added Box<dyn Error> in IncorrectFormat error

Cargo.toml

@@ -45,7 +45,7 @@ futures = "0.3.1"
 pin-project = "0.4.6"
 serde_with_macros = "1.0.1"
 
-teloxide-macros = { path="../teloxide-macros" }
+teloxide-macros = { git="https://github.com/teloxide/teloxide-macros", branch="dev" }
 
 [dev-dependencies]
 smart-default = "0.6.0"

src/utils/command.rs

@@ -154,8 +154,9 @@ pub use teloxide_macros::BotCommand;
 /// fn accept_two_digits(input: String) -> Result<(u8,), ParseError> {
 ///     match input.len() {
 ///         2 => {
-///             let num =
-///                 input.parse().map_err(|_| ParseError::IncorrectFormat)?;
+///             let num = input
+///                 .parse::<u8>()
+///                 .map_err(|e| ParseError::IncorrectFormat(e.into()))?;
 ///             Ok((num,))
 ///         }
 ///         len => Err(ParseError::Custom(
@@ -214,7 +215,7 @@ pub enum ParseError {
     /// Redirected from [`FromStr::from_str`].
     ///
     /// [`FromStr::from_str`]: https://doc.rust-lang.org/std/str/trait.FromStr.html#tymethod.from_str
-    IncorrectFormat,
+    IncorrectFormat(Box<dyn Error>),
 
     UnknownCommand(PrefixedBotCommand),
     WrongBotName(BotName),

tests/command.rs

@@ -129,7 +129,11 @@ fn parse_custom_parser() {
         let vec = s.split_whitespace().collect::<Vec<_>>();
         let (left, right) = match vec.as_slice() {
             [l, r] => (l, r),
-            _ => return Err(ParseError::IncorrectFormat),
+            _ => {
+                return Err(ParseError::IncorrectFormat(
+                    "might be 2 arguments!".into(),
+                ))
+            }
         };
         left.parse::<u8>().map(|res| (res, right.to_string())).map_err(|_| {
             ParseError::Custom(