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[toc] / src / visit.h

diff --git a/src/visit.h b/src/visit.h
index 1175a86adc7424e6693c4bac874b0dfc8cf4c287..646ac61d270756dd7d9ab0266fd87e3dcebdcfdb 100644 (file)
--- a/src/visit.h
+++ b/src/visit.h
@@ -4,6 +4,9 @@
 \r
 #include <functional>\r
 \r
+// struct with callback functions for all relevant types\r
+// tree can be walked selectively by providing only\r
+// needed callbacks\r
 struct Visitor {\r
   std::function<void(const Type &, const std::shared_ptr<Context> ctx)> onType = [](auto, auto){};\r
   std::function<void(const Expr &, const std::shared_ptr<Context> ctx)> onExpr = [](auto, auto){};\r
@@ -20,6 +23,7 @@ struct Visitor {
 \r
 #define VISIT(XS) for (auto x : XS) visit(x);\r
 \r
+// simply walk IR by recursively calling functions for all children\r
 struct Visit {\r
 private:\r
   Visitor v;\r