internal/wasm-tools, internal/cm: udpate to go.bytecodealliance.org@v0.6.1 and cm@v0.2.1

src/internal/cm/case.go

@@ -1,7 +1,5 @@
 package cm
 
-import "errors"
-
 // CaseUnmarshaler returns an function that can unmarshal text into
 // [variant] or [enum] case T.
 //
@@ -33,8 +31,7 @@ func CaseUnmarshaler[T ~uint8 | ~uint16 | ~uint32](cases []string) func(v *T, te
 		if len(text) == 0 {
 			return errEmpty
 		}
-		s := string(text)
-		c, ok := m[s]
+		c, ok := m[string(text)]
 		if !ok {
 			return errNoMatchingCase
 		}
@@ -46,6 +43,14 @@ func CaseUnmarshaler[T ~uint8 | ~uint16 | ~uint32](cases []string) func(v *T, te
 const linearScanThreshold = 16
 
 var (
-	errEmpty          = errors.New("empty text")
-	errNoMatchingCase = errors.New("no matching case")
+	errEmpty          = &stringError{"empty text"}
+	errNoMatchingCase = &stringError{"no matching case"}
 )
+
+type stringError struct {
+	err string
+}
+
+func (err *stringError) Error() string {
+	return err.err
+}

src/internal/cm/list.go

@@ -1,8 +1,6 @@
 package cm
 
 import (
-	"bytes"
-	"encoding/json"
 	"unsafe"
 )
 
@@ -62,57 +60,3 @@ func (l list[T]) Data() *T {
 func (l list[T]) Len() uintptr {
 	return l.len
 }
-
-// MarshalJSON implements json.Marshaler.
-func (l list[T]) MarshalJSON() ([]byte, error) {
-	if l.len == 0 {
-		return []byte("[]"), nil
-	}
-
-	s := l.Slice()
-	var zero T
-	if unsafe.Sizeof(zero) == 1 {
-		// The default Go json.Encoder will marshal []byte as base64.
-		// We override that behavior so all int types have the same serialization format.
-		// []uint8{1,2,3} -> [1,2,3]
-		// []uint32{1,2,3} -> [1,2,3]
-		return json.Marshal(sliceOf(s))
-	}
-	return json.Marshal(s)
-}
-
-type slice[T any] []entry[T]
-
-func sliceOf[S ~[]E, E any](s S) slice[E] {
-	return *(*slice[E])(unsafe.Pointer(&s))
-}
-
-type entry[T any] [1]T
-
-func (v entry[T]) MarshalJSON() ([]byte, error) {
-	return json.Marshal(v[0])
-}
-
-// UnmarshalJSON implements json.Unmarshaler.
-func (l *list[T]) UnmarshalJSON(data []byte) error {
-	if bytes.Equal(data, nullLiteral) {
-		return nil
-	}
-
-	var s []T
-	err := json.Unmarshal(data, &s)
-	if err != nil {
-		return err
-	}
-
-	l.data = unsafe.SliceData([]T(s))
-	l.len = uintptr(len(s))
-
-	return nil
-}
-
-// nullLiteral is the JSON representation of a null literal.
-// By convention, to approximate the behavior of Unmarshal itself,
-// Unmarshalers implement UnmarshalJSON([]byte("null")) as a no-op.
-// See https://pkg.go.dev/encoding/json#Unmarshaler for more information.
-var nullLiteral = []byte("null")