Implement Ada 2022 iterated assignment

Ada 2022 includes iterated assignment for array initialization.  This
patch implements a subset of this for gdb.  In particular, only arrays
with integer index types really work -- currently there's no decent
way to get the index type in EVAL_AVOID_SIDE_EFFECTS mode during
parsing.  Fixing this probably requires the Ada parser to take a
somewhat more sophisticated approach to type resolution; and while
this would help fix another bug in this area, this patch is already
useful without it.

4 files changed, 110 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.ada/iterated-assign.exp b/gdb/testsuite/gdb.ada/iterated-assign.exp
new file mode 100644
index 0000000..76b038f
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/iterated-assign.exp
@@ -0,0 +1,37 @@
+# Copyright 2024 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+load_lib "ada.exp"
+
+require allow_ada_tests
+
+standard_ada_testfile main
+
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug]] != "" } {
+    return -1
+}
+
+clean_restart ${testfile}
+
+set bp_location [gdb_get_line_number "STOP" ${testdir}/main.adb]
+runto "main.adb:$bp_location"
+
+gdb_test "print a1 := (for i in 1..4 => 2 * i + 1)" \
+    " = \\(3, 5, 7, 9\\)" \
+    "simple iterated assignment"
+
+gdb_test "print a2 := (for i in 1..2 => (for j in 1..2 => 3 * i + j))" \
+    " = \\(\\(4, 5\\), \\(7, 8\\)\\)" \
+    "nested iterated assignment"
diff --git a/gdb/testsuite/gdb.ada/iterated-assign/main.adb b/gdb/testsuite/gdb.ada/iterated-assign/main.adb
new file mode 100644
index 0000000..239c22c
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/iterated-assign/main.adb
@@ -0,0 +1,24 @@
+--  Copyright 2024 Free Software Foundation, Inc.
+--
+--  This program is free software; you can redistribute it and/or modify
+--  it under the terms of the GNU General Public License as published by
+--  the Free Software Foundation; either version 3 of the License, or
+--  (at your option) any later version.
+--
+--  This program is distributed in the hope that it will be useful,
+--  but WITHOUT ANY WARRANTY; without even the implied warranty of
+--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--  GNU General Public License for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+with pck; use pck;
+
+procedure Main is
+   A1 : Other_Array_Type := (2, 4, 6, 8);
+   A2 : MD_Array_Type := ((1, 2), (3, 4));
+begin
+   Do_Nothing (A1'Address);  -- STOP
+   Do_Nothing (A2'Address);
+end Main;
diff --git a/gdb/testsuite/gdb.ada/iterated-assign/pck.adb b/gdb/testsuite/gdb.ada/iterated-assign/pck.adb
new file mode 100644
index 0000000..14580e6
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/iterated-assign/pck.adb
@@ -0,0 +1,23 @@
+--  Copyright 2024 Free Software Foundation, Inc.
+--
+--  This program is free software; you can redistribute it and/or modify
+--  it under the terms of the GNU General Public License as published by
+--  the Free Software Foundation; either version 3 of the License, or
+--  (at your option) any later version.
+--
+--  This program is distributed in the hope that it will be useful,
+--  but WITHOUT ANY WARRANTY; without even the implied warranty of
+--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--  GNU General Public License for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package body Pck is
+
+   procedure Do_Nothing (A : System.Address) is
+   begin
+      null;
+   end Do_Nothing;
+
+end Pck;
diff --git a/gdb/testsuite/gdb.ada/iterated-assign/pck.ads b/gdb/testsuite/gdb.ada/iterated-assign/pck.ads
new file mode 100644
index 0000000..b77af72
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/iterated-assign/pck.ads
@@ -0,0 +1,26 @@
+--  Copyright 2024 Free Software Foundation, Inc.
+--
+--  This program is free software; you can redistribute it and/or modify
+--  it under the terms of the GNU General Public License as published by
+--  the Free Software Foundation; either version 3 of the License, or
+--  (at your option) any later version.
+--
+--  This program is distributed in the hope that it will be useful,
+--  but WITHOUT ANY WARRANTY; without even the implied warranty of
+--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+--  GNU General Public License for more details.
+--
+--  You should have received a copy of the GNU General Public License
+--  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+with System;
+
+package Pck is
+
+   type Other_Array_Type is array (1 .. 4) of Integer;
+
+   type MD_Array_Type is array (1 .. 2, 1 .. 2) of Integer;
+
+   procedure Do_Nothing (A : System.Address);
+
+end Pck;