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Make default state public (#15763)

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* Make default state public

* Address review comments

Co-authored-by: b3liever <b3liever@yandex.com>
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Antonis Geralis 2020-10-29 12:14:22 +02:00 • committed by GitHub
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2 changed files with 7 additions and 1 deletions
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changelog.md
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@ -7,7 +7,7 @@
- `prelude` now works with the JavaScript target. - `prelude` now works with the JavaScript target.
- Added `ioutils` module containing `duplicate` and `duplicateTo` to duplicate `FileHandle` using C function `dup` and `dup2`. - Added `ioutils` module containing `duplicate` and `duplicateTo` to duplicate `FileHandle` using C function `dup` and `dup2`.
- Added `randState` template that exposes the default random number generator. Useful for library authors.
## Language changes ## Language changes

6
lib/pure/random.nim
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@ -119,6 +119,12 @@ else:
a0: 0x69B4C98CB8530805u64, a0: 0x69B4C98CB8530805u64,
a1: 0xFED1DD3004688D67CAu64) # global for backwards compatibility a1: 0xFED1DD3004688D67CAu64) # global for backwards compatibility
since (1, 5):
template randState*(): untyped =
## Makes the default Rand state accessible from other modules.
## Useful for module authors.
state
proc rotl(x, k: Ui): Ui = proc rotl(x, k: Ui): Ui =
result = (x shl k) or (x shr (Ui(64) - k)) result = (x shl k) or (x shr (Ui(64) - k))