unify godoc

Author: PeterIvanov

error.go

@@ -103,6 +103,14 @@ func (e *Error) HasTrait(key Trait) bool {
 	return false
 }
 
+// IsOfType is a proper type check for an errorx-based errors.
+// It takes the transparency and error types hierarchy into account,
+// so that type check against any supertype of the original cause passes.
+// Go 1.13 and above: it also tolerates non-errorx errors in chain if those errors support errors unwrap.
+func (e *Error) IsOfType(t *Type) bool {
+	return e.isOfType(t)
+}
+
 // Type returns the exact type of this error.
 // With transparent wrapping, such as in Decorate(), returns the type of the original cause.
 // The result is always not nil, even if the resulting type is impossible to successfully type check against.

error_112.go

@@ -2,18 +2,12 @@
 
 package errorx
 
-// IsOfType is a type check for errors.
-// Returns true either if both are of exactly the same type, or if the same is true for one of current type's ancestors.
-// For an error that does not have an errorx type, returns false.
-func IsOfType(err error, t *Type) bool {
+func isOfType(err error, t *Type) bool {
 	e := Cast(err)
 	return e != nil && e.IsOfType(t)
 }
 
-// IsOfType is a proper type check for an errorx-based errors.
-// It takes the transparency and error types hierarchy into account,
-// so that type check against any supertype of the original cause passes.
-func (e *Error) IsOfType(t *Type) bool {
+func (e *Error) isOfType(t *Type) bool {
 	cause := e
 	for cause != nil {
 		if !cause.transparent {

error_113.go

@@ -4,20 +4,12 @@ package errorx
 
 import "errors"
 
-// IsOfType is a type check for errors.
-// Returns true either if both are of exactly the same type, or if the same is true for one of current type's ancestors.
-// For an error that does not have an errorx type, returns false unless it wraps another error of errorx type.
-func IsOfType(err error, t *Type) bool {
+func isOfType(err error, t *Type) bool {
 	e := burrowForTyped(err)
 	return e != nil && e.IsOfType(t)
 }
 
-
-// IsOfType is a proper type check for an errorx-based errors.
-// It takes the transparency and error types hierarchy into account,
-// so that type check against any supertype of the original cause passes.
-// It also tolerates non-errorx errors in chain if those errors support go 1.13 errors unwrap.
-func (e *Error) IsOfType(t *Type) bool {
+func (e *Error) isOfType(t *Type) bool {
 	cause := e
 	for cause != nil {
 		if !cause.transparent {
@@ -44,5 +36,3 @@ func burrowForTyped(err error) *Error {
 
 	return nil
 }
-
-

error_113_test.go

@@ -122,4 +122,10 @@ func TestErrorsAndErrorx(t *testing.T) {
 		err := fmt.Errorf("error test: %w", Decorate(io.EOF, "test"))
 		require.True(t, errors.Is(err, io.EOF))
 	})
+
+	t.Run("Wrap", func(t *testing.T) {
+		err := fmt.Errorf("error test: %w", testType.Wrap(io.EOF, "test"))
+		require.False(t, errors.Is(err, io.EOF))
+		require.True(t, errors.Is(err, testType.NewWithNoMessage()))
+	})
 }

type.go

@@ -95,6 +95,14 @@ func (t *Type) HasTrait(key Trait) bool {
 	return ok
 }
 
+// IsOfType is a type check for errors.
+// Returns true either if both are of exactly the same type, or if the same is true for one of current type's ancestors.
+// Go 1.12 and below: for an error that does not have an errorx type, returns false.
+// Go 1.13 and above: for an error that does not have an errorx type, returns false unless it wraps another error of errorx type.
+func IsOfType(err error, t *Type) bool {
+	return isOfType(err, t)
+}
+
 // Supertype returns a parent type, if present.
 func (t *Type) Supertype() *Type {
 	return t.parent