Allow subscripting raw pointers

This will be useful for dealing with vectors; regardless of our final solution
for the Index trait.

2016-07-06  Manish Goregaokar  <manish@mozilla.com>

gdb/ChangeLog:
    * rust-lang.c (rust_subscript): Allow subscripting pointers

gdb/testsuite/ChangeLog:
    * simple.rs: Add test for raw pointer subscripting
    * simple.exp: Add test expectations

1 files changed, 1 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.rust/simple.rs b/gdb/testsuite/gdb.rust/simple.rs
index 3d28e27..4980826 100644
--- a/gdb/testsuite/gdb.rust/simple.rs
+++ b/gdb/testsuite/gdb.rust/simple.rs
@@ -87,6 +87,7 @@ fn main () {
 
     let v = Something::Three;
     let w = [1,2,3,4];
+    let w_ptr = &w[0];
     let x = (23, 25.5);
     let y = HiBob {field1: 7, field2: 8};
     let z = ByeBob(7, 8);