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

calltrace.go

@@ -6,15 +6,15 @@ import (
 	"strings"
 )
 
-// CallTrace represents a call stack trace similar to Java's stack trace
-type CallTrace struct {
+// CallStack represents a call stack trace similar to Java's stack trace
+type CallStack struct {
 	frames *runtime.Frames
 	more   bool
 }
 
 // Trace returns a new CallTrace starting from this call
 // Use skip to skip the first entries in the trace
-func Trace(skip int) *CallTrace {
+func Trace(skip int) *CallStack {
 	if DisableTrace {
 		return nil
 	}
@@ -22,10 +22,10 @@ func Trace(skip int) *CallTrace {
 	pc := make([]uintptr, CallStackLength+1)
 	n := runtime.Callers(skip+1, pc)
 	pc = pc[:n]
-	return &CallTrace{runtime.CallersFrames(pc), n == CallStackLength+1}
+	return &CallStack{runtime.CallersFrames(pc), n == CallStackLength+1}
 }
 
-func (ct *CallTrace) String() string {
+func (ct *CallStack) String() string {
 	if ct == nil {
 		return ""
 	}

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(": ")

error_tmpl.go

@@ -30,7 +30,7 @@ func (t *ErrTmpl) New(args ...interface{}) *Error {
 		msg:       fmt.Sprintf(t.format, args...),
 		cause:     nil,
 		tmpl:      t,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 	}
 }
 
@@ -40,7 +40,7 @@ func (t *ErrTmpl) Wrap(cause error, args ...interface{}) *Error {
 		msg:       fmt.Sprintf(t.format, args...),
 		cause:     cause,
 		tmpl:      t,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 	}
 }
 
@@ -49,7 +49,7 @@ func (t *ErrTmpl) Wrap(cause error, args ...interface{}) *Error {
 func (t *ErrTmpl) Chain(msg string, errors []error) *Error {
 	return &Error{
 		msg:       msg,
-		callTrace: Trace(2),
+		callStack: Trace(2),
 		tmpl:      t,
 		prev:      errors,
 	}