[COMMITTED 058/146] gccrs: stacked-contexts: Add peek() method

[arthur . cohen]

From: Arthur Cohen <arthur.co...@embecosm.com>

gcc/rust/ChangeLog:

        * util/rust-stacked-contexts.h: Add new method to see what context we 
are currently in.
---
 gcc/rust/util/rust-stacked-contexts.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/rust/util/rust-stacked-contexts.h 
b/gcc/rust/util/rust-stacked-contexts.h
index 39a0c08de79..fe0bc8a291b 100644
--- a/gcc/rust/util/rust-stacked-contexts.h
+++ b/gcc/rust/util/rust-stacked-contexts.h
@@ -71,6 +71,13 @@ public:
     return last;
   }
 
+  const T &peek ()
+  {
+    rust_assert (!stack.empty ());
+
+    return stack.back ();
+  }
+
   /**
    * Are we currently inside of a special context?
    */
-- 
2.45.2