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 /* For (the deleted) Chill and Pascal.  */
  91 OP (BINOP_IN)                   /* Returns 1 iff ARG1 IN ARG2.  */
  92
  93 /* This is the "colon operator" used various places in (the
  94    deleted) Chill.  */
  95 OP (BINOP_RANGE)
  96
  97 /* This must be the highest BINOP_ value, for expprint.c.  */
  98 OP (BINOP_END)
  99
 100 /* Operates on three values computed by following subexpressions.  */
 101 OP (TERNOP_COND)                /* ?: */
 102
 103 /* A sub-string/sub-array.  (the deleted) Chill syntax:
 104    OP1(OP2:OP3).  Return elements OP2 through OP3 of OP1.  */
 105 OP (TERNOP_SLICE)
 106
 107 /* Multidimensional subscript operator, such as Modula-2 x[a,b,...].
 108    The dimensionality is encoded in the operator, like the number of
 109    function arguments in OP_FUNCALL, I.E. <OP><dimension><OP>.
 110    The value of the first following subexpression is subscripted
 111    by each of the next following subexpressions, one per dimension.  */
 112 OP (MULTI_SUBSCRIPT)
 113
 114 /* The OP_... series take immediate following arguments.
 115    After the arguments come another OP_... (the same one)
 116    so that the grouping can be recognized from the end.  */
 117
 118 /* OP_LONG is followed by a type pointer in the next exp_element
 119    and the long constant value in the following exp_element.
 120    Then comes another OP_LONG.
 121    Thus, the operation occupies four exp_elements.  */
 122 OP (OP_LONG)
 123
 124 /* OP_DOUBLE is similar but takes a DOUBLEST constant instead of a
 125    long.  */
 126 OP (OP_DOUBLE)
 127
 128 /* OP_VAR_VALUE takes one struct block * in the following element,
 129    and one struct symbol * in the following exp_element, followed
 130    by another OP_VAR_VALUE, making four exp_elements.  If the
 131    block is non-NULL, evaluate the symbol relative to the
 132    innermost frame executing in that block; if the block is NULL
 133    use the selected frame.  */
 134 OP (OP_VAR_VALUE)
 135
 136 /* OP_VAR_ENTRY_VALUE takes one struct symbol * in the following element,
 137    followed by another OP_VAR_ENTRY_VALUE, making three exp_elements.
 138    somename@entry may mean parameter value as present at the entry of the
 139    current function.  Implemented via DW_OP_GNU_entry_value.  */
 140 OP (OP_VAR_ENTRY_VALUE)
 141
 142 /* OP_LAST is followed by an integer in the next exp_element.
 143    The integer is zero for the last value printed,
 144    or it is the absolute number of a history element.
 145    With another OP_LAST at the end, this makes three exp_elements.  */
 146 OP (OP_LAST)
 147
 148 /* OP_REGISTER is followed by a string in the next exp_element.
 149    This is the name of a register to fetch.  */
 150 OP (OP_REGISTER)
 151
 152 /* OP_INTERNALVAR is followed by an internalvar ptr in the next
 153    exp_element.  With another OP_INTERNALVAR at the end, this
 154    makes three exp_elements.  */
 155 OP (OP_INTERNALVAR)
 156
 157 /* OP_FUNCALL is followed by an integer in the next exp_element.
 158    The integer is the number of args to the function call.
 159    That many plus one values from following subexpressions
 160    are used, the first one being the function.
 161    The integer is followed by a repeat of OP_FUNCALL,
 162    making three exp_elements.  */
 163 OP (OP_FUNCALL)
 164
 165 /* OP_OBJC_MSGCALL is followed by a string in the next exp_element
 166    and then an integer.  The string is the selector string.  The
 167    integer is the number of arguments to the message call.  That
 168    many plus one values are used, the first one being the object
 169    pointer.  This is an Objective C message.  */
 170 OP (OP_OBJC_MSGCALL)
 171
 172 /* This is EXACTLY like OP_FUNCALL but is semantically different.
 173    In F77, array subscript expressions, substring expressions and
 174    function calls are all exactly the same syntactically.  They
 175    may only be disambiguated at runtime.  Thus this operator,
 176    which indicates that we have found something of the form
 177    <name> ( <stuff> ).  */
 178 OP (OP_F77_UNDETERMINED_ARGLIST)
 179
 180 /* OP_COMPLEX takes a type in the following element, followed by another
 181    OP_COMPLEX, making three exp_elements.  It is followed by two double
 182    args, and converts them into a complex number of the given type.  */
 183 OP (OP_COMPLEX)
 184
 185 /* OP_STRING represents a string constant.
 186    Its format is the same as that of a STRUCTOP, but the string
 187    data is just made into a string constant when the operation
 188    is executed.  */
 189 OP (OP_STRING)
 190
 191 /* OP_ARRAY creates an array constant out of the following subexpressions.
 192    It is followed by two exp_elements, the first containing an integer
 193    that is the lower bound of the array and the second containing another
 194    integer that is the upper bound of the array.  The second integer is
 195    followed by a repeat of OP_ARRAY, making four exp_elements total.
 196    The bounds are used to compute the number of following subexpressions
 197    to consume, as well as setting the bounds in the created array constant.
 198    The type of the elements is taken from the type of the first subexp,
 199    and they must all match.  */
 200 OP (OP_ARRAY)
 201
 202 /* UNOP_CAST is followed by a type pointer in the next exp_element.
 203    With another UNOP_CAST at the end, this makes three exp_elements.
 204    It casts the value of the following subexpression.  */
 205 OP (UNOP_CAST)
 206
 207 /* Like UNOP_CAST, but the type is a subexpression.  */
 208 OP (UNOP_CAST_TYPE)
 209
 210 /* The C++ dynamic_cast operator.  */
 211 OP (UNOP_DYNAMIC_CAST)
 212
 213 /* The C++ reinterpret_cast operator.  */
 214 OP (UNOP_REINTERPRET_CAST)
 215
 216 /* UNOP_MEMVAL is followed by a type pointer in the next exp_element
 217    With another UNOP_MEMVAL at the end, this makes three exp_elements.
 218    It casts the contents of the word addressed by the value of the
 219    following subexpression.  */
 220 OP (UNOP_MEMVAL)
 221
 222 /* UNOP_MEMVAL_TLS is followed by a `struct objfile' pointer in the next
 223    exp_element and a type pointer in the following exp_element.
 224    With another UNOP_MEMVAL_TLS at the end, this makes four exp_elements.
 225    It casts the contents of the word offsetted by the value of the
 226    following subexpression from the TLS specified by `struct objfile'.  */
 227 OP (UNOP_MEMVAL_TLS)
 228
 229 /* Like UNOP_MEMVAL, but the type is supplied as a subexpression.  */
 230 OP (UNOP_MEMVAL_TYPE)
 231
 232 /* UNOP_... operate on one value from a following subexpression
 233    and replace it with a result.  They take no immediate arguments.  */
 234
 235 OP (UNOP_NEG)                   /* Unary - */
 236 OP (UNOP_LOGICAL_NOT)           /* Unary ! */
 237 OP (UNOP_COMPLEMENT)            /* Unary ~ */
 238 OP (UNOP_IND)                   /* Unary * */
 239 OP (UNOP_ADDR)                  /* Unary & */
 240 OP (UNOP_PREINCREMENT)          /* ++ before an expression */
 241 OP (UNOP_POSTINCREMENT)         /* ++ after an expression */
 242 OP (UNOP_PREDECREMENT)          /* -- before an expression */
 243 OP (UNOP_POSTDECREMENT)         /* -- after an expression */
 244 OP (UNOP_SIZEOF)                /* Unary sizeof (followed by expression) */
 245
 246 OP (UNOP_PLUS)                  /* Unary plus */
 247
 248 OP (UNOP_CAP)                   /* Modula-2 standard (unary) procedures */
 249 OP (UNOP_CHR)
 250 OP (UNOP_ORD)
 251 OP (UNOP_ABS)
 252 OP (UNOP_FLOAT)
 253 OP (UNOP_HIGH)
 254 OP (UNOP_MAX)
 255 OP (UNOP_MIN)
 256 OP (UNOP_ODD)
 257 OP (UNOP_TRUNC)
 258
 259 OP (OP_BOOL)                    /* Modula-2 builtin BOOLEAN type */
 260 OP (OP_M2_STRING)               /* Modula-2 string constants */
 261
 262 /* STRUCTOP_... operate on a value from a following subexpression
 263    by extracting a structure component specified by a string
 264    that appears in the following exp_elements (as many as needed).
 265    STRUCTOP_STRUCT is used for "." and STRUCTOP_PTR for "->".
 266    They differ only in the error message given in case the value is
 267    not suitable or the structure component specified is not found.
 268
 269    The length of the string follows the opcode, followed by
 270    BYTES_TO_EXP_ELEM(length) elements containing the data of the
 271    string, followed by the length again and the opcode again.  */
 272
 273 OP (STRUCTOP_STRUCT)
 274 OP (STRUCTOP_PTR)
 275
 276 /* C++: OP_THIS is just a placeholder for the class instance variable.
 277    It just comes in a tight (OP_THIS, OP_THIS) pair.  */
 278 OP (OP_THIS)
 279
 280 /* Objective C: "@selector" pseudo-operator.  */
 281 OP (OP_OBJC_SELECTOR)
 282
 283 /* OP_SCOPE surrounds a type name and a field name.  The type
 284    name is encoded as one element, but the field name stays as
 285    a string, which, of course, is variable length.  */
 286 OP (OP_SCOPE)
 287
 288 /* OP_TYPE is for parsing types, and used with the "ptype" command
 289    so we can look up types that are qualified by scope, either with
 290    the GDB "::" operator, or the Modula-2 '.' operator.  */
 291 OP (OP_TYPE)
 292
 293 /* An un-looked-up identifier.  */
 294 OP (OP_NAME)
 295
 296 /* An Objective C Foundation Class NSString constant.  */
 297 OP (OP_OBJC_NSSTRING)
 298
 299 /* A F90 array range operator (for "exp:exp", "exp:", ":exp" and ":").  */
 300 OP (OP_F90_RANGE)
 301
 302 /* OP_DECFLOAT is followed by a type pointer in the next exp_element
 303    and a dec long constant value in the following exp_element.
 304    Then comes another OP_DECFLOAT.  */
 305 OP (OP_DECFLOAT)
 306
 307 /* OP_ADL_FUNC specifies that the function is to be looked up in an
 308    Argument Dependent manner (Koenig lookup).  */
 309 OP (OP_ADL_FUNC)
 310
 311 /* The typeof operator.  This has one expression argument, which is
 312    evaluated solely for its type.  */
 313 OP (OP_TYPEOF)
 314
 315 /* The decltype operator.  This has one expression argument, which is
 316    evaluated solely for its type.  This is similar to typeof, but has
 317    slight different semantics.  */
 318 OP (OP_DECLTYPE)
 319
 320 /* The typeid operator.  This has one expression argument.  */
 321 OP (OP_TYPEID)