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See also dd1de18f9629904b5d97d5791a47244ac63385da.
https://github.com/ziglang/zig/issues/23807
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Its design keeps evolving. See
https://github.com/Nicoshev/rapidhash/releases
It's great to see the design improving, but over time, this will lead to
code rot; versions that aren't widely used but would still have to live
in the standard library forever and be maintained.
Better to be maintained as an external dependency that applications can
opt into. Then, in a few years, if a version proves to be stable and
widely adopted, it could be considered for inclusion in the standard
library.
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Basically everything that has a direct replacement or no uses left.
Notable omissions:
- std.ArrayHashMap: Too much fallout, needs a separate cleanup.
- std.debug.runtime_safety: Too much fallout.
- std.heap.GeneralPurposeAllocator: Lots of references to it remain, not
a simple find and replace as "debug allocator" is not equivalent to
"general purpose allocator".
- std.io.Reader: Is being reworked at the moment.
- std.unicode.utf8Decode(): No replacement, needs a new API first.
- Manifest backwards compat options: Removal would break test data used
by TestFetchBuilder.
- panic handler needs to be a namespace: Many tests still rely on it
being a function, needs a separate cleanup.
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added adapter to AnyWriter and GenericWriter to help bridge the gap
between old and new API
make std.testing.expectFmt work at compile-time
std.fmt no longer has a dependency on std.unicode. Formatted printing
was never properly unicode-aware. Now it no longer pretends to be.
Breakage/deprecations:
* std.fs.File.reader -> std.fs.File.deprecatedReader
* std.fs.File.writer -> std.fs.File.deprecatedWriter
* std.io.GenericReader -> std.io.Reader
* std.io.GenericWriter -> std.io.Writer
* std.io.AnyReader -> std.io.Reader
* std.io.AnyWriter -> std.io.Writer
* std.fmt.format -> std.fmt.deprecatedFormat
* std.fmt.fmtSliceEscapeLower -> std.ascii.hexEscape
* std.fmt.fmtSliceEscapeUpper -> std.ascii.hexEscape
* std.fmt.fmtSliceHexLower -> {x}
* std.fmt.fmtSliceHexUpper -> {X}
* std.fmt.fmtIntSizeDec -> {B}
* std.fmt.fmtIntSizeBin -> {Bi}
* std.fmt.fmtDuration -> {D}
* std.fmt.fmtDurationSigned -> {D}
* {} -> {f} when there is a format method
* format method signature
- anytype -> *std.io.Writer
- inferred error set -> error{WriteFailed}
- options -> (deleted)
* std.fmt.Formatted
- now takes context type explicitly
- no fmt string
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preparing to rearrange std.io namespace into an interface
how to upgrade:
std.io.getStdIn() -> std.fs.File.stdin()
std.io.getStdOut() -> std.fs.File.stdout()
std.io.getStdErr() -> std.fs.File.stderr()
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Closes #23895.
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https://github.com/ziglang/zig/issues/23807
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This was done by regex substitution with `sed`. I then manually went
over the entire diff and fixed any incorrect changes.
This diff also changes a lot of `callconv(.C)` to `callconv(.c)`, since
my regex happened to also trigger here. I opted to leave these changes
in, since they *are* a correct migration, even if they're not the one I
was trying to do!
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The compiler actually doesn't need any functional changes for this: Sema
does reification based on the tag indices of `std.builtin.Type` already!
So, no zig1.wasm update is necessary.
This change is necessary to disallow name clashes between fields and
decls on a type, which is a prerequisite of #9938.
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Also, update `std.math.Log2Int[Ceil]` to more efficient implementations
that don't use up so much damn quota!
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This removes the two original implementations in favour of the single
generic one based on the Algorithm type. Previously we had three, very
similar implementations which was somewhat confusing when knowing what
one should actually be used.
The previous polynomials all have equivalent variants available when
using the Algorithm type.
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This flips things around such that std/hash/crc.zig is generated
by the catalog-based generation tool, and the real code that used
to be in that file is moved out to std/hash/crc/impl.zig. The
generated tests are moved to std/hash/crc/test.zig. By going this
route, we eliminate the need for usingnamespace without changing
anything for callers of these interfaces. The Crc32 tests are
simply added to the fixed part of the generated output and
compactified a bit.
This was the second-to-last usage of usingnamespace left in std.
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closes #5019
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In general, I don't like the idea of std.meta.trait, and so I am
providing some guidance by deleting the entire namespace from the
standard library and compiler codebase.
My main criticism is that it's overcomplicated machinery that bloats
compile times and is ultimately unnecessary given the existence of Zig's
strong type system and reference traces.
Users who want this can create a third party package that provides this
functionality.
closes #18051
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Let's take this breaking change opportunity to fix the style of this
enum.
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Use inline to vastly simplify the exposed API. This allows a
comptime-known endian parameter to be propogated, making extra functions
for a specific endianness completely unnecessary.
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* `@clz`
* `@ctz`
* `@popCount`
* `@byteSwap`
* `@bitReverse`
* various encodings used by std
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This reverts commit 6f0198cadbe29294f2bf3153a27beebd64377566.
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This reverts commit 0c99ba1eab63865592bb084feb271cd4e4b0357e, reversing
changes made to 5f92b070bf284f1493b1b5d433dd3adde2f46727.
This caused a CI failure when it landed in master branch due to a
128-bit `@byteSwap` in std.mem.
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XXH3 is the faster alternative to XXH64 which utilizes SIMD
when hashing large chunks of memory and similar mixing to
WyHash (64x64 -> 128 mul) for smaller inputs.
Co-authored-by: Reixcon226 <87927264+Rexicon226@users.noreply.github.com>
---------
Co-authored-by: kprotty <kbutcher6200@gmail.com>
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Need to confirm how these fare on CI as per previous comments left which
stated OOM (on stage-1).
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Not all hashes are added just yet as these need to be generated manually
from reference implementations as they are not included by default in
smhasher.
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Update calls with input longer then one block must ensure that
last sixteen bytes are available when final is called.
Fixes #16695
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Improvements for xxHash performance, both on small keys as well as large slices.
* std.hash: make benchmarks consistent for xxhash
There is some odd behaviour in the timings for the XXHash benchmarks
introduced in 879f0b9, specifically the changes to the allocation in
benchmarkHash. The problem is somewhere in the difference between
9628243 and 9362d61 (these are commit that were force-pushed over but
can be found in PR #15917).
* std.hash: correctly calculate throughput in benchmark
* std.hash: add hashes per sec to small key output
* std.hash: add exact and small xxhash routines
* std.hash: add --small-only flag to benchmark
* std.hash.xxhash: extract stateless Accumulator type
* std.hash.xxhash: cleanup hash() and improve small key perf
* std.hash.xxhash: port xxhash64 changes to xxhash32
* std.hash: change benchmark --small-only flag to --include-array
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Most of this migration was performed automatically with `zig fmt`. There
were a few exceptions which I had to manually fix:
* `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten
* `@truncate`'s fixup is incorrect for vectors
* Test cases are not formatted, and their error locations change
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Signed-off-by: Eric Joldasov <bratishkaerik@getgoogleoff.me>
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Closes #16070.
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Followup to d42d31f72f38165f70c2850e9cc63da44b3b470c.
Signed-off-by: Eric Joldasov <bratishkaerik@getgoogleoff.me>
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Instead of carrying an optimized version of wyhash in the compiler for
small keys, put it into the std lib where it belongs.
...except it does not match the official test cases. This will need to
be fixed before merging into master. This is an extremely
contributor-friendly task.
Related issue: #15916
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