use thiserror

svg-units/Cargo.toml

@@ -6,8 +6,8 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-err-derive = "0.3.1"
 lazy_static = "1.4.0"
 regex = "1.9.3"
 strum = "0.25.0"
 strum_macros = "0.25.2"
+thiserror = "1.0.47"

svg-units/src/measure.rs

@@ -1,7 +1,7 @@
 use super::SVGUnit;
-use err_derive::Error;
 use lazy_static::lazy_static;
 use regex::Regex;
+use thiserror::Error;
 use std::cmp::Ordering;
 use std::fmt;
 use std::num::ParseFloatError;
@@ -35,13 +35,13 @@ impl SVGMeasure {
     }
 }
 
-#[derive(Debug, Error)]
+#[derive(Error, Debug)]
 pub enum SVGMeasureParseError {
-    #[error(display = "Failed to parse measure number")]
-    ParseMeasure(#[source] ParseFloatError),
-    #[error(display = "Failed to parse measure unit")]
-    ParseUnit(#[source] ParseError),
-    #[error(display = "Invalid measure format")]
+    #[error("Failed to parse measure number")]
+    ParseMeasure(#[from] ParseFloatError),
+    #[error("Failed to parse measure unit")]
+    ParseUnit(#[from] ParseError),
+    #[error("Invalid measure format")]
     Invalid,
 }