V-1.0.19

Released on Jun 14, 2026

What's New:

- rr2:
	- lists, maps and bytes are now mutable reference types
		- index assignment mutates the container in place
		- operators +, - and * now return shallow copies
		- strings are now immutable, string index assignment removed
		- building up lists, maps and bytes in place (append, index assignment) no longer degrades performance quadratically

	- assignment is now a statement, it can no longer be nested or chained

	- a self referential value now prints as [...], or m[...] for maps
		- copying or comparing a self referential value raises RTError

	- statement sequences are now a distinct block node
		- a block evaluates to the value of its last statement
		- loop and function bodies no longer allocate a throwaway list each iteration
		- while and for loops should now be generally ~5% faster per iteration

	- comments and doc comments are now captured as tokens
	- various parser and interpreter cleanups

- builtins:
	- added copy(value) for fully independent copies
	- append(container, value) and sort(list) now mutate in place and return the container
	- num(value) and list(value) now return err on a failed conversion instead of raising RTError
	- slice(container, start, end) now returns shallow copies

- optionals:
	- json: guard against self referential values

- corelib:
	- libstrings.chh: added ReplaceCharAt(value, idx, char)
	- libterm.chh: MakeRaw(state) now returns a copy and leaves state untouched
	- libraries updated for mutable collections

- misc:
	- added misc/doc2html
	- misc/snake updated for mutable collections

FYI Breaking:

- Lists, maps and bytes are now mutable reference types, your code will likely need to be updated:
	- See chippy doc mutability

- Index assignment now mutates the container in place, append(container, value) and sort(list) mutate in place and return the same object:
	- The old x = append(x, v) and x = sort(x) still work but are redundant

- Assignment is now a statement, not an expression, it can no longer be nested or chained:
	- x = x[i] = v, a = b = c and var y = (a[i] = v) no longer parse, write x[i] = v

- The operators +, - and * and slice(container, start, end) now return shallow copies:
	- Mutating a nested list, map or bytes affects both
		- Use copy(value) for a fully independent copy

- String index assignment (s[i] = v) now raises RTError since strings are immutable:
	- See the new ReplaceCharAt(value, idx, char) in libstrings.chh

- num(value) and list(value) now return err when a value cannot be converted:
	- Check with iserr(value)

72408d139782994f03cba59f721d0722eb5d1d8d818d3b96546c5e59a9bdb0e2 chiplang-1.0.19-linux-aarch64.tar.xz
cae4f568cd6dfa774b9f15ec085c631bced85cc3a14a98c89b6b8ee8e7197ce9 chiplang-1.0.19-linux-x86_64.tar.xz