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 namespace expr
  89 {
  90
  91 using fortran_abs_operation = unop_operation<UNOP_ABS, eval_op_f_abs>;
  92 using fortran_ceil_operation = unop_operation<UNOP_FORTRAN_CEILING,
  93                                               eval_op_f_ceil>;
  94 using fortran_floor_operation = unop_operation<UNOP_FORTRAN_FLOOR,
  95                                                eval_op_f_floor>;
  96 using fortran_kind_operation = unop_operation<UNOP_FORTRAN_KIND,
  97                                               eval_op_f_kind>;
  98 using fortran_allocated_operation = unop_operation<UNOP_FORTRAN_ALLOCATED,
  99                                                    eval_op_f_allocated>;
 100
 101 using fortran_mod_operation = binop_operation<BINOP_MOD, eval_op_f_mod>;
 102 using fortran_modulo_operation = binop_operation<BINOP_FORTRAN_MODULO,
 103                                                  eval_op_f_modulo>;
 104 using fortran_associated_1arg = unop_operation<FORTRAN_ASSOCIATED,
 105                                                eval_op_f_associated>;
 106 using fortran_associated_2arg = binop_operation<FORTRAN_ASSOCIATED,
 107                                                 eval_op_f_associated>;
 108 using fortran_rank_operation = unop_operation<UNOP_FORTRAN_RANK,
 109                                               eval_op_f_rank>;
 110
 111 /* The Fortran "complex" operation.  */
 112 class fortran_cmplx_operation
 113   : public tuple_holding_operation<operation_up, operation_up>
 114 {
 115 public:
 116
 117   using tuple_holding_operation::tuple_holding_operation;
 118
 119   value *evaluate (struct type *expect_type,
 120                    struct expression *exp,
 121                    enum noside noside) override
 122   {
 123     value *arg1 = std::get<0> (m_storage)->evaluate (nullptr, exp, noside);
 124     value *arg2 = std::get<1> (m_storage)->evaluate (value_type (arg1),
 125                                                      exp, noside);
 126     return eval_op_f_cmplx (expect_type, exp, noside, BINOP_FORTRAN_CMPLX,
 127                             arg1, arg2);
 128   }
 129
 130   enum exp_opcode opcode () const override
 131   { return BINOP_FORTRAN_CMPLX; }
 132 };
 133
 134 /* OP_RANGE for Fortran.  */
 135 class fortran_range_operation
 136   : public tuple_holding_operation<enum range_flag, operation_up, operation_up,
 137                                    operation_up>
 138 {
 139 public:
 140
 141   using tuple_holding_operation::tuple_holding_operation;
 142
 143   value *evaluate (struct type *expect_type,
 144                    struct expression *exp,
 145                    enum noside noside) override
 146   {
 147     error (_("ranges not allowed in this context"));
 148   }
 149
 150   range_flag get_flags () const
 151   {
 152     return std::get<0> (m_storage);
 153   }
 154
 155   value *evaluate0 (struct expression *exp, enum noside noside) const
 156   {
 157     return std::get<1> (m_storage)->evaluate (nullptr, exp, noside);
 158   }
 159
 160   value *evaluate1 (struct expression *exp, enum noside noside) const
 161   {
 162     return std::get<2> (m_storage)->evaluate (nullptr, exp, noside);
 163   }
 164
 165   value *evaluate2 (struct expression *exp, enum noside noside) const
 166   {
 167     return std::get<3> (m_storage)->evaluate (nullptr, exp, noside);
 168   }
 169
 170   enum exp_opcode opcode () const override
 171   { return OP_RANGE; }
 172 };
 173
 174 /* In F77, functions, substring ops and array subscript operations
 175    cannot be disambiguated at parse time.  This operation handles
 176    both, deciding which do to at evaluation time.  */
 177 class fortran_undetermined
 178   : public tuple_holding_operation<operation_up, std::vector<operation_up>>
 179 {
 180 public:
 181
 182   using tuple_holding_operation::tuple_holding_operation;
 183
 184   value *evaluate (struct type *expect_type,
 185                    struct expression *exp,
 186                    enum noside noside) override;
 187
 188   enum exp_opcode opcode () const override
 189   { return OP_F77_UNDETERMINED_ARGLIST; }
 190
 191 private:
 192
 193   value *value_subarray (value *array, struct expression *exp,
 194                          enum noside noside);
 195 };
 196
 197 /* Single-argument form of Fortran ubound/lbound intrinsics.  */
 198 class fortran_bound_1arg
 199   : public tuple_holding_operation<exp_opcode, 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   enum exp_opcode opcode () const override
 210   { return std::get<0> (m_storage); }
 211 };
 212
 213 /* Two-argument form of Fortran ubound/lbound intrinsics.  */
 214 class fortran_bound_2arg
 215   : public tuple_holding_operation<exp_opcode, operation_up, operation_up>
 216 {
 217 public:
 218
 219   using tuple_holding_operation::tuple_holding_operation;
 220
 221   value *evaluate (struct type *expect_type,
 222                    struct expression *exp,
 223                    enum noside noside) override;
 224
 225   enum exp_opcode opcode () const override
 226   { return std::get<0> (m_storage); }
 227 };
 228
 229 } /* namespace expr */
 230
 231 #endif /* FORTRAN_EXP_H */