gdb/f-exp.h

   1 /* Definitions for Fortran expressions
   2
   3    Copyright (C) 2020, 2021 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 FORTRAN_EXP_H
  21 #define FORTRAN_EXP_H
  22
  23 #include "expop.h"
  24
  25 extern struct value *eval_op_f_abs (struct type *expect_type,
  26                                     struct expression *exp,
  27                                     enum noside noside,
  28                                     enum exp_opcode opcode,
  29                                     struct value *arg1);
  30 extern struct value *eval_op_f_mod (struct type *expect_type,
  31                                     struct expression *exp,
  32                                     enum noside noside,
  33                                     enum exp_opcode opcode,
  34                                     struct value *arg1, struct value *arg2);
  35 extern struct value *eval_op_f_ceil (struct type *expect_type,
  36                                      struct expression *exp,
  37                                      enum noside noside,
  38                                      enum exp_opcode opcode,
  39                                      struct value *arg1);
  40 extern struct value *eval_op_f_floor (struct type *expect_type,
  41                                       struct expression *exp,
  42                                       enum noside noside,
  43                                       enum exp_opcode opcode,
  44                                       struct value *arg1);
  45 extern struct value *eval_op_f_modulo (struct type *expect_type,
  46                                        struct expression *exp,
  47                                        enum noside noside,
  48                                        enum exp_opcode opcode,
  49                                        struct value *arg1, struct value *arg2);
  50 extern struct value *eval_op_f_cmplx (struct type *expect_type,
  51                                       struct expression *exp,
  52                                       enum noside noside,
  53                                       enum exp_opcode opcode,
  54                                       struct value *arg1, struct value *arg2);
  55 extern struct value *eval_op_f_kind (struct type *expect_type,
  56                                      struct expression *exp,
  57                                      enum noside noside,
  58                                      enum exp_opcode opcode,
  59                                      struct value *arg1);
  60 extern struct value *eval_op_f_associated (struct type *expect_type,
  61                                            struct expression *exp,
  62                                            enum noside noside,
  63                                            enum exp_opcode opcode,
  64                                            struct value *arg1);
  65 extern struct value *eval_op_f_associated (struct type *expect_type,
  66                                            struct expression *exp,
  67                                            enum noside noside,
  68                                            enum exp_opcode opcode,
  69                                            struct value *arg1,
  70                                            struct value *arg2);
  71 extern struct value * eval_op_f_allocated (struct type *expect_type,
  72                                            struct expression *exp,
  73                                            enum noside noside,
  74                                            enum exp_opcode op,
  75                                            struct value *arg1);
  76
  77 /* Implement the evaluation of UNOP_FORTRAN_RANK.  EXPECTED_TYPE, EXP, and
  78    NOSIDE are as for expression::evaluate (see expression.h).  OP will
  79    always be UNOP_FORTRAN_RANK, and ARG1 is the argument being passed to
  80    the expression.   */
  81
  82 extern struct value *eval_op_f_rank (struct type *expect_type,
  83                                      struct expression *exp,
  84                                      enum noside noside,
  85                                      enum exp_opcode op,
  86                                      struct value *arg1);
  87
  88 /* Implement expression evaluation for Fortran's SIZE keyword. For
  89    EXPECT_TYPE, EXP, and NOSIDE see expression::evaluate (in
  90    expression.h).  OP will always for FORTRAN_ARRAY_SIZE.  ARG1 is the
  91    value passed to SIZE if it is only passed a single argument.  For the
  92    two argument form see the overload of this function below.  */
  93
  94 extern struct value *eval_op_f_array_size (struct type *expect_type,
  95                                            struct expression *exp,
  96                                            enum noside noside,
  97                                            enum exp_opcode opcode,
  98                                            struct value *arg1);
  99
 100 /* An overload of EVAL_OP_F_ARRAY_SIZE above, this version takes two
 101    arguments, representing the two values passed to Fortran's SIZE
 102    keyword.  */
 103
 104 extern struct value *eval_op_f_array_size (struct type *expect_type,
 105                                            struct expression *exp,
 106                                            enum noside noside,
 107                                            enum exp_opcode opcode,
 108                                            struct value *arg1,
 109                                            struct value *arg2);
 110
 111
 112 namespace expr
 113 {
 114
 115 using fortran_abs_operation = unop_operation<UNOP_ABS, eval_op_f_abs>;
 116 using fortran_ceil_operation = unop_operation<UNOP_FORTRAN_CEILING,
 117                                               eval_op_f_ceil>;
 118 using fortran_floor_operation = unop_operation<UNOP_FORTRAN_FLOOR,
 119                                                eval_op_f_floor>;
 120 using fortran_kind_operation = unop_operation<UNOP_FORTRAN_KIND,
 121                                               eval_op_f_kind>;
 122 using fortran_allocated_operation = unop_operation<UNOP_FORTRAN_ALLOCATED,
 123                                                    eval_op_f_allocated>;
 124
 125 using fortran_mod_operation = binop_operation<BINOP_MOD, eval_op_f_mod>;
 126 using fortran_modulo_operation = binop_operation<BINOP_FORTRAN_MODULO,
 127                                                  eval_op_f_modulo>;
 128 using fortran_associated_1arg = unop_operation<FORTRAN_ASSOCIATED,
 129                                                eval_op_f_associated>;
 130 using fortran_associated_2arg = binop_operation<FORTRAN_ASSOCIATED,
 131                                                 eval_op_f_associated>;
 132 using fortran_rank_operation = unop_operation<UNOP_FORTRAN_RANK,
 133                                               eval_op_f_rank>;
 134 using fortran_array_size_1arg = unop_operation<FORTRAN_ARRAY_SIZE,
 135                                                eval_op_f_array_size>;
 136 using fortran_array_size_2arg = binop_operation<FORTRAN_ARRAY_SIZE,
 137                                                 eval_op_f_array_size>;
 138
 139 /* The Fortran "complex" operation.  */
 140 class fortran_cmplx_operation
 141   : public tuple_holding_operation<operation_up, operation_up>
 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 *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 152     value *arg2 = std::get<1> (m_storage)->evaluate (value_type (arg1),
 153                                                      exp, noside);
 154     return eval_op_f_cmplx (expect_type, exp, noside, BINOP_FORTRAN_CMPLX,
 155                             arg1, arg2);
 156   }
 157
 158   enum exp_opcode opcode () const override
 159   { return BINOP_FORTRAN_CMPLX; }
 160 };
 161
 162 /* OP_RANGE for Fortran.  */
 163 class fortran_range_operation
 164   : public tuple_holding_operation<enum range_flag, operation_up, operation_up,
 165                                    operation_up>
 166 {
 167 public:
 168
 169   using tuple_holding_operation::tuple_holding_operation;
 170
 171   value *evaluate (struct type *expect_type,
 172                    struct expression *exp,
 173                    enum noside noside) override
 174   {
 175     error (_("ranges not allowed in this context"));
 176   }
 177
 178   range_flag get_flags () const
 179   {
 180     return std::get<0> (m_storage);
 181   }
 182
 183   value *evaluate0 (struct expression *exp, enum noside noside) const
 184   {
 185     return std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 186   }
 187
 188   value *evaluate1 (struct expression *exp, enum noside noside) const
 189   {
 190     return std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 191   }
 192
 193   value *evaluate2 (struct expression *exp, enum noside noside) const
 194   {
 195     return std::get<3> (m_storage)->evaluate (nullptr, exp, noside);
 196   }
 197
 198   enum exp_opcode opcode () const override
 199   { return OP_RANGE; }
 200 };
 201
 202 /* In F77, functions, substring ops and array subscript operations
 203    cannot be disambiguated at parse time.  This operation handles
 204    both, deciding which do to at evaluation time.  */
 205 class fortran_undetermined
 206   : public tuple_holding_operation<operation_up, std::vector<operation_up>>
 207 {
 208 public:
 209
 210   using tuple_holding_operation::tuple_holding_operation;
 211
 212   value *evaluate (struct type *expect_type,
 213                    struct expression *exp,
 214                    enum noside noside) override;
 215
 216   enum exp_opcode opcode () const override
 217   { return OP_F77_UNDETERMINED_ARGLIST; }
 218
 219 private:
 220
 221   value *value_subarray (value *array, struct expression *exp,
 222                          enum noside noside);
 223 };
 224
 225 /* Single-argument form of Fortran ubound/lbound intrinsics.  */
 226 class fortran_bound_1arg
 227   : public tuple_holding_operation<exp_opcode, operation_up>
 228 {
 229 public:
 230
 231   using tuple_holding_operation::tuple_holding_operation;
 232
 233   value *evaluate (struct type *expect_type,
 234                    struct expression *exp,
 235                    enum noside noside) override;
 236
 237   enum exp_opcode opcode () const override
 238   { return std::get<0> (m_storage); }
 239 };
 240
 241 /* Two-argument form of Fortran ubound/lbound intrinsics.  */
 242 class fortran_bound_2arg
 243   : public tuple_holding_operation<exp_opcode, operation_up, operation_up>
 244 {
 245 public:
 246
 247   using tuple_holding_operation::tuple_holding_operation;
 248
 249   value *evaluate (struct type *expect_type,
 250                    struct expression *exp,
 251                    enum noside noside) override;
 252
 253   enum exp_opcode opcode () const override
 254   { return std::get<0> (m_storage); }
 255 };
 256
 257 } /* namespace expr */
 258
 259 #endif /* FORTRAN_EXP_H */