host: Add static_assert to prevent meta_range_t(0,0)

meta_range_t(0,0) actually calls the iterator-based constructor for
meta_range_t, which is almost certainly not the intended constructor
for that call syntax. Therefore, we add a static_assert to prevent
such usage, and fix all failing instances.

1 files changed, 9 insertions, 0 deletions

diff --git a/host/include/uhd/types/ranges.hpp b/host/include/uhd/types/ranges.hpp
index 361b0e9d3..05aa0fa7c 100644
--- a/host/include/uhd/types/ranges.hpp
+++ b/host/include/uhd/types/ranges.hpp
@@ -9,6 +9,7 @@
 
 #include <uhd/config.hpp>
 #include <string>
+#include <type_traits>
 #include <vector>
 
 namespace uhd {
@@ -76,6 +77,14 @@ struct UHD_API meta_range_t : std::vector<range_t>
     meta_range_t(InputIterator first, InputIterator last)
         : std::vector<range_t>(first, last)
     { /* NOP */
+        // This is to avoid people accidentally doing silly things like:
+        // meta_range_t(0, 0)
+        // which probably was supposed to call meta_range_t(double, double, double)
+        // but actually calls this constructor.
+        static_assert(
+            !std::is_integral<typename std::decay<InputIterator>::type>::value,
+            "You can't pass integers to meta_range_t's constructor!"
+        );
     }
 
     /*!