From 625ab5bb37cbe35fd9662a33bc92f73520e59c81 Mon Sep 17 00:00:00 2001
From: troido <troido@protonmail.com>
Date: Mon, 17 Feb 2020 01:14:03 +0100
Subject: added trait for interacting with persistent storage; tried to make
 Results easier

---
 src/util.rs | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

(limited to 'src/util.rs')

diff --git a/src/util.rs b/src/util.rs
index 34d5670..1aee8a4 100644
--- a/src/util.rs
+++ b/src/util.rs
@@ -1,5 +1,6 @@
 
-
+use std::error::Error;
+use std::fmt::{Display, Formatter};
 use std::cmp::{min, max};
 use serde_json::Value;
 
@@ -12,6 +13,46 @@ pub trait ToJson {
 }
 
 
+pub type AnyError = Box<dyn Error + 'static>;
+pub type Result<T> = std::result::Result<T, AnyError>;
+
+#[derive(Debug)]
+pub struct AError {
+	text: String
+}
+
+impl AError {
+	pub fn new(txt: &str) -> Self{
+		AError {
+			text: txt.to_string()
+		}
+	}
+}
+
+impl Error for AError {
+	fn source(&self) -> Option<&(dyn Error + 'static)> {
+		None
+	}
+}
+
+impl Display for AError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        write!(f, "Error: {}", self.text)
+    }
+}
+
+
+#[macro_export]
+macro_rules! aerr {
+	($description:expr) => {Box::new(crate::util::AError::new($description))}
+}
+
+#[macro_export]
+macro_rules! err {
+	($description:expr) => {Err(crate::aerr!($description))}
+}
+
+
 #[macro_export]
 macro_rules! hashmap {
 	( $($key:expr => $value:expr ),* ) => {{
-- 
cgit