Convert capture to parameter

recipes/micro-step-helpers/convert-capture-to-parameter/cpp.md

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+{{< Staging >}}
+
+# Recipe
+
+## Given:
+
+A lambda which captures by reference:
+
+```cpp
+std::string s = ...
+
+return [&]() { 
+    std::cout << s;
+}();
+```
+
+Add the variable to the parameter list as `auto&` and pass it as an argument, using the same name in both places.
+
+```cpp
+std::string s = ...
+
+return [&](auto& s) { 
+    std::cout << s;
+}(s);
+```
+
+Consider marking the parameter as `const` as a future refactoring step.