Allow decode helper to take std.data.json JSON stream.

This allows implementation of high-performance custom decoders.
funkwerk-mobility · May 21, 2024 · 6110e75 · 6110e75
1 parent 830b1a6
commit 6110e75
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/src/text/json/Decode.d b/src/text/json/Decode.d
@@ -98,6 +98,11 @@ public template decodeJsonInternal(T, alias transform, Flag!"logErrors" logError
         {
             return decodeJSONValue(jsonStream, mask);
         }
+        else static if (__traits(compiles, transform!T(jsonStream)))
+        {
+            // fast path
+            return transform!T(jsonStream);
+        }
         else static if (__traits(compiles, isCallable!(transform!T)) && isCallable!(transform!T))
         {
             static assert(Parameters!(transform!T).length == 1, "`transform` must take one parameter.");