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Sed ut perspiciatis unde.
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To my greatest satisfaction, I’ve recently joined a new project. I started to read through the codebase before joining and at that stage, whenever I saw a possibility for a minor improvement, I raised a tiny pull request. One of my pet peeves is rooted in Sean Parent’s 2013 talk at GoingNative, Seasoning C++ where he advocated for no raw loops.
When I saw this loop, I started to think about how to replace it:
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#include
#include
#include
#include
struct FromData {
// ...
std::string title;
int amount;
};
struct Widget {
// ...
std::list<FromData> data;
};
struct ToData {
// ...
std::string title;
int amount;
};
struct Response {
// ...
std::vector<ToData> data;
};
Response foo(Widget widget) {
std::vector<ToData> transformed_data;
for (const auto& element : widget.data) {
transformed_data.push_back(
{.title = element.title, .amount = element.amount * 42});
}
Response response;
// ...
response.data = transformed_data;
return response;
}
int main() {
Widget widget{.data = {
{"a", 1},
{"b", 2},
{"c", 1},
}};
auto r = foo(widget);
for (const auto& element : r.data) {
std::c
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