gdb/ada-operator.def

   1 /* Ada language operator definitions for GDB, the GNU debugger.
   2
   3    Copyright (C) 1992-2020 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 /* X IN A'RANGE(N).  N is an immediate operand, surrounded by
  21    BINOP_IN_BOUNDS before and after.  A is an array, X an index
  22    value.  Evaluates to true iff X is within range of the Nth
  23    dimension (1-based) of A.  (A multi-dimensional array
  24    type is represented as array of array of ...) */
  25 OP (BINOP_IN_BOUNDS)
  26
  27 /* X IN L .. U.  True iff L <= X <= U.  */
  28 OP (TERNOP_IN_RANGE)
  29
  30 /* Ada attributes ('Foo). */
  31 OP (OP_ATR_FIRST)
  32 OP (OP_ATR_LAST)
  33 OP (OP_ATR_LENGTH)
  34 OP (OP_ATR_IMAGE)
  35 OP (OP_ATR_MAX)
  36 OP (OP_ATR_MIN)
  37 OP (OP_ATR_MODULUS)
  38 OP (OP_ATR_POS)
  39 OP (OP_ATR_SIZE)
  40 OP (OP_ATR_TAG)
  41 OP (OP_ATR_VAL)
  42
  43 /* Ada type qualification.  It is encoded as for UNOP_CAST, above,
  44    and denotes the TYPE'(EXPR) construct. */
  45 OP (UNOP_QUAL)
  46
  47 /* X IN TYPE.  The `TYPE' argument is immediate, with
  48    UNOP_IN_RANGE before and after it. True iff X is a member of
  49    type TYPE (typically a subrange). */
  50 OP (UNOP_IN_RANGE)
  51
  52 /* An aggregate.   A single immediate operand, N>0, gives
  53    the number of component specifications that follow.  The
  54    immediate operand is followed by a second OP_AGGREGATE.
  55    Next come N component specifications.  A component
  56    specification is either an OP_OTHERS (others=>...), an
  57    OP_CHOICES (for named associations), or other expression (for
  58    positional aggregates only).  Aggregates currently
  59    occur only as the right sides of assignments. */
  60 OP (OP_AGGREGATE)
  61
  62 /* An others clause.  Followed by a single expression. */
  63 OP (OP_OTHERS)
  64
  65 /* An aggregate component association.  A single immediate operand, N,
  66    gives the number of choices that follow.  This is followed by a second
  67    OP_CHOICES operator.  Next come N operands, each of which is an
  68    expression, an OP_DISCRETE_RANGE, or an OP_NAME---the latter
  69    for a simple name that must be a record component name and does
  70    not correspond to a single existing symbol.  After the N choice
  71    indicators comes an expression giving the value.
  72
  73    In an aggregate such as (X => E1, ...), where X is a simple
  74    name, X could syntactically be either a component_selector_name
  75    or an expression used as a discrete_choice, depending on the
  76    aggregate's type context.  Since this is not known at parsing
  77    time, we don't attempt to disambiguate X if it has multiple
  78    definitions, but instead supply an OP_NAME.  If X has a single
  79    definition, we represent it with an OP_VAR_VALUE, even though
  80    it may turn out to be within a record aggregate.  Aggregate
  81    evaluation can use either OP_NAMEs or OP_VAR_VALUEs to get a
  82    record field name, and can evaluate OP_VAR_VALUE normally to
  83    get its value as an expression.  Unfortunately, we lose out in
  84    cases where X has multiple meanings and is part of an array
  85    aggregate.  I hope these are not common enough to annoy users,
  86    who can work around the problem in any case by putting
  87    parentheses around X. */
  88 OP (OP_CHOICES)
  89
  90 /* A positional aggregate component association.  The operator is
  91    followed by a single integer indicating the position in the
  92    aggregate (0-based), followed by a second OP_POSITIONAL.  Next
  93    follows a single expression giving the component value.  */
  94 OP (OP_POSITIONAL)
  95
  96 /* A range of values.  Followed by two expressions giving the
  97    upper and lower bounds of the range. */
  98 OP (OP_DISCRETE_RANGE)