Changes to the struct update syntax

[dimitarvp]

I am really torn on that one but ultimately I voted to deprecate it. What tilted the balance was my own counter-counter-argument to this one:

@josevalim

The argument against deprecating it is that, while not useful to the compiler, it can be useful for humans. The main argument is that, if you have a long function, %User{user | ...} is a reminder and a type assertion of the type of the struct, while %{user | ...} would require you to keep more context in your head.

…and, well, don’t have functions that are too long.

As for a more pure PL perspective, I say deprecate it but only if it tangibly simplifies the compiler and saves you work in the future.