arnehormann
Joined 13 years ago
Joined 13 years ago
If you use backticks, the tag must not contain another backtick. On anything but a struct tag, you could get by by concatenating literals, but that's not allowed for struct tags: https://golang.org/ref/spec#Tag You could use double quotes instead of backticks, but that leads to a dark corner of escaping hell and an utterly unreadable mess.
Thankfully, the language strongly nudges you to very, very simplistic and light uses of struct tags.
mkdir -p ~/.config/git
Imagine a close() interface in Java. There isn't one - but having a try {...} finally { x.close(); } can be very useful sometimes. But having interface graphs made of granular interfaces makes everything slow and causes a lot of complexity when you try to think about your type hierarchy. That's why interfaces always just grow and you can't use them any longer because other classes only implement part of the api. Something usable for all of awt, swing, file handling, random foreign libraries? Unthinkable. Also, adding something in a later release (like CharSequence in 1.4) can have a wide ranging impact and requires you to change a lot of code.
In Go, you just add an interface from the union set of multiple structs api - and you can use it. No matter who wrote those structs. The value is enormous. Think of it as something like dependency injection at compile time.
I landed there after watching one on paper sizes on the same channel. Also pretty much worth it!