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100 lines
4.0 KiB
Modula-2
100 lines
4.0 KiB
Modula-2
/* Ada language operator definitions for GDB, the GNU debugger.
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Copyright (C) 1992, 1997-2005, 2007-2012 Free Software Foundation,
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Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* X IN A'RANGE(N). N is an immediate operand, surrounded by
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BINOP_IN_BOUNDS before and after. A is an array, X an index
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value. Evaluates to true iff X is within range of the Nth
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dimension (1-based) of A. (A multi-dimensional array
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type is represented as array of array of ...) */
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OP (BINOP_IN_BOUNDS)
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/* X IN L .. U. True iff L <= X <= U. */
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OP (TERNOP_IN_RANGE)
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/* Ada attributes ('Foo). */
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OP (OP_ATR_FIRST)
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OP (OP_ATR_LAST)
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OP (OP_ATR_LENGTH)
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OP (OP_ATR_IMAGE)
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OP (OP_ATR_MAX)
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OP (OP_ATR_MIN)
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OP (OP_ATR_MODULUS)
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OP (OP_ATR_POS)
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OP (OP_ATR_SIZE)
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OP (OP_ATR_TAG)
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OP (OP_ATR_VAL)
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/* Ada type qualification. It is encoded as for UNOP_CAST, above,
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and denotes the TYPE'(EXPR) construct. */
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OP (UNOP_QUAL)
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/* X IN TYPE. The `TYPE' argument is immediate, with
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UNOP_IN_RANGE before and after it. True iff X is a member of
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type TYPE (typically a subrange). */
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OP (UNOP_IN_RANGE)
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/* An aggregate. A single immediate operand, N>0, gives
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the number of component specifications that follow. The
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immediate operand is followed by a second OP_AGGREGATE.
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Next come N component specifications. A component
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specification is either an OP_OTHERS (others=>...), an
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OP_CHOICES (for named associations), or other expression (for
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positional aggregates only). Aggregates currently
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occur only as the right sides of assignments. */
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OP (OP_AGGREGATE)
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/* An others clause. Followed by a single expression. */
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OP (OP_OTHERS)
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/* An aggregate component association. A single immediate operand, N,
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gives the number of choices that follow. This is followed by a second
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OP_CHOICES operator. Next come N operands, each of which is an
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expression, an OP_DISCRETE_RANGE, or an OP_NAME---the latter
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for a simple name that must be a record component name and does
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not correspond to a single existing symbol. After the N choice
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indicators comes an expression giving the value.
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In an aggregate such as (X => E1, ...), where X is a simple
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name, X could syntactically be either a component_selector_name
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or an expression used as a discrete_choice, depending on the
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aggregate's type context. Since this is not known at parsing
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time, we don't attempt to disambiguate X if it has multiple
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definitions, but instead supply an OP_NAME. If X has a single
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definition, we represent it with an OP_VAR_VALUE, even though
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it may turn out to be within a record aggregate. Aggregate
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evaluation can use either OP_NAMEs or OP_VAR_VALUEs to get a
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record field name, and can evaluate OP_VAR_VALUE normally to
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get its value as an expression. Unfortunately, we lose out in
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cases where X has multiple meanings and is part of an array
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aggregate. I hope these are not common enough to annoy users,
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who can work around the problem in any case by putting
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parentheses around X. */
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OP (OP_CHOICES)
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/* A positional aggregate component association. The operator is
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followed by a single integer indicating the position in the
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aggregate (0-based), followed by a second OP_POSITIONAL. Next
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follows a single expression giving the component value. */
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OP (OP_POSITIONAL)
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/* A range of values. Followed by two expressions giving the
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upper and lower bounds of the range. */
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OP (OP_DISCRETE_RANGE)
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