1 files changed, 21 insertions, 1 deletions

diff --git a/forstio/core/error.h b/forstio/core/error.h
index 304b375..9708a07 100644
--- a/forstio/core/error.h
+++ b/forstio/core/error.h
@@ -115,6 +115,16 @@ struct no_error {
 	static constexpr bool is_critical = false;
 };
 
+struct recoverable {
+	static constexpr std::string_view description = "No error has occured";
+	static constexpr bool is_critical = false;
+};
+
+struct critical {
+	static constexpr std::string_view description = "No error has occured";
+	static constexpr bool is_critical = true;
+};
+
 struct buffer_exhausted {
 	static constexpr std::string_view description = "Buffer is too small";
 	static constexpr bool is_critical = false;
@@ -129,6 +139,16 @@ struct out_of_memory {
 	static constexpr std::string_view description = "Out of memory";
 	static constexpr bool is_critical = true;
 };
+
+struct invalid_state {
+	static constexpr std::string_view description = "Invalid state";
+	static constexpr bool is_critical = true;
+};
+
+struct not_supported {
+	static constexpr std::string_view description = "Not supported";
+	static constexpr bool is_critical = false;
+};
 }
 
 /**
@@ -163,7 +183,7 @@ private:
 				  "Don't use internal private types");
 
 public:
-	error_or() = default;
+	error_or():value_or_error_{fix_void<T>{}}{}
 	error_or(const fix_void<T> &value) : value_or_error_{value} {}
 
 	error_or(fix_void<T> &&value) : value_or_error_{std::move(value)} {}