Add support for the Rust language

This patch adds support for the Rust language.

2016-05-17  Tom Tromey  <tom@tromey.com>
	    Manish Goregaokar <manishsmail@gmail.com>

	* symtab.c (symbol_find_demangled_name): Handle Rust.
	* symfile.c (init_filename_language_table): Treat ".rs" as Rust.
	* std-operator.def (STRUCTOP_ANONYMOUS, OP_RUST_ARRAY): New
	constants.
	* rust-lang.h: New file.
	* rust-lang.c: New file.
	* rust-exp.y: New file.
	* dwarf2read.c (read_file_scope): Add Rust producer sniffing.
	(dwarf2_compute_name, read_func_scope, read_structure_type)
	(read_base_type, read_subrange_type, set_cu_language)
	(new_symbol_full, determine_prefix): Handle Rust.
	* defs.h (enum language) <language_rust>: New constant.
	* Makefile.in (SFILES): Add rust-exp.y, rust-lang.c.
	(COMMON_OBS): Add rust-exp.o, rust-lang.o.

2016-05-17  Tom Tromey  <tom@tromey.com>

	* gdb.base/default.exp (set language): Add rust.

1 files changed, 50 insertions, 0 deletions

diff --git a/gdb/rust-lang.h b/gdb/rust-lang.h
new file mode 100644
index 0000000..8cde84a
--- /dev/null
+++ b/gdb/rust-lang.h
@@ -0,0 +1,50 @@
+/* Rust language support definitions for GDB, the GNU debugger.
+
+   Copyright (C) 2016 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_LANG_H
+#define RUST_LANG_H
+
+struct parser_state;
+struct type;
+
+/* The la_parser implementation for Rust.  */
+extern int rust_parse (struct parser_state *);
+
+/* The la_error implementation for Rust.  */
+extern void rustyyerror (char *);
+
+/* Return true if TYPE is a tuple type; otherwise false.  */
+extern int rust_tuple_type_p (struct type *type);
+
+/* Return true if TYPE is a tuple struct type; otherwise false.  */
+extern int rust_tuple_struct_type_p (struct type *type);
+
+/* Given a block, find the name of the block's crate.  The name must
+   be freed by the caller.  Returns NULL if no crate name can be
+   found.  */
+extern char *rust_crate_for_block (const struct block *block);
+
+/* Create a new slice type.  NAME is the name of the type.  ELT_TYPE
+   is the type of the elements of the slice.  USIZE_TYPE is the Rust
+   "usize" type to use.  The new type is allocated whereever ELT_TYPE
+   is allocated.  */
+struct type *rust_slice_type (const char *name, struct type *elt_type,
+			      struct type *usize_type);
+
+#endif /* RUST_LANG_H */