gerror: fix #3633 Is performs the same as errors.Is from go stdlib (#3640)

errors/gerror/gerror.go

@@ -15,12 +15,6 @@ import (
 	"github.com/gogf/gf/v2/errors/gcode"
 )
 
-// IIs is the interface for Is feature.
-type IIs interface {
-	Error() string
-	Is(target error) bool
-}
-
 // IEqual is the interface for Equal feature.
 type IEqual interface {
 	Error() string

errors/gerror/gerror_api_stack.go

@@ -7,6 +7,7 @@
 package gerror
 
 import (
+	"errors"
 	"runtime"
 )
 
@@ -91,17 +92,17 @@ func Equal(err, target error) bool {
 }
 
 // Is reports whether current error `err` has error `target` in its chaining errors.
-// It is just for implements for stdlib errors.Is from Go version 1.17.
+// There's similar function HasError which is designed and implemented early before errors.Is of go stdlib.
+// It is now alias of errors.Is of go stdlib, to guarantee the same performance as go stdlib.
 func Is(err, target error) bool {
-	if e, ok := err.(IIs); ok {
-		return e.Is(target)
-	}
-	return false
+	return errors.Is(err, target)
 }
 
-// HasError is alias of Is, which more easily understanding semantics.
+// HasError performs as Is.
+// This function is designed and implemented early before errors.Is of go stdlib.
+// Deprecated: use Is instead.
 func HasError(err, target error) bool {
-	return Is(err, target)
+	return errors.Is(err, target)
 }
 
 // callers returns the stack callers.

errors/gerror/gerror_error.go

@@ -125,22 +125,3 @@ func (err *Error) Equal(target error) bool {
 	}
 	return true
 }
-
-// Is reports whether current error `err` has error `target` in its chaining errors.
-// It is just for implements for stdlib errors.Is from Go version 1.17.
-func (err *Error) Is(target error) bool {
-	if Equal(err, target) {
-		return true
-	}
-	nextErr := err.Unwrap()
-	if nextErr == nil {
-		return false
-	}
-	if Equal(nextErr, target) {
-		return true
-	}
-	if e, ok := nextErr.(IIs); ok {
-		return e.Is(target)
-	}
-	return false
-}

errors/gerror/gerror_z_example_test.go

@@ -77,7 +77,7 @@ func ExampleIs() {
 	fmt.Println(gerror.Is(err1, err2))
 
 	// Output:
-	// false
+	// true
 	// true
 	// true
 	// false

errors/gerror/gerror_z_unit_test.go

@@ -414,10 +414,28 @@ func Test_Is(t *testing.T) {
 		err2 := gerror.Wrap(err1, "2")
 		err2 = gerror.Wrap(err2, "3")
 		t.Assert(gerror.Is(err2, err1), true)
+
+		var (
+			errNotFound = errors.New("not found")
+			gerror1     = gerror.Wrap(errNotFound, "wrapped")
+			gerror2     = gerror.New("not found")
+		)
+		t.Assert(errors.Is(errNotFound, errNotFound), true)
+		t.Assert(errors.Is(nil, errNotFound), false)
+		t.Assert(errors.Is(nil, nil), true)
+
+		t.Assert(gerror.Is(errNotFound, errNotFound), true)
+		t.Assert(gerror.Is(nil, errNotFound), false)
+		t.Assert(gerror.Is(nil, nil), true)
+
+		t.Assert(errors.Is(gerror1, errNotFound), true)
+		t.Assert(errors.Is(gerror2, errNotFound), false)
+		t.Assert(gerror.Is(gerror1, errNotFound), true)
+		t.Assert(gerror.Is(gerror2, errNotFound), false)
 	})
 }
 
-func Test_HashError(t *testing.T) {
+func Test_HasError(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		err1 := errors.New("1")
 		err2 := gerror.Wrap(err1, "2")
@@ -426,7 +444,7 @@ func Test_HashError(t *testing.T) {
 	})
 }
 
-func Test_HashCode(t *testing.T) {
+func Test_HasCode(t *testing.T) {
 	gtest.C(t, func(t *gtest.T) {
 		t.Assert(gerror.HasCode(nil, gcode.CodeNotAuthorized), false)
 		err1 := errors.New("1")