Add convert from strings

Signed-off-by: Michael Lodder <[email protected]>

ursa_core/Cargo.toml

@@ -15,4 +15,5 @@ serde = "1.0"
 serde_bare = "0.5"
 serde_cbor = "0.11"
 serde_json = "1.0"
+string-error = "0.1"
 thiserror = "1.0"

ursa_core/src/error.rs

@@ -1,3 +1,4 @@
+use string_error::*;
 use thiserror::Error as ThisError;
 
 /// The common errors that can occur in Ursa
@@ -32,5 +33,23 @@ pub enum UrsaError {
     Kind(Box<dyn std::error::Error>),
 }
 
+impl From<String> for UrsaError {
+    fn from(value: String) -> Self {
+        Self::Kind(into_err(value))
+    }
+}
+
+impl From<&String> for UrsaError {
+    fn from(value: &String) -> Self {
+        Self::Kind(into_err(value.clone()))
+    }
+}
+
+impl From<&str> for UrsaError {
+    fn from(value: &str) -> Self {
+        Self::Kind(new_err(value))
+    }
+}
+
 /// Results returned from ursa components
 pub type UrsaResult<T> = anyhow::Result<T, UrsaError>;