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111
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1 -- CC51003.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 if the ancestor type of a formal derived type is a composite
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28 -- type that is not an array type, the formal type inherits components,
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29 -- including discriminants, from the ancestor type.
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30 --
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31 -- Check for the case where the ancestor type is a record type, and the
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32 -- formal derived type is declared in a generic subprogram.
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33 --
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34 -- TEST DESCRIPTION:
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35 -- Define a discriminated record type in a package. Declare a
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36 -- library-level generic subprogram with a formal derived type using the
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37 -- record type as ancestor. Give the generic subprogram an in out
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38 -- parameter of the formal derived type. Inside the generic, use the
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39 -- discriminant component and modify the remaining components of the
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40 -- record parameter. In the main program, declare record objects with two
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41 -- different discriminant values. Derive an indefinite type from the
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42 -- record type with a new discriminant part. Instantiate the generic
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43 -- subprogram for the root record subtype and the derived subtype. Call
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44 -- the root subtype instance with actual parameters having the two
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45 -- discriminant values. Also call the derived subtype instance with
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46 -- an appropriate actual.
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47 --
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48 --
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49 -- CHANGE HISTORY:
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50 -- 06 Dec 94 SAIC ACVC 2.0
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51 -- 03 Jan 95 SAIC Removed unknown discriminant part from formal
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52 -- derived type.
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53 -- 05 Nov 95 SAIC ACVC 2.0.1 fixes: Removed constrained subtype
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54 -- instantiation and associated declarations.
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55 -- Modified commentary.
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56 --
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57 --!
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58
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59
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60 -- Simulate a fragment of a matrix manipulation application.
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61
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62 package CC51003_0 is -- Matrix types.
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63
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64 type Matrix is array (Natural range <>, Natural range <>) of Integer;
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65
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66 type Square (Side : Natural) is record
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67 Mat : Matrix (1 .. Side, 1 .. Side);
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68 end record;
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69
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70 type Double_Square (Number : Natural) is record
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71 Left : Square (Number);
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72 Right : Square (Number);
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73 end record;
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74
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75 end CC51003_0;
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76
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77
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78 -- No body for CC51003_0;
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79
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80
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81 --==================================================================--
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82
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83
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84 with CC51003_0; -- Matrix types.
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85 generic -- Generic double-matrix "clear" operation.
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86 type Dbl_Square is new CC51003_0.Double_Square; -- Indefinite
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87 procedure CC51003_1 (Dbl : in out Dbl_Square); -- formal.
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88
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89
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90 --==================================================================--
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91
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92
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93 procedure CC51003_1 (Dbl : in out Dbl_Square) is
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94 begin
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95 for I in 1 .. Dbl.Number loop -- Discriminants inherited from ancestor
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96 for J in 1 .. Dbl.Number loop -- type (should work even for derived type
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97 -- declaring new discriminant part).
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98 Dbl.Left.Mat (I, J) := 0; -- Other components inherited from
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99 Dbl.Right.Mat (I, J) := 0; -- ancestor type.
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100
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101 end loop;
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102 end loop;
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103 end CC51003_1;
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104
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105
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106 --==================================================================--
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107
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108
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109 with CC51003_0; -- Matrix types.
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110 with CC51003_1; -- Generic double-matrix "clear" operation.
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111
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112 with Report;
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113 procedure CC51003 is
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114
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115 use CC51003_0; -- "/=" operator directly visible for Double_Square.
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116
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117 -- Matrices of root type:
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118
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119 Mat_2x2 : Square(Side => 2) := (Side => 2,
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120 Mat => ( (1, 2), (3, 4) ));
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121 Dbl_Mat_2x2 : Double_Square(Number => 2) := (2, Mat_2x2, Mat_2x2);
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122
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123
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124 Zero_2x2 : constant Square(2) := (2, Mat => ( (0, 0), (0, 0) ));
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125 Expected_2x2 : constant Double_Square(2) := (Number => 2,
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126 others => Zero_2x2);
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127
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128
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129
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130 Mat_3x3 : Square(Side => 3) := (Side => 3,
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131 Mat => (1 => (1, 4, 9),
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132 others => (1 => 5,
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133 others => 7)));
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134 Dbl_Mat_3x3 : Double_Square(3) := (Number => 3, others => Mat_3x3);
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135
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136
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137 Zero_3x3 : constant Square(3) := (3, Mat => (others => (0,0,0)));
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138 Expected_3x3 : constant Double_Square(Number => 3) :=
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139 (3, Zero_3x3, Zero_3x3);
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140
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141
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142 -- Derived type with new discriminant part (which constrains parent):
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143
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144 type New_Dbl_Sq (Num : Natural) is new Double_Square(Num);
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145
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146 New_Dbl_2x2 : New_Dbl_Sq (Num => 2) := (2, Mat_2x2, Mat_2x2);
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147 Expected_New_2x2 : constant New_Dbl_Sq := (Num => 2, others => Zero_2x2);
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148
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149
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150
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151 -- Instantiations:
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152
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153 procedure Clr_Dbl is new CC51003_1 (Double_Square);
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154 procedure Clr_New_Dbl is new CC51003_1 (New_Dbl_Sq);
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155
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156
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157 begin
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158 Report.Test ("CC51003", "Check that a formal derived record type " &
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159 "inherits components, including discriminants, " &
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160 "from its ancestor type");
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161
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162 -- Simulate use of matrix manipulation operations.
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163
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164 Clr_Dbl (Dbl_Mat_2x2);
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165
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166 if (Dbl_Mat_2x2 /= Expected_2x2) then
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167 Report.Failed ("Wrong result for root type (2x2 matrix)");
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168 end if;
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169
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170
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171 Clr_Dbl (Dbl_Mat_3x3);
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172
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173 if (Dbl_Mat_3x3 /= Expected_3x3) then
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174 Report.Failed ("Wrong result for root type (3x3 matrix)");
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175 end if;
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176
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177
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178 Clr_New_Dbl (New_Dbl_2x2);
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179
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180 if (New_Dbl_2x2 /= Expected_New_2x2) then
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181 Report.Failed ("Wrong result for derived type (2x2 matrix)");
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182 end if;
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183
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184
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185 Report.Result;
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186
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187 end CC51003;
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