Note about raw_pointer() and single-device contexts

ddemidov · Oct 9, 2013 · 257009a · 257009a
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diff --git a/README.md b/README.md
@@ -651,6 +651,9 @@ VEX_FUNCTION(global_interaction, double(size_t, size_t, double*),
 y = global_interaction(x.size(), vex::element_index(), vex::raw_pointer(x));
 ~~~
 
+Note that use of `raw_pointer()` function is limited to single-device contexts
+for obvious reasons.
+
 ## <a name="multivectors"></a>Multivectors
 
 Class template `vex::multivector<T,N>` allows to store several equally sized