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 extern struct value *ada_binop_in_bounds (struct expression *exp,
  59                                           enum noside noside,
  60                                           struct value *arg1,
  61                                           struct value *arg2,
  62                                           int n);
  63 extern struct value *ada_binop_minmax (struct type *expect_type,
  64                                        struct expression *exp,
  65                                        enum noside noside, enum exp_opcode op,
  66                                        struct value *arg1,
  67                                        struct value *arg2);
  68
  69 namespace expr
  70 {
  71
  72 /* In Ada, some generic operations must be wrapped with a handler that
  73    handles some Ada-specific type conversions.  */
  74 class ada_wrapped_operation
  75   : public tuple_holding_operation<operation_up>
  76 {
  77 public:
  78
  79   using tuple_holding_operation::tuple_holding_operation;
  80
  81   value *evaluate (struct type *expect_type,
  82                    struct expression *exp,
  83                    enum noside noside) override;
  84
  85   enum exp_opcode opcode () const override
  86   { return std::get<0> (m_storage)->opcode (); }
  87 };
  88
  89 /* An Ada string constant.  */
  90 class ada_string_operation
  91   : public string_operation
  92 {
  93 public:
  94
  95   using string_operation::string_operation;
  96
  97   value *evaluate (struct type *expect_type,
  98                    struct expression *exp,
  99                    enum noside noside) override;
 100 };
 101
 102 /* The Ada TYPE'(EXP) construct.  */
 103 class ada_qual_operation
 104   : public tuple_holding_operation<operation_up, struct type *>
 105 {
 106 public:
 107
 108   using tuple_holding_operation::tuple_holding_operation;
 109
 110   value *evaluate (struct type *expect_type,
 111                    struct expression *exp,
 112                    enum noside noside) override;
 113
 114   enum exp_opcode opcode () const override
 115   { return UNOP_QUAL; }
 116 };
 117
 118 /* Ternary in-range operator.  */
 119 class ada_ternop_range_operation
 120   : public tuple_holding_operation<operation_up, operation_up, operation_up>
 121 {
 122 public:
 123
 124   using tuple_holding_operation::tuple_holding_operation;
 125
 126   value *evaluate (struct type *expect_type,
 127                    struct expression *exp,
 128                    enum noside noside) override;
 129
 130   enum exp_opcode opcode () const override
 131   { return TERNOP_IN_RANGE; }
 132 };
 133
 134 using ada_neg_operation = unop_operation<UNOP_NEG, ada_unop_neg>;
 135 using ada_atr_tag_operation = unop_operation<OP_ATR_TAG, ada_atr_tag>;
 136 using ada_atr_size_operation = unop_operation<OP_ATR_SIZE, ada_atr_size>;
 137 using ada_abs_operation = unop_operation<UNOP_ABS, ada_abs>;
 138
 139 /* The in-range operation, given a type.  */
 140 class ada_unop_range_operation
 141   : public tuple_holding_operation<operation_up, struct type *>
 142 {
 143 public:
 144
 145   using tuple_holding_operation::tuple_holding_operation;
 146
 147   value *evaluate (struct type *expect_type,
 148                    struct expression *exp,
 149                    enum noside noside) override
 150   {
 151     value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 152     return ada_unop_in_range (expect_type, exp, noside, UNOP_IN_RANGE,
 153                               val, std::get<1> (m_storage));
 154   }
 155
 156   enum exp_opcode opcode () const override
 157   { return UNOP_IN_RANGE; }
 158 };
 159
 160 /* The Ada + and - operators.  */
 161 class ada_binop_addsub_operation
 162   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 163 {
 164 public:
 165
 166   using tuple_holding_operation::tuple_holding_operation;
 167
 168   value *evaluate (struct type *expect_type,
 169                    struct expression *exp,
 170                    enum noside noside) override;
 171
 172   enum exp_opcode opcode () const override
 173   { return std::get<0> (m_storage); }
 174 };
 175
 176 using ada_binop_mul_operation = binop_operation<BINOP_MUL, ada_mult_binop>;
 177 using ada_binop_div_operation = binop_operation<BINOP_DIV, ada_mult_binop>;
 178 using ada_binop_rem_operation = binop_operation<BINOP_REM, ada_mult_binop>;
 179 using ada_binop_mod_operation = binop_operation<BINOP_MOD, ada_mult_binop>;
 180
 181 using ada_binop_min_operation = binop_operation<OP_ATR_MIN, ada_binop_minmax>;
 182 using ada_binop_max_operation = binop_operation<OP_ATR_MAX, ada_binop_minmax>;
 183
 184 /* Implement the equal and not-equal operations for Ada.  */
 185 class ada_binop_equal_operation
 186   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 187 {
 188 public:
 189
 190   using tuple_holding_operation::tuple_holding_operation;
 191
 192   value *evaluate (struct type *expect_type,
 193                    struct expression *exp,
 194                    enum noside noside) override
 195   {
 196     value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 197     value *arg2 = std::get<2> (m_storage)->evaluate (value_type (arg1),
 198                                                      exp, noside);
 199     return ada_equal_binop (expect_type, exp, noside, std::get<0> (m_storage),
 200                             arg1, arg2);
 201   }
 202
 203   enum exp_opcode opcode () const override
 204   { return std::get<0> (m_storage); }
 205 };
 206
 207 /* Bitwise operators for Ada.  */
 208 template<enum exp_opcode OP>
 209 class ada_bitwise_operation
 210   : public maybe_constant_operation<operation_up, operation_up>
 211 {
 212 public:
 213
 214   using maybe_constant_operation::maybe_constant_operation;
 215
 216   value *evaluate (struct type *expect_type,
 217                    struct expression *exp,
 218                    enum noside noside) override
 219   {
 220     value *lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 221     value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 222     value *result = eval_op_binary (expect_type, exp, noside, OP, lhs, rhs);
 223     return value_cast (value_type (lhs), result);
 224   }
 225
 226   enum exp_opcode opcode () const override
 227   { return OP; }
 228 };
 229
 230 using ada_bitwise_and_operation = ada_bitwise_operation<BINOP_BITWISE_AND>;
 231 using ada_bitwise_ior_operation = ada_bitwise_operation<BINOP_BITWISE_IOR>;
 232 using ada_bitwise_xor_operation = ada_bitwise_operation<BINOP_BITWISE_XOR>;
 233
 234 /* Ada array- or string-slice operation.  */
 235 class ada_ternop_slice_operation
 236   : public maybe_constant_operation<operation_up, operation_up, operation_up>
 237 {
 238 public:
 239
 240   using maybe_constant_operation::maybe_constant_operation;
 241
 242   value *evaluate (struct type *expect_type,
 243                    struct expression *exp,
 244                    enum noside noside) override
 245   {
 246     value *array = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 247     value *low = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 248     value *high = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 249     return ada_ternop_slice (exp, noside, array, low, high);
 250   }
 251
 252   enum exp_opcode opcode () const override
 253   { return TERNOP_SLICE; }
 254 };
 255
 256 /* Implement BINOP_IN_BOUNDS for Ada.  */
 257 class ada_binop_in_bounds_operation
 258   : public maybe_constant_operation<operation_up, operation_up, int>
 259 {
 260 public:
 261
 262   using maybe_constant_operation::maybe_constant_operation;
 263
 264   value *evaluate (struct type *expect_type,
 265                    struct expression *exp,
 266                    enum noside noside) override
 267   {
 268     value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 269     value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 270     return ada_binop_in_bounds (exp, noside, arg1, arg2,
 271                                 std::get<2> (m_storage));
 272   }
 273
 274   enum exp_opcode opcode () const override
 275   { return BINOP_IN_BOUNDS; }
 276 };
 277
 278 /* Implement several unary Ada OP_ATR_* operations.  */
 279 class ada_unop_atr_operation
 280   : public maybe_constant_operation<operation_up, enum exp_opcode, int>
 281 {
 282 public:
 283
 284   using maybe_constant_operation::maybe_constant_operation;
 285
 286   value *evaluate (struct type *expect_type,
 287                    struct expression *exp,
 288                    enum noside noside) override;
 289
 290   enum exp_opcode opcode () const override
 291   { return std::get<1> (m_storage); }
 292 };
 293
 294 /* Variant of var_value_operation for Ada.  */
 295 class ada_var_value_operation
 296   : public var_value_operation
 297 {
 298 public:
 299
 300   using var_value_operation::var_value_operation;
 301
 302   value *evaluate (struct type *expect_type,
 303                    struct expression *exp,
 304                    enum noside noside) override;
 305
 306   value *evaluate_for_cast (struct type *expect_type,
 307                             struct expression *exp,
 308                             enum noside noside) override;
 309
 310 protected:
 311
 312   using operation::do_generate_ax;
 313 };
 314
 315 /* Variant of var_msym_value_operation for Ada.  */
 316 class ada_var_msym_value_operation
 317   : public var_msym_value_operation
 318 {
 319 public:
 320
 321   using var_msym_value_operation::var_msym_value_operation;
 322
 323   value *evaluate_for_cast (struct type *expect_type,
 324                             struct expression *exp,
 325                             enum noside noside) override;
 326
 327 protected:
 328
 329   using operation::do_generate_ax;
 330 };
 331
 332 } /* namespace expr */
 333
 334 #endif /* ADA_EXP_H */