added thaw to complement freeze

[tionis]

Relevant issue: #1092
Not sure if all cases are handled here.

[sogaiu]

(Sorry my original comment was confused / wrong -- hopefully this latest version is better.)

May be prototype stuff is not being handled:

(def ds
  (struct/with-proto {:b 2} :a 1))

(get ds :a)
# =>
1

(get ds :b)
# =>
2

(get (thaw ds) :a)
# =>
1

(get (thaw ds) :b)
# =>
nil

[tionis]

Interesting, I'll look into it. Thanks!

[tionis]

OK, prototypes don't appear in normal lookups, I guess I could check recursively for prototypes in structs and maps and inline them with the uppermost struct. Not sure about the performance implications of that approach, but I'll implement it quickly.

[tionis]

Oh nevermind, I can just use proto-flatten

[tionis]

Ok, should be fixed now

[sogaiu]

Worked here too 👍

Will you be adding any tests?

[zevv]

Minor comment: maybe handle the different types in the same order as (freeze) does, which makes it harder to compare the implementations and maybe later add different types.

[tionis]

I added simple tests for thaw and freeze and reordered the types in the implementation

[sogaiu]

On a side note, going over the tests I started to wonder whether it would be worth having functions like mutable? / immutable? and may be deep-* versions.

I didn't see any functions like that already, but I don't know if they'd be that useful.