Implement some Rust operations

This implements some straightforward Rust operations, using existing
template classes.

gdb/ChangeLog
2021-03-08  Tom Tromey  <tom@tromey.com>

	* rust-lang.c (eval_op_rust_complement, eval_op_rust_array): No
	longer static.  Add "opcode" parameter.
	(rust_evaluate_subexp): Update.
	* rust-exp.h: New file.

1 files changed, 47 insertions, 0 deletions

diff --git a/gdb/rust-exp.h b/gdb/rust-exp.h
new file mode 100644
index 0000000..cce1fd9
--- /dev/null
+++ b/gdb/rust-exp.h
@@ -0,0 +1,47 @@
+/* Definitions for Rust expressions
+
+   Copyright (C) 2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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/>.  */
+
+#ifndef RUST_EXP_H
+#define RUST_EXP_H
+
+#include "expop.h"
+
+extern struct value *eval_op_rust_complement (struct type *expect_type,
+					      struct expression *exp,
+					      enum noside noside,
+					      enum exp_opcode opcode,
+					      struct value *value);
+extern struct value *eval_op_rust_array (struct type *expect_type,
+					 struct expression *exp,
+					 enum noside noside,
+					 enum exp_opcode opcode,
+					 struct value *ncopies,
+					 struct value *elt);
+
+namespace expr
+{
+
+using rust_unop_compl_operation = unop_operation<UNOP_COMPLEMENT,
+						  eval_op_rust_complement>;
+using rust_array_operation = binop_operation<OP_RUST_ARRAY,
+					     eval_op_rust_array>;
+
+} /* namespace expr */
+
+#endif /* RUST_EXP_H */