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 extern struct value *ada_pos_atr (struct type *expect_type,
  69                                   struct expression *exp,
  70                                   enum noside noside, enum exp_opcode op,
  71                                   struct value *arg);
  72 extern struct value *ada_val_atr (enum noside noside, struct type *type,
  73                                   struct value *arg);
  74 extern struct value *ada_binop_exp (struct type *expect_type,
  75                                     struct expression *exp,
  76                                     enum noside noside, enum exp_opcode op,
  77                                     struct value *arg1, struct value *arg2);
  78
  79 namespace expr
  80 {
  81
  82 /* In Ada, some generic operations must be wrapped with a handler that
  83    handles some Ada-specific type conversions.  */
  84 class ada_wrapped_operation
  85   : public tuple_holding_operation<operation_up>
  86 {
  87 public:
  88
  89   using tuple_holding_operation::tuple_holding_operation;
  90
  91   value *evaluate (struct type *expect_type,
  92                    struct expression *exp,
  93                    enum noside noside) override;
  94
  95   enum exp_opcode opcode () const override
  96   { return std::get<0> (m_storage)->opcode (); }
  97 };
  98
  99 /* An Ada string constant.  */
 100 class ada_string_operation
 101   : public string_operation
 102 {
 103 public:
 104
 105   using string_operation::string_operation;
 106
 107   value *evaluate (struct type *expect_type,
 108                    struct expression *exp,
 109                    enum noside noside) override;
 110 };
 111
 112 /* The Ada TYPE'(EXP) construct.  */
 113 class ada_qual_operation
 114   : public tuple_holding_operation<operation_up, struct type *>
 115 {
 116 public:
 117
 118   using tuple_holding_operation::tuple_holding_operation;
 119
 120   value *evaluate (struct type *expect_type,
 121                    struct expression *exp,
 122                    enum noside noside) override;
 123
 124   enum exp_opcode opcode () const override
 125   { return UNOP_QUAL; }
 126 };
 127
 128 /* Ternary in-range operator.  */
 129 class ada_ternop_range_operation
 130   : public tuple_holding_operation<operation_up, operation_up, operation_up>
 131 {
 132 public:
 133
 134   using tuple_holding_operation::tuple_holding_operation;
 135
 136   value *evaluate (struct type *expect_type,
 137                    struct expression *exp,
 138                    enum noside noside) override;
 139
 140   enum exp_opcode opcode () const override
 141   { return TERNOP_IN_RANGE; }
 142 };
 143
 144 using ada_neg_operation = unop_operation<UNOP_NEG, ada_unop_neg>;
 145 using ada_atr_tag_operation = unop_operation<OP_ATR_TAG, ada_atr_tag>;
 146 using ada_atr_size_operation = unop_operation<OP_ATR_SIZE, ada_atr_size>;
 147 using ada_abs_operation = unop_operation<UNOP_ABS, ada_abs>;
 148 using ada_pos_operation = unop_operation<OP_ATR_POS, ada_pos_atr>;
 149
 150 /* The in-range operation, given a type.  */
 151 class ada_unop_range_operation
 152   : public tuple_holding_operation<operation_up, struct type *>
 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     value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 163     return ada_unop_in_range (expect_type, exp, noside, UNOP_IN_RANGE,
 164                               val, std::get<1> (m_storage));
 165   }
 166
 167   enum exp_opcode opcode () const override
 168   { return UNOP_IN_RANGE; }
 169 };
 170
 171 /* The Ada + and - operators.  */
 172 class ada_binop_addsub_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   enum exp_opcode opcode () const override
 184   { return std::get<0> (m_storage); }
 185 };
 186
 187 using ada_binop_mul_operation = binop_operation<BINOP_MUL, ada_mult_binop>;
 188 using ada_binop_div_operation = binop_operation<BINOP_DIV, ada_mult_binop>;
 189 using ada_binop_rem_operation = binop_operation<BINOP_REM, ada_mult_binop>;
 190 using ada_binop_mod_operation = binop_operation<BINOP_MOD, ada_mult_binop>;
 191
 192 using ada_binop_min_operation = binop_operation<OP_ATR_MIN, ada_binop_minmax>;
 193 using ada_binop_max_operation = binop_operation<OP_ATR_MAX, ada_binop_minmax>;
 194
 195 using ada_binop_exp_operation = binop_operation<BINOP_EXP, ada_binop_exp>;
 196
 197 /* Implement the equal and not-equal operations for Ada.  */
 198 class ada_binop_equal_operation
 199   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 200 {
 201 public:
 202
 203   using tuple_holding_operation::tuple_holding_operation;
 204
 205   value *evaluate (struct type *expect_type,
 206                    struct expression *exp,
 207                    enum noside noside) override
 208   {
 209     value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 210     value *arg2 = std::get<2> (m_storage)->evaluate (value_type (arg1),
 211                                                      exp, noside);
 212     return ada_equal_binop (expect_type, exp, noside, std::get<0> (m_storage),
 213                             arg1, arg2);
 214   }
 215
 216   enum exp_opcode opcode () const override
 217   { return std::get<0> (m_storage); }
 218 };
 219
 220 /* Bitwise operators for Ada.  */
 221 template<enum exp_opcode OP>
 222 class ada_bitwise_operation
 223   : public maybe_constant_operation<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 *lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 234     value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 235     value *result = eval_op_binary (expect_type, exp, noside, OP, lhs, rhs);
 236     return value_cast (value_type (lhs), result);
 237   }
 238
 239   enum exp_opcode opcode () const override
 240   { return OP; }
 241 };
 242
 243 using ada_bitwise_and_operation = ada_bitwise_operation<BINOP_BITWISE_AND>;
 244 using ada_bitwise_ior_operation = ada_bitwise_operation<BINOP_BITWISE_IOR>;
 245 using ada_bitwise_xor_operation = ada_bitwise_operation<BINOP_BITWISE_XOR>;
 246
 247 /* Ada array- or string-slice operation.  */
 248 class ada_ternop_slice_operation
 249   : public maybe_constant_operation<operation_up, operation_up, operation_up>
 250 {
 251 public:
 252
 253   using maybe_constant_operation::maybe_constant_operation;
 254
 255   value *evaluate (struct type *expect_type,
 256                    struct expression *exp,
 257                    enum noside noside) override
 258   {
 259     value *array = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 260     value *low = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 261     value *high = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 262     return ada_ternop_slice (exp, noside, array, low, high);
 263   }
 264
 265   enum exp_opcode opcode () const override
 266   { return TERNOP_SLICE; }
 267 };
 268
 269 /* Implement BINOP_IN_BOUNDS for Ada.  */
 270 class ada_binop_in_bounds_operation
 271   : public maybe_constant_operation<operation_up, operation_up, int>
 272 {
 273 public:
 274
 275   using maybe_constant_operation::maybe_constant_operation;
 276
 277   value *evaluate (struct type *expect_type,
 278                    struct expression *exp,
 279                    enum noside noside) override
 280   {
 281     value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 282     value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 283     return ada_binop_in_bounds (exp, noside, arg1, arg2,
 284                                 std::get<2> (m_storage));
 285   }
 286
 287   enum exp_opcode opcode () const override
 288   { return BINOP_IN_BOUNDS; }
 289 };
 290
 291 /* Implement several unary Ada OP_ATR_* operations.  */
 292 class ada_unop_atr_operation
 293   : public maybe_constant_operation<operation_up, enum exp_opcode, int>
 294 {
 295 public:
 296
 297   using maybe_constant_operation::maybe_constant_operation;
 298
 299   value *evaluate (struct type *expect_type,
 300                    struct expression *exp,
 301                    enum noside noside) override;
 302
 303   enum exp_opcode opcode () const override
 304   { return std::get<1> (m_storage); }
 305 };
 306
 307 /* Variant of var_value_operation for Ada.  */
 308 class ada_var_value_operation
 309   : public var_value_operation
 310 {
 311 public:
 312
 313   using var_value_operation::var_value_operation;
 314
 315   value *evaluate (struct type *expect_type,
 316                    struct expression *exp,
 317                    enum noside noside) override;
 318
 319   value *evaluate_for_cast (struct type *expect_type,
 320                             struct expression *exp,
 321                             enum noside noside) override;
 322
 323   symbol *get_symbol () const
 324   { return std::get<0> (m_storage); }
 325
 326 protected:
 327
 328   using operation::do_generate_ax;
 329 };
 330
 331 /* Variant of var_msym_value_operation for Ada.  */
 332 class ada_var_msym_value_operation
 333   : public var_msym_value_operation
 334 {
 335 public:
 336
 337   using var_msym_value_operation::var_msym_value_operation;
 338
 339   value *evaluate_for_cast (struct type *expect_type,
 340                             struct expression *exp,
 341                             enum noside noside) override;
 342
 343 protected:
 344
 345   using operation::do_generate_ax;
 346 };
 347
 348 /* Implement the Ada 'val attribute.  */
 349 class ada_atr_val_operation
 350   : public tuple_holding_operation<struct type *, operation_up>
 351 {
 352 public:
 353
 354   using tuple_holding_operation::tuple_holding_operation;
 355
 356   value *evaluate (struct type *expect_type,
 357                    struct expression *exp,
 358                    enum noside noside) override;
 359
 360   enum exp_opcode opcode () const override
 361   { return OP_ATR_VAL; }
 362 };
 363
 364 /* The indirection operator for Ada.  */
 365 class ada_unop_ind_operation
 366   : public unop_ind_base_operation
 367 {
 368 public:
 369
 370   using unop_ind_base_operation::unop_ind_base_operation;
 371
 372   value *evaluate (struct type *expect_type,
 373                    struct expression *exp,
 374                    enum noside noside) override;
 375 };
 376
 377 /* Implement STRUCTOP_STRUCT for Ada.  */
 378 class ada_structop_operation
 379   : public structop_base_operation
 380 {
 381 public:
 382
 383   using structop_base_operation::structop_base_operation;
 384
 385   value *evaluate (struct type *expect_type,
 386                    struct expression *exp,
 387                    enum noside noside) override;
 388
 389   enum exp_opcode opcode () const override
 390   { return STRUCTOP_STRUCT; }
 391 };
 392
 393 /* Function calls for Ada.  */
 394 class ada_funcall_operation
 395   : public tuple_holding_operation<operation_up, std::vector<operation_up>>
 396 {
 397 public:
 398
 399   using tuple_holding_operation::tuple_holding_operation;
 400
 401   value *evaluate (struct type *expect_type,
 402                    struct expression *exp,
 403                    enum noside noside) override;
 404
 405   enum exp_opcode opcode () const override
 406   { return OP_FUNCALL; }
 407 };
 408
 409 } /* namespace expr */
 410
 411 #endif /* ADA_EXP_H */