_Delay,
|
|
|
741 Aspect_Effective_Reads => Never_Delay,
|
|
|
742 Aspect_Effective_Writes => Never_Delay,
|
|
|
743 Aspect_Export => Never_Delay,
|
|
|
744 Aspect_Extensions_Visible => Never_Delay,
|
|
|
745 Aspect_Ghost => Never_Delay,
|
|
|
746 Aspect_Global => Never_Delay,
|
|
|
747 Aspect_Import => Never_Delay,
|
|
|
748 Aspect_Initial_Condition => Never_Delay,
|
|
|
749 Aspect_Initializes => Never_Delay,
|
|
131
|
750 Aspect_Max_Entry_Queue_Depth => Never_Delay,
|
|
111
|
751 Aspect_Max_Queue_Length => Never_Delay,
|
|
|
752 Aspect_No_Elaboration_Code_All => Never_Delay,
|
|
|
753 Aspect_No_Tagged_Streams => Never_Delay,
|
|
|
754 Aspect_Obsolescent => Never_Delay,
|
|
|
755 Aspect_Part_Of => Never_Delay,
|
|
|
756 Aspect_Refined_Depends => Never_Delay,
|
|
|
757 Aspect_Refined_Global => Never_Delay,
|
|
|
758 Aspect_Refined_Post => Never_Delay,
|
|
|
759 Aspect_Refined_State => Never_Delay,
|
|
|
760 Aspect_SPARK_Mode => Never_Delay,
|
|
|
761 Aspect_Synchronization => Never_Delay,
|
|
|
762 Aspect_Test_Case => Never_Delay,
|
|
|
763 Aspect_Unimplemented => Never_Delay,
|
|
|
764 Aspect_Volatile_Function => Never_Delay,
|
|
|
765 Aspect_Warnings => Never_Delay,
|
|
|
766
|
|
|
767 Aspect_Alignment => Rep_Aspect,
|
|
|
768 Aspect_Atomic => Rep_Aspect,
|
|
|
769 Aspect_Atomic_Components => Rep_Aspect,
|
|
|
770 Aspect_Bit_Order => Rep_Aspect,
|
|
|
771 Aspect_Component_Size => Rep_Aspect,
|
|
|
772 Aspect_Machine_Radix => Rep_Aspect,
|
|
|
773 Aspect_Object_Size => Rep_Aspect,
|
|
|
774 Aspect_Pack => Rep_Aspect,
|
|
|
775 Aspect_Scalar_Storage_Order => Rep_Aspect,
|
|
|
776 Aspect_Size => Rep_Aspect,
|
|
|
777 Aspect_Small => Rep_Aspect,
|
|
|
778 Aspect_Storage_Size => Rep_Aspect,
|
|
|
779 Aspect_Value_Size => Rep_Aspect,
|
|
|
780 Aspect_Volatile => Rep_Aspect,
|
|
|
781 Aspect_Volatile_Components => Rep_Aspect,
|
|
|
782 Aspect_Volatile_Full_Access => Rep_Aspect);
|
|
|
783
|
|
|
784 ------------------------------------------------
|
|
|
785 -- Handling of Aspect Specifications on Stubs --
|
|
|
786 ------------------------------------------------
|
|
|
787
|
|
|
788 -- Aspects that appear on the following stub nodes
|
|
|
789
|
|
|
790 -- N_Package_Body_Stub
|
|
|
791 -- N_Protected_Body_Stub
|
|
|
792 -- N_Subprogram_Body_Stub
|
|
|
793 -- N_Task_Body_Stub
|
|
|
794
|
|
|
795 -- are treated as if they apply to the corresponding proper body. Their
|
|
|
796 -- analysis is postponed until the analysis of the proper body takes place
|
|
|
797 -- (see Analyze_Proper_Body). The delay is required because the analysis
|
|
|
798 -- may generate extra code which would be harder to relocate to the body.
|
|
|
799 -- If the proper body is present, the aspect specifications are relocated
|
|
|
800 -- to the corresponding body node:
|
|
|
801
|
|
|
802 -- N_Package_Body
|
|
|
803 -- N_Protected_Body
|
|
|
804 -- N_Subprogram_Body
|
|
|
805 -- N_Task_Body
|
|
|
806
|
|
|
807 -- The subsequent analysis takes care of the aspect-to-pragma conversions
|
|
|
808 -- and verification of pragma legality. In the case where the proper body
|
|
|
809 -- is not available, the aspect specifications are analyzed on the spot
|
|
|
810 -- (see Analyze_Proper_Body) to catch potential errors.
|
|
|
811
|
|
|
812 -- The following table lists all aspects that can apply to a subprogram
|
|
|
813 -- body [stub]. For instance, the following example is legal:
|
|
|
814
|
|
|
815 -- package P with SPARK_Mode ...;
|
|
|
816 -- package body P with SPARK_Mode is ...;
|
|
|
817
|
|
|
818 -- The table should be synchronized with Pragma_On_Body_Or_Stub_OK in unit
|
|
|
819 -- Sem_Prag.
|
|
|
820
|
|
|
821 Aspect_On_Body_Or_Stub_OK : constant array (Aspect_Id) of Boolean :=
|
|
|
822 (Aspect_Refined_Depends => True,
|
|
|
823 Aspect_Refined_Global => True,
|
|
|
824 Aspect_Refined_Post => True,
|
|
|
825 Aspect_SPARK_Mode => True,
|
|
|
826 Aspect_Warnings => True,
|
|
|
827 others => False);
|
|
|
828
|
|
|
829 -------------------------------------------------------------------
|
|
|
830 -- Handling of Aspects Specifications on Single Concurrent Types --
|
|
|
831 -------------------------------------------------------------------
|
|
|
832
|
|
|
833 -- Certain aspects that appear on the following nodes
|
|
|
834
|
|
|
835 -- N_Single_Protected_Declaration
|
|
|
836 -- N_Single_Task_Declaration
|
|
|
837
|
|
|
838 -- are treated as if they apply to the anonymous object produced by the
|
|
|
839 -- analysis of a single concurrent type. The following table lists all
|
|
|
840 -- aspects that should apply to the anonymous object. The table should
|
|
|
841 -- be synchronized with Pragma_On_Anonymous_Object_OK in unit Sem_Prag.
|
|
|
842
|
|
|
843 Aspect_On_Anonymous_Object_OK : constant array (Aspect_Id) of Boolean :=
|
|
|
844 (Aspect_Depends => True,
|
|
|
845 Aspect_Global => True,
|
|
|
846 Aspect_Part_Of => True,
|
|
|
847 others => False);
|
|
|
848
|
|
|
849 ---------------------------------------------------
|
|
|
850 -- Handling of Aspect Specifications in the Tree --
|
|
|
851 ---------------------------------------------------
|
|
|
852
|
|
|
853 -- Several kinds of declaration node permit aspect specifications in Ada
|
|
|
854 -- 2012 mode. If there was room in all the corresponding declaration nodes,
|
|
|
855 -- we could just have a field Aspect_Specifications pointing to a list of
|
|
|
856 -- nodes for the aspects (N_Aspect_Specification nodes). But there isn't
|
|
|
857 -- room, so we adopt a different approach.
|
|
|
858
|
|
|
859 -- The following subprograms provide access to a specialized interface
|
|
|
860 -- implemented internally with a hash table in the body, that provides
|
|
|
861 -- access to aspect specifications.
|
|
|
862
|
|
|
863 function Aspect_Specifications (N : Node_Id) return List_Id;
|
|
|
864 -- Given a node N, returns the list of N_Aspect_Specification nodes that
|
|
|
865 -- are attached to this declaration node. If the node is in the class of
|
|
|
866 -- declaration nodes that permit aspect specifications, as defined by the
|
|
|
867 -- predicate above, and if their Has_Aspects flag is set to True, then this
|
|
|
868 -- will always be a non-empty list. If this flag is set to False, then
|
|
|
869 -- No_List is returned. Normally, the only nodes that have Has_Aspects set
|
|
|
870 -- True are the nodes for which Permits_Aspect_Specifications would return
|
|
|
871 -- True (i.e. the declaration nodes defined in the RM as permitting the
|
|
|
872 -- presence of Aspect_Specifications). However, it is possible for the
|
|
|
873 -- flag Has_Aspects to be set on other nodes as a result of Rewrite and
|
|
|
874 -- Replace calls, and this function may be used to retrieve the aspect
|
|
|
875 -- specifications for the original rewritten node in such cases.
|
|
|
876
|
|
|
877 function Aspects_On_Body_Or_Stub_OK (N : Node_Id) return Boolean;
|
|
|
878 -- N denotes a body [stub] with aspects. Determine whether all aspects of N
|
|
|
879 -- are allowed to appear on a body [stub].
|
|
|
880
|
|
|
881 procedure Exchange_Aspects (N1 : Node_Id; N2 : Node_Id);
|
|
|
882 -- Exchange the aspect specifications of two nodes. If either node lacks an
|
|
|
883 -- aspect specification list, the routine has no effect. It is assumed that
|
|
|
884 -- both nodes can support aspects.
|
|
|
885
|
|
|
886 function Find_Aspect (Id : Entity_Id; A : Aspect_Id) return Node_Id;
|
|
|
887 -- Find the aspect specification of aspect A associated with entity I.
|
|
|
888 -- Return Empty if Id does not have the requested aspect.
|
|
|
889
|
|
|
890 function Find_Value_Of_Aspect
|
|
|
891 (Id : Entity_Id;
|
|
|
892 A : Aspect_Id) return Node_Id;
|
|
|
893 -- Find the value of aspect A associated with entity Id. Return Empty if
|
|
|
894 -- Id does not have the requested aspect.
|
|
|
895
|
|
|
896 function Has_Aspect (Id : Entity_Id; A : Aspect_Id) return Boolean;
|
|
|
897 -- Determine whether entity Id has aspect A
|
|
|
898
|
|
|
899 procedure Move_Aspects (From : Node_Id; To : Node_Id);
|
|
|
900 -- Relocate the aspect specifications of node From to node To. On entry it
|
|
|
901 -- is assumed that To does not have aspect specifications. If From has no
|
|
|
902 -- aspects, the routine has no effect.
|
|
|
903
|
|
|
904 procedure Move_Or_Merge_Aspects (From : Node_Id; To : Node_Id);
|
|
|
905 -- Relocate the aspect specifications of node From to node To. If To has
|
|
|
906 -- aspects, the aspects of From are appended to the aspects of To. If From
|
|
|
907 -- has no aspects, the routine has no effect. Special behavior:
|
|
|
908 -- * When node From denotes a subprogram body stub without a previous
|
|
|
909 -- declaration, the only aspects relocated to node To are those found
|
|
|
910 -- in table Aspect_On_Body_Or_Stub_OK.
|
|
|
911 -- * When node From denotes a single synchronized type declaration, the
|
|
|
912 -- only aspects relocated to node To are those found in table
|
|
|
913 -- Aspect_On_Anonymous_Object_OK.
|
|
|
914
|
|
|
915 function Permits_Aspect_Specifications (N : Node_Id) return Boolean;
|
|
|
916 -- Returns True if the node N is a declaration node that permits aspect
|
|
|
917 -- specifications in the grammar. It is possible for other nodes to have
|
|
|
918 -- aspect specifications as a result of Rewrite or Replace calls.
|
|
|
919
|
|
|
920 procedure Remove_Aspects (N : Node_Id);
|
|
|
921 -- Delete the aspect specifications associated with node N. If the node has
|
|
|
922 -- no aspects, the routine has no effect.
|
|
|
923
|
|
|
924 function Same_Aspect (A1 : Aspect_Id; A2 : Aspect_Id) return Boolean;
|
|
|
925 -- Returns True if A1 and A2 are (essentially) the same aspect. This is not
|
|
|
926 -- a simple equality test because e.g. Post and Postcondition are the same.
|
|
|
927 -- This is used for detecting duplicate aspects.
|
|
|
928
|
|
|
929 procedure Set_Aspect_Specifications (N : Node_Id; L : List_Id);
|
|
|
930 -- The node N must be in the class of declaration nodes that permit aspect
|
|
|
931 -- specifications and the Has_Aspects flag must be False on entry. L must
|
|
|
932 -- be a non-empty list of N_Aspect_Specification nodes. This procedure sets
|
|
|
933 -- the Has_Aspects flag to True, and makes an entry that can be retrieved
|
|
|
934 -- by a subsequent Aspect_Specifications call. It is an error to call this
|
|
|
935 -- procedure with a node that does not permit aspect specifications, or a
|
|
|
936 -- node that has its Has_Aspects flag set True on entry, or with L being an
|
|
|
937 -- empty list or No_List.
|
|
|
938
|
|
|
939 procedure Tree_Read;
|
|
|
940 -- Reads contents of Aspect_Specifications hash table from the tree file
|
|
|
941
|
|
|
942 procedure Tree_Write;
|
|
|
943 -- Writes contents of Aspect_Specifications hash table to the tree file
|
|
|
944
|
|
|
945 end Aspects;
|
