gdb/std-operator.def

   1 /* Standard language operator definitions for GDB, the GNU debugger.
   2
   3    Copyright (C) 1986, 1989, 1992, 1994, 2000, 2003, 2005, 2007, 2008, 2009,
   4    2010, 2011 Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* Used when it's necessary to pass an opcode which will be ignored,
  22    or to catch uninitialized values.  */
  23 OP (OP_NULL)
  24
  25 /* BINOP_... operate on two values computed by following subexpressions,
  26 replacing them by one result value.  They take no immediate arguments.  */
  27
  28 OP (BINOP_ADD)                  /* + */
  29 OP (BINOP_SUB)                  /* - */
  30 OP (BINOP_MUL)                  /* * */
  31 OP (BINOP_DIV)                  /* / */
  32 OP (BINOP_REM)                  /* % */
  33 OP (BINOP_MOD)                  /* mod (Knuth 1.2.4) */
  34 OP (BINOP_LSH)                  /* << */
  35 OP (BINOP_RSH)                  /* >> */
  36 OP (BINOP_LOGICAL_AND)          /* && */
  37 OP (BINOP_LOGICAL_OR)           /* || */
  38 OP (BINOP_BITWISE_AND)          /* & */
  39 OP (BINOP_BITWISE_IOR)          /* | */
  40 OP (BINOP_BITWISE_XOR)          /* ^ */
  41 OP (BINOP_EQUAL)                /* == */
  42 OP (BINOP_NOTEQUAL)             /* != */
  43 OP (BINOP_LESS)                 /* < */
  44 OP (BINOP_GTR)                  /* > */
  45 OP (BINOP_LEQ)                  /* <= */
  46 OP (BINOP_GEQ)                  /* >= */
  47 OP (BINOP_REPEAT)               /* @ */
  48 OP (BINOP_ASSIGN)               /* = */
  49 OP (BINOP_COMMA)                /* , */
  50 OP (BINOP_SUBSCRIPT)            /* x[y] */
  51 OP (BINOP_EXP)                  /* Exponentiation */
  52
  53 /* C++.  */
  54
  55 OP (BINOP_MIN)                  /* <? */
  56 OP (BINOP_MAX)                  /* >? */
  57
  58 /* STRUCTOP_MEMBER is used for pointer-to-member constructs.
  59    X .  * Y translates into X STRUCTOP_MEMBER Y.  */
  60 OP (STRUCTOP_MEMBER)
  61
  62 /* STRUCTOP_MPTR is used for pointer-to-member constructs
  63    when X is a pointer instead of an aggregate.  */
  64 OP (STRUCTOP_MPTR)
  65
  66 /* TYPE_INSTANCE is used when the user specifies a specific
  67    type instantiation for overloaded methods/functions.
  68
  69    The format is:
  70    TYPE_INSTANCE num_types type0 ... typeN num_types TYPE_INSTANCE.  */
  71 OP (TYPE_INSTANCE)
  72
  73 /* end of C++.  */
  74
  75 /* For Modula-2 integer division DIV.  */
  76 OP (BINOP_INTDIV)
  77
  78 /* +=, -=, *=, and so on.  The following exp_element is another opcode,
  79    a BINOP_, saying how to modify.  Then comes another BINOP_ASSIGN_MODIFY,
  80    making three exp_elements in total.  */
  81 OP (BINOP_ASSIGN_MODIFY)
  82
  83 /* Modula-2 standard (binary) procedures.  */
  84 OP (BINOP_VAL)
  85
  86 /* Concatenate two operands, such as character strings or bitstrings.
  87    If the first operand is a integer expression, then it means concatenate
  88    the second operand with itself that many times.  */
  89 OP (BINOP_CONCAT)
  90
  91 /* For (the deleted) Chill and Pascal.  */
  92 OP (BINOP_IN)                   /* Returns 1 iff ARG1 IN ARG2.  */
  93
  94 /* This is the "colon operator" used various places in (the
  95    deleted) Chill.  */
  96 OP (BINOP_RANGE)
  97
  98 /* This must be the highest BINOP_ value, for expprint.c.  */
  99 OP (BINOP_END)
 100
 101 /* Operates on three values computed by following subexpressions.  */
 102 OP (TERNOP_COND)                /* ?: */
 103
 104 /* A sub-string/sub-array.  (the deleted) Chill syntax:
 105    OP1(OP2:OP3).  Return elements OP2 through OP3 of OP1.  */
 106 OP (TERNOP_SLICE)
 107
 108 /* A sub-string/sub-array.  (The deleted) Chill syntax: OP1(OP2 UP
 109    OP3).  Return OP3 elements of OP1, starting with element
 110    OP2.  */
 111 OP (TERNOP_SLICE_COUNT)
 112
 113 /* Multidimensional subscript operator, such as Modula-2 x[a,b,...].
 114    The dimensionality is encoded in the operator, like the number of
 115    function arguments in OP_FUNCALL, I.E. <OP><dimension><OP>.
 116    The value of the first following subexpression is subscripted
 117    by each of the next following subexpressions, one per dimension.  */
 118 OP (MULTI_SUBSCRIPT)
 119
 120 /* The OP_... series take immediate following arguments.
 121    After the arguments come another OP_... (the same one)
 122    so that the grouping can be recognized from the end.  */
 123
 124 /* OP_LONG is followed by a type pointer in the next exp_element
 125    and the long constant value in the following exp_element.
 126    Then comes another OP_LONG.
 127    Thus, the operation occupies four exp_elements.  */
 128 OP (OP_LONG)
 129
 130 /* OP_DOUBLE is similar but takes a DOUBLEST constant instead of a
 131    long.  */
 132 OP (OP_DOUBLE)
 133
 134 /* OP_VAR_VALUE takes one struct block * in the following element,
 135    and one struct symbol * in the following exp_element, followed
 136    by another OP_VAR_VALUE, making four exp_elements.  If the
 137    block is non-NULL, evaluate the symbol relative to the
 138    innermost frame executing in that block; if the block is NULL
 139    use the selected frame.  */
 140 OP (OP_VAR_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_BITSTRING represents a packed bitstring constant.
 192    Its format is the same as that of a STRUCTOP, but the bitstring
 193    data is just made into a bitstring constant when the operation
 194    is executed.  */
 195 OP (OP_BITSTRING)
 196
 197 /* OP_ARRAY creates an array constant out of the following subexpressions.
 198    It is followed by two exp_elements, the first containing an integer
 199    that is the lower bound of the array and the second containing another
 200    integer that is the upper bound of the array.  The second integer is
 201    followed by a repeat of OP_ARRAY, making four exp_elements total.
 202    The bounds are used to compute the number of following subexpressions
 203    to consume, as well as setting the bounds in the created array constant.
 204    The type of the elements is taken from the type of the first subexp,
 205    and they must all match.  */
 206 OP (OP_ARRAY)
 207
 208 /* UNOP_CAST is followed by a type pointer in the next exp_element.
 209    With another UNOP_CAST at the end, this makes three exp_elements.
 210    It casts the value of the following subexpression.  */
 211 OP (UNOP_CAST)
 212
 213 /* The C++ dynamic_cast operator.  */
 214 OP (UNOP_DYNAMIC_CAST)
 215
 216 /* The C++ reinterpret_cast operator.  */
 217 OP (UNOP_REINTERPRET_CAST)
 218
 219 /* UNOP_MEMVAL is followed by a type pointer in the next exp_element
 220    With another UNOP_MEMVAL at the end, this makes three exp_elements.
 221    It casts the contents of the word addressed by the value of the
 222    following subexpression.  */
 223 OP (UNOP_MEMVAL)
 224
 225 /* UNOP_MEMVAL_TLS is followed by a `struct objfile' pointer in the next
 226    exp_element and a type pointer in the following exp_element.
 227    With another UNOP_MEMVAL_TLS at the end, this makes four exp_elements.
 228    It casts the contents of the word offsetted by the value of the
 229    following subexpression from the TLS specified by `struct objfile'.  */
 230 OP (UNOP_MEMVAL_TLS)
 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: OP_OBJC_SELF is just a placeholder for the class
 281    instance variable.  It just comes in a tight (OP_OBJC_SELF,
 282    OP_OBJC_SELF) pair.  */
 283 OP (OP_OBJC_SELF)
 284
 285 /* Objective C: "@selector" pseudo-operator.  */
 286 OP (OP_OBJC_SELECTOR)
 287
 288 /* OP_SCOPE surrounds a type name and a field name.  The type
 289    name is encoded as one element, but the field name stays as
 290    a string, which, of course, is variable length.  */
 291 OP (OP_SCOPE)
 292
 293 /* Used to represent named structure field values in brace
 294    initializers (or tuples as they are called in (the deleted)
 295    Chill).
 296
 297    The gcc C syntax is NAME:VALUE or .NAME=VALUE, the (the
 298    deleted) Chill syntax is .NAME:VALUE.  Multiple labels (as in
 299    the (the deleted) Chill syntax .NAME1,.NAME2:VALUE) is
 300    represented as if it were .NAME1:(.NAME2:VALUE) (though that is
 301    not valid (the deleted) Chill syntax).
 302
 303    The NAME is represented as for STRUCTOP_STRUCT;  VALUE follows.  */
 304 OP (OP_LABELED)
 305
 306 /* OP_TYPE is for parsing types, and used with the "ptype" command
 307    so we can look up types that are qualified by scope, either with
 308    the GDB "::" operator, or the Modula-2 '.' operator.  */
 309 OP (OP_TYPE)
 310
 311 /* An un-looked-up identifier.  */
 312 OP (OP_NAME)
 313
 314 /* An Objective C Foundation Class NSString constant.  */
 315 OP (OP_OBJC_NSSTRING)
 316
 317 /* A F90 array range operator (for "exp:exp", "exp:", ":exp" and ":").  */
 318 OP (OP_F90_RANGE)
 319
 320 /* OP_DECFLOAT is followed by a type pointer in the next exp_element
 321    and a dec long constant value in the following exp_element.
 322    Then comes another OP_DECFLOAT.  */
 323 OP (OP_DECFLOAT)
 324
 325 /* OP_ADL_FUNC specifies that the function is to be looked up in an
 326    Argument Dependent manner (Koenig lookup).  */
 327 OP (OP_ADL_FUNC)