flip positive/negative code paths

Author: codyoss

builder.go

@@ -20,10 +20,10 @@ type ErrorBuilder struct {
 // NewErrorBuilder creates error builder from an existing error type.
 func NewErrorBuilder(t *Type) *ErrorBuilder {
 	getMode := func() callStackBuildMode {
-		if t.modifiers.CollectStackTrace() {
-			return stackTraceCollect
+		if !t.modifiers.CollectStackTrace() {
+			return stackTraceOmit
 		}
-		return stackTraceOmit
+		return stackTraceCollect
 	}
 
 	return &ErrorBuilder{

wrap.go

@@ -65,10 +65,10 @@ func DecorateMany(message string, errs ...error) error {
 		return nil
 	}
 
-	if areAllOfTheSameType(errs...) {
-		return WrapMany(transparentWrapper, message, errs...)
+	if !areAllOfTheSameType(errs...) {
+		return WrapMany(opaqueWrapper, message, errs...)
 	}
-	return WrapMany(opaqueWrapper, message, errs...)
+	return WrapMany(transparentWrapper, message, errs...)
 }
 
 // WrapMany is a utility to wrap multiple errors.