[PATCHv2 2/4] gdb: Resolve 49 reduce/reduce conflicts in c-exp.y

[Andrew Burgess <andrew.burgess@embecosm.com>]

This commit splits the ptr_operator rule in c-exp.y in two, resolving
49 reduce/reduce conflicts in the process.  There should be no
user visible change after this commit.

There are still 42 shift/reduce and 4 reduce/reduce conflicts
remaining in c-exp.y (using GNU bison 3.0.4).

gdb/ChangeLog:

	* c-exp.y (base_ptr_operator): New rule, with non-recursive
	content taken from...
	(ptr_operator): ...here, leaving just the recursion here.
---
 gdb/ChangeLog |  6 ++++++
 gdb/c-exp.y   | 18 ++++++++----------
 2 files changed, 14 insertions(+), 10 deletions(-)

diff --git a/gdb/c-exp.y b/gdb/c-exp.y
index 447ac78eee1..d2198b1fdf7 100644
--- a/gdb/c-exp.y
+++ b/gdb/c-exp.y
@@ -1136,21 +1136,19 @@ const_or_volatile_or_space_identifier:
 	|
 	;
 
-ptr_operator:
-		ptr_operator '*'
+base_ptr_operator
+	:	'*'
 			{ insert_type (tp_pointer); }
-		const_or_volatile_or_space_identifier
-	|	'*'
-			{ insert_type (tp_pointer); }
-		const_or_volatile_or_space_identifier
+			const_or_volatile_or_space_identifier
 	|	'&'
 			{ insert_type (tp_reference); }
-	|	'&' ptr_operator
-			{ insert_type (tp_reference); }
 	|       ANDAND
 			{ insert_type (tp_rvalue_reference); }
-	|       ANDAND ptr_operator
-			{ insert_type (tp_rvalue_reference); }
+	;
+
+ptr_operator
+	:	base_ptr_operator
+	|	base_ptr_operator base_ptr_operator
 	;
 
 ptr_operator_ts: ptr_operator
-- 
2.14.5