Use Box<dyn Error + Send + Sync> in the examples

CHANGELOG.md

@@ -34,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
    `#[non_exhaustive]` annotation is removed from the enum, type of `TargetMessage::Inline::inline_message_id` changed 
    `i32` => `String`. `TargetMessage` now implements `From<String>`, `get_game_high_scores` and `set_game_score` use 
    `Into<TargetMessage>` to accept `String`s. ([issue 253], [pr 257])
+ - Remove `ResponseResult` from `prelude`.
 
 [issue 253]: https://github.com/teloxide/teloxide/issues/253
 [pr 257]: https://github.com/teloxide/teloxide/pull/257

README.md

@@ -130,7 +130,9 @@ Commands are strongly typed and defined declaratively, similar to how we define
 
 ([Full](./examples/simple_commands_bot/src/main.rs))
 ```rust,no_run
-use teloxide::{utils::command::BotCommand, prelude::*};
+use teloxide::{prelude::*, utils::command::BotCommand};
+
+use std::error::Error;
 
 #[derive(BotCommand)]
 #[command(rename = "lowercase", description = "These commands are supported:")]
@@ -143,14 +145,17 @@ enum Command {
     UsernameAndAge { username: String, age: u8 },
 }
 
-async fn answer(cx: UpdateWithCx<AutoSend<Bot>, Message>, command: Command) -> ResponseResult<()> {
+async fn answer(
+    cx: UpdateWithCx<AutoSend<Bot>, Message>,
+    command: Command,
+) -> Result<(), Box<dyn Error + Send + Sync>> {
     match command {
         Command::Help => cx.answer(Command::descriptions()).send().await?,
         Command::Username(username) => {
-            cx.answer_str(format!("Your username is @{}.", username)).await?
+            cx.answer(format!("Your username is @{}.", username)).await?
         }
         Command::UsernameAndAge { username, age } => {
-            cx.answer_str(format!("Your username is @{} and age is {}.", username, age)).await?
+            cx.answer(format!("Your username is @{} and age is {}.", username, age)).await?
         }
     };
 

examples/admin_bot/src/main.rs

@@ -1,4 +1,4 @@
-use std::{convert::TryInto, str::FromStr};
+use std::{convert::TryInto, error::Error, str::FromStr};
 
 use teloxide::{prelude::*, utils::command::BotCommand};
 
@@ -65,7 +65,7 @@ fn calc_restrict_time(time: u32, unit: UnitOfTime) -> u32 {
 type Cx = UpdateWithCx<AutoSend<Bot>, Message>;
 
 // Mute a user with a replied message.
-async fn mute_user(cx: &Cx, time: u32) -> ResponseResult<()> {
+async fn mute_user(cx: &Cx, time: u32) -> Result<(), Box<dyn Error + Send + Sync>> {
     match cx.update.reply_to_message() {
         Some(msg1) => {
             cx.requester
@@ -85,7 +85,7 @@ async fn mute_user(cx: &Cx, time: u32) -> ResponseResult<()> {
 }
 
 // Kick a user with a replied message.
-async fn kick_user(cx: &Cx) -> ResponseResult<()> {
+async fn kick_user(cx: &Cx) -> Result<(), Box<dyn Error + Send + Sync>> {
     match cx.update.reply_to_message() {
         Some(mes) => {
             // bot.unban_chat_member can also kicks a user from a group chat.
@@ -102,7 +102,7 @@ async fn kick_user(cx: &Cx) -> ResponseResult<()> {
 }
 
 // Ban a user with replied message.
-async fn ban_user(cx: &Cx, time: u32) -> ResponseResult<()> {
+async fn ban_user(cx: &Cx, time: u32) -> Result<(), Box<dyn Error + Send + Sync>> {
     match cx.update.reply_to_message() {
         Some(message) => {
             cx.requester
@@ -120,7 +120,7 @@ async fn ban_user(cx: &Cx, time: u32) -> ResponseResult<()> {
     Ok(())
 }
 
-async fn action(cx: Cx, command: Command) -> ResponseResult<()> {
+async fn action(cx: Cx, command: Command) -> Result<(), Box<dyn Error + Send + Sync>> {
     match command {
         Command::Help => cx.answer(Command::descriptions()).send().await.map(|_| ())?,
         Command::Kick => kick_user(&cx).await?,

examples/simple_commands_bot/src/main.rs

@@ -1,5 +1,7 @@
 use teloxide::{prelude::*, utils::command::BotCommand};
 
+use std::error::Error;
+
 #[derive(BotCommand)]
 #[command(rename = "lowercase", description = "These commands are supported:")]
 enum Command {
@@ -11,7 +13,10 @@ enum Command {
     UsernameAndAge { username: String, age: u8 },
 }
 
-async fn answer(cx: UpdateWithCx<AutoSend<Bot>, Message>, command: Command) -> ResponseResult<()> {
+async fn answer(
+    cx: UpdateWithCx<AutoSend<Bot>, Message>,
+    command: Command,
+) -> Result<(), Box<dyn Error + Send + Sync>> {
     match command {
         Command::Help => cx.answer(Command::descriptions()).send().await?,
         Command::Username(username) => {

examples/sqlite_remember_bot/src/main.rs

@@ -29,7 +29,7 @@ async fn handle_message(
     cx: UpdateWithCx<AutoSend<Bot>, Message>,
     dialogue: Dialogue,
 ) -> TransitionOut<Dialogue> {
-    match cx.update.text_owned() {
+    match cx.update.text().map(ToOwned::to_owned) {
         None => {
             cx.answer("Send me a text message.").await?;
             next(dialogue)

src/lib.rs

@@ -66,7 +66,6 @@ pub mod utils;
 #[doc(inline)]
 pub use teloxide_core::*;
 
-use teloxide_core::requests::ResponseResult;
 #[cfg(feature = "macros")]
 // FIXME(waffle): use `docsrs` here when issue with combine is resolved <https://github.com/teloxide/teloxide/pull/305#issuecomment-716172103>
 #[cfg_attr(all(teloxide_docsrs, feature = "nightly"), doc(cfg(feature = "macros")))]
@@ -76,6 +75,8 @@ pub use teloxide_macros::teloxide;
 #[doc(include = "../README.md")]
 enum ReadmeDocTests {}
 
+use teloxide_core::requests::ResponseResult;
+
 /// A shortcut for `ResponseResult::Ok(val)`.
 pub fn respond<T>(val: T) -> ResponseResult<T> {
     ResponseResult::Ok(val)

src/prelude.rs

@@ -14,7 +14,7 @@ pub use crate::{
 
 pub use teloxide_core::{
     adaptors::AutoSend,
-    requests::{Request, ResponseResult},
+    requests::Request,
     types::{
         CallbackQuery, ChatMemberUpdated, ChosenInlineResult, InlineQuery, Message, Poll,
         PollAnswer, PreCheckoutQuery, ShippingQuery,