gdb/ada-exp.h

   1 /* Definitions for Ada expressions
   2
   3    Copyright (C) 2020 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef ADA_EXP_H
  21 #define ADA_EXP_H
  22
  23 #include "expop.h"
  24
  25 extern struct value *ada_unop_neg (struct type *expect_type,
  26                                    struct expression *exp,
  27                                    enum noside noside, enum exp_opcode op,
  28                                    struct value *arg1);
  29 extern struct value *ada_atr_tag (struct type *expect_type,
  30                                   struct expression *exp,
  31                                   enum noside noside, enum exp_opcode op,
  32                                   struct value *arg1);
  33 extern struct value *ada_atr_size (struct type *expect_type,
  34                                    struct expression *exp,
  35                                    enum noside noside, enum exp_opcode op,
  36                                    struct value *arg1);
  37 extern struct value *ada_abs (struct type *expect_type,
  38                               struct expression *exp,
  39                               enum noside noside, enum exp_opcode op,
  40                               struct value *arg1);
  41 extern struct value *ada_unop_in_range (struct type *expect_type,
  42                                         struct expression *exp,
  43                                         enum noside noside, enum exp_opcode op,
  44                                         struct value *arg1, struct type *type);
  45 extern struct value *ada_mult_binop (struct type *expect_type,
  46                                      struct expression *exp,
  47                                      enum noside noside, enum exp_opcode op,
  48                                      struct value *arg1, struct value *arg2);
  49 extern struct value *ada_equal_binop (struct type *expect_type,
  50                                       struct expression *exp,
  51                                       enum noside noside, enum exp_opcode op,
  52                                       struct value *arg1, struct value *arg2);
  53 extern struct value *ada_ternop_slice (struct expression *exp,
  54                                        enum noside noside,
  55                                        struct value *array,
  56                                        struct value *low_bound_val,
  57                                        struct value *high_bound_val);
  58
  59 namespace expr
  60 {
  61
  62 /* In Ada, some generic operations must be wrapped with a handler that
  63    handles some Ada-specific type conversions.  */
  64 class ada_wrapped_operation
  65   : public tuple_holding_operation<operation_up>
  66 {
  67 public:
  68
  69   using tuple_holding_operation::tuple_holding_operation;
  70
  71   value *evaluate (struct type *expect_type,
  72                    struct expression *exp,
  73                    enum noside noside) override;
  74
  75   enum exp_opcode opcode () const override
  76   { return std::get<0> (m_storage)->opcode (); }
  77 };
  78
  79 /* An Ada string constant.  */
  80 class ada_string_operation
  81   : public string_operation
  82 {
  83 public:
  84
  85   using string_operation::string_operation;
  86
  87   value *evaluate (struct type *expect_type,
  88                    struct expression *exp,
  89                    enum noside noside) override;
  90 };
  91
  92 /* The Ada TYPE'(EXP) construct.  */
  93 class ada_qual_operation
  94   : public tuple_holding_operation<operation_up, struct type *>
  95 {
  96 public:
  97
  98   using tuple_holding_operation::tuple_holding_operation;
  99
 100   value *evaluate (struct type *expect_type,
 101                    struct expression *exp,
 102                    enum noside noside) override;
 103
 104   enum exp_opcode opcode () const override
 105   { return UNOP_QUAL; }
 106 };
 107
 108 /* Ternary in-range operator.  */
 109 class ada_ternop_range_operation
 110   : public tuple_holding_operation<operation_up, operation_up, operation_up>
 111 {
 112 public:
 113
 114   using tuple_holding_operation::tuple_holding_operation;
 115
 116   value *evaluate (struct type *expect_type,
 117                    struct expression *exp,
 118                    enum noside noside) override;
 119
 120   enum exp_opcode opcode () const override
 121   { return TERNOP_IN_RANGE; }
 122 };
 123
 124 using ada_neg_operation = unop_operation<UNOP_NEG, ada_unop_neg>;
 125 using ada_atr_tag_operation = unop_operation<OP_ATR_TAG, ada_atr_tag>;
 126 using ada_atr_size_operation = unop_operation<OP_ATR_SIZE, ada_atr_size>;
 127 using ada_abs_operation = unop_operation<UNOP_ABS, ada_abs>;
 128
 129 /* The in-range operation, given a type.  */
 130 class ada_unop_range_operation
 131   : public tuple_holding_operation<operation_up, struct type *>
 132 {
 133 public:
 134
 135   using tuple_holding_operation::tuple_holding_operation;
 136
 137   value *evaluate (struct type *expect_type,
 138                    struct expression *exp,
 139                    enum noside noside) override
 140   {
 141     value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 142     return ada_unop_in_range (expect_type, exp, noside, UNOP_IN_RANGE,
 143                               val, std::get<1> (m_storage));
 144   }
 145
 146   enum exp_opcode opcode () const override
 147   { return UNOP_IN_RANGE; }
 148 };
 149
 150 /* The Ada + and - operators.  */
 151 class ada_binop_addsub_operation
 152   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 153 {
 154 public:
 155
 156   using tuple_holding_operation::tuple_holding_operation;
 157
 158   value *evaluate (struct type *expect_type,
 159                    struct expression *exp,
 160                    enum noside noside) override;
 161
 162   enum exp_opcode opcode () const override
 163   { return std::get<0> (m_storage); }
 164 };
 165
 166 using ada_binop_mul_operation = binop_operation<BINOP_MUL, ada_mult_binop>;
 167 using ada_binop_div_operation = binop_operation<BINOP_DIV, ada_mult_binop>;
 168 using ada_binop_rem_operation = binop_operation<BINOP_REM, ada_mult_binop>;
 169 using ada_binop_mod_operation = binop_operation<BINOP_MOD, ada_mult_binop>;
 170
 171 /* Implement the equal and not-equal operations for Ada.  */
 172 class ada_binop_equal_operation
 173   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 174 {
 175 public:
 176
 177   using tuple_holding_operation::tuple_holding_operation;
 178
 179   value *evaluate (struct type *expect_type,
 180                    struct expression *exp,
 181                    enum noside noside) override
 182   {
 183     value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 184     value *arg2 = std::get<2> (m_storage)->evaluate (value_type (arg1),
 185                                                      exp, noside);
 186     return ada_equal_binop (expect_type, exp, noside, std::get<0> (m_storage),
 187                             arg1, arg2);
 188   }
 189
 190   enum exp_opcode opcode () const override
 191   { return std::get<0> (m_storage); }
 192 };
 193
 194 /* Bitwise operators for Ada.  */
 195 template<enum exp_opcode OP>
 196 class ada_bitwise_operation
 197   : public maybe_constant_operation<operation_up, operation_up>
 198 {
 199 public:
 200
 201   using maybe_constant_operation::maybe_constant_operation;
 202
 203   value *evaluate (struct type *expect_type,
 204                    struct expression *exp,
 205                    enum noside noside) override
 206   {
 207     value *lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 208     value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 209     value *result = eval_op_binary (expect_type, exp, noside, OP, lhs, rhs);
 210     return value_cast (value_type (lhs), result);
 211   }
 212
 213   enum exp_opcode opcode () const override
 214   { return OP; }
 215 };
 216
 217 using ada_bitwise_and_operation = ada_bitwise_operation<BINOP_BITWISE_AND>;
 218 using ada_bitwise_ior_operation = ada_bitwise_operation<BINOP_BITWISE_IOR>;
 219 using ada_bitwise_xor_operation = ada_bitwise_operation<BINOP_BITWISE_XOR>;
 220
 221 /* Ada array- or string-slice operation.  */
 222 class ada_ternop_slice_operation
 223   : public maybe_constant_operation<operation_up, operation_up, operation_up>
 224 {
 225 public:
 226
 227   using maybe_constant_operation::maybe_constant_operation;
 228
 229   value *evaluate (struct type *expect_type,
 230                    struct expression *exp,
 231                    enum noside noside) override
 232   {
 233     value *array = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 234     value *low = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 235     value *high = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 236     return ada_ternop_slice (exp, noside, array, low, high);
 237   }
 238
 239   enum exp_opcode opcode () const override
 240   { return TERNOP_SLICE; }
 241 };
 242
 243 } /* namespace expr */
 244
 245 #endif /* ADA_EXP_H */