[llvm-branch-commits] [mlir] [mlir][IR] Add listener notifications for pattern begin/end (PR #84131)

[Mehdi Amini via llvm-branch-commits]

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@@ -68,9 +68,9 @@ class PatternApplicator {
   ///            invalidate the match and try another pattern.
   LogicalResult
   matchAndRewrite(Operation *op, PatternRewriter &rewriter,
-                  function_ref<bool(const Pattern &)> canApply = {},
-                  function_ref<void(const Pattern &)> onFailure = {},
-                  function_ref<LogicalResult(const Pattern &)> onSuccess = {});
+                  std::function<bool(const Pattern &)> canApply = {},
+                  std::function<void(const Pattern &)> onFailure = {},
+                  std::function<LogicalResult(const Pattern &)> onSuccess = {});
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joker-eph wrote:

That can explain why you changed it at the call-site, but I'm puzzled about this function: it does not capture the callback as far as I can tell.

https://github.com/llvm/llvm-project/pull/84131