Merge pull request #242 from teloxide/MUST_USE

Add some `#[must_use]`s

CHANGELOG.md

@@ -19,6 +19,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 [pr241]: https://github.com/teloxide/teloxide-core/pull/241
 
+### Changed
+
+- More functions are now marked with `#[must_use]` ([#242][PR242])
+
+[pr242]: https://github.com/teloxide/teloxide-core/pull/242
+
 ## 0.7.0 - 2022-07-19
 
 ### Added

src/adaptors/throttle/settings.rs

@@ -21,6 +21,7 @@ type BoxedFuture = Pin<Box<dyn Future<Output = ()> + Send>>;
 /// ```
 ///
 /// [`Throttle`]: crate::adaptors::throttle::Throttle
+#[must_use]
 #[non_exhaustive]
 pub struct Settings {
     pub limits: Limits,

src/bot.rs

@@ -51,6 +51,7 @@ const TELOXIDE_TOKEN: &str = "TELOXIDE_TOKEN";
 ///
 /// [`Arc`]: std::sync::Arc
 /// [Telegram Bot API]: https://core.telegram.org/bots/api
+#[must_use]
 #[derive(Debug, Clone)]
 pub struct Bot {
     token: Arc<str>,
@@ -186,16 +187,19 @@ impl Bot {
 /// Getters
 impl Bot {
     /// Returns currently used token.
+    #[must_use]
     pub fn token(&self) -> &str {
         &self.token
     }
 
     /// Returns currently used http-client.
+    #[must_use]
     pub fn client(&self) -> &Client {
         &self.client
     }
 
     /// Returns currently used token API url.
+    #[must_use]
     pub fn api_url(&self) -> reqwest::Url {
         reqwest::Url::clone(&*self.api_url)
     }

src/net.rs

@@ -34,6 +34,7 @@ pub const TELEGRAM_API_URL: &str = "https://api.telegram.org";
 /// ## Panics
 ///
 /// If `TELOXIDE_PROXY` exists, but isn't correct url.
+#[must_use]
 pub fn client_from_env() -> reqwest::Client {
     use reqwest::Proxy;
 

src/types/chat.rs

@@ -191,10 +191,12 @@ pub struct PublicChatSupergroup {
 }
 
 impl Chat {
+    #[must_use]
     pub fn is_private(&self) -> bool {
         matches!(self.kind, ChatKind::Private(_))
     }
 
+    #[must_use]
     pub fn is_group(&self) -> bool {
         matches!(
             self.kind,
@@ -205,6 +207,7 @@ impl Chat {
         )
     }
 
+    #[must_use]
     pub fn is_supergroup(&self) -> bool {
         matches!(
             self.kind,
@@ -215,6 +218,7 @@ impl Chat {
         )
     }
 
+    #[must_use]
     pub fn is_channel(&self) -> bool {
         matches!(
             self.kind,
@@ -225,6 +229,7 @@ impl Chat {
         )
     }
 
+    #[must_use]
     pub fn is_chat(&self) -> bool {
         self.is_private() || self.is_group() || self.is_supergroup()
     }
@@ -233,6 +238,7 @@ impl Chat {
 /// Getters
 impl Chat {
     /// A title, for supergroups, channels and group chats.
+    #[must_use]
     pub fn title(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Public(this) => this.title.as_deref(),
@@ -241,6 +247,7 @@ impl Chat {
     }
 
     /// A username, for private chats, supergroups and channels if available.
+    #[must_use]
     pub fn username(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Public(this) => match &this.kind {
@@ -258,6 +265,7 @@ impl Chat {
     /// identifier for a channel and vice versa. Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn linked_chat_id(&self) -> Option<i64> {
         match &self.kind {
             ChatKind::Public(this) => match &this.kind {
@@ -275,6 +283,7 @@ impl Chat {
     /// only from [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn permissions(&self) -> Option<ChatPermissions> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Group(PublicChatGroup { permissions })
@@ -291,6 +300,7 @@ impl Chat {
     /// [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn sticker_set_name(&self) -> Option<&str> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -305,6 +315,7 @@ impl Chat {
     /// from [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn can_set_sticker_set(&self) -> Option<bool> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -319,6 +330,7 @@ impl Chat {
     /// unpriviledged user. Returned only from [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn slow_mode_delay(&self) -> Option<u32> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -333,6 +345,7 @@ impl Chat {
     /// [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn location(&self) -> Option<&ChatLocation> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -347,6 +360,7 @@ impl Chat {
     /// messages. Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn join_to_send_messages(&self) -> Option<True> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -361,6 +375,7 @@ impl Chat {
     /// by supergroup administrators. Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn join_by_request(&self) -> Option<True> {
         if let ChatKind::Public(this) = &self.kind {
             if let PublicChatKind::Supergroup(this) = &this.kind {
@@ -375,6 +390,7 @@ impl Chat {
     /// only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn description(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Public(this) => this.description.as_deref(),
@@ -392,6 +408,7 @@ impl Chat {
     /// crate::payloads::ExportChatInviteLink
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn invite_link(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Public(this) => this.invite_link.as_deref(),
@@ -403,6 +420,7 @@ impl Chat {
     /// Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn has_protected_content(&self) -> Option<True> {
         match &self.kind {
             ChatKind::Public(this) => this.has_protected_content,
@@ -411,6 +429,7 @@ impl Chat {
     }
 
     /// A first name of the other party in a private chat.
+    #[must_use]
     pub fn first_name(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Private(this) => this.first_name.as_deref(),
@@ -419,6 +438,7 @@ impl Chat {
     }
 
     /// A last name of the other party in a private chat.
+    #[must_use]
     pub fn last_name(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Private(this) => this.last_name.as_deref(),
@@ -429,6 +449,7 @@ impl Chat {
     /// Bio of the other party in a private chat. Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn bio(&self) -> Option<&str> {
         match &self.kind {
             ChatKind::Private(this) => this.bio.as_deref(),
@@ -441,6 +462,7 @@ impl Chat {
     /// user. Returned only in [`GetChat`].
     ///
     /// [`GetChat`]: crate::payloads::GetChat
+    #[must_use]
     pub fn has_private_forwards(&self) -> Option<True> {
         match &self.kind {
             ChatKind::Private(this) => this.has_private_forwards,

src/types/chat_id.rs

@@ -31,6 +31,7 @@ pub(crate) enum BareChatId {
 
 impl ChatId {
     /// Returns `true` if this is an id of a user.
+    #[must_use]
     pub fn is_user(self) -> bool {
         matches!(self.to_bare(), BareChatId::User(_))
     }
@@ -38,11 +39,13 @@ impl ChatId {
     /// Returns `true` if this is an id of a group.
     ///
     /// Note: supergroup is **not** considered a group.
+    #[must_use]
     pub fn is_group(self) -> bool {
         matches!(self.to_bare(), BareChatId::Group(_))
     }
 
     /// Returns `true` if this is an id of a channel.
+    #[must_use]
     pub fn is_channel_or_supergroup(self) -> bool {
         matches!(self.to_bare(), BareChatId::Channel(_))
     }

src/types/chat_member.rs

@@ -147,6 +147,7 @@ impl Deref for ChatMember {
 /// Simple methods for checking a user status.
 impl ChatMemberKind {
     /// Returns chat member status.
+    #[must_use]
     pub fn status(&self) -> ChatMemberStatus {
         match self {
             ChatMemberKind::Owner(_) => ChatMemberStatus::Owner,
@@ -161,6 +162,7 @@ impl ChatMemberKind {
     /// Returns `true` if the user is the [owner] of the given chat.
     ///
     /// [owner]: ChatMemberKind::Owner
+    #[must_use]
     pub fn is_owner(&self) -> bool {
         matches!(self, Self::Owner { .. })
     }
@@ -173,6 +175,7 @@ impl ChatMemberKind {
     /// owner of the given chat. See also: [`is_privileged`].
     ///
     /// [`is_privileged`]: ChatMemberKind::is_privileged
+    #[must_use]
     pub fn is_administrator(&self) -> bool {
         matches!(self, Self::Administrator { .. })
     }
@@ -180,6 +183,7 @@ impl ChatMemberKind {
     /// Returns `true` if the user is a common [member] of the given chat.
     ///
     /// [member]: ChatMemberKind::Member
+    #[must_use]
     pub fn is_member(&self) -> bool {
         matches!(self, Self::Member { .. })
     }
@@ -187,6 +191,7 @@ impl ChatMemberKind {
     /// Returns `true` if the user is [restricted] in the given chat.
     ///
     /// [restricted]: ChatMemberKind::Restricted
+    #[must_use]
     pub fn is_restricted(&self) -> bool {
         matches!(self, Self::Restricted { .. })
     }
@@ -194,6 +199,7 @@ impl ChatMemberKind {
     /// Returns `true` if the user [left] the given chat.
     ///
     /// [left]: ChatMemberKind::Left
+    #[must_use]
     pub fn is_left(&self) -> bool {
         matches!(self, Self::Left { .. })
     }
@@ -201,6 +207,7 @@ impl ChatMemberKind {
     /// Returns `true` if the user is [banned] in the given chat.
     ///
     /// [banned]: ChatMemberKind::Banned
+    #[must_use]
     pub fn is_banned(&self) -> bool {
         matches!(self, Self::Banned { .. })
     }
@@ -209,6 +216,7 @@ impl ChatMemberKind {
     ///
     /// [kicked]: ChatMemberKind::Banned
     #[deprecated = "use `is_banned` instead"]
+    #[must_use]
     pub fn is_kicked(&self) -> bool {
         self.is_banned()
     }
@@ -217,6 +225,7 @@ impl ChatMemberKind {
     ///
     /// [creator]: ChatMemberKind::Owner
     #[deprecated = "use `is_owner` instead"]
+    #[must_use]
     pub fn is_creator(&self) -> bool {
         self.is_owner()
     }
@@ -229,6 +238,7 @@ impl ChatMemberKind {
     ///
     /// [owner]: ChatMemberKind::Owner
     /// [administrator]: ChatMemberKind::Administrator
+    #[must_use]
     pub fn is_privileged(&self) -> bool {
         self.is_administrator() || self.is_owner()
     }
@@ -238,6 +248,7 @@ impl ChatMemberKind {
     ///
     /// [left]: ChatMemberKind::Left
     /// [banned]: ChatMemberKind::Banned
+    #[must_use]
     pub fn is_present(&self) -> bool {
         !(self.is_left() || self.is_banned())
     }
@@ -246,6 +257,7 @@ impl ChatMemberKind {
 impl ChatMemberKind {
     /// Getter for [`Administrator::custom_title`] and [`Owner::custom_title`]
     /// fields.
+    #[must_use]
     pub fn custom_title(&self) -> Option<&str> {
         match &self {
             Self::Administrator(Administrator { custom_title, .. })
@@ -261,6 +273,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_manage_chat`]: Administrator::can_manage_chat
+    #[must_use]
     pub fn is_anonymous(&self) -> bool {
         match self {
             Self::Owner(Owner { is_anonymous, .. })
@@ -270,6 +283,7 @@ impl ChatMemberKind {
     }
 
     /// Getter for [`Restricted::until_date`] and [`Banned::until_date`] fields.
+    #[must_use]
     pub fn until_date(&self) -> Option<UntilDate> {
         match &self {
             Self::Owner(_) | Self::Administrator(_) | Self::Member | Self::Left => None,
@@ -283,6 +297,7 @@ impl ChatMemberKind {
 impl ChatMemberKind {
     /// Returns `true` if the user is an administrator in the given chat and the
     /// bot is allowed to edit administrator privileges of that user.
+    #[must_use]
     pub fn can_be_edited(&self) -> bool {
         match self {
             Self::Administrator(Administrator { can_be_edited, .. }) => *can_be_edited,
@@ -305,6 +320,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_manage_chat`]: Administrator::can_manage_chat
+    #[must_use]
     pub fn can_manage_chat(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -325,6 +341,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_change_info`]: Administrator::can_change_info
+    #[must_use]
     pub fn can_change_info(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -344,6 +361,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_post_messages`]: Administrator::can_post_messages
+    #[must_use]
     pub fn can_post_messages(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -364,6 +382,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_edit_messages`]: Administrator::can_edit_messages
+    #[must_use]
     pub fn can_edit_messages(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -383,6 +402,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_delete_messages`]: Administrator::can_delete_messages
+    #[must_use]
     pub fn can_delete_messages(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -403,6 +423,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_manage_video_chats`]: Administrator::can_manage_video_chats
+    #[must_use]
     pub fn can_manage_video_chats(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -415,6 +436,7 @@ impl ChatMemberKind {
     }
 
     #[deprecated(since = "0.6.0", note = "renamed to `can_manage_video_chats`")]
+    #[must_use]
     pub fn can_manage_voice_chats(&self) -> bool {
         self.can_manage_video_chats()
     }
@@ -428,6 +450,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_invite_users`]: Administrator::can_invite_users
+    #[must_use]
     pub fn can_invite_users(&self) -> bool {
         match &self {
             Self::Owner(_) => true,
@@ -447,6 +470,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_restrict_members`]: Administrator::can_restrict_members
+    #[must_use]
     pub fn can_restrict_members(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -467,6 +491,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_pin_messages`]: Administrator::can_pin_messages
+    #[must_use]
     pub fn can_pin_messages(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -489,6 +514,7 @@ impl ChatMemberKind {
     /// Returns `false` otherwise.
     ///
     /// [`can_promote_members`]: Administrator::can_promote_members
+    #[must_use]
     pub fn can_promote_members(&self) -> bool {
         match self {
             Self::Owner(_) => true,
@@ -512,6 +538,7 @@ impl ChatMemberKind {
     /// Returns `true` otherwise.
     ///
     /// [`can_send_messages`]: Restricted::can_send_messages
+    #[must_use]
     pub fn can_send_messages(&self) -> bool {
         match &self {
             Self::Restricted(Restricted {
@@ -531,6 +558,7 @@ impl ChatMemberKind {
     /// Returns `true` otherwise.
     ///
     /// [`can_send_media_messages`]: Restricted::can_send_media_messages
+    #[must_use]
     pub fn can_send_media_messages(&self) -> bool {
         match &self {
             Self::Restricted(Restricted {
@@ -551,6 +579,7 @@ impl ChatMemberKind {
     /// Returns `true` otherwise.
     ///
     /// [`can_send_media_messages`]: Restricted::can_send_media_messages
+    #[must_use]
     pub fn can_send_other_messages(&self) -> bool {
         match &self {
             Self::Restricted(Restricted {
@@ -571,6 +600,7 @@ impl ChatMemberKind {
     /// Returns `true` otherwise.
     ///
     /// [`can_send_media_messages`]: Restricted::can_send_media_messages
+    #[must_use]
     pub fn can_add_web_page_previews(&self) -> bool {
         match &self {
             Self::Restricted(Restricted {
@@ -601,6 +631,7 @@ impl ChatMemberStatus {
     /// Returns `true` if the user is the [owner] of the given chat.
     ///
     /// [owner]: ChatMemberKind::Owner
+    #[must_use]
     pub fn is_owner(&self) -> bool {
         matches!(self, Self::Owner { .. })
     }
@@ -613,6 +644,7 @@ impl ChatMemberStatus {
     /// owner of the given chat. See also: [`is_privileged`].
     ///
     /// [`is_privileged`]: ChatMemberKind::is_privileged
+    #[must_use]
     pub fn is_administrator(&self) -> bool {
         matches!(self, Self::Administrator { .. })
     }
@@ -620,6 +652,7 @@ impl ChatMemberStatus {
     /// Returns `true` if the user is a common [member] of the given chat.
     ///
     /// [member]: ChatMemberKind::Member
+    #[must_use]
     pub fn is_member(&self) -> bool {
         matches!(self, Self::Member { .. })
     }
@@ -627,6 +660,7 @@ impl ChatMemberStatus {
     /// Returns `true` if the user is [restricted] in the given chat.
     ///
     /// [restricted]: ChatMemberKind::Restricted
+    #[must_use]
     pub fn is_restricted(&self) -> bool {
         matches!(self, Self::Restricted { .. })
     }
@@ -634,6 +668,7 @@ impl ChatMemberStatus {
     /// Returns `true` if the user [left] the given chat.
     ///
     /// [left]: ChatMemberKind::Left
+    #[must_use]
     pub fn is_left(&self) -> bool {
         matches!(self, Self::Left { .. })
     }
@@ -641,6 +676,7 @@ impl ChatMemberStatus {
     /// Returns `true` if the user is [banned] in the given chat.
     ///
     /// [banned]: ChatMemberKind::Banned
+    #[must_use]
     pub fn is_banned(&self) -> bool {
         matches!(self, Self::Banned { .. })
     }
@@ -653,6 +689,7 @@ impl ChatMemberStatus {
     ///
     /// [owner]: ChatMemberKind::Owner
     /// [administrator]: ChatMemberKind::Administrator
+    #[must_use]
     pub fn is_privileged(&self) -> bool {
         self.is_administrator() || self.is_owner()
     }
@@ -662,6 +699,7 @@ impl ChatMemberStatus {
     ///
     /// [left]: ChatMemberKind::Left
     /// [banned]: ChatMemberKind::Banned
+    #[must_use]
     pub fn is_present(&self) -> bool {
         !(self.is_left() || self.is_banned())
     }

src/types/force_reply.rs

@@ -33,6 +33,7 @@ pub struct ForceReply {
 }
 
 impl ForceReply {
+    #[must_use]
     pub const fn new() -> Self {
         Self {
             force_reply: True,
@@ -49,6 +50,7 @@ impl ForceReply {
         self
     }
 
+    #[must_use]
     pub const fn selective(mut self, val: bool) -> Self {
         self.selective = Some(val);
         self

src/types/inline_keyboard_button.rs

@@ -218,6 +218,7 @@ impl InlineKeyboardButton {
         since = "0.7.0",
         note = "set correct kind in the constructor or access the field directly"
     )]
+    #[must_use]
     pub fn kind(mut self, val: InlineKeyboardButtonKind) -> Self {
         self.kind = val;
         self

src/types/inline_keyboard_markup.rs

@@ -66,6 +66,7 @@ impl InlineKeyboardMarkup {
         self
     }
 
+    #[must_use]
     pub fn append_to_row(mut self, index: usize, button: InlineKeyboardButton) -> Self {
         match self.inline_keyboard.get_mut(index) {
             Some(buttons) => buttons.push(button),

src/types/inline_query.rs

@@ -60,11 +60,13 @@ impl InlineQuery {
         self
     }
 
+    #[must_use]
     pub fn from(mut self, val: User) -> Self {
         self.from = val;
         self
     }
 
+    #[must_use]
     pub fn location(mut self, val: Location) -> Self {
         self.location = Some(val);
         self

src/types/inline_query_result_article.rs

@@ -76,21 +76,25 @@ impl InlineQueryResultArticle {
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = val;
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn url(mut self, val: reqwest::Url) -> Self {
         self.url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn hide_url(mut self, val: bool) -> Self {
         self.hide_url = Some(val);
         self
@@ -104,16 +108,19 @@ impl InlineQueryResultArticle {
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_width(mut self, val: i32) -> Self {
         self.thumb_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_height(mut self, val: i32) -> Self {
         self.thumb_height = Some(val);
         self

src/types/inline_query_result_audio.rs

@@ -79,6 +79,7 @@ impl InlineQueryResultAudio {
         self
     }
 
+    #[must_use]
     pub fn audio_url(mut self, val: reqwest::Url) -> Self {
         self.audio_url = val;
         self
@@ -100,6 +101,7 @@ impl InlineQueryResultAudio {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -129,11 +131,13 @@ impl InlineQueryResultAudio {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_audio.rs

@@ -83,6 +83,7 @@ impl InlineQueryResultCachedAudio {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -96,11 +97,13 @@ impl InlineQueryResultCachedAudio {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_document.rs

@@ -108,6 +108,7 @@ impl InlineQueryResultCachedDocument {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -121,11 +122,13 @@ impl InlineQueryResultCachedDocument {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_gif.rs

@@ -96,6 +96,7 @@ impl InlineQueryResultCachedGif {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -109,11 +110,13 @@ impl InlineQueryResultCachedGif {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_mpeg4_gif.rs

@@ -88,6 +88,7 @@ impl InlineQueryResultCachedMpeg4Gif {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -101,11 +102,13 @@ impl InlineQueryResultCachedMpeg4Gif {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_photo.rs

@@ -107,6 +107,7 @@ impl InlineQueryResultCachedPhoto {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -120,11 +121,13 @@ impl InlineQueryResultCachedPhoto {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_sticker.rs

@@ -57,11 +57,13 @@ impl InlineQueryResultCachedSticker {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_video.rs

@@ -108,6 +108,7 @@ impl InlineQueryResultCachedVideo {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -121,11 +122,13 @@ impl InlineQueryResultCachedVideo {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_cached_voice.rs

@@ -96,6 +96,7 @@ impl InlineQueryResultCachedVoice {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -109,11 +110,13 @@ impl InlineQueryResultCachedVoice {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_contact.rs

@@ -109,26 +109,31 @@ impl InlineQueryResultContact {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_width(mut self, val: i32) -> Self {
         self.thumb_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_height(mut self, val: i32) -> Self {
         self.thumb_height = Some(val);
         self

src/types/inline_query_result_document.rs

@@ -87,6 +87,7 @@ impl InlineQueryResultDocument {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -100,11 +101,13 @@ impl InlineQueryResultDocument {
         self
     }
 
+    #[must_use]
     pub fn document_url(mut self, val: reqwest::Url) -> Self {
         self.document_url = val;
         self
     }
 
+    #[must_use]
     pub fn mime_type(mut self, val: Mime) -> Self {
         self.mime_type = val;
         self
@@ -118,26 +121,31 @@ impl InlineQueryResultDocument {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_width(mut self, val: i32) -> Self {
         self.thumb_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_height(mut self, val: i32) -> Self {
         self.thumb_height = Some(val);
         self

src/types/inline_query_result_game.rs

@@ -51,6 +51,7 @@ impl InlineQueryResultGame {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self

src/types/inline_query_result_gif.rs

@@ -86,26 +86,31 @@ impl InlineQueryResultGif {
         self
     }
 
+    #[must_use]
     pub fn gif_url(mut self, val: reqwest::Url) -> Self {
         self.gif_url = val;
         self
     }
 
+    #[must_use]
     pub fn gif_width(mut self, val: i32) -> Self {
         self.gif_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn gif_height(mut self, val: i32) -> Self {
         self.gif_height = Some(val);
         self
     }
 
+    #[must_use]
     pub fn gif_duration(mut self, val: i32) -> Self {
         self.gif_duration = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = val;
         self
@@ -127,6 +132,7 @@ impl InlineQueryResultGif {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -140,11 +146,13 @@ impl InlineQueryResultGif {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_location.rs

@@ -89,11 +89,13 @@ impl InlineQueryResultLocation {
         self
     }
 
+    #[must_use]
     pub fn latitude(mut self, val: f64) -> Self {
         self.latitude = val;
         self
     }
 
+    #[must_use]
     pub fn longitude(mut self, val: f64) -> Self {
         self.longitude = val;
         self
@@ -107,46 +109,55 @@ impl InlineQueryResultLocation {
         self
     }
 
+    #[must_use]
     pub fn horizontal_accuracy<S>(mut self, val: f64) -> Self {
         self.horizontal_accuracy = Some(val);
         self
     }
 
+    #[must_use]
     pub fn live_period(mut self, val: i32) -> Self {
         self.live_period = Some(val);
         self
     }
 
+    #[must_use]
     pub fn heading(mut self, val: u16) -> Self {
         self.heading = Some(val);
         self
     }
 
+    #[must_use]
     pub fn proximity_alert_radius(mut self, val: u32) -> Self {
         self.proximity_alert_radius = Some(val);
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_width(mut self, val: u32) -> Self {
         self.thumb_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_height(mut self, val: u32) -> Self {
         self.thumb_height = Some(val);
         self

src/types/inline_query_result_mpeg4_gif.rs

@@ -87,26 +87,31 @@ impl InlineQueryResultMpeg4Gif {
         self
     }
 
+    #[must_use]
     pub fn mpeg4_url(mut self, val: reqwest::Url) -> Self {
         self.mpeg4_url = val;
         self
     }
 
+    #[must_use]
     pub fn mpeg4_width(mut self, val: i32) -> Self {
         self.mpeg4_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn mpeg4_height(mut self, val: i32) -> Self {
         self.mpeg4_height = Some(val);
         self
     }
 
+    #[must_use]
     pub fn mpeg4_duration(mut self, val: i32) -> Self {
         self.mpeg4_duration = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = val;
         self
@@ -128,6 +133,7 @@ impl InlineQueryResultMpeg4Gif {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -141,11 +147,13 @@ impl InlineQueryResultMpeg4Gif {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_photo.rs

@@ -87,21 +87,25 @@ impl InlineQueryResultPhoto {
         self
     }
 
+    #[must_use]
     pub fn photo_url(mut self, val: reqwest::Url) -> Self {
         self.photo_url = val;
         self
     }
 
+    #[must_use]
     pub fn thumb_url<S>(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = val;
         self
     }
 
+    #[must_use]
     pub fn photo_width(mut self, val: i32) -> Self {
         self.photo_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn photo_height(mut self, val: i32) -> Self {
         self.photo_height = Some(val);
         self
@@ -131,6 +135,7 @@ impl InlineQueryResultPhoto {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -144,11 +149,13 @@ impl InlineQueryResultPhoto {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_venue.rs

@@ -94,11 +94,13 @@ impl InlineQueryResultVenue {
         self
     }
 
+    #[must_use]
     pub fn latitude(mut self, val: f64) -> Self {
         self.latitude = val;
         self
     }
 
+    #[must_use]
     pub fn longitude(mut self, val: f64) -> Self {
         self.longitude = val;
         self
@@ -152,26 +154,31 @@ impl InlineQueryResultVenue {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_width(mut self, val: i32) -> Self {
         self.thumb_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn thumb_height(mut self, val: i32) -> Self {
         self.thumb_height = Some(val);
         self

src/types/inline_query_result_video.rs

@@ -109,16 +109,19 @@ impl InlineQueryResultVideo {
         self
     }
 
+    #[must_use]
     pub fn video_url(mut self, val: reqwest::Url) -> Self {
         self.video_url = val;
         self
     }
 
+    #[must_use]
     pub fn mime_type(mut self, val: Mime) -> Self {
         self.mime_type = val;
         self
     }
 
+    #[must_use]
     pub fn thumb_url(mut self, val: reqwest::Url) -> Self {
         self.thumb_url = val;
         self
@@ -140,6 +143,7 @@ impl InlineQueryResultVideo {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -153,16 +157,19 @@ impl InlineQueryResultVideo {
         self
     }
 
+    #[must_use]
     pub fn video_width(mut self, val: i32) -> Self {
         self.video_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn video_height(mut self, val: i32) -> Self {
         self.video_height = Some(val);
         self
     }
 
+    #[must_use]
     pub fn video_duration(mut self, val: i32) -> Self {
         self.video_duration = Some(val);
         self
@@ -176,11 +183,13 @@ impl InlineQueryResultVideo {
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/inline_query_result_voice.rs

@@ -76,6 +76,7 @@ impl InlineQueryResultVoice {
         self
     }
 
+    #[must_use]
     pub fn voice_url(mut self, val: reqwest::Url) -> Self {
         self.voice_url = val;
         self
@@ -97,6 +98,7 @@ impl InlineQueryResultVoice {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -110,16 +112,19 @@ impl InlineQueryResultVoice {
         self
     }
 
+    #[must_use]
     pub fn voice_duration(mut self, value: i32) -> Self {
         self.voice_duration = Some(value);
         self
     }
 
+    #[must_use]
     pub fn reply_markup(mut self, val: InlineKeyboardMarkup) -> Self {
         self.reply_markup = Some(val);
         self
     }
 
+    #[must_use]
     pub fn input_message_content(mut self, val: InputMessageContent) -> Self {
         self.input_message_content = Some(val);
         self

src/types/input_file.rs

@@ -64,6 +64,7 @@ impl InputFile {
     /// [`SendAudio`]: crate::payloads::SendAudio
     /// [`SendDocument`]: crate::payloads::SendDocument
     /// [`SendVoice`]: crate::payloads::SendVoice
+    #[must_use]
     pub fn url(url: url::Url) -> Self {
         Self::new(Url(url))
     }

src/types/input_message_content.rs

@@ -61,6 +61,7 @@ impl InputMessageContentText {
         self
     }
 
+    #[must_use]
     pub fn parse_mode(mut self, val: ParseMode) -> Self {
         self.parse_mode = Some(val);
         self
@@ -74,6 +75,7 @@ impl InputMessageContentText {
         self
     }
 
+    #[must_use]
     pub fn disable_web_page_preview(mut self, val: bool) -> Self {
         self.disable_web_page_preview = Some(val);
         self
@@ -109,6 +111,7 @@ pub struct InputMessageContentLocation {
 }
 
 impl InputMessageContentLocation {
+    #[must_use]
     pub const fn new(latitude: f64, longitude: f64) -> Self {
         Self {
             latitude,
@@ -120,16 +123,19 @@ impl InputMessageContentLocation {
         }
     }
 
+    #[must_use]
     pub const fn latitude(mut self, val: f64) -> Self {
         self.latitude = val;
         self
     }
 
+    #[must_use]
     pub const fn longitude(mut self, val: f64) -> Self {
         self.longitude = val;
         self
     }
 
+    #[must_use]
     pub const fn live_period(mut self, val: u32) -> Self {
         self.live_period = Some(val);
         self
@@ -188,11 +194,13 @@ impl InputMessageContentVenue {
         }
     }
 
+    #[must_use]
     pub fn latitude(mut self, val: f64) -> Self {
         self.latitude = val;
         self
     }
 
+    #[must_use]
     pub fn longitude(mut self, val: f64) -> Self {
         self.longitude = val;
         self
@@ -465,6 +473,7 @@ impl InputMessageContentInvoice {
         self
     }
 
+    #[must_use]
     pub fn currency(mut self, val: Currency) -> Self {
         self.currency = val;
         self
@@ -478,6 +487,7 @@ impl InputMessageContentInvoice {
         self
     }
 
+    #[must_use]
     pub fn max_tip_amount(mut self, val: u32) -> Self {
         self.max_tip_amount = Some(val);
         self
@@ -499,57 +509,68 @@ impl InputMessageContentInvoice {
         self
     }
 
+    #[must_use]
     pub fn photo_url(mut self, val: Url) -> Self {
         self.photo_url = Some(val);
         self
     }
 
+    #[must_use]
     pub fn photo_size(mut self, val: u32) -> Self {
         self.photo_size = Some(val);
         self
     }
 
+    #[must_use]
     pub fn photo_width(mut self, val: u32) -> Self {
         self.photo_width = Some(val);
         self
     }
 
+    #[must_use]
     pub fn photo_height(mut self, val: u32) -> Self {
         self.photo_height = Some(val);
         self
     }
 
+    #[must_use]
     pub fn need_name(mut self, val: bool) -> Self {
         self.need_name = Some(val);
         self
     }
 
+    #[must_use]
     pub fn need_phone_number(mut self, val: bool) -> Self {
         self.need_phone_number = Some(val);
         self
     }
 
+    #[must_use]
     pub fn need_email(mut self, val: bool) -> Self {
         self.need_email = Some(val);
         self
     }
 
+    #[must_use]
     pub fn need_shipping_address(mut self, val: bool) -> Self {
         self.need_shipping_address = Some(val);
         self
     }
 
+    #[must_use]
     pub fn send_phone_number_to_provider(mut self, val: bool) -> Self {
         self.send_phone_number_to_provider = Some(val);
         self
     }
 
+    #[must_use]
     pub fn send_email_to_provider(mut self, val: bool) -> Self {
         self.send_email_to_provider = Some(val);
         self
     }
 
     #[allow(clippy::wrong_self_convention)]
+    #[must_use]
     pub fn is_flexible(mut self, val: bool) -> Self {
         self.is_flexible = Some(val);
         self

src/types/label_price.rs

@@ -38,6 +38,7 @@ impl LabeledPrice {
         self
     }
 
+    #[must_use]
     pub fn amount(mut self, val: i32) -> Self {
         self.amount = val;
         self

src/types/login_url.rs

@@ -46,6 +46,7 @@ pub struct LoginUrl {
 }
 
 impl LoginUrl {
+    #[must_use]
     pub fn url(mut self, val: reqwest::Url) -> Self {
         self.url = val;
         self
@@ -67,6 +68,7 @@ impl LoginUrl {
         self
     }
 
+    #[must_use]
     pub fn request_write_access(mut self, val: bool) -> Self {
         self.request_write_access = Some(val);
         self

src/types/mask_position.rs

@@ -45,16 +45,19 @@ impl MaskPosition {
         self
     }
 
+    #[must_use]
     pub fn x_shift(mut self, val: f64) -> Self {
         self.x_shift = val;
         self
     }
 
+    #[must_use]
     pub fn y_shift(mut self, val: f64) -> Self {
         self.y_shift = val;
         self
     }
 
+    #[must_use]
     pub fn scale(mut self, val: f64) -> Self {
         self.scale = val;
         self

src/types/me.rs

@@ -26,6 +26,7 @@ pub struct Me {
 
 impl Me {
     /// Returns the username of the bot.
+    #[must_use]
     pub fn username(&self) -> &str {
         self.user
             .username
@@ -34,11 +35,13 @@ impl Me {
     }
 
     /// Returns a username mention of this bot.
+    #[must_use]
     pub fn mention(&self) -> String {
         format!("@{}", self.username())
     }
 
     /// Returns an URL that links to this bot in the form of `t.me/<...>`.
+    #[must_use]
     pub fn tme_url(&self) -> reqwest::Url {
         format!("https://t.me/{}", self.username()).parse().unwrap()
     }

src/types/message.rs

@@ -544,6 +544,7 @@ mod getters {
     /// [Message]: crate::types::Message
     /// [telegram docs]: https://core.telegram.org/bots/api#message
     impl Message {
+        #[must_use]
         pub fn from(&self) -> Option<&User> {
             match &self.kind {
                 Common(MessageCommon { from, .. }) => from.as_ref(),
@@ -551,6 +552,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn author_signature(&self) -> Option<&str> {
             match &self.kind {
                 Common(MessageCommon {
@@ -560,6 +562,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn sender_chat(&self) -> Option<&Chat> {
             match &self.kind {
                 Common(MessageCommon { sender_chat, .. }) => sender_chat.as_ref(),
@@ -568,22 +571,27 @@ mod getters {
         }
 
         #[deprecated(since = "0.4.2", note = "use `.chat.id` field instead")]
+        #[must_use]
         pub fn chat_id(&self) -> ChatId {
             self.chat.id
         }
 
+        #[must_use]
         pub fn forward(&self) -> Option<&Forward> {
             self.common().and_then(|m| m.forward.as_ref())
         }
 
+        #[must_use]
         pub fn forward_date(&self) -> Option<DateTime<Utc>> {
             self.forward().map(|f| f.date)
         }
 
+        #[must_use]
         pub fn forward_from(&self) -> Option<&ForwardedFrom> {
             self.forward().map(|f| &f.from)
         }
 
+        #[must_use]
         pub fn forward_from_user(&self) -> Option<&User> {
             self.forward_from().and_then(|from| match from {
                 ForwardedFrom::User(user) => Some(user),
@@ -591,6 +599,7 @@ mod getters {
             })
         }
 
+        #[must_use]
         pub fn forward_from_chat(&self) -> Option<&Chat> {
             self.forward_from().and_then(|from| match from {
                 ForwardedFrom::Chat(chat) => Some(chat),
@@ -598,6 +607,7 @@ mod getters {
             })
         }
 
+        #[must_use]
         pub fn forward_from_sender_name(&self) -> Option<&str> {
             self.forward_from().and_then(|from| match from {
                 ForwardedFrom::SenderName(sender_name) => Some(&**sender_name),
@@ -605,18 +615,22 @@ mod getters {
             })
         }
 
+        #[must_use]
         pub fn forward_from_message_id(&self) -> Option<i32> {
             self.forward().and_then(|f| f.message_id)
         }
 
+        #[must_use]
         pub fn forward_signature(&self) -> Option<&str> {
             self.forward().and_then(|f| f.signature.as_deref())
         }
 
+        #[must_use]
         pub fn reply_to_message(&self) -> Option<&Message> {
             self.common().and_then(|m| m.reply_to_message.as_deref())
         }
 
+        #[must_use]
         pub fn edit_date(&self) -> Option<&DateTime<Utc>> {
             match &self.kind {
                 Common(MessageCommon { edit_date, .. }) => edit_date.as_ref(),
@@ -624,6 +638,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn media_group_id(&self) -> Option<&str> {
             match &self.kind {
                 Common(MessageCommon {
@@ -646,6 +661,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn text(&self) -> Option<&str> {
             match &self.kind {
                 Common(MessageCommon {
@@ -668,6 +684,7 @@ mod getters {
         ///
         /// [`parse_entities`]: Message::parse_entities
         /// [`caption_entities`]: Message::caption_entities
+        #[must_use]
         pub fn entities(&self) -> Option<&[MessageEntity]> {
             match &self.kind {
                 Common(MessageCommon {
@@ -690,6 +707,7 @@ mod getters {
         ///
         /// [`parse_caption_entities`]: Message::parse_caption_entities
         /// [`entities`]: Message::entities
+        #[must_use]
         pub fn caption_entities(&self) -> Option<&[MessageEntity]> {
             match &self.kind {
                 Common(MessageCommon {
@@ -738,6 +756,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn audio(&self) -> Option<&types::Audio> {
             match &self.kind {
                 Common(MessageCommon {
@@ -748,6 +767,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn document(&self) -> Option<&types::Document> {
             match &self.kind {
                 Common(MessageCommon {
@@ -758,6 +778,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn animation(&self) -> Option<&types::Animation> {
             match &self.kind {
                 Common(MessageCommon {
@@ -768,6 +789,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn game(&self) -> Option<&types::Game> {
             match &self.kind {
                 Common(MessageCommon {
@@ -778,6 +800,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn photo(&self) -> Option<&[PhotoSize]> {
             match &self.kind {
                 Common(MessageCommon {
@@ -788,6 +811,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn sticker(&self) -> Option<&types::Sticker> {
             match &self.kind {
                 Common(MessageCommon {
@@ -798,6 +822,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn video(&self) -> Option<&types::Video> {
             match &self.kind {
                 Common(MessageCommon {
@@ -808,6 +833,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn voice(&self) -> Option<&types::Voice> {
             match &self.kind {
                 Common(MessageCommon {
@@ -818,6 +844,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn video_note(&self) -> Option<&types::VideoNote> {
             match &self.kind {
                 Common(MessageCommon {
@@ -828,6 +855,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn caption(&self) -> Option<&str> {
             match &self.kind {
                 Common(MessageCommon { media_kind, .. }) => match media_kind {
@@ -845,6 +873,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn contact(&self) -> Option<&types::Contact> {
             match &self.kind {
                 Common(MessageCommon {
@@ -855,6 +884,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn location(&self) -> Option<&types::Location> {
             match &self.kind {
                 Common(MessageCommon {
@@ -865,6 +895,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn venue(&self) -> Option<&types::Venue> {
             match &self.kind {
                 Common(MessageCommon {
@@ -875,6 +906,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn poll(&self) -> Option<&types::Poll> {
             match &self.kind {
                 Common(MessageCommon {
@@ -885,6 +917,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn new_chat_members(&self) -> Option<&[User]> {
             match &self.kind {
                 NewChatMembers(MessageNewChatMembers { new_chat_members }) => {
@@ -894,6 +927,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn left_chat_member(&self) -> Option<&User> {
             match &self.kind {
                 LeftChatMember(MessageLeftChatMember { left_chat_member }) => {
@@ -903,6 +937,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn new_chat_title(&self) -> Option<&str> {
             match &self.kind {
                 NewChatTitle(MessageNewChatTitle { new_chat_title }) => Some(new_chat_title),
@@ -910,6 +945,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn new_chat_photo(&self) -> Option<&[PhotoSize]> {
             match &self.kind {
                 NewChatPhoto(MessageNewChatPhoto { new_chat_photo }) => Some(new_chat_photo),
@@ -919,6 +955,7 @@ mod getters {
 
         // TODO: OK, `Option<True>` is weird, can we do something with it?
         //       mb smt like `is_delete_chat_photo(&self) -> bool`?
+        #[must_use]
         pub fn delete_chat_photo(&self) -> Option<True> {
             match &self.kind {
                 DeleteChatPhoto(MessageDeleteChatPhoto { delete_chat_photo }) => {
@@ -928,6 +965,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn group_chat_created(&self) -> Option<True> {
             match &self.kind {
                 GroupChatCreated(MessageGroupChatCreated { group_chat_created }) => {
@@ -937,6 +975,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn super_group_chat_created(&self) -> Option<True> {
             match &self.kind {
                 SupergroupChatCreated(MessageSupergroupChatCreated {
@@ -946,6 +985,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn channel_chat_created(&self) -> Option<True> {
             match &self.kind {
                 ChannelChatCreated(MessageChannelChatCreated {
@@ -955,6 +995,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn chat_migration(&self) -> Option<ChatMigration> {
             match &self.kind {
                 Common(MessageCommon {
@@ -965,6 +1006,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn migrate_to_chat_id(&self) -> Option<ChatId> {
             match &self.kind {
                 Common(MessageCommon {
@@ -975,6 +1017,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn migrate_from_chat_id(&self) -> Option<ChatId> {
             match &self.kind {
                 Common(MessageCommon {
@@ -985,6 +1028,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn pinned_message(&self) -> Option<&Message> {
             match &self.kind {
                 Pinned(MessagePinned { pinned }) => Some(pinned),
@@ -992,6 +1036,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn invoice(&self) -> Option<&types::Invoice> {
             match &self.kind {
                 Invoice(MessageInvoice { invoice }) => Some(invoice),
@@ -999,6 +1044,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn successful_payment(&self) -> Option<&types::SuccessfulPayment> {
             match &self.kind {
                 SuccessfulPayment(MessageSuccessfulPayment { successful_payment }) => {
@@ -1008,6 +1054,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn connected_website(&self) -> Option<&str> {
             match &self.kind {
                 ConnectedWebsite(MessageConnectedWebsite { connected_website }) => {
@@ -1017,6 +1064,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn passport_data(&self) -> Option<&types::PassportData> {
             match &self.kind {
                 PassportData(MessagePassportData { passport_data }) => Some(passport_data),
@@ -1024,6 +1072,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn dice(&self) -> Option<&types::Dice> {
             match &self.kind {
                 Dice(MessageDice { dice }) => Some(dice),
@@ -1031,6 +1080,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn proximity_alert_triggered(&self) -> Option<&types::ProximityAlertTriggered> {
             match &self.kind {
                 ProximityAlertTriggered(MessageProximityAlertTriggered {
@@ -1040,6 +1090,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn reply_markup(&self) -> Option<&types::InlineKeyboardMarkup> {
             match &self.kind {
                 Common(MessageCommon { reply_markup, .. }) => reply_markup.as_ref(),
@@ -1047,6 +1098,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn is_automatic_forward(&self) -> bool {
             match &self.kind {
                 Common(MessageCommon {
@@ -1057,6 +1109,7 @@ mod getters {
             }
         }
 
+        #[must_use]
         pub fn has_protected_content(&self) -> bool {
             match &self.kind {
                 Common(MessageCommon {
@@ -1085,6 +1138,7 @@ impl Message {
     ///
     /// Returns `None` for private chats (i.e.: DMs) and private groups (not
     /// supergroups).
+    #[must_use]
     pub fn url(&self) -> Option<Url> {
         Self::url_of(self.chat.id, self.chat.username(), self.id)
     }
@@ -1103,6 +1157,7 @@ impl Message {
     ///
     /// [`url`]: Message::url
     #[track_caller]
+    #[must_use]
     pub fn url_of(chat_id: ChatId, chat_username: Option<&str>, message_id: i32) -> Option<Url> {
         use BareChatId::*;
 
@@ -1146,6 +1201,7 @@ impl Message {
     ///
     /// Returns `None` for private chats (i.e.: DMs) and private groups (not
     /// supergroups).
+    #[must_use]
     pub fn comment_url(&self, comment_id: i32) -> Option<Url> {
         Self::comment_url_of(self.chat.id, self.chat.username(), self.id, comment_id)
     }
@@ -1164,6 +1220,7 @@ impl Message {
     /// supergroups).
     ///
     /// [`comment_url`]: Message::comment_url
+    #[must_use]
     pub fn comment_url_of(
         channel_id: ChatId,
         channel_username: Option<&str>,
@@ -1187,6 +1244,7 @@ impl Message {
     ///
     /// Returns `None` for private chats (i.e.: DMs) and private groups (not
     /// supergroups).
+    #[must_use]
     pub fn url_in_thread(&self, thread_starter_msg_id: i32) -> Option<Url> {
         Self::url_in_thread_of(
             self.chat.id,
@@ -1214,6 +1272,7 @@ impl Message {
     /// supergroups).
     ///
     /// [`url_in_thread`]: Message::url_in_thread
+    #[must_use]
     pub fn url_in_thread_of(
         chat_id: ChatId,
         chat_username: Option<&str>,
@@ -1235,6 +1294,7 @@ impl Message {
     /// See also: [`parse_caption_entities`].
     ///
     /// [`parse_caption_entities`]: Message::parse_caption_entities
+    #[must_use]
     pub fn parse_entities(&self) -> Option<Vec<MessageEntityRef<'_>>> {
         self.text()
             .zip(self.entities())
@@ -1249,6 +1309,7 @@ impl Message {
     /// See also: [`parse_entities`].
     ///
     /// [`parse_entities`]: Message::parse_entities
+    #[must_use]
     pub fn parse_caption_entities(&self) -> Option<Vec<MessageEntityRef<'_>>> {
         self.caption()
             .zip(self.caption_entities())

src/types/message_entity.rs

@@ -43,6 +43,7 @@ pub struct MessageEntityRef<'a> {
 }
 
 impl MessageEntity {
+    #[must_use]
     pub const fn new(kind: MessageEntityKind, offset: usize, length: usize) -> Self {
         Self {
             kind,
@@ -52,6 +53,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a bold text.
+    #[must_use]
     pub const fn bold(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Bold,
@@ -61,6 +63,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing an italic text.
+    #[must_use]
     pub const fn italic(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Italic,
@@ -70,6 +73,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing an underline text.
+    #[must_use]
     pub const fn underline(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Underline,
@@ -79,6 +83,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a strikethrough text.
+    #[must_use]
     pub const fn strikethrough(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Strikethrough,
@@ -88,6 +93,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a spoiler text.
+    #[must_use]
     pub const fn spoiler(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Spoiler,
@@ -97,6 +103,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a monowidth text.
+    #[must_use]
     pub const fn code(offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Code,
@@ -106,6 +113,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a monowidth block.
+    #[must_use]
     pub const fn pre(language: Option<String>, offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::Pre { language },
@@ -115,6 +123,7 @@ impl MessageEntity {
     }
 
     /// Create a message entity representing a clickable text URL.
+    #[must_use]
     pub const fn text_link(url: reqwest::Url, offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::TextLink { url },
@@ -129,6 +138,7 @@ impl MessageEntity {
     ///
     /// If you don't have a complete [`User`] value, please use
     /// [`MessageEntity::text_mention_id`] instead.
+    #[must_use]
     pub fn text_mention(user: User, offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::TextMention { user },
@@ -139,6 +149,7 @@ impl MessageEntity {
 
     /// Create a message entity representing a text link in the form of
     /// `tg://user/?id=...` that mentions user with `user_id`.
+    #[must_use]
     pub fn text_mention_id(user_id: UserId, offset: usize, length: usize) -> Self {
         Self {
             kind: MessageEntityKind::TextLink { url: user_id.url() },
@@ -147,16 +158,19 @@ impl MessageEntity {
         }
     }
 
+    #[must_use]
     pub fn kind(mut self, val: MessageEntityKind) -> Self {
         self.kind = val;
         self
     }
 
+    #[must_use]
     pub const fn offset(mut self, val: usize) -> Self {
         self.offset = val;
         self
     }
 
+    #[must_use]
     pub const fn length(mut self, val: usize) -> Self {
         self.length = val;
         self
@@ -165,11 +179,13 @@ impl MessageEntity {
 
 impl<'a> MessageEntityRef<'a> {
     /// Returns kind of this entity.
+    #[must_use]
     pub fn kind(&self) -> &'a MessageEntityKind {
         self.kind
     }
 
     /// Returns the text that this entity is related to.
+    #[must_use]
     pub fn text(&self) -> &'a str {
         &self.message[self.range.clone()]
     }
@@ -178,34 +194,40 @@ impl<'a> MessageEntityRef<'a> {
     ///
     /// The range is in bytes for UTF-8 encoding i.e. you can use it with common
     /// Rust strings.
+    #[must_use]
     pub fn range(&self) -> Range<usize> {
         self.range.clone()
     }
 
     /// Returns the offset (in bytes, for UTF-8) to the start of this entity in
     /// the original message.
+    #[must_use]
     pub fn start(&self) -> usize {
         self.range.start
     }
 
     /// Returns the offset (in bytes, for UTF-8) to the end of this entity in
     /// the original message.
+    #[must_use]
     pub fn end(&self) -> usize {
         self.range.end
     }
 
     /// Returns the length of this entity in bytes for UTF-8 encoding.
     #[allow(clippy::len_without_is_empty)]
+    #[must_use]
     pub fn len(&self) -> usize {
         self.range.len()
     }
 
     /// Returns the full text of the original message.
+    #[must_use]
     pub fn message_text(&self) -> &'a str {
         self.message
     }
 
     /// Parses telegram [`MessageEntity`]s converting offsets to UTF-8.
+    #[must_use]
     pub fn parse(text: &'a str, entities: &'a [MessageEntity]) -> Vec<Self> {
         // This creates entities with **wrong** offsets (UTF-16) that we later patch.
         let mut entities: Vec<_> = entities

src/types/passport_element_error.rs

@@ -32,6 +32,7 @@ impl PassportElementError {
         self
     }
 
+    #[must_use]
     pub fn kind(mut self, val: PassportElementErrorKind) -> Self {
         self.kind = val;
         self
@@ -104,6 +105,7 @@ impl PassportElementErrorDataField {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorDataFieldType) -> Self {
         self.r#type = val;
         self
@@ -153,6 +155,7 @@ impl PassportElementErrorFrontSide {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorFrontSideType) -> Self {
         self.r#type = val;
         self
@@ -194,6 +197,7 @@ impl PassportElementErrorReverseSide {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorReverseSideType) -> Self {
         self.r#type = val;
         self
@@ -233,6 +237,7 @@ impl PassportElementErrorSelfie {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorSelfieType) -> Self {
         self.r#type = val;
         self
@@ -273,6 +278,7 @@ impl PassportElementErrorFile {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorFileType) -> Self {
         self.r#type = val;
         self
@@ -313,6 +319,7 @@ impl PassportElementErrorFiles {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorFilesType) -> Self {
         self.r#type = val;
         self
@@ -354,6 +361,7 @@ impl PassportElementErrorTranslationFile {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorTranslationFileType) -> Self {
         self.r#type = val;
         self
@@ -394,6 +402,7 @@ impl PassportElementErrorTranslationFiles {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorTranslationFilesType) -> Self {
         self.r#type = val;
         self
@@ -434,6 +443,7 @@ impl PassportElementErrorUnspecified {
         }
     }
 
+    #[must_use]
     pub fn r#type(mut self, val: PassportElementErrorUnspecifiedType) -> Self {
         self.r#type = val;
         self

src/types/reply_keyboard_markup.rs

@@ -75,6 +75,7 @@ impl KeyboardMarkup {
         self
     }
 
+    #[must_use]
     pub fn append_to_row(mut self, index: usize, button: KeyboardButton) -> Self {
         match self.keyboard.get_mut(index) {
             Some(buttons) => buttons.push(button),

src/types/reply_keyboard_remove.rs

@@ -38,6 +38,7 @@ pub struct KeyboardRemove {
 }
 
 impl KeyboardRemove {
+    #[must_use]
     pub const fn new() -> Self {
         Self {
             remove_keyboard: True,
@@ -45,6 +46,7 @@ impl KeyboardRemove {
         }
     }
 
+    #[must_use]
     pub const fn selective(mut self, val: bool) -> Self {
         self.selective = Some(val);
         self

src/types/reply_markup.rs

@@ -50,6 +50,7 @@ impl ReplyMarkup {
     /// `ReplyMarkup::KeyboardRemove(ReplyKeyboardRemove::new()))`.
     ///
     /// [`KeyboardRemove`]: ReplyMarkup::KeyboardRemove
+    #[must_use]
     pub fn kb_remove() -> Self {
         Self::KeyboardRemove(KeyboardRemove::new())
     }
@@ -59,6 +60,7 @@ impl ReplyMarkup {
     /// This is a shortcut to `ReplyMarkup::ForceReply(ForceReply::new())`.
     ///
     /// [`ForceReply`]: ReplyMarkup::KeyboardRemove
+    #[must_use]
     pub fn force_reply() -> Self {
         Self::ForceReply(ForceReply::new())
     }

src/types/sticker.rs

@@ -84,6 +84,7 @@ impl Deref for Sticker {
 
 impl StickerKind {
     /// Returns `true` is this is a "normal" raster sticker.
+    #[must_use]
     pub fn is_webp(&self) -> bool {
         matches!(self, Self::Webp)
     }
@@ -91,6 +92,7 @@ impl StickerKind {
     /// Returns `true` is this is an [animated] sticker.
     ///
     /// [animated]: https://telegram.org/blog/animated-stickers
+    #[must_use]
     pub fn is_animated(&self) -> bool {
         matches!(self, Self::Animated)
     }
@@ -98,6 +100,7 @@ impl StickerKind {
     /// Returns `true` is this is a [video] sticker.
     ///
     /// [video]: https://telegram.org/blog/video-stickers-better-reactions
+    #[must_use]
     pub fn is_video(&self) -> bool {
         matches!(self, Self::Video)
     }

src/types/update.rs

@@ -29,6 +29,7 @@ pub struct Update {
 }
 
 impl Update {
+    #[must_use]
     pub fn user(&self) -> Option<&User> {
         match &self.kind {
             UpdateKind::Message(m) => m.from(),
@@ -43,6 +44,7 @@ impl Update {
         }
     }
 
+    #[must_use]
     pub fn chat(&self) -> Option<&Chat> {
         match &self.kind {
             UpdateKind::Message(m) => Some(&m.chat),

src/types/user.rs

@@ -40,27 +40,31 @@ pub struct User {
 impl User {
     /// Returns full name of this user, ie first and last names joined with a
     /// space.
+    #[must_use]
     pub fn full_name(&self) -> String {
         match &self.last_name {
-            Some(last_name) => (format!("{0} {1}", self.first_name, last_name)),
+            Some(last_name) => format!("{0} {1}", self.first_name, last_name),
             None => self.first_name.clone(),
         }
     }
 
     /// Returns a username mention of this user. Returns `None` if
     /// `self.username.is_none()`.
+    #[must_use]
     pub fn mention(&self) -> Option<String> {
         Some(format!("@{}", self.username.as_ref()?))
     }
 
     /// Returns an URL that links to this user in the form of
     /// `tg://user/?id=<...>`.
+    #[must_use]
     pub fn url(&self) -> reqwest::Url {
         self.id.url()
     }
 
     /// Returns an URL that links to this user in the form of `t.me/<...>`.
     /// Returns `None` if `self.username.is_none()`.
+    #[must_use]
     pub fn tme_url(&self) -> Option<reqwest::Url> {
         Some(
             format!("https://t.me/{}", self.username.as_ref()?)
@@ -71,12 +75,14 @@ impl User {
 
     /// Returns an URL that links to this user in the form of `t.me/<...>` or
     /// `tg://user/?id=<...>`, preferring `t.me` one when possible.
+    #[must_use]
     pub fn preferably_tme_url(&self) -> reqwest::Url {
         self.tme_url().unwrap_or_else(|| self.url())
     }
 
     /// Returns `true` if this is the special user used by telegram bot API to
     /// denote an anonymous user that sends messages on behalf of a group.
+    #[must_use]
     pub fn is_anonymous(&self) -> bool {
         // Sanity check
         debug_assert!(
@@ -92,6 +98,7 @@ impl User {
 
     /// Returns `true` if this is the special user used by telegram bot API to
     /// denote an anonymous user that sends messages on behalf of a channel.
+    #[must_use]
     pub fn is_channel(&self) -> bool {
         // Sanity check
         debug_assert!(
@@ -110,6 +117,7 @@ impl User {
     /// It is sometimes also used as a fallback, for example when a channel post
     /// is automatically forwarded to a group, bots in a group will get a
     /// message where `from` is the Telegram user.
+    #[must_use]
     pub fn is_telegram(&self) -> bool {
         // Sanity check
         debug_assert!(

src/types/user_id.rs

@@ -11,6 +11,7 @@ pub struct UserId(pub u64);
 impl UserId {
     /// Returns an URL that links to the user with this id in the form of
     /// `tg://user/?id=<...>`.
+    #[must_use]
     pub fn url(self) -> reqwest::Url {
         reqwest::Url::parse(&format!("tg://user/?id={}", self)).unwrap()
     }
@@ -18,6 +19,7 @@ impl UserId {
     /// Returns `true` if this is the id of the special user used by telegram
     /// bot API to denote an anonymous user that sends messages on behalf of
     /// a group.
+    #[must_use]
     pub fn is_anonymous(self) -> bool {
         // https://github.com/tdlib/td/blob/4791fb6a2af0257f6cad8396e10424a79ee5f768/td/telegram/ContactsManager.cpp#L4941-L4943
         const ANON_ID: UserId = UserId(1087968824);
@@ -28,6 +30,7 @@ impl UserId {
     /// Returns `true` if this is the id of the special user used by telegram
     /// bot API to denote an anonymous user that sends messages on behalf of
     /// a channel.
+    #[must_use]
     pub fn is_channel(self) -> bool {
         // https://github.com/tdlib/td/blob/4791fb6a2af0257f6cad8396e10424a79ee5f768/td/telegram/ContactsManager.cpp#L4945-L4947
         const ANON_CHANNEL_ID: UserId = UserId(136817688);
@@ -41,6 +44,7 @@ impl UserId {
     /// It is sometimes also used as a fallback, for example when a channel post
     /// is automatically forwarded to a group, bots in a group will get a
     /// message where `from` is the Telegram user.
+    #[must_use]
     pub fn is_telegram(self) -> bool {
         const TELEGRAM_USER_ID: UserId = UserId(777000);