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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 -- E X P _ S E L --
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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) 1992-2018, 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. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- Routines used in Chapter 9 for the expansion of dispatching triggers in
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27 -- select statements (Ada 2005: AI-345)
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28
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29 with Types; use Types;
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30
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31 package Exp_Sel is
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32
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33 function Build_Abort_Block
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34 (Loc : Source_Ptr;
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35 Abr_Blk_Ent : Entity_Id;
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36 Cln_Blk_Ent : Entity_Id;
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37 Blk : Node_Id) return Node_Id;
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38 -- Generate:
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39 -- begin
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40 -- Blk
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41 -- exception
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42 -- when Abort_Signal => Abort_Undefer / null;
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43 -- end;
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44 -- Abr_Blk_Ent is the name of the generated block, Cln_Blk_Ent is the name
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45 -- of the encapsulated cleanup block, Blk is the actual block name.
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46 -- The exception handler code is built by Build_Abort_Block_Handler.
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47
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48 function Build_Abort_Block_Handler (Loc : Source_Ptr) return Node_Id;
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49 -- Generate if front-end exception:
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50 -- when others =>
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51 -- Abort_Undefer;
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52 -- or if back-end exception:
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53 -- when others =>
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54 -- null;
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55 -- This is an exception handler to stop propagation of aborts, without
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56 -- modifying the deferal level.
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57
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58 function Build_B
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59 (Loc : Source_Ptr;
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60 Decls : List_Id) return Entity_Id;
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61 -- Generate:
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62 -- B : Boolean := False;
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63 -- Append the object declaration to the list and return its defining
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64 -- identifier.
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65
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66 function Build_C
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67 (Loc : Source_Ptr;
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68 Decls : List_Id) return Entity_Id;
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69 -- Generate:
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70 -- C : Ada.Tags.Prim_Op_Kind;
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71 -- Append the object declaration to the list and return its defining
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72 -- identifier.
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73
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74 function Build_Cleanup_Block
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75 (Loc : Source_Ptr;
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76 Blk_Ent : Entity_Id;
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77 Stmts : List_Id;
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78 Clean_Ent : Entity_Id) return Node_Id;
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79 -- Generate:
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80 -- declare
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81 -- procedure _clean is
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82 -- begin
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83 -- ...
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84 -- end _clean;
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85 -- begin
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86 -- Stmts
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87 -- at end
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88 -- _clean;
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89 -- end;
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90 -- Blk_Ent is the name of the generated block, Stmts is the list of
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91 -- encapsulated statements and Clean_Ent is the parameter to the
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92 -- _clean procedure.
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93
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94 function Build_K
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95 (Loc : Source_Ptr;
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96 Decls : List_Id;
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97 Obj : Entity_Id) return Entity_Id;
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98 -- Generate
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99 -- K : Ada.Tags.Tagged_Kind :=
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100 -- Ada.Tags.Get_Tagged_Kind (Ada.Tags.Tag (Obj));
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101 -- where Obj is the pointer to a secondary table. Append the object
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102 -- declaration to the list and return its defining identifier.
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103
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104 function Build_S
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105 (Loc : Source_Ptr;
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106 Decls : List_Id) return Entity_Id;
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107 -- Generate:
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108 -- S : Integer;
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109 -- Append the object declaration to the list and return its defining
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110 -- identifier.
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111
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112 function Build_S_Assignment
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113 (Loc : Source_Ptr;
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114 S : Entity_Id;
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115 Obj : Entity_Id;
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116 Call_Ent : Entity_Id) return Node_Id;
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117 -- Generate:
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118 -- S := Ada.Tags.Get_Offset_Index (
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119 -- Ada.Tags.Tag (Obj), DT_Position (Call_Ent));
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120 -- where Obj is the pointer to a secondary table, Call_Ent is the entity
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121 -- of the dispatching call name. Return the generated assignment.
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122
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123 end Exp_Sel;
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