đź“° go2cs News Archive

All project announcements, newest first. The README summarizes where the project stands today; every announcement is recorded here, and the detail-heavy ones link to a companion page carrying their full text.
October 1, 2026 — Every implementable standard-library package validates
Every implementable package in Go 1.24.13’s standard library now validates its own test suite in
C#. That is 225 of 225, and 225 of the 230 testable packages, 97.8%, at 69,777
matching verdicts against go test -json, with 373 divergences disclosed by exact failure
signature. On Linux, all 223 applicable rows validate at their own Linux counts, at 69,617 matching
verdicts with 392 disclosed. The other two, internal/syscall/windows and
internal/syscall/windows/registry, are Windows-exclusive and have nothing to compile there.
The last two rows banked today. runtime validates at 10,819 matching verdicts, with 71
disclosed (10,810 and 73 on Linux). This is the Go runtime’s own suite, run against the managed
runtime that replaces Go’s. It covers the scheduler and preemption, channels and select, finalizers
and cleanups, and defer, panic and recover in every ordering, with Go-spelled tracebacks and
crash reports read back from child processes. It also covers maps, stack growth and Windows
callbacks. One test, TestMapIterDeleteReplace, contributes 10,001 of those verdicts through its
subtests, and the roster row says so. Of the 71 disclosures, 33 name something the managed runtime
cannot truthfully describe: Go’s SEH unwinder, its inline tree, GC bitmaps, the tiny allocator’s
layout. Another 24 are deferred. They are allocation counts, plus one live-heap metric that the
managed host has no Go mark phase to produce, and each carries a measured reading and the plan that
retires it. When the Go 1.23.12 record closed on September 7, this suite could be read only as far as
index 104, where a crash killed the test host. Now every verdict is read and accounted for.
runtime/pprof validates at 145 matching verdicts, with 7 disclosed (147 and 7 on Linux). It
covers CPU, heap, goroutine, block and mutex profiles taken in the managed runtime, labels raced
across goroutines, and the profile builder’s proto encoding. Six of its tests wait for another
goroutine’s interior frames in runtime.Stack. Because the CLR cannot walk a foreign thread’s stack,
those six are withdrawn from both sides by name.
The September 24 announcement stood at 218 of 230. Since then, every one of the six implementable
packages it named as not yet validated has validated. net/http validated again on September 25, at
all 1,387 verdicts, once Go 1.24’s internal/synctest was supported. internal/synctest itself banked
at 28 of 28 on September 27, the same day as reflect, now at 396 matching with 22 disclosed.
net/http/pprof banked at 15 of 15 on September 28, and runtime and runtime/pprof complete the six
today. A seventh row joined by arithmetic rather than by ruling. On September 28, runtime/trace left
the exclusion ledger: go2cs’s managed execution tracer writes a trace that Go’s own parser accepts,
both of its verdicts matched, and the implementable set grew from 224 to 225. The same day
runtime/debug left the roster, when its disclosure for TestStack was found to match by substring
and absorb assertion lines it should not have. It returned on September 30, at 8 matching with 1
disclosed, and TestStack is now a plain pass.
The figure needs to be read exactly. A row is all-or-nothing. A package joins only when every
eligible Test verdict matches Go’s or is disclosed, so a package matching every verdict but one
scores zero. A disclosure names a specific Go assertion that the converted suite provably cannot
satisfy, and it is pinned by exact failure signature in a committed manifest, so any other failure is a
hard mismatch. Disclosures are never a tolerance, and nothing is skipped quietly; the few tests
withdrawn are withdrawn from both sides, by name. Validation counts Test functions. Runnable
examples, fuzz seed corpora and benchmarks are the next validation slice. Within that scope, this is
the goal Phase 4 was given. The 100% counts finished packages, judged by Go’s own tests, and the 373
disclosures are where the record says what a managed runtime cannot do, or does not do yet. Every
one of the 225 rows links a proof page that lists Go’s verdict beside go2cs’s, test by test.
Five testable packages sit outside the implementable set. Every one of them is an internal package
that no Go program outside the standard library can import, and each is listed with its class,
mechanism and evidence. runtime/internal/wasitest is a WASI test package that runs no test on
windows/amd64, because its only selecting test skips unless the target is wasip1/wasm (E1).
internal/unsafeheader builds live slices and strings by writing raw header fields, a memory model
a managed runtime deliberately does not have, so a pass would be fabrication rather than implementation
(E3). The other three run cleanly but validate nothing about the port (E4). net/internal/cgotest’s
only test has an empty body, internal/copyright scans the GOROOT both sides share for copyright
notices, and crypto/internal/fips140deps shells out to go list to check the Go tree’s import
policy. An exclusion rejoins the denominator the day its evidence changes, as runtime/trace’s did.
Go’s own tests first passed in C# on July 17, with
unicode/utf8’s fourteen verdicts. Seventy-six days later, the last implementable package validated.
The converted standard library ships as NuGet 1.24.13.3, targeting .NET 10. It is the first
release published with every implementable package validated. Every proof page is frozen at
validation/1.24.13.3 for the badges the packed READMEs link, and the exact shipped tree is
browsable at the nuget-1.24.13.3 tag.
With the standard library validated, the work turns to real Go code brought to .NET. Whole modules will be converted together and validated against their own test suites, so that a module is judged by its own tests the way the standard library is. Alongside that comes nugetgo.net, a registry for converted Go modules.
Roster commit 133ca704e · tag nuget-1.24.13.3
September 24, 2026 — The converted standard library moves to Go 1.24.13, and 218 packages validate against it
go2cs now converts Go 1.24.13’s standard library, and the validated roster crossed the hop
re-derived, not carried: 218 of the 230 testable standard-library packages validate their own
Go 1.24.13 test suites in C# — 56,974 matching verdicts against go test -json, with 283
divergences disclosed by exact failure signature — and, measured against the 224 packages a faithful
managed conversion can honestly validate at all, 97.3%. On Linux, 187 of the 216 applicable rows
validate at their own Linux counts, at 53,048 matching verdicts. Every validated row is proved by a
run at Go 1.24.13.
The count rises by fourteen from the Go 1.23.12 record’s 204 while the testable set grows by fifteen,
so both percentages dip — 97.6% to 97.3% of the implementable set, 94.9% to 94.8% of the testable
one. One package validated at Go 1.23.12 is not validated at Go 1.24.13: net/http. It matches
1,370 of its 1,387 verdicts, and all 17 divergences trace to tests run under Go 1.24’s new
internal/synctest, the runtime support behind the experimental testing/synctest, which go2cs does
not yet support; it still ships as go.net.http. Go 1.24 moved ten validated packages to new import
paths, and their tests validate under the packages that now hold them. Counting those, twenty-five
rows join, among them unique and Go 1.24’s new crypto/hkdf, crypto/mlkem, crypto/pbkdf2,
crypto/sha3 and weak. Six implementable packages are not yet validated: reflect, runtime,
runtime/pprof, net/http/pprof, net/http and Go 1.24’s new internal/synctest.
On Linux the count falls from 198 to 187: the relocated packages’ tests are not yet run on Linux at
their new paths, and go/internal/srcimporter has no Linux result, because Go’s own test of it fails
on the Linux reference machine; it stays validated on Windows. The verdict total doubles because Go’s
suites grew — crypto/cipher alone matches 27,272 verdicts, against 13 at Go 1.23.12 — so verdict
totals do not compare across Go releases.
Converted programs get Go 1.24’s APIs — os.Root, weak.Pointer, crypto/mlkem and
strings.Lines, among others — and //go:embed support. go2cs itself now builds with Go 1.24.13, and
a -recurse=nuget conversion needs its module to resolve to Go 1.24; to stay on Go 1.23, build the
converter at the nuget-1.23.12.3 tag with Go 1.23.12 and use the 1.23.12.3 packages. Go 1.24’s
FIPS 140-3 module converts and its tests validate, but go2cs makes no FIPS 140-3 claim: the module’s
integrity self-check hashes a binary layout that a .NET assembly does not have, so under
GODEBUG=fips140=on the converted check reports success without verifying anything.
Fifty-one package IDs are new, six of them for packages a Go program can import: go.crypto.fips140,
go.crypto.hkdf, go.crypto.mlkem, go.crypto.pbkdf2, go.crypto.sha3 and go.weak. Fourteen end
at 1.23.12.3, their last release, because Go 1.24 moved or deleted their packages; none is importable
outside the standard library, and each stays restorable at 1.23.12.3 and is never unlisted.
The converted standard library publishes as NuGet 1.24.13.1 — 344 packages, author-signed, still
targeting .NET 10 — with every proof page frozen at validation/1.24.13.1 for the badges the packed
READMEs link, and the exact shipped tree browsable at the nuget-1.24.13.1 tag. The Go 1.23.12
record stays frozen as it shipped, at validation/1.23.12.3.
Full story: The converted standard library moves to Go 1.24.13
· tag nuget-1.24.13.1
September 7, 2026 — The Go 1.23.12 record closes at its anchor; the corpus hops to Go 1.24
The Go 1.23.12 validation record is closed. It stands at 204 of the 215 testable
standard-library packages — 28,459 matching verdicts against go test -json, with 167
divergences disclosed by exact failure signature — and, measured against the 209 packages a faithful
managed conversion can honestly validate at all, 97.6%. On Linux, 198 of the 202 applicable rows
validate at their own Linux counts, at 23,199 matching verdicts. Those figures are an anchor
rather than a running total: the corpus now moves to Go 1.24.13 instead of driving this release
to 100% first.
Five packages remain unbanked here — reflect, runtime, unique, runtime/pprof and
net/http/pprof — and none of them is written off. A version hop re-derives every roster row from
the new release’s own test sources — numerator, denominator and disclosure set alike — so all five
re-validate against Go 1.24 on exactly the footing of the 204 that banked. What holds each back
differs: reflect is measured and under active converter and runtime work; runtime is measured
only as far as a host-killing crash — TestCrashWhileTracing, at index 104 of its 883 verdicts —
which leaves everything after it unread; unique is measured at 19 of its 20 verdicts under the
configuration of record and waits on a ruled runtime-model arc; and runtime/pprof and
net/http/pprof are each measured on two hosts and held by a capability or classification ruling.
The reordering is deliberate, and it is worth saying why, because the percentage means something narrower than it looks. The metric is package-based, not content-based: a row is all-or-nothing, so a package matching most of its verdicts still scores zero, exactly as one matching none of them does — which is what keeps the roster honest, and what makes the headline a count of finished packages rather than of passing tests. What is left is therefore a long tail of runtime-model work — Go’s own heap layout, its type descriptors, its profiling internals — that does not stand between a user and a converted program. The project is measured against a trustable platform that migrates packages and applications from Go to C#, and a more recent Go standard library unlocks more of that than the tail does. This is not a compromise but a reordering: the hop that unlocks user capabilities happens first, and the remaining guardrails are handled after it.
The 1.23.12 corpus ships one final NuGet release as that anchor before the pin moves — the release that freezes its roster, its proof pages and every package README at the record above. It has to come first: the pin bump resets the build counter, so once the corpus names Go 1.24 there is no longer any version left in which the 1.23.12 record could ship.
August 29, 2026 — Over 90% of the standard library’s test suites pass in C#
189 of the 215 testable standard-library packages validate their own Go 1.23.12 test suites in
C# — 26,043 matching verdicts against a clean go test -json baseline, with 148 divergences
disclosed by exact failure signature and nothing else waived. Seven of the 215 cannot be validated at
all — no eligible tests on this platform, a broken upstream oracle, or a suite whose whole subject is
the raw memory layout a managed runtime deliberately does not have — so against the implementable set
of 208 the roster reads 90.9%. On Linux, 178 of the 188 applicable rows validate at their own Linux
counts, at 21,807 matching verdicts.
The push past 90% landed net itself — 472 verdicts, the roster’s largest networking row — banked
the day two phantom DNS servers and a router forwarder stopped impersonating an oracle. A host whose
own go test net fails is disqualified as a reference, because the two sides of a differential would
then be running different oracles; qualifying one was the work. reflect compiled and executed for the
first time alongside it, and net/netip, net/http/cookiejar and debug/pe joined the roster in a
single day.
The converted standard library publishes as NuGet 1.23.12.2 — 307 packages, author-signed — with
this release’s 189 proof pages frozen at validation/1.23.12.2 for the badges the packed READMEs link,
and the exact shipped tree browsable at the nuget-1.23.12.2 tag.
Added to the archive on September 7, 2026; the announcement itself ran on the project’s front page
from August 29. Release freeze and announcement: 773afa2c2 · published: d2da277f5
August 25, 2026 — Both runtime pins move: .NET 10, Go 1.23.12 — and the whole roster re-proves itself
go2cs now targets .NET 10 and converts Go 1.23.12, and the validated roster crossed the hop the
only honest way: re-derived, not carried. Every one of the 162 banked packages re-validated from
the new release’s own _test.go sources — 18,598 matching verdicts against a clean
go test -json baseline at the new pins, with the 85 disclosures re-signed against the new
sources — count and per-row set unchanged. The
29 new verdicts over the 1.23.1 record come exactly from the four suites whose verdict counts
moved with the release (time, os/exec, syscall, database/sql), reconciled to the digit
across the machines that ran the re-validation shards. A version hop invalidates every row’s numerator,
denominator and disclosure set by design; there is no carry-forward path, so agreement at the new
pins is measured, never assumed.
The .NET half moved 955 project files to net10.0 with zero corpus-emission drift across all three
OS flavors — and immediately earned its keep: C# 14’s new implicit array-to-span conversion
changed which overload form a variadic call binds, exposing that the corpus’s variadic-slice
binding had been correct by accident under C# 13. The converter now emits the binding that is
correct on purpose.
The converted standard library publishes as NuGet 1.23.12.1 — each package README freezing its
validation badges against this release’s own proof snapshot, with the exact shipped tree browsable
at the nuget-1.23.12.1 tag.
August 22, 2026 — Over 75% of the standard library’s test suites pass in C#
162 of the 215 testable standard-library packages (75.3%) validate their own Go 1.23.1 test
suites in C# — 18,569 matching verdicts against a clean go test -json baseline, with
85 signature-pinned disclosed divergences. Each suite is converted from Go’s own
_test.go sources, built against the converted standard library, run under the Go-semantics test
host, and compared verdict for verdict; a package joins the roster only when every eligible test
agrees.
The milestone is tagged because something genuinely hard landed with it. A converted stack frame
now reports a Go file and line. The position is derived from conversion-time facts rather than
composed — file and line ship together, because either alone names a position that exists in
neither tree — and the identity is build-shape-faithful: the published standard library reports
the same trimpath form Go bakes into a published binary, while a converted user module reports the
source path Go would have baked for that build. runtime/debug, log, log/slog and flag all
rest on it.
Three more capabilities landed alongside. Channel direction and map key/element dimensions ride
the type descriptor, so reflect distinguishes <-chan int from chan int and a decode target
can measure an array it has never populated — which retired an entire disclosure class on its own
recorded remedy and banked both template packages. A native pointer slot holds the pointer’s
value, not a managed reference, closing a round-trip that had also hidden a GC-invisible
dangling-reference hazard. And an always-on GC recorder supplies real pause and release facts
to runtime/debug’s statistics surface at zero cost per read.
What the campaign declined is part of the record. A disclosure names something the managed runtime provably cannot satisfy — never something merely unimplemented — so packages that reach 105 of 106 or 210 of 267 stay off the roster with their remaining root named and priced. Four disclosure classes carry the campaign’s divergences today; a fifth retired itself the day its remedy landed, exactly as it was written to.
This is Go 1.23.1’s terminal validation marker. Every roster row re-derives from a release’s own test sources at a version hop, so the campaign continues on Go 1.23.12 — the release users would actually choose — with the 1.23 story living on its own branch.
August 8, 2026 — Go programs run on Linux
Converted Go programs now run on Linux, byte-identical to go run: fmt.Println("hello, 世界"),
a program crossing os.Args, os.Getenv and time.Now(), and the README’s own
real-world walkthrough — fatih/color printing true ANSI
colour under a real PTY, with the isatty branch agreeing with Go in both directions (plain when piped,
coloured on a terminal). The whole campaign landed in one continuous arc: the repository checks out
deterministically on any filesystem, the converter and every harness instrument run natively on Linux,
the standard library compiles for windows, linux and darwin from one tree (per-GOOS source folders
selected by $(GoTargetOS), windows the default, with 141 of 141 shared-source packages measured
IL-identical across flavors), and each Go package ships as one NuGet package carrying RID-specific
assemblies only where source genuinely varies.
At the bottom of it all sits one measured keystone: Linux’s entire syscall surface crosses the
kernel through a single libc syscall(2) binding whose three claims were probed rather than argued —
the variadic ABI with a real six-argument mmap, the second return register shown to be exact (the
kernel preserves RDX), and errno round-tripped through a deliberate fault. The road there surfaced
exactly two converter defect families and a handful of linkname wiring gaps — including the lesson that
a forward alone can pass a run and be wrong (os.Args silently empty), which is why every wiring row
now pairs with its populated truth. The FFI surface simultaneously converged on source-generated
[LibraryImport] bindings, where non-blittable signatures fail at compile time — three latent
marshalling hazards surfaced during the migration, each converted explicitly.
Stated plainly: the published 1.23.1.4 packages still carry Windows-only assemblies — the Linux
experience ships with the next release; a Linux consumer of the few platform-divergent packages also
needs the compile-surface answer scheduled next; and darwin binaries are compile-proven and
IL-identity-backed but have never been executed here. The Windows lane did not move a byte through any
of it: every merge held CNR byte-identical, the behavioral suite green, and the 110-package validated
sweep at 13,628 verdicts with zero failures.
August 8, 2026 — Over half the standard library validates; defers reach zero allocation
Three days took the validated roster from 73 packages to 110 of 215 (51.2%) — 13,628 matching
verdicts against go test, 50 disclosed divergences, not one added in the climb. The largest single
advance was also the quietest: a re-scout of never-measured packages found 34 that validated with no
changes at all — the corpus had grown past them as shared machinery landed. The loudest was
architectural: defer now compiles to an inline try/catch/finally over a ref struct frame —
no closure object, no delegate per defer, zero allocation for non-capturing defers — replacing the
execution-context lambda while improving behavioral fidelity (a capture-semantics divergence class
died by construction). Three runtime capabilities were hand-implemented on managed primitives following
the established pattern: Go’s concurrent hash-trie map, weak pointers, and caller-frame walks. And three
user-reported -recurse failures — a quoted go.mod directive, a C# keyword inside an import path, and
a type renderer chasing its own tail through <-chan — were each root-caused, fixed, and answered on
the issue the same day, ending with gopkg.in/yaml.v3 converting, compiling, and running byte-identical
to go run.
July 26, 2026 — More than a quarter of the standard library’s test suites pass in C#
57 of the 215 testable standard-library packages validated their own Go test suites in C# — 26.5%
of the Phase-4 target, at 1,459 matching test results with 47 honestly disclosed as
divergent rather than quietly dropped. A package counted only when every Test function’s verdict
matched a clean go test -json -count=1 baseline. The set moved well past leaf packages: sync’s own
concurrency suite, the RE2 engine in regexp, strconv’s float formatting, the crypto/sha* family,
and the reflection-driven errors, encoding/binary and go/token — the last round-tripping a
FileSet through the real converted encoding/gob. The same push made goroutine exit, string-literal
allocation and structural interface assertion behave the way Go specifies, and corrected two published
performance figures that had been measuring the wrong artifact. Per-package counts are in
Validated Test Packages; the measured numbers in Performance.
Full story:
More than a quarter of the standard library’s test suites pass in C# · commit 44fcc4f04 · reproduce any row from a
clone via Try it yourself
July 18, 2026 — unicode/utf16 validates; disclosed-divergence generalizes
Phase-4 package #5. unicode/utf16
validated its own Go test suite in C# — 8 tests agreeing outright against go test -json, plus one
honestly disclosed. The structural twin of the very first validated package (unicode/utf8), it
round-trips UTF-16 encode/decode with results checked by reflect.DeepEqual, exercised through the
converted reflection bridge. Its significance was the ninth test: TestAllocationsDecode asserts a
zero-allocation Decode, which Go reaches only through compiler escape analysis and a managed runtime
provably cannot match. unicode/utf16 was the first package to reuse the disclosed-divergence manifest
as a general tool rather than a two-package special case, pinning that one alloc-profile row by
exact failure signature while a separate test proved the decoded output correct — a mechanism that
generalizes cleanly is a mechanism that was designed right.
Full story:
unicode/utf16 validates; disclosed-divergence generalizes · Phase-4 package #5 · 8 + 1 disclosed (alloc-profile)
· reproduce from a clone via Try it yourself
July 18, 2026 — bytes and strings tests pass, with disclosed-divergence
Two more standard-library packages validated their own Go test suites in C# — and they arrived with
a new piece of Phase-4 machinery. bytes
validated 81 tests and strings
68 against go test -json, bringing the Phase-4-validated count to four after unicode/utf8 and
sort. Both contain tests that assert an exact allocation count via testing.AllocsPerRun —
unsatisfiable by design in a managed runtime, where the divergence is the allocation model, not the
measurement. Rather than silently skip them, go2cs began disclosing them at test level: a hand-owned,
repo-committed go2cs_test_disclosures.json pins {test, divergence class, expected failure
signature}, and the differential oracle reclassifies a result only when both the test name and the
pinned signature match — an integrity guard, not a blanket exemption. Packages without a manifest
compare strictly.
Full story:
bytes and strings tests pass, with disclosed-divergence · Phase-4 packages #3 and
#4 · sort 63/63, bytes 81, strings 68 · reproduce from a clone via
Try it yourself
July 17, 2026 — Go’s own tests now pass in C#
A standard-library package’s own Go test suite — converted to C# — ran and agreed with go test,
verdict for verdict. unicode/utf8’s
real test suite (Go 1.23.1) validated 14/14 through the new converted-test pipeline: the _test.go
files are transpiled to C#, built against the converted standard library, executed under a Go-semantics
test host, and differentially compared against a clean go test -json baseline by full test name — with
every benchmark and example declaration honestly disclosed rather than silently skipped. One week after
“the whole standard library compiles,” the answer to “but does it run?” had its first
machine-checked proof, reproducible from a clone.
This opened the Phase 4 operational era — real Go tests, not compilation, are the currency of
correctness — with sort, strings and bytes next in line.
Tag: utf8-tests-green-2026-07-17
· commit 337a928df
July 14, 2026 — The converted Go standard library is on NuGet
The converted Go standard library, the golib runtime, and the go2cs-gen analyzer are published to
nuget.org as go.<pkg> /
go.lib / go.gen,
versioned 1.23.1.<build> from src/version.props. The converter’s new -recurse=nuget mode emits
matching <PackageReference> entries — defaulting $(GoStdLibVersion) to a floating release — so a
converted end-user app or library restores the whole go2cs stack from NuGet with no local go2cs source
checkout; the app’s own and third-party converted packages stay project references. See
Converting a real-world module for the end-to-end walkthrough.
Tag: nuget-stdlib-2026-07-14
· commits 2363af0e6, 2e15eec9d, dd821a556
July 10, 2026 — The entire Go standard library compiles in .NET
All 302 packages of the auto-converted Go standard library (Go 1.23.1) compile
cleanly as .NET assemblies — zero errors, zero exclusions. Every package you’d expect to be hard is
in that number: runtime, reflect, net/http, go/types, crypto/tls, database/sql,
encoding/json. The transpiled output is not a demo subset — it is the standard library, end to end,
emitted by the converter, transpiled Go to C#, then compiled by Roslyn. NOTE: don’t get too excited,
this is fully compilable not fully runnable — that’s the next phase (underway; see the July 17 item
above)! However, simple apps will run, try
converting a real-world module. Read more about this
milestone’s details and
current status in the README.
Tag: stdlib-green-2026-07-10
· commit 51ba5d9cf
June 27, 2026 — The math package compiles clean
The full-conversion math package compiles clean — a core, widely-imported standard-library
package, and with it a major step in the Phase 3 drive to compile the whole auto-converted standard
library. The session that landed it greened nine full-conversion packages (unicode,
internal/trace/event, unicode/utf16, internal/platform, image/color, runtime/internal/sys,
runtime/internal/math, math/bits, and math) via 19 behaviorally-tested converter and generator
fixes. The dominant theme was comprehensive untyped-constant typing, plus shadowing fixes,
namespace-collision qualification, composite self-qualification, and relational-pattern guards.
Tag: math-green-2026-06-27
· commit 914d4bd72
May 5, 2025 — First full standard-library auto-conversion
The rewritten Go-based converter completed its first full standard-library auto-conversion: the whole Go standard library (~301 projects) converted end to end. “Converted” here meant the transpiler did not crash and every Go source file received a corresponding C# file — not yet that the emitted C# compiles. Driving this full conversion to a clean compile became the Phase 3 campaign, finished on July 10, 2026 (above).
Tag: full-conversion-2025-05
(cc14584c7, May 11) · commit 6ca1c45b7
January 12, 2025 — The converter is rewritten in Go (“go2cs” version 2)
Major project restructuring — the “go2cs iteration 2” generation begins: the converter is
re-implemented in Go on the official go/ast + go/types toolchain, replacing the original C#
converter built on an ANTLR4 Go grammar; T4 templates are replaced by raw string literals; and Roslyn
source generators take over the auto-generated ancillary code that supplies Go semantics at compile
time. The ANTLR4/C# converter is retired.
Commit: 87465f5f5
November 19, 2022 — .NET 7.0, C# 11, and UTF-8 string literals
From the ANTLR4-era converter’s News:
- Project has been updated to use .NET 7.0 / C# 11.
- String literals are encoded using UTF-8 (C#
u8string suffix) which uses theReadOnlySpan<byte>ref struct. This should make Go strings faster since strings do not have to be converted to UTF-8 from UTF-16. Also added an experimentalsstring, a ref struct implementation of a Go string. - Code conversions now better match original Go code styling.
Commit: d90f267d4
March 13, 2022 — v0.1.2 release
go2cs v0.1.2 is released — a tagged release of the mature ANTLR4-era converter. Converted code
now targets .NET 6.0 / C# 10, using file-scoped namespaces and reduced indentation to better match
the original Go code’s styling, with new command-line options for pre-C#-10-compatible output and ANSI
brace style, options to skip GOOS/GOARCH- and cgo-targeted files, and the ANTLR4 grammar synchronized
to the official source.
Tag: v0.1.2 (289b939db)
January 5, 2021 — Go as a scripting language for Unity and Godot
Example usages of go2cs allow Go to serve as the scripting language for the Unity and Godot game-engine platforms — see the GoUnity and GodotGo projects. The project has also been updated to .NET 5.0 and supports publishing as a self-contained executable.
Commits: efb497b3a, e5c2d7cbc
August 29, 2020 — First full conversion of the Go standard library (ANTLR4 era)
The initial conversion of the full Go source library completed without failing — the converter’s first end-to-end pass over the entire standard library, committed to src/go-src-converted.
The warnings in that conversion’s build log laid out the road map of the parsing and conversion work
remaining. Converted code at the time targeted .NET Core 3.1 / C# 8.0, and simple conversions depended
on src/gocore — the small, manually-converted subset of the Go library that survives today as the
curated baseline in src/core.
Commit: 8e2d6e8e6