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1 -- CC51004.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 tagged 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 tagged 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 -- tagged 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 -- tagged parameter. In the main program, declare tagged record objects
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41 -- with two different discriminant values. Derive an indefinite type from
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42 -- the tagged type with a new discriminant part. Instantiate the
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43 -- generic subprogram for the root tagged subtype and the derived subtype.
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44 -- Call the root subtype instance with actual parameters having the two
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45 -- discriminant values. Also call the derived subtype instance with an
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46 -- 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 -- 05 Jan 94 SAIC Removed unknown discriminant part from formal
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52 -- derived type. Moved declaration of type
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53 -- New_Dbl_Sq from main subprogram to CC51004_0.
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54 -- 05 Nov 95 SAIC ACVC 2.0.1 fixes: Removed constrained subtype
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55 -- instantiation and associated declarations.
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56 -- Modified commentary.
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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 CC51004_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 Sq_Type (Num1 : Natural) is tagged record
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71 One : Square (Num1);
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72 end record;
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73
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74 -- Extended type with new discriminant part (which constrains parent):
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75
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76 type New_Dbl_Sq (Num2 : Natural) is new Sq_Type(Num2) with record
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77 Two : Square (Num2);
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78 end record;
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79
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80 end CC51004_0;
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81
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82
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83 -- No body for CC51004_0;
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84
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85
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86 --==================================================================--
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87
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88
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89 with CC51004_0; -- Matrix types.
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90 generic -- Generic matrix "clear" operation.
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91 type Squares is new CC51004_0.Sq_Type with private; -- Indefinite
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92 procedure CC51004_1 (Sq : in out Squares); -- formal.
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93
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94
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95 --==================================================================--
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96
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97
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98 procedure CC51004_1 (Sq : in out Squares) is
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99 begin
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100 for I in 1 .. Sq.Num1 loop -- Discriminants inherited from ancestor
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101 for J in 1 .. Sq.Num1 loop -- type (should work even for derived type
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102 -- declaring new discriminant part).
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103 Sq.One.Mat (I, J) := 0; -- Other components inherited from
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104 -- ancestor type.
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105 end loop;
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106 end loop;
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107 end CC51004_1;
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108
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109
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110 --==================================================================--
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111
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112
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113 with CC51004_0; -- Matrix types.
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114 with CC51004_1; -- Generic double-matrix "clear" operation.
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115
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116 with Report;
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117 procedure CC51004 is
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118
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119 use CC51004_0; -- "/=" operator directly visible for Sq_Type.
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120
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121 -- Matrices of root type:
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122
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123 Mat_2x2 : Square(Side => 2) := (Side => 2, Mat => ( (1, 2), (3, 4) ));
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124 One_Mat_2x2 : Sq_Type(Num1 => 2) := (2, Mat_2x2);
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125
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126 Zero_2x2 : constant Square(2) := (2, Mat => ( (0, 0), (0, 0) ));
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127 Expected_2x2 : constant Sq_Type(2) := (Num1 => 2, One => Zero_2x2);
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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 => (5, 2, 7),
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132 others => (1 => 4,
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133 others => 9)));
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134 One_Mat_3x3 : Sq_Type(3) := (Num1 => 3, One => Mat_3x3);
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135
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136 Zero_3x3 : constant Square(3) := (3, Mat => (others => (0,0,0)));
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137 Expected_3x3 : constant Sq_Type(Num1 => 3) := (3, Zero_3x3);
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138
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139
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140 New_Dbl_2x2 : New_Dbl_Sq(Num2 => 2) := (2, others => Mat_2x2);
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141 Expected_New_2x2 : constant New_Dbl_Sq := (2, Zero_2x2, Mat_2x2);
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142
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143
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144
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145 -- Instantiations:
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146
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147 procedure Clr_Mat is new CC51004_1 (Sq_Type);
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148 procedure Clr_New_Dbl is new CC51004_1 (New_Dbl_Sq);
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149
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150
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151 begin
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152 Report.Test ("CC51004", "Check that a formal derived tagged type " &
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153 "inherits components, including discriminants, " &
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154 "from its ancestor type");
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155
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156 -- Simulate use of matrix manipulation operations.
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157
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158
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159 Clr_Mat (One_Mat_2x2);
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160
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161 if (One_Mat_2x2 /= Expected_2x2) then
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162 Report.Failed ("Wrong result root type (2x2 matrix)");
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163 end if;
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164
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165
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166 Clr_Mat (One_Mat_3x3);
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167
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168 if (One_Mat_3x3 /= Expected_3x3) then
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169 Report.Failed ("Wrong result root type (3x3 matrix)");
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170 end if;
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171
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172
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173 Clr_New_Dbl (New_Dbl_2x2);
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174
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175 if (New_Dbl_2x2 /= Expected_New_2x2) then
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176 Report.Failed ("Wrong result extended type (2x2 matrix)");
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177 end if;
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178
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179
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180 Report.Result;
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181 end CC51004;
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