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1 -- C760007.A
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2 --
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 --
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26 -- OBJECTIVE:
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27 -- Check that Adjust is called for the execution of a return
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28 -- statement for a function returning a result of a (non-limited)
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29 -- controlled type.
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30 --
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31 -- Check that Adjust is called when evaluating an aggregate
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32 -- component association for a controlled component.
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33 --
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34 -- Check that Adjust is called for the assignment of the ancestor
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35 -- expression of an extension aggregate when the type of the
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36 -- aggregate is controlled.
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37 --
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38 -- TEST DESCRIPTION:
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39 -- A type is derived from Ada.Finalization.Controlled; the dispatching
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40 -- procedure Adjust is defined for the new type. Structures and
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41 -- subprograms to model the test objectives are used to check that
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42 -- Adjust is called at the right time. For the sake of simplicity,
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43 -- globally accessible data is used to check that the calls are made.
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44 --
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45 --
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46 -- CHANGE HISTORY:
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47 -- 06 DEC 94 SAIC ACVC 2.0
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48 -- 14 OCT 95 SAIC Update and repair for ACVC 2.0.1
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49 -- 05 APR 96 SAIC Add RM reference
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50 -- 06 NOV 96 SAIC Reduce adjust requirement
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51 -- 25 NOV 97 EDS Allowed zero calls to adjust at line 144
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52 --!
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53
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54 ---------------------------------------------------------------- C760007_0
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55
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56 with Ada.Finalization;
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57 package C760007_0 is
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58
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59 type Controlled is new Ada.Finalization.Controlled with record
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60 TC_ID : Natural := Natural'Last;
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61 end record;
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62 procedure Adjust( Object: in out Controlled );
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63
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64 type Structure is record
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65 Controlled_Component : Controlled;
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66 end record;
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67
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68 type Child is new Controlled with record
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69 TC_XX : Natural := Natural'Last;
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70 end record;
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71 procedure Adjust( Object: in out Child );
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72
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73 Adjust_Count : Natural := 0;
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74 Child_Adjust_Count : Natural := 0;
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75
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76 end C760007_0;
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77
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78 package body C760007_0 is
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79
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80 procedure Adjust( Object: in out Controlled ) is
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81 begin
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82 Adjust_Count := Adjust_Count +1;
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83 end Adjust;
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84
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85 procedure Adjust( Object: in out Child ) is
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86 begin
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87 Child_Adjust_Count := Child_Adjust_Count +1;
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88 end Adjust;
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89
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90 end C760007_0;
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91
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92 ------------------------------------------------------------------ C760007
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93
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94 with Report;
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95 with C760007_0;
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96 procedure C760007 is
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97
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98 procedure Check_Adjust_Count(Message: String;
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99 Min: Natural := 1;
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100 Max: Natural := 2) is
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101 begin
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102
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103 -- in order to allow for the anonymous objects referred to in
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104 -- the reference manual, the check for calls to Adjust must be
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105 -- in a range. This number must then be further adjusted
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106 -- to allow for the optimization that does not call for an adjust
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107 -- of an aggregate initial value built directly in the object
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108
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109 if C760007_0.Adjust_Count not in Min..Max then
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110 Report.Failed(Message
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111 & " = " & Natural'Image(C760007_0.Adjust_Count));
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112 end if;
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113 C760007_0.Adjust_Count := 0;
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114 end Check_Adjust_Count;
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115
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116 procedure Check_Child_Adjust_Count(Message: String;
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117 Min: Natural := 1;
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118 Max: Natural := 2) is
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119 begin
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120 -- ditto above
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121
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122 if C760007_0.Child_Adjust_Count not in Min..Max then
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123 Report.Failed(Message
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124 & " = " & Natural'Image(C760007_0.Child_Adjust_Count));
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125 end if;
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126 C760007_0.Child_Adjust_Count := 0;
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127 end Check_Child_Adjust_Count;
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128
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129 Object : C760007_0.Controlled;
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130
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131 -- Check that Adjust is called for the execution of a return
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132 -- statement for a function returning a result of a (non-limited)
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133 -- controlled type or a result of a noncontrolled type with
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134 -- controlled components.
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135
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136 procedure Subtest_1 is
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137 function Create return C760007_0.Controlled is
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138 New_Object : C760007_0.Controlled;
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139 begin
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140 return New_Object;
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141 end Create;
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142
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143 procedure Examine( Thing : in C760007_0.Controlled ) is
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144 begin
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145 Check_Adjust_Count("Function call passed as parameter",0);
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146 end Examine;
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147
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148 begin
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149 -- this assignment must call Adjust:
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150 -- 1: on the value resulting from the function
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151 -- ** unless this is optimized out by building the result directly
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152 -- in the target object.
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153 -- 2: on Object once it's been assigned
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154 -- may call adjust
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155 -- 1: for a anonymous object created in the evaluation of the function
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156 -- 2: for a anonymous object created in the assignment operation
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157
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158 Object := Create;
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159
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160 Check_Adjust_Count("Function call",1,4);
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161
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162 Examine( Create );
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163
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164 end Subtest_1;
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165
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166 -- Check that Adjust is called when evaluating an aggregate
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167 -- component association for a controlled component.
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168
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169 procedure Subtest_2 is
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170 S : C760007_0.Structure;
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171
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172 procedure Examine( Thing : in C760007_0.Structure ) is
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173 begin
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174 Check_Adjust_Count("Aggregate passed as parameter");
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175 end Examine;
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176
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177 begin
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178 -- this assignment must call Adjust:
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179 -- 1: on the value resulting from the aggregate
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180 -- ** unless this is optimized out by building the result directly
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181 -- in the target object.
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182 -- 2: on Object once it's been assigned
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183 -- may call adjust
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184 -- 1: for a anonymous object created in the evaluation of the aggregate
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185 -- 2: for a anonymous object created in the assignment operation
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186 S := ( Controlled_Component => Object );
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187 Check_Adjust_Count("Aggregate and Assignment", 1, 4);
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188
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189 Examine( C760007_0.Structure'(Controlled_Component => Object) );
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190 end Subtest_2;
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191
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192 -- Check that Adjust is called for the assignment of the ancestor
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193 -- expression of an extension aggregate when the type of the
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194 -- aggregate is controlled.
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195
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196 procedure Subtest_3 is
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197 Bambino : C760007_0.Child;
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198
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199 procedure Examine( Thing : in C760007_0.Child ) is
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200 begin
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201 Check_Adjust_Count("Extension aggregate as parameter (ancestor)", 0, 2);
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202 Check_Child_Adjust_Count("Extension aggregate as parameter", 0, 4);
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203 end Examine;
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204
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205 begin
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206 -- implementation permissions make all of the following calls to adjust
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207 -- optional:
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208 -- these assignments may call Adjust:
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209 -- 1: on the value resulting from the aggregate
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210 -- 2: on Object once it's been assigned
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211 -- 3: for a anonymous object created in the evaluation of the aggregate
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212 -- 4: for a anonymous object created in the assignment operation
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213 Bambino := ( Object with TC_XX => 10 );
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214 Check_Adjust_Count("Ancestor (expression) part of aggregate", 0, 2);
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215 Check_Child_Adjust_Count("Child aggregate assignment 1", 0, 4 );
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216
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217 Bambino := ( C760007_0.Controlled with TC_XX => 11 );
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218 Check_Adjust_Count("Ancestor (subtype_mark) part of aggregate", 0, 2);
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219 Check_Child_Adjust_Count("Child aggregate assignment 2", 0, 4 );
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220
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221 Examine( ( Object with TC_XX => 21 ) );
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222
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223 Examine( ( C760007_0.Controlled with TC_XX => 37 ) );
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224
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225 end Subtest_3;
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226
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227 begin -- Main test procedure.
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228
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229 Report.Test ("C760007", "Check that Adjust is called for the " &
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230 "execution of a return statement for a " &
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231 "function returning a result containing a " &
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232 "controlled type. Check that Adjust is " &
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233 "called when evaluating an aggregate " &
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234 "component association for a controlled " &
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235 "component. " &
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236 "Check that Adjust is called for the " &
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237 "assignment of the ancestor expression of an " &
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238 "extension aggregate when the type of the " &
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239 "aggregate is controlled" );
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240
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241 Subtest_1;
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242 Subtest_2;
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243 Subtest_3;
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244
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245 Report.Result;
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246
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247 end C760007;
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