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1 -- CC70C01.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 a generic formal package is an instance. Specifically,
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28 -- check that a generic formal package may be passed as an actual
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29 -- parameter in an instantiation of a generic package. Check that the
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30 -- visible part of the generic formal package includes the first list of
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31 -- basic declarative items of the package specification.
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32 --
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33 -- TEST DESCRIPTION:
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34 -- A generic formal package is a package, and is an instance.
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35 --
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36 -- Declare a list type in a generic package for lists of elements of any
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37 -- nonlimited type (foundation code). Declare a second generic package
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38 -- which declares operations for the list type, and parameterize it with
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39 -- a generic formal package with the list-type package as template
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40 -- (foundation code). Declare a third generic package which declares
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41 -- additional operations for the list type, and parameterize it just like
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42 -- the second generic package. Declare an instance of the second generic
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43 -- in the spec of the third generic, passing the formal package as the
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44 -- actual.
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45 --
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46 -- TEST FILES:
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47 -- The following files comprise this test:
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48 --
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49 -- FC70C00.A
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50 -- CC70C01.A
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51 --
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52 --
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53 -- CHANGE HISTORY:
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54 -- 06 Dec 94 SAIC ACVC 2.0
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55 --
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56 --!
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57
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58 with FC70C00_0; -- List abstraction.
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59 with FC70C00_1; -- Basic list operations.
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60 generic
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61 with package Lists is new FC70C00_0 (<>);
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62 package CC70C01_0 is -- Additional list operations.
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63
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64 -- Instantiate a generic package (FC70C00_1) with a generic formal package
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65 -- (Lists). This ensures that the package passed as an actual corresponding
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66 -- to Lists is the same one passed as an actual to FC70C00_1. Thus, all list
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67 -- operations from both FC70C00_1 and this package operate on lists of the
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68 -- same element type.
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69
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70 package Basic_List_Ops is new FC70C00_1 (Lists);
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71
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72
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73 End_of_List_Reached : exception;
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74
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75
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76 -- Read from current element and advance "current" pointer.
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77 procedure Read_Element (L : in out Lists.List_Type;
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78 E : out Lists.Element_Type);
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79
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80 -- Add element to end of list.
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81 procedure Add_Element (L : in out Lists.List_Type;
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82 E : in Lists.Element_Type);
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83
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84 end CC70C01_0;
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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
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90 package body CC70C01_0 is
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91
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92 procedure Read_Element (L : in out Lists.List_Type;
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93 E : out Lists.Element_Type) is
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94 begin
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95 if Basic_List_Ops.End_Of_List (L) then -- Use of op from the previous
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96 raise End_Of_List_Reached; -- generic package.
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97 else
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98 E := L.Current.Item; -- Retrieve current element.
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99 L.Current := L.Current.Next; -- Advance "current" pointer.
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100 end if;
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101 end Read_Element;
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102
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103
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104 procedure Add_Element (L : in out Lists.List_Type;
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105 E : in Lists.Element_Type) is
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106 New_Node : Lists.Node_Pointer := new Lists.Node_Type'(E, null);
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107 use type Lists.Node_Pointer;
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108 begin
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109 if L.First = null then -- No elements in list, so add new
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110 L.First := New_Node; -- element at beginning of list.
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111 else
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112 L.Last.Next := New_Node; -- Add new element at end of list.
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113 end if;
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114 L.Last := New_Node; -- Set last-in-list pointer.
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115 end Add_Element;
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116
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117
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118 end CC70C01_0;
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119
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120
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121 --==================================================================--
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122
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123
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124 with FC70C00_0; -- Generic list abstraction.
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125 with CC70C01_0; -- Additional generic list operations.
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126
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127 with Report;
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128 procedure CC70C01 is
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129
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130 type Points is range 0 .. 100; -- Discrete type.
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131
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132 package Lists_of_Points is new FC70C00_0 (Points); -- Points lists.
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133
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134 package Points_List_Ops is new -- Points-list ops.
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135 CC70C01_0 (Lists_Of_Points);
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136
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137 Scores : Lists_of_Points.List_Type; -- List of points.
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138
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139
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140 -- Begin test code declarations: -----------------------
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141
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142 type TC_Score_Array is array (1 .. 3) of Points;
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143
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144 TC_List_Values : constant TC_Score_Array := (23, 15, 0);
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145
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146 TC_Correct_List_Values : Boolean := False;
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147
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148
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149 procedure TC_Initialize_List (L : in out Lists_Of_Points.List_Type) is
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150 begin -- Initial list contains 3 scores
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151 for I in TC_Score_Array'Range loop -- with the values 23, 15, and 0.
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152 Points_List_Ops.Add_Element (L, TC_List_Values(I));
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153 end loop;
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154 end TC_Initialize_List;
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155
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156
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157 procedure TC_Verify_List (L : in out Lists_Of_Points.List_Type;
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158 Expected : in TC_Score_Array;
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159 OK : out Boolean) is
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160 Actual : TC_Score_Array;
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161 begin
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162 Points_List_Ops.Basic_List_Ops.Reset (L);
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163 for I in TC_Score_Array'Range loop
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164 Points_List_Ops.Read_Element (L, Actual(I));
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165 end loop;
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166 OK := (Actual = Expected);
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167 end TC_Verify_List;
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168
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169 -- End test code declarations. -------------------------
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170
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171
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172 begin
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173
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174 Report.Test ("CC70C01", "Check that a generic formal package may be " &
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175 "passed as an actual in an instantiation of a generic " &
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176 "package");
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177
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178 TC_Initialize_List (Scores);
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179 TC_Verify_List (Scores, TC_List_Values, TC_Correct_List_Values);
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180
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181 if not TC_Correct_List_Values then
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182 Report.Failed ("List contains incorrect values");
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183 end if;
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184
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185 Report.Result;
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186
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187 end CC70C01;
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