feat: support go1.22

* feat: support go1.22

* Temporary fix for consistency tests due to language change in for loops

* review: clean old files

---------

Co-authored-by: Fernandez Ludovic <ldez@users.noreply.github.com>

.github/workflows/go-cross.yml

@@ -17,7 +17,7 @@ jobs:
 
     strategy:
       matrix:
-        go-version: [ '1.20', '1.21' ]
+        go-version: [ '1.21', '1.22' ]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
         include:

.github/workflows/main.yml

@@ -7,7 +7,7 @@ on:
   pull_request:
 
 env:
-  GO_VERSION: '1.21'
+  GO_VERSION: '1.22'
   GOLANGCI_LINT_VERSION: v1.55.2
 
 jobs:
@@ -45,7 +45,7 @@ jobs:
     needs: linting
     strategy:
       matrix:
-        go-version: [ '1.20', '1.21' ]
+        go-version: [ '1.21', '1.22' ]
     steps:
       - name: Set up Go ${{ matrix.go-version }}
         uses: actions/setup-go@v2
@@ -76,7 +76,7 @@ jobs:
         working-directory: ${{ github.workspace }}/go/src/github.com/traefik/yaegi
     strategy:
       matrix:
-        go-version: [ '1.20', '1.21' ]
+        go-version: [ '1.21', '1.22' ]
 
     steps:
       - name: Set up Go ${{ matrix.go-version }}

Makefile

@@ -27,4 +27,15 @@ tests:
 install.sh: .goreleaser.yml
 	godownloader --repo=traefik/yaegi -o install.sh .goreleaser.yml
 
-.PHONY: check gen_all_syscall gen_tests generate_downloader internal/cmd/extract/extract install
+generic_list = cmp/cmp.go slices/slices.go slices/sort.go slices/zsortanyfunc.go maps/maps.go \
+			   sync/oncefunc.go sync/atomic/type.go
+
+# get_generic_src imports stdlib files containing generic symbols definitions
+get_generic_src:
+	eval "`go env`"; echo $$GOROOT; gov=$${GOVERSION#*.}; gov=$${gov%.*}; \
+	for f in ${generic_list}; do \
+		nf=stdlib/generic/go1_$${gov}_`echo $$f | tr / _`.txt; echo "nf: $$nf"; \
+		cat "$$GOROOT/src/$$f" > "$$nf"; \
+	done
+
+.PHONY: check gen_all_syscall internal/cmd/extract/extract get_generic_src install

README.md

@@ -17,7 +17,7 @@ It powers executable Go scripts and plugins, in embedded interpreters or interac
 * Works everywhere Go works
 * All Go & runtime resources accessible from script (with control)
 * Security: `unsafe` and `syscall` packages neither used nor exported by default
-* Support the latest 2 major releases of Go (Go 1.20 and Go 1.21)
+* Support the latest 2 major releases of Go (Go 1.21 and Go 1.22)
 
 ## Install
 

_test/addr0.go

@@ -15,11 +15,10 @@ func main() {
 	r := extendedRequest{}
 	req := &r.Request
 
-
-	fmt.Println(r)
-	fmt.Println(req)
+	fmt.Printf("%T\n", r.Request)
+	fmt.Printf("%T\n", req)
 }
 
 // Output:
-// {{ <nil>  0 0 map[] <nil> <nil> 0 [] false  map[] map[] <nil> map[]   <nil> <nil> <nil> <nil>} }
-// &{ <nil>  0 0 map[] <nil> <nil> 0 [] false  map[] map[] <nil> map[]   <nil> <nil> <nil> <nil>}
+// http.Request
+// *http.Request

extract/extract.go

@@ -478,7 +478,7 @@ func GetMinor(part string) string {
 	return minor
 }
 
-const defaultMinorVersion = 21
+const defaultMinorVersion = 22
 
 func genBuildTags() (string, error) {
 	version := runtime.Version()

go.mod

@@ -1,3 +1,3 @@
 module github.com/traefik/yaegi
 
-go 1.20
+go 1.21

interp/interp_consistent_test.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 
@@ -15,6 +16,13 @@ import (
 	"github.com/traefik/yaegi/stdlib/unsafe"
 )
 
+// The following tests depend on an incompatible language change in go1.22, where `for` variables are now
+// defined in body (thus reallocated at each loop). We skip them until both supported versions behave the same.
+// We will remove this in Go1.23.
+var testsToSkipGo122 = map[string]bool{"closure9.go": true, "closure10.go": true, "closure11.go": true, "closure12.go": true}
+
+var go122 = strings.HasPrefix(runtime.Version(), "go1.22")
+
 func TestInterpConsistencyBuild(t *testing.T) {
 	if testing.Short() {
 		t.Skip("short mode")
@@ -125,6 +133,9 @@ func TestInterpConsistencyBuild(t *testing.T) {
 		if go121 && testsToSkipGo121[file.Name()] {
 			continue
 		}
+		if go122 && testsToSkipGo122[file.Name()] {
+			continue
+		}
 
 		file := file
 		t.Run(file.Name(), func(t *testing.T) {

stdlib/generic/go1_21_generic.go

@@ -1,5 +1,5 @@
-//go:build go1.21
-// +build go1.21
+//go:build go1.21 && !go1.22
+// +build go1.21,!go1.22
 
 package generic
 

stdlib/generic/go1_22_cmp_cmp.go.txt

@@ -0,0 +1,71 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package cmp provides types and functions related to comparing
+// ordered values.
+package cmp
+
+// Ordered is a constraint that permits any ordered type: any type
+// that supports the operators < <= >= >.
+// If future releases of Go add new ordered types,
+// this constraint will be modified to include them.
+//
+// Note that floating-point types may contain NaN ("not-a-number") values.
+// An operator such as == or < will always report false when
+// comparing a NaN value with any other value, NaN or not.
+// See the [Compare] function for a consistent way to compare NaN values.
+type Ordered interface {
+	~int | ~int8 | ~int16 | ~int32 | ~int64 |
+		~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64 | ~uintptr |
+		~float32 | ~float64 |
+		~string
+}
+
+// Less reports whether x is less than y.
+// For floating-point types, a NaN is considered less than any non-NaN,
+// and -0.0 is not less than (is equal to) 0.0.
+func Less[T Ordered](x, y T) bool {
+	return (isNaN(x) && !isNaN(y)) || x < y
+}
+
+// Compare returns
+//
+//	-1 if x is less than y,
+//	 0 if x equals y,
+//	+1 if x is greater than y.
+//
+// For floating-point types, a NaN is considered less than any non-NaN,
+// a NaN is considered equal to a NaN, and -0.0 is equal to 0.0.
+func Compare[T Ordered](x, y T) int {
+	xNaN := isNaN(x)
+	yNaN := isNaN(y)
+	if xNaN && yNaN {
+		return 0
+	}
+	if xNaN || x < y {
+		return -1
+	}
+	if yNaN || x > y {
+		return +1
+	}
+	return 0
+}
+
+// isNaN reports whether x is a NaN without requiring the math package.
+// This will always return false if T is not floating-point.
+func isNaN[T Ordered](x T) bool {
+	return x != x
+}
+
+// Or returns the first of its arguments that is not equal to the zero value.
+// If no argument is non-zero, it returns the zero value.
+func Or[T comparable](vals ...T) T {
+	var zero T
+	for _, val := range vals {
+		if val != zero {
+			return val
+		}
+	}
+	return zero
+}

stdlib/generic/go1_22_generic.go

@@ -0,0 +1,41 @@
+//go:build go1.22
+// +build go1.22
+
+package generic
+
+import _ "embed"
+
+//go:embed go1_22_cmp_cmp.go.txt
+var cmpSource string
+
+//go:embed go1_22_maps_maps.go.txt
+var mapsSource string
+
+//go:embed go1_22_slices_slices.go.txt
+var slicesSource string
+
+/*
+//go:embed go1_22_slices_sort.go.txt
+var slicesSource1 string
+
+//go:embed go1_22_slices_zsortanyfunc.go.txt
+var slicesSource2 string
+
+//go:embed go1_22_sync_oncefunc.go.txt
+var syncSource string
+
+//go:embed go1_22_sync_atomic_type.go.txt
+var syncAtomicSource string
+*/
+
+// Sources contains the list of generic packages source strings.
+var Sources = [...]string{
+	cmpSource,
+	mapsSource,
+	slicesSource,
+	// FIXME(marc): support the following.
+	// slicesSource1,
+	// slicesSource2,
+	// syncAtomicSource,
+	// syncSource,
+}

stdlib/generic/go1_22_maps_maps.go.txt

@@ -0,0 +1,68 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package maps defines various functions useful with maps of any type.
+package maps
+
+// Equal reports whether two maps contain the same key/value pairs.
+// Values are compared using ==.
+func Equal[M1, M2 ~map[K]V, K, V comparable](m1 M1, m2 M2) bool {
+	if len(m1) != len(m2) {
+		return false
+	}
+	for k, v1 := range m1 {
+		if v2, ok := m2[k]; !ok || v1 != v2 {
+			return false
+		}
+	}
+	return true
+}
+
+// EqualFunc is like Equal, but compares values using eq.
+// Keys are still compared with ==.
+func EqualFunc[M1 ~map[K]V1, M2 ~map[K]V2, K comparable, V1, V2 any](m1 M1, m2 M2, eq func(V1, V2) bool) bool {
+	if len(m1) != len(m2) {
+		return false
+	}
+	for k, v1 := range m1 {
+		if v2, ok := m2[k]; !ok || !eq(v1, v2) {
+			return false
+		}
+	}
+	return true
+}
+
+// clone is implemented in the runtime package.
+func clone(m any) any {
+	return m
+}
+
+// Clone returns a copy of m.  This is a shallow clone:
+// the new keys and values are set using ordinary assignment.
+func Clone[M ~map[K]V, K comparable, V any](m M) M {
+	// Preserve nil in case it matters.
+	if m == nil {
+		return nil
+	}
+	return clone(m).(M)
+}
+
+// Copy copies all key/value pairs in src adding them to dst.
+// When a key in src is already present in dst,
+// the value in dst will be overwritten by the value associated
+// with the key in src.
+func Copy[M1 ~map[K]V, M2 ~map[K]V, K comparable, V any](dst M1, src M2) {
+	for k, v := range src {
+		dst[k] = v
+	}
+}
+
+// DeleteFunc deletes any key/value pairs from m for which del returns true.
+func DeleteFunc[M ~map[K]V, K comparable, V any](m M, del func(K, V) bool) {
+	for k, v := range m {
+		if del(k, v) {
+			delete(m, k)
+		}
+	}
+}