renamed CallTrace to CallStack and implemented Error.Stack() method

error.go

@@ -9,7 +9,7 @@ import (
 // Error is a wrapper for error with stack trace
 type Error struct {
 	msg       string
-	callTrace *CallTrace
+	callStack *CallStack
 	tmpl      *ErrTmpl
 	cause     error
 	prev      []error
@@ -19,7 +19,7 @@ type Error struct {
 func New(msg string) *Error {
 	return &Error{
 		msg:       msg,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 	}
 }
 
@@ -28,7 +28,7 @@ func Wrap(msg string, cause error) *Error {
 	return &Error{
 		msg:       msg,
 		cause:     cause,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 	}
 }
 
@@ -37,7 +37,7 @@ func Wrap(msg string, cause error) *Error {
 func Chain(msg string, errors []error) *Error {
 	return &Error{
 		msg:       msg,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 		prev:      errors,
 	}
 }
@@ -70,6 +70,10 @@ func (e *Error) Message() string {
 	return e.msg
 }
 
+func (e *Error) Stack() *CallStack {
+	return e.callStack
+}
+
 // Is implements the error equality function used by errors.Is()
 // It returns true if the error is the same instance or is created using the same ErrTmpl
 func (e *Error) Is(target error) bool {
@@ -137,7 +141,7 @@ func printErr(err error, b *strings.Builder) {
 		b.WriteString(": ")
 		b.WriteString(e.msg)
 		b.WriteString("\n")
-		b.WriteString(e.callTrace.String())
+		b.WriteString(e.callStack.String())
 	} else {
 		b.WriteString(errtype(err))
 		b.WriteString(": ")