gdb/std-operator.def

   1 /* Standard language operator definitions for GDB, the GNU debugger.
   2
   3    Copyright (C) 1986-2014 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 /* Used when it's necessary to pass an opcode which will be ignored,
  21    or to catch uninitialized values.  */
  22 OP (OP_NULL)
  23
  24 /* BINOP_... operate on two values computed by following subexpressions,
  25 replacing them by one result value.  They take no immediate arguments.  */
  26
  27 OP (BINOP_ADD)                  /* + */
  28 OP (BINOP_SUB)                  /* - */
  29 OP (BINOP_MUL)                  /* * */
  30 OP (BINOP_DIV)                  /* / */
  31 OP (BINOP_REM)                  /* % */
  32 OP (BINOP_MOD)                  /* mod (Knuth 1.2.4) */
  33 OP (BINOP_LSH)                  /* << */
  34 OP (BINOP_RSH)                  /* >> */
  35 OP (BINOP_LOGICAL_AND)          /* && */
  36 OP (BINOP_LOGICAL_OR)           /* || */
  37 OP (BINOP_BITWISE_AND)          /* & */
  38 OP (BINOP_BITWISE_IOR)          /* | */
  39 OP (BINOP_BITWISE_XOR)          /* ^ */
  40 OP (BINOP_EQUAL)                /* == */
  41 OP (BINOP_NOTEQUAL)             /* != */
  42 OP (BINOP_LESS)                 /* < */
  43 OP (BINOP_GTR)                  /* > */
  44 OP (BINOP_LEQ)                  /* <= */
  45 OP (BINOP_GEQ)                  /* >= */
  46 OP (BINOP_REPEAT)               /* @ */
  47 OP (BINOP_ASSIGN)               /* = */
  48 OP (BINOP_COMMA)                /* , */
  49 OP (BINOP_SUBSCRIPT)            /* x[y] */
  50 OP (BINOP_EXP)                  /* Exponentiation */
  51
  52 /* C++.  */
  53
  54 OP (BINOP_MIN)                  /* <? */
  55 OP (BINOP_MAX)                  /* >? */
  56
  57 /* STRUCTOP_MEMBER is used for pointer-to-member constructs.
  58    X .  * Y translates into X STRUCTOP_MEMBER Y.  */
  59 OP (STRUCTOP_MEMBER)
  60
  61 /* STRUCTOP_MPTR is used for pointer-to-member constructs
  62    when X is a pointer instead of an aggregate.  */
  63 OP (STRUCTOP_MPTR)
  64
  65 /* TYPE_INSTANCE is used when the user specifies a specific
  66    type instantiation for overloaded methods/functions.
  67
  68    The format is:
  69    TYPE_INSTANCE num_types type0 ... typeN num_types TYPE_INSTANCE.  */
  70 OP (TYPE_INSTANCE)
  71
  72 /* end of C++.  */
  73
  74 /* For Modula-2 integer division DIV.  */
  75 OP (BINOP_INTDIV)
  76
  77 /* +=, -=, *=, and so on.  The following exp_element is another opcode,
  78    a BINOP_, saying how to modify.  Then comes another BINOP_ASSIGN_MODIFY,
  79    making three exp_elements in total.  */
  80 OP (BINOP_ASSIGN_MODIFY)
  81
  82 /* Modula-2 standard (binary) procedures.  */
  83 OP (BINOP_VAL)
  84
  85 /* Concatenate two operands, such as character strings or bitstrings.
  86    If the first operand is a integer expression, then it means concatenate
  87    the second operand with itself that many times.  */
  88 OP (BINOP_CONCAT)
  89
  90 /* This is the "colon operator" used various places in (the
  91    deleted) Chill.  */
  92 OP (BINOP_RANGE)
  93
  94 /* This must be the highest BINOP_ value, for expprint.c.  */
  95 OP (BINOP_END)
  96
  97 /* Operates on three values computed by following subexpressions.  */
  98 OP (TERNOP_COND)                /* ?: */
  99
 100 /* A sub-string/sub-array.  (the deleted) Chill syntax:
 101    OP1(OP2:OP3).  Return elements OP2 through OP3 of OP1.  */
 102 OP (TERNOP_SLICE)
 103
 104 /* Multidimensional subscript operator, such as Modula-2 x[a,b,...].
 105    The dimensionality is encoded in the operator, like the number of
 106    function arguments in OP_FUNCALL, I.E. <OP><dimension><OP>.
 107    The value of the first following subexpression is subscripted
 108    by each of the next following subexpressions, one per dimension.  */
 109 OP (MULTI_SUBSCRIPT)
 110
 111 /* The OP_... series take immediate following arguments.
 112    After the arguments come another OP_... (the same one)
 113    so that the grouping can be recognized from the end.  */
 114
 115 /* OP_LONG is followed by a type pointer in the next exp_element
 116    and the long constant value in the following exp_element.
 117    Then comes another OP_LONG.
 118    Thus, the operation occupies four exp_elements.  */
 119 OP (OP_LONG)
 120
 121 /* OP_DOUBLE is similar but takes a DOUBLEST constant instead of a
 122    long.  */
 123 OP (OP_DOUBLE)
 124
 125 /* OP_VAR_VALUE takes one struct block * in the following element,
 126    and one struct symbol * in the following exp_element, followed
 127    by another OP_VAR_VALUE, making four exp_elements.  If the
 128    block is non-NULL, evaluate the symbol relative to the
 129    innermost frame executing in that block; if the block is NULL
 130    use the selected frame.  */
 131 OP (OP_VAR_VALUE)
 132
 133 /* OP_VAR_ENTRY_VALUE takes one struct symbol * in the following element,
 134    followed by another OP_VAR_ENTRY_VALUE, making three exp_elements.
 135    somename@entry may mean parameter value as present at the entry of the
 136    current function.  Implemented via DW_OP_GNU_entry_value.  */
 137 OP (OP_VAR_ENTRY_VALUE)
 138
 139 /* OP_LAST is followed by an integer in the next exp_element.
 140    The integer is zero for the last value printed,
 141    or it is the absolute number of a history element.
 142    With another OP_LAST at the end, this makes three exp_elements.  */
 143 OP (OP_LAST)
 144
 145 /* OP_REGISTER is followed by a string in the next exp_element.
 146    This is the name of a register to fetch.  */
 147 OP (OP_REGISTER)
 148
 149 /* OP_INTERNALVAR is followed by an internalvar ptr in the next
 150    exp_element.  With another OP_INTERNALVAR at the end, this
 151    makes three exp_elements.  */
 152 OP (OP_INTERNALVAR)
 153
 154 /* OP_FUNCALL is followed by an integer in the next exp_element.
 155    The integer is the number of args to the function call.
 156    That many plus one values from following subexpressions
 157    are used, the first one being the function.
 158    The integer is followed by a repeat of OP_FUNCALL,
 159    making three exp_elements.  */
 160 OP (OP_FUNCALL)
 161
 162 /* OP_OBJC_MSGCALL is followed by a string in the next exp_element
 163    and then an integer.  The string is the selector string.  The
 164    integer is the number of arguments to the message call.  That
 165    many plus one values are used, the first one being the object
 166    pointer.  This is an Objective C message.  */
 167 OP (OP_OBJC_MSGCALL)
 168
 169 /* This is EXACTLY like OP_FUNCALL but is semantically different.
 170    In F77, array subscript expressions, substring expressions and
 171    function calls are all exactly the same syntactically.  They
 172    may only be disambiguated at runtime.  Thus this operator,
 173    which indicates that we have found something of the form
 174    <name> ( <stuff> ).  */
 175 OP (OP_F77_UNDETERMINED_ARGLIST)
 176
 177 /* OP_COMPLEX takes a type in the following element, followed by another
 178    OP_COMPLEX, making three exp_elements.  It is followed by two double
 179    args, and converts them into a complex number of the given type.  */
 180 OP (OP_COMPLEX)
 181
 182 /* OP_STRING represents a string constant.
 183    Its format is the same as that of a STRUCTOP, but the string
 184    data is just made into a string constant when the operation
 185    is executed.  */
 186 OP (OP_STRING)
 187
 188 /* OP_ARRAY creates an array constant out of the following subexpressions.
 189    It is followed by two exp_elements, the first containing an integer
 190    that is the lower bound of the array and the second containing another
 191    integer that is the upper bound of the array.  The second integer is
 192    followed by a repeat of OP_ARRAY, making four exp_elements total.
 193    The bounds are used to compute the number of following subexpressions
 194    to consume, as well as setting the bounds in the created array constant.
 195    The type of the elements is taken from the type of the first subexp,
 196    and they must all match.  */
 197 OP (OP_ARRAY)
 198
 199 /* UNOP_CAST is followed by a type pointer in the next exp_element.
 200    With another UNOP_CAST at the end, this makes three exp_elements.
 201    It casts the value of the following subexpression.  */
 202 OP (UNOP_CAST)
 203
 204 /* Like UNOP_CAST, but the type is a subexpression.  */
 205 OP (UNOP_CAST_TYPE)
 206
 207 /* The C++ dynamic_cast operator.  */
 208 OP (UNOP_DYNAMIC_CAST)
 209
 210 /* The C++ reinterpret_cast operator.  */
 211 OP (UNOP_REINTERPRET_CAST)
 212
 213 /* UNOP_MEMVAL is followed by a type pointer in the next exp_element
 214    With another UNOP_MEMVAL at the end, this makes three exp_elements.
 215    It casts the contents of the word addressed by the value of the
 216    following subexpression.  */
 217 OP (UNOP_MEMVAL)
 218
 219 /* UNOP_MEMVAL_TLS is followed by a `struct objfile' pointer in the next
 220    exp_element and a type pointer in the following exp_element.
 221    With another UNOP_MEMVAL_TLS at the end, this makes four exp_elements.
 222    It casts the contents of the word offsetted by the value of the
 223    following subexpression from the TLS specified by `struct objfile'.  */
 224 OP (UNOP_MEMVAL_TLS)
 225
 226 /* Like UNOP_MEMVAL, but the type is supplied as a subexpression.  */
 227 OP (UNOP_MEMVAL_TYPE)
 228
 229 /* UNOP_... operate on one value from a following subexpression
 230    and replace it with a result.  They take no immediate arguments.  */
 231
 232 OP (UNOP_NEG)                   /* Unary - */
 233 OP (UNOP_LOGICAL_NOT)           /* Unary ! */
 234 OP (UNOP_COMPLEMENT)            /* Unary ~ */
 235 OP (UNOP_IND)                   /* Unary * */
 236 OP (UNOP_ADDR)                  /* Unary & */
 237 OP (UNOP_PREINCREMENT)          /* ++ before an expression */
 238 OP (UNOP_POSTINCREMENT)         /* ++ after an expression */
 239 OP (UNOP_PREDECREMENT)          /* -- before an expression */
 240 OP (UNOP_POSTDECREMENT)         /* -- after an expression */
 241 OP (UNOP_SIZEOF)                /* Unary sizeof (followed by expression) */
 242
 243 OP (UNOP_PLUS)                  /* Unary plus */
 244
 245 OP (UNOP_CAP)                   /* Modula-2 standard (unary) procedures */
 246 OP (UNOP_CHR)
 247 OP (UNOP_ORD)
 248 OP (UNOP_ABS)
 249 OP (UNOP_FLOAT)
 250 OP (UNOP_HIGH)
 251 OP (UNOP_MAX)
 252 OP (UNOP_MIN)
 253 OP (UNOP_ODD)
 254 OP (UNOP_TRUNC)
 255
 256 OP (OP_BOOL)                    /* Modula-2 builtin BOOLEAN type */
 257 OP (OP_M2_STRING)               /* Modula-2 string constants */
 258
 259 /* STRUCTOP_... operate on a value from a following subexpression
 260    by extracting a structure component specified by a string
 261    that appears in the following exp_elements (as many as needed).
 262    STRUCTOP_STRUCT is used for "." and STRUCTOP_PTR for "->".
 263    They differ only in the error message given in case the value is
 264    not suitable or the structure component specified is not found.
 265
 266    The length of the string follows the opcode, followed by
 267    BYTES_TO_EXP_ELEM(length) elements containing the data of the
 268    string, followed by the length again and the opcode again.  */
 269
 270 OP (STRUCTOP_STRUCT)
 271 OP (STRUCTOP_PTR)
 272
 273 /* C++: OP_THIS is just a placeholder for the class instance variable.
 274    It just comes in a tight (OP_THIS, OP_THIS) pair.  */
 275 OP (OP_THIS)
 276
 277 /* Objective C: "@selector" pseudo-operator.  */
 278 OP (OP_OBJC_SELECTOR)
 279
 280 /* OP_SCOPE surrounds a type name and a field name.  The type
 281    name is encoded as one element, but the field name stays as
 282    a string, which, of course, is variable length.  */
 283 OP (OP_SCOPE)
 284
 285 /* OP_TYPE is for parsing types, and used with the "ptype" command
 286    so we can look up types that are qualified by scope, either with
 287    the GDB "::" operator, or the Modula-2 '.' operator.  */
 288 OP (OP_TYPE)
 289
 290 /* An un-looked-up identifier.  */
 291 OP (OP_NAME)
 292
 293 /* An Objective C Foundation Class NSString constant.  */
 294 OP (OP_OBJC_NSSTRING)
 295
 296 /* A F90 array range operator (for "exp:exp", "exp:", ":exp" and ":").  */
 297 OP (OP_F90_RANGE)
 298
 299 /* OP_DECFLOAT is followed by a type pointer in the next exp_element
 300    and a dec long constant value in the following exp_element.
 301    Then comes another OP_DECFLOAT.  */
 302 OP (OP_DECFLOAT)
 303
 304 /* OP_ADL_FUNC specifies that the function is to be looked up in an
 305    Argument Dependent manner (Koenig lookup).  */
 306 OP (OP_ADL_FUNC)
 307
 308 /* The typeof operator.  This has one expression argument, which is
 309    evaluated solely for its type.  */
 310 OP (OP_TYPEOF)
 311
 312 /* The decltype operator.  This has one expression argument, which is
 313    evaluated solely for its type.  This is similar to typeof, but has
 314    slight different semantics.  */
 315 OP (OP_DECLTYPE)
 316
 317 /* The typeid operator.  This has one expression argument.  */
 318 OP (OP_TYPEID)