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
  73 namespace expr
  74 {
  75
  76 /* In Ada, some generic operations must be wrapped with a handler that
  77    handles some Ada-specific type conversions.  */
  78 class ada_wrapped_operation
  79   : public tuple_holding_operation<operation_up>
  80 {
  81 public:
  82
  83   using tuple_holding_operation::tuple_holding_operation;
  84
  85   value *evaluate (struct type *expect_type,
  86                    struct expression *exp,
  87                    enum noside noside) override;
  88
  89   enum exp_opcode opcode () const override
  90   { return std::get<0> (m_storage)->opcode (); }
  91 };
  92
  93 /* An Ada string constant.  */
  94 class ada_string_operation
  95   : public string_operation
  96 {
  97 public:
  98
  99   using string_operation::string_operation;
 100
 101   value *evaluate (struct type *expect_type,
 102                    struct expression *exp,
 103                    enum noside noside) override;
 104 };
 105
 106 /* The Ada TYPE'(EXP) construct.  */
 107 class ada_qual_operation
 108   : public tuple_holding_operation<operation_up, struct type *>
 109 {
 110 public:
 111
 112   using tuple_holding_operation::tuple_holding_operation;
 113
 114   value *evaluate (struct type *expect_type,
 115                    struct expression *exp,
 116                    enum noside noside) override;
 117
 118   enum exp_opcode opcode () const override
 119   { return UNOP_QUAL; }
 120 };
 121
 122 /* Ternary in-range operator.  */
 123 class ada_ternop_range_operation
 124   : public tuple_holding_operation<operation_up, operation_up, operation_up>
 125 {
 126 public:
 127
 128   using tuple_holding_operation::tuple_holding_operation;
 129
 130   value *evaluate (struct type *expect_type,
 131                    struct expression *exp,
 132                    enum noside noside) override;
 133
 134   enum exp_opcode opcode () const override
 135   { return TERNOP_IN_RANGE; }
 136 };
 137
 138 using ada_neg_operation = unop_operation<UNOP_NEG, ada_unop_neg>;
 139 using ada_atr_tag_operation = unop_operation<OP_ATR_TAG, ada_atr_tag>;
 140 using ada_atr_size_operation = unop_operation<OP_ATR_SIZE, ada_atr_size>;
 141 using ada_abs_operation = unop_operation<UNOP_ABS, ada_abs>;
 142 using ada_pos_operation = unop_operation<OP_ATR_POS, ada_pos_atr>;
 143
 144 /* The in-range operation, given a type.  */
 145 class ada_unop_range_operation
 146   : public tuple_holding_operation<operation_up, struct type *>
 147 {
 148 public:
 149
 150   using tuple_holding_operation::tuple_holding_operation;
 151
 152   value *evaluate (struct type *expect_type,
 153                    struct expression *exp,
 154                    enum noside noside) override
 155   {
 156     value *val = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 157     return ada_unop_in_range (expect_type, exp, noside, UNOP_IN_RANGE,
 158                               val, std::get<1> (m_storage));
 159   }
 160
 161   enum exp_opcode opcode () const override
 162   { return UNOP_IN_RANGE; }
 163 };
 164
 165 /* The Ada + and - operators.  */
 166 class ada_binop_addsub_operation
 167   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 168 {
 169 public:
 170
 171   using tuple_holding_operation::tuple_holding_operation;
 172
 173   value *evaluate (struct type *expect_type,
 174                    struct expression *exp,
 175                    enum noside noside) override;
 176
 177   enum exp_opcode opcode () const override
 178   { return std::get<0> (m_storage); }
 179 };
 180
 181 using ada_binop_mul_operation = binop_operation<BINOP_MUL, ada_mult_binop>;
 182 using ada_binop_div_operation = binop_operation<BINOP_DIV, ada_mult_binop>;
 183 using ada_binop_rem_operation = binop_operation<BINOP_REM, ada_mult_binop>;
 184 using ada_binop_mod_operation = binop_operation<BINOP_MOD, ada_mult_binop>;
 185
 186 using ada_binop_min_operation = binop_operation<OP_ATR_MIN, ada_binop_minmax>;
 187 using ada_binop_max_operation = binop_operation<OP_ATR_MAX, ada_binop_minmax>;
 188
 189 /* Implement the equal and not-equal operations for Ada.  */
 190 class ada_binop_equal_operation
 191   : public tuple_holding_operation<enum exp_opcode, operation_up, operation_up>
 192 {
 193 public:
 194
 195   using tuple_holding_operation::tuple_holding_operation;
 196
 197   value *evaluate (struct type *expect_type,
 198                    struct expression *exp,
 199                    enum noside noside) override
 200   {
 201     value *arg1 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 202     value *arg2 = std::get<2> (m_storage)->evaluate (value_type (arg1),
 203                                                      exp, noside);
 204     return ada_equal_binop (expect_type, exp, noside, std::get<0> (m_storage),
 205                             arg1, arg2);
 206   }
 207
 208   enum exp_opcode opcode () const override
 209   { return std::get<0> (m_storage); }
 210 };
 211
 212 /* Bitwise operators for Ada.  */
 213 template<enum exp_opcode OP>
 214 class ada_bitwise_operation
 215   : public maybe_constant_operation<operation_up, operation_up>
 216 {
 217 public:
 218
 219   using maybe_constant_operation::maybe_constant_operation;
 220
 221   value *evaluate (struct type *expect_type,
 222                    struct expression *exp,
 223                    enum noside noside) override
 224   {
 225     value *lhs = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 226     value *rhs = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 227     value *result = eval_op_binary (expect_type, exp, noside, OP, lhs, rhs);
 228     return value_cast (value_type (lhs), result);
 229   }
 230
 231   enum exp_opcode opcode () const override
 232   { return OP; }
 233 };
 234
 235 using ada_bitwise_and_operation = ada_bitwise_operation<BINOP_BITWISE_AND>;
 236 using ada_bitwise_ior_operation = ada_bitwise_operation<BINOP_BITWISE_IOR>;
 237 using ada_bitwise_xor_operation = ada_bitwise_operation<BINOP_BITWISE_XOR>;
 238
 239 /* Ada array- or string-slice operation.  */
 240 class ada_ternop_slice_operation
 241   : public maybe_constant_operation<operation_up, operation_up, operation_up>
 242 {
 243 public:
 244
 245   using maybe_constant_operation::maybe_constant_operation;
 246
 247   value *evaluate (struct type *expect_type,
 248                    struct expression *exp,
 249                    enum noside noside) override
 250   {
 251     value *array = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 252     value *low = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 253     value *high = std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 254     return ada_ternop_slice (exp, noside, array, low, high);
 255   }
 256
 257   enum exp_opcode opcode () const override
 258   { return TERNOP_SLICE; }
 259 };
 260
 261 /* Implement BINOP_IN_BOUNDS for Ada.  */
 262 class ada_binop_in_bounds_operation
 263   : public maybe_constant_operation<operation_up, operation_up, int>
 264 {
 265 public:
 266
 267   using maybe_constant_operation::maybe_constant_operation;
 268
 269   value *evaluate (struct type *expect_type,
 270                    struct expression *exp,
 271                    enum noside noside) override
 272   {
 273     value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 274     value *arg2 = std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 275     return ada_binop_in_bounds (exp, noside, arg1, arg2,
 276                                 std::get<2> (m_storage));
 277   }
 278
 279   enum exp_opcode opcode () const override
 280   { return BINOP_IN_BOUNDS; }
 281 };
 282
 283 /* Implement several unary Ada OP_ATR_* operations.  */
 284 class ada_unop_atr_operation
 285   : public maybe_constant_operation<operation_up, enum exp_opcode, int>
 286 {
 287 public:
 288
 289   using maybe_constant_operation::maybe_constant_operation;
 290
 291   value *evaluate (struct type *expect_type,
 292                    struct expression *exp,
 293                    enum noside noside) override;
 294
 295   enum exp_opcode opcode () const override
 296   { return std::get<1> (m_storage); }
 297 };
 298
 299 /* Variant of var_value_operation for Ada.  */
 300 class ada_var_value_operation
 301   : public var_value_operation
 302 {
 303 public:
 304
 305   using var_value_operation::var_value_operation;
 306
 307   value *evaluate (struct type *expect_type,
 308                    struct expression *exp,
 309                    enum noside noside) override;
 310
 311   value *evaluate_for_cast (struct type *expect_type,
 312                             struct expression *exp,
 313                             enum noside noside) override;
 314
 315 protected:
 316
 317   using operation::do_generate_ax;
 318 };
 319
 320 /* Variant of var_msym_value_operation for Ada.  */
 321 class ada_var_msym_value_operation
 322   : public var_msym_value_operation
 323 {
 324 public:
 325
 326   using var_msym_value_operation::var_msym_value_operation;
 327
 328   value *evaluate_for_cast (struct type *expect_type,
 329                             struct expression *exp,
 330                             enum noside noside) override;
 331
 332 protected:
 333
 334   using operation::do_generate_ax;
 335 };
 336
 337 } /* namespace expr */
 338
 339 #endif /* ADA_EXP_H */