Guard advance()

Author: rolandreichweinbmw

include/etl/span.h

@@ -745,6 +745,7 @@ namespace etl
     //*************************************************************************
     void advance(size_t elements) ETL_NOEXCEPT
     {
+      elements = etl::min(elements, size());
       pbegin += elements;
     }
 

test/test_span_dynamic_extent.cpp

@@ -1242,6 +1242,10 @@ namespace
         CHECK_EQUAL(data0[0], 0x05);
         data0.advance(1);
         CHECK_EQUAL(data0.size(), 0);
+        data0.advance(1);
+        CHECK_EQUAL(data0.size(), 0);
+        data0.advance(100);
+        CHECK_EQUAL(data0.size(), 0);
       }
     }