Anytype is getting renamed to anyval (!)

[Verafahn]

Introducing the keyword infer may be better.

Replace `anytype` with `infer T`(or `@Infer(T)`)

infer T and @Infer(T) are completely equivalent, taking infer T as an example only: Feature The difference from other schemes is that this allows the result position semantics to also take effect in the user function: fn userFunc() infer T { // `T`, like an `anytype` parameter, depends on the location of the function call. } Moreover, treating infer T as a type placeholder can achieve the effect of type deconstruction: fn func(a: []infer T) void { ... } particulars Its basic charact…