lambda transformation
https://andreasfertig.com/blog/2026/06/cpp-insights-new-lambda-transformation/
An updated lambda transformation for C++ Insights was introduced last week. The previous transformation generated a constructor for each lambda, which conflicted with the standard requirement that captures be direct‑initialized and resulted in double moves of copy‑captured objects. Direct‑initialization was therefore omitted, causing inefficient code especially for move‑only types. The new approach adopts public data members and aggregate initialization, eliminating the artificial constructor and aligning the generated code with the standard’s capture semantics. This method also avoids the need to rename captured identifiers, preserving readability. As a result, over 500 lines of transformation code were removed, test output became shorter, and special‑case handling was simplified.