### Rust: Handling File Metadata with `and_then` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Shows how to use `and_then` to chain operations involving file system metadata. This example attempts to get metadata for the root directory and handles potential `IO` errors. It illustrates handling `Result` types returned by file system operations, checking for success or specific error kinds. ```rust use std::{io::ErrorKind, path::Path}; // Note: on Windows "/" maps to "C:\\" let root_modified_time = Path::new("/").metadata().and_then(|md| md.modified()); assert!(root_modified_time.is_ok()); let should_fail = Path::new("/bad/path").metadata().and_then(|md| md.modified()); assert!(should_fail.is_err()); assert_eq!(should_fail.unwrap_err().kind(), ErrorKind::NotFound); ``` -------------------------------- ### Rust: Transposing Result, E> Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type This example shows the `transpose` method, which converts a `Result` containing an `Option` into an `Option` containing a `Result`. `Ok(None)` becomes `None`, while `Ok(Some(_))` and `Err(_)` are wrapped in `Some`. ```rust #[derive(Debug, Eq, PartialEq)] struct SomeErr; let x: Result, SomeErr> = Ok(Some(5)); let y: Option> = Some(Ok(5)); assert_eq!(x.transpose(), y); ``` -------------------------------- ### Rust: Get reference to Result value Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Shows the `as_ref` method for Rust's Result type. This method converts a reference to a Result (`&Result`) into a Result of references (`Result<&T, &E>`), leaving the original Result unchanged. Examples include both Ok and Err variants. ```rust let x: Result = Ok(2); assert_eq!(x.as_ref(), Ok(&2)); let x: Result = Err("Error"); assert_eq!(x.as_ref(), Err(&"Error")); ``` -------------------------------- ### Rust: Convert Result to Option (Ok value) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Illustrates the `ok` method for Rust's Result type. This method consumes the Result and returns an Option containing the success value if it's an Ok variant, otherwise it returns None. Examples show both Ok and Err cases. ```rust let x: Result = Ok(2); assert_eq!(x.ok(), Some(2)); let x: Result = Err("Nothing here"); assert_eq!(x.ok(), None); ``` -------------------------------- ### Rust: Copying and Cloning Result References Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type These examples demonstrate how to create owned values from references within a `Result`. The `copied` method is used for types that implement `Copy`, while `cloned` is used for types that implement `Clone`. Both methods map a `Result<&T, E>` to a `Result`. ```rust let val = 12; let x: Result<&i32, i32> = Ok(&val); assert_eq!(x, Ok(&12)); let copied = x.copied(); assert_eq!(copied, Ok(12)); ``` ```rust let val = 12; let x: Result<&i32, i32> = Ok(&val); assert_eq!(x, Ok(&12)); let cloned = x.cloned(); assert_eq!(cloned, Ok(12)); ``` ```rust let mut val = 12; let x: Result<&mut i32, i32> = Ok(&mut val); assert_eq!(x, Ok(&mut 12)); let copied = x.copied(); assert_eq!(copied, Ok(12)); ``` ```rust let mut val = 12; let x: Result<&mut i32, i32> = Ok(&mut val); assert_eq!(x, Ok(&mut 12)); let cloned = x.cloned(); assert_eq!(cloned, Ok(12)); ``` -------------------------------- ### Tauri Remote Push Commands (Rust) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/src/tauri_plugin_remote_push/commands This snippet demonstrates how to define asynchronous commands for a Tauri application to interact with the remote push plugin. It includes functions to get a push token and request user permission for notifications. These commands require the `tauri` crate and the `RemotePushExt` trait. ```Rust use tauri::{command, AppHandle, Runtime}; use crate::{RemotePushExt, Result}; #[command] pub(crate) async fn get_token(app: AppHandle) -> Result { app.remote_push().get_token() } #[command] pub(crate) fn request_permission(app: AppHandle) -> Result<()> { app.remote_push().request_permission() } ``` -------------------------------- ### Rust: Safely Get Ok Value (Nightly) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Introduces the `into_ok` method, an experimental nightly-only API for Rust's `Result`. This method retrieves the `Ok` value without panicking. It's designed as a compile-time safeguard, ensuring that the code will not compile if the `Result`'s error type can actually occur, thus promoting safer error handling practices. ```rust fn only_good_news() -> Result { Ok("this is fine".into()) } let s: String = only_good_news().into_ok(); println!("{s}"); ``` -------------------------------- ### Rust: Using a Default Value with `unwrap_or` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Shows how to use `unwrap_or` to get the `Ok` value from a `Result` or return a provided default value if the `Result` is `Err`. The default value is eagerly evaluated. ```rust let default = 2; let x: Result = Ok(9); assert_eq!(x.unwrap_or(default), 9); let x: Result = Err("error"); assert_eq!(x.unwrap_or(default), default); ``` -------------------------------- ### Rust: Map Ok value in Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Details the `map` method for Rust's Result type. This method applies a function to the value inside an Ok variant, transforming it while leaving Err variants untouched. The example iterates through lines of text, parsing numbers and doubling them if successful. ```rust let line = "1\n2\n3\n4\n"; for num in line.lines() { match num.parse::().map(|i| i * 2) { Ok(n) => println!("{n}"), Err(..) => {} } } ``` -------------------------------- ### Rust: Map Ok value to U or default for Err Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Introduces the experimental `map_or_default` method for Rust's Result type. This nightly-only feature maps the Ok value using a function or returns the default value of type U if the Result is an Err. Examples show usage with both Ok and Err. ```rust #![feature(result_option_map_or_default)] let x: Result<_, &str> = Ok("foo"); let y: Result<&str, _> = Err("bar"); assert_eq!(x.map_or_default(|x| x.len()), 3); assert_eq!(y.map_or_default(|y| y.len()), 0); ``` -------------------------------- ### Rust: Get mutable reference to Result value Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Explains the `as_mut` method for Rust's Result type. This method converts a mutable reference to a Result (`&mut Result`) into a Result of mutable references (`Result<&mut T, &mut E>`), allowing in-place modification. Examples demonstrate mutation for both Ok and Err variants. ```rust fn mutate(r: &mut Result) { match r.as_mut() { Ok(v) => *v = 42, Err(e) => *e = 0, } } let mut x: Result = Ok(2); mutate(&mut x); assert_eq!(x.unwrap(), 42); let mut x: Result = Err(13); mutate(&mut x); assert_eq!(x.unwrap_err(), 0); ``` -------------------------------- ### Rust: Unsafe Unwrapping of `Ok` Value Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Provides an example of `unwrap_unchecked`, an unsafe method that returns the contained `Ok` value without checking if the `Result` is `Err`. Calling this on an `Err` results in undefined behavior. This should only be used when the `Ok` state is guaranteed. ```rust let x: Result = Ok(2); assert_eq!(unsafe { x.unwrap_unchecked() }, 2); ``` ```rust let x: Result = Err("emergency failure"); unsafe { x.unwrap_unchecked() }; // Undefined behavior! ``` -------------------------------- ### Rust: Map Result to value using fallback or mapping function Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Details the `map_or_else` method for Rust's Result type. This method applies a fallback function to the Err value or a mapping function to the Ok value, returning the result. The example demonstrates behavior for both Ok and Err variants. ```rust let k = 21; let x : Result<_, &str> = Ok("foo"); assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 3); let x : Result<&str, _> = Err("bar"); assert_eq!(x.map_or_else(|e| k * 2, |v| v.len()), 42); ``` -------------------------------- ### Rust: Convert Result to Option (Err value) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates the `err` method for Rust's Result type. This method consumes the Result and returns an Option containing the error value if it's an Err variant, otherwise it returns None. Examples cover both Ok and Err scenarios. ```rust let x: Result = Ok(2); assert_eq!(x.err(), None); let x: Result = Err("Nothing here"); assert_eq!(x.err(), Some("Nothing here")); ``` -------------------------------- ### Rust: Map Result to value or default Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Explains the `map_or` method for Rust's Result type. This method returns the result of applying a function to the Ok value, or a provided default value if the Result is an Err. The example shows different outcomes based on whether the Result is Ok or Err. ```rust let x: Result<_, &str> = Ok("foo"); assert_eq!(x.map_or(42, |v| v.len()), 3); let x: Result<&str, _> = Err("bar"); assert_eq!(x.map_or(42, |v| v.len()), 42); ``` -------------------------------- ### Rust: Safely Get Err Value (Nightly) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Presents the `into_err` method, an experimental nightly-only API for Rust's `Result`. This method extracts the `Err` value without panicking. Similar to `into_ok`, it acts as a compile-time check, failing compilation if the `Ok` type can genuinely occur, thereby enhancing code safety. ```rust fn only_bad_news() -> Result { Err("Oops, it failed".into()) } let error: String = only_bad_news().into_err(); println!("{error}"); ``` -------------------------------- ### Initialize tauri-plugin-remote-push Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/src/tauri_plugin_remote_push/lib Initializes the tauri-plugin-remote-push plugin. It sets up the invoke handler for commands like 'get_token' and 'request_permission', and manages the plugin's state. This function is conditional based on the target platform (desktop or mobile). ```rust use tauri::{ plugin::{Builder, TauriPlugin}, Manager, Runtime, }; pub use models::*; #[cfg(desktop)] mod desktop; #[cfg(mobile)] mod mobile; mod commands; mod error; mod models; pub use error::{Error, Result}; #[cfg(desktop)] use desktop::RemotePush; #[cfg(mobile)] use mobile::RemotePush; /// Extensions to [`tauri::App`], [`tauri::AppHandle`] and [`tauri::Window`] to access the remote-push APIs. pub trait RemotePushExt { fn remote_push(&self) -> &RemotePush; } impl> crate::RemotePushExt for T { fn remote_push(&self) -> &RemotePush { self.state::>().inner() } } /// Initializes the plugin. pub fn init() -> TauriPlugin> { Builder::>::new("remote-push") .invoke_handler(tauri::generate_handler![ commands::get_token, commands::request_permission ]) .setup(|app, api| { let config = api.config().clone(); #[cfg(mobile)] let remote_push = mobile::init(app, api, config)?; #[cfg(desktop)] let remote_push = desktop::init(app, api, config)?; app.manage(remote_push); Ok(()) }) .build() } ``` -------------------------------- ### Initialize RemotePush Plugin in Rust Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/src/tauri_plugin_remote_push/desktop This Rust code initializes the tauri-plugin-remote-push, providing access to its APIs. It requires a generic Runtime, a DeserializeOwned type for configuration, and an AppHandle. It returns a RemotePush struct which wraps the AppHandle. ```rust use serde::de::DeserializeOwned; use tauri::{plugin::PluginApi, AppHandle, Runtime}; use crate::models::*; pub fn init( app: &AppHandle, _api: PluginApi, _config: Option, ) -> crate::Result> { Ok(RemotePush(app.clone())) } /// Access to the remote-push APIs. pub struct RemotePush(AppHandle); impl RemotePush { pub fn get_token(&self) -> crate::Result { Ok("".to_string()) } pub fn request_permission(&self) -> crate::Result<()> { Ok(()) } } ``` -------------------------------- ### Rust: Providing Alternative `Ok` Values with `or` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Illustrates the `or` method for `Result`. If the initial `Result` is `Ok`, its value is returned. If it's `Err`, the `Result` provided as an argument to `or` is returned. Note that arguments to `or` are eagerly evaluated. ```rust let x: Result = Ok(2); let y: Result = Err("late error"); assert_eq!(x.or(y), Ok(2)); let x: Result = Err("early error"); let y: Result = Ok(2); assert_eq!(x.or(y), Ok(2)); let x: Result = Err("not a 2"); let y: Result = Err("late error"); assert_eq!(x.or(y), Err("late error")); let x: Result = Ok(2); let y: Result = Ok(100); assert_eq!(x.or(y), Ok(2)); ``` -------------------------------- ### Define Configuration and Permission State Models (Rust) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/src/tauri_plugin_remote_push/models Defines the data structures for the remote push plugin configuration and permission state. These structures are used to serialize and deserialize data, with `Config` handling sender ID and `PermissionState` indicating permission grants. They rely on the `serde` crate for serialization. ```rust use serde::{Deserialize, Serialize}; #[derive(Debug, Clone, serde::Deserialize)] pub struct Config { #[serde(rename = "senderId")] pub sender_id: Option, } #[derive(Debug, Clone, Default, Deserialize, Serialize)] #[serde(rename_all = "camelCase")] pub struct PermissionState { pub granted: bool, } ``` -------------------------------- ### Trait Implementations Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type This section details the trait implementations available for the Result type. ```APIDOC ## `impl Clone for Result` ### Description Provides cloning functionality for `Result` if both `T` and `E` implement `Clone`. ### Methods #### `fn clone(&self) -> Result` Returns a duplicate of the value. #### `fn clone_from(&mut self, source: &Result)` Performs copy-assignment from `source`. ## `impl Context for Result` ### Description Provides methods for adding context to errors in a `Result`. ### Methods #### `fn context(self, context: C) -> Result` Wraps the error value with additional context. #### `fn with_context(self, context: F) -> Result` Wraps the error value with additional context that is evaluated lazily only once an error does occur. ## `impl Debug for Result` ### Description Provides `Debug` formatting for `Result` if both `T` and `E` implement `Debug`. ``` -------------------------------- ### Rust: Implementing Try for Result (Nightly) Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Experimental nightly feature that implements the Try trait for Result. This enables advanced control flow with the `?` operator, defining `Output`, `Residual`, and methods like `branch` and `from_output`. ```rust impl Try for Result { type Output = T; type Residual = Result; fn from_output(output: Self::Output) -> Self { Ok(output) } fn branch(self) -> ControlFlow { match self { Ok(v) => ControlFlow::Continue(v), Err(e) => ControlFlow::Break(Err(e)), } } } ``` -------------------------------- ### Rust: Implementing PartialEq for Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Provides `eq` and `ne` methods for comparing two Result types for equality. It requires that both the success type `T` and the error type `E` implement PartialEq. ```rust impl where T: PartialEq, E: PartialEq, PartialEq for Result { fn eq(&self, other: &Result) -> bool { match (self, other) { (Ok(a), Ok(b)) => a == b, (Err(a), Err(b)) => a == b, _ => false, } } fn ne(&self, other: &Result) -> bool { !self.eq(other) } } ``` -------------------------------- ### Result Methods Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type This section covers common methods associated with the Result type for handling success and error scenarios. ```APIDOC ## `and_then` ### Description Chains fallible operations that may return `Err`. ### Method `and_then` ### Examples ```rust fn sq_then_to_string(x: u32) -> Result { x.checked_mul(x).map(|sq| sq.to_string()).ok_or("overflowed") } assert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string())); assert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err("overflowed")); assert_eq!(Err("not a number").and_then(sq_then_to_string), Err("not a number")); ``` ## `or` ### Description Returns `res` if the result is `Err`, otherwise returns the `Ok` value of `self`. Arguments passed to `or` are eagerly evaluated. ### Method `or` ### Parameters #### Request Body - **res** (Result) - The result to return if `self` is an `Err`. ### Examples ```rust let x: Result = Ok(2); let y: Result = Err("late error"); assert_eq!(x.or(y), Ok(2)); let x: Result = Err("early error"); let y: Result = Ok(2); assert_eq!(x.or(y), Ok(2)); ``` ## `or_else` ### Description Calls `op` if the result is `Err`, otherwise returns the `Ok` value of `self`. This function can be used for control flow based on result values. ### Method `or_else` ### Parameters #### Request Body - **op** (FnOnce(E) -> Result) - A closure that is called if `self` is an `Err`. ### Examples ```rust fn sq(x: u32) -> Result { Ok(x * x) } fn err(x: u32) -> Result { Err(x) } assert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2)); assert_eq!(Err(3).or_else(sq).or_else(err), Ok(9)); ``` ## `unwrap_or` ### Description Returns the contained `Ok` value or a provided default. Arguments passed to `unwrap_or` are eagerly evaluated. ### Method `unwrap_or` ### Parameters #### Request Body - **default** (T) - The default value to return if `self` is an `Err`. ### Examples ```rust let default = 2; let x: Result = Ok(9); assert_eq!(x.unwrap_or(default), 9); let x: Result = Err("error"); assert_eq!(x.unwrap_or(default), default); ``` ## `unwrap_or_else` ### Description Returns the contained `Ok` value or computes it from a closure. ### Method `unwrap_or_else` ### Parameters #### Request Body - **op** (FnOnce(E) -> T) - A closure that computes the default value if `self` is an `Err`. ### Examples ```rust fn count(x: &str) -> usize { x.len() } assert_eq!(Ok(2).unwrap_or_else(count), 2); assert_eq!(Err("foo").unwrap_or_else(count), 3); ``` ## `unwrap_unchecked` ### Description Returns the contained `Ok` value, consuming the `self` value, without checking that the value is not an `Err`. ### Method `unwrap_unchecked` ### Safety Calling this method on an `Err` is _undefined behavior_. ### Examples ```rust let x: Result = Ok(2); assert_eq!(unsafe { x.unwrap_unchecked() }, 2); let x: Result = Err("emergency failure"); unsafe { x.unwrap_unchecked() }; // Undefined behavior! ``` ## `unwrap_err_unchecked` ### Description Returns the contained `Err` value, consuming the `self` value, without checking that the value is not an `Ok`. ### Method `unwrap_err_unchecked` ### Safety Calling this method on an `Ok` is _undefined behavior_. ### Examples ```rust let x: Result = Ok(2); unsafe { x.unwrap_err_unchecked() }; // Undefined behavior! let x: Result = Err("emergency failure"); assert_eq!(unsafe { x.unwrap_err_unchecked() }, "emergency failure"); ``` ``` -------------------------------- ### Rust: Combine Results with 'and' Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Explains the `and` method for Rust's `Result`. If the initial `Result` is `Ok`, `and` returns the second `Result` provided as an argument. If the initial `Result` is `Err`, it returns that `Err` value. Note that arguments to `and` are evaluated immediately, unlike `and_then`. ```rust let x: Result = Ok(2); let y: Result<&str, &str> = Err("late error"); assert_eq!(x.and(y), Err("late error")); let x: Result = Err("early error"); let y: Result<&str, &str> = Ok("foo"); assert_eq!(x.and(y), Err("early error")); let x: Result = Err("not a 2"); let y: Result<&str, &str> = Err("late error"); assert_eq!(x.and(y), Err("not a 2")); let x: Result = Ok(2); let y: Result<&str, &str> = Ok("different result type"); assert_eq!(x.and(y), Ok("different result type")); ``` -------------------------------- ### Result::as_deref_mut Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Converts from `Result` to `Result<&mut ::Target, &mut E>` by coercing the `Ok` variant via `DerefMut`. ```APIDOC ## POST /result/as_deref_mut ### Description Converts from `Result` to `Result<&mut ::Target, &mut E>` by coercing the `Ok` variant via `DerefMut`. ### Method POST ### Endpoint /result/as_deref_mut ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (string) - The value if the result is Ok. - **Err_value** (number) - The value if the result is Err. - **mutation_function** (string) - Optional - A function to apply to the mutable dereferenced Ok_value. ### Request Example ```json { "data": { "Ok_value": "hello" }, "mutation_function": "|x| { x.make_ascii_uppercase(); x }" } ``` ### Response #### Success Response (200) - **result** (object) - The converted Result. - **Ok_value** (string) - The mutated and dereferenced value if the original result was Ok. - **Err_value** (number) - The original error value if the original result was Err. #### Response Example ```json { "result": { "Ok_value": "HELLO" } } ``` ``` -------------------------------- ### Result::as_deref Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Converts from `Result` to `Result<&::Target, &E>` by coercing the `Ok` variant via `Deref`. ```APIDOC ## POST /result/as_deref ### Description Converts from `Result` to `Result<&::Target, &E>` by coercing the `Ok` variant via `Deref`. ### Method POST ### Endpoint /result/as_deref ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (string) - The value if the result is Ok. - **Err_value** (number) - The value if the result is Err. ### Request Example ```json { "data": { "Ok_value": "hello" } } ``` ### Response #### Success Response (200) - **result** (object) - The converted Result. - **Ok_value** (string) - The dereferenced value if the original result was Ok. - **Err_value** (number) - The original error value if the original result was Err. #### Response Example ```json { "result": { "Ok_value": "hello" } } ``` ``` -------------------------------- ### Result::unwrap Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Returns the contained `Ok` value, consuming the `self` value. Panics if the value is an `Err`. ```APIDOC ## POST /result/unwrap ### Description Returns the contained `Ok` value, consuming the `self` value. Panics if the value is an `Err`. ### Method POST ### Endpoint /result/unwrap ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (any) - The value if the result is Ok. - **Err_value** (string) - The error message if the result is Err. ### Request Example ```json { "data": { "Ok_value": "some value" } } ``` ### Response #### Success Response (200) - **value** (any) - The contained `Ok` value. #### Response Example ```json { "value": "some value" } ``` #### Error Response (Panic) - **panic_message** (string) - The panic message indicating the error. #### Error Response Example ```json { "panic_message": "called `Result::unwrap()` on an `Err` value: expected error" } ``` ``` -------------------------------- ### Rust: Cloning a Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates the `Clone` trait implementation for `Result`, where both `T` and `E` must also implement `Clone`. The `clone` method creates a duplicate of the `Result` value. ```rust fn clone(&self) -> Result where T: Clone, E: Clone, ``` -------------------------------- ### Rust: Implementing PartialOrd for Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Enables partial ordering comparisons (<, <=, >, >=) for Result types. This requires that both the success type `T` and the error type `E` implement PartialOrd. ```rust impl where T: PartialOrd, E: PartialOrd, PartialOrd for Result { fn partial_cmp(&self, other: &Result) -> Option { match (self, other) { (Ok(a), Ok(b)) => a.partial_cmp(b), (Err(a), Err(b)) => a.partial_cmp(b), (Ok(_), Err(_)) => Some(Ordering::Greater), // Ok is considered greater than Err (Err(_), Ok(_)) => Some(Ordering::Less), // Err is considered less than Ok } } // Default implementations for lt, le, gt, ge using partial_cmp fn lt(&self, other: &Self) -> bool { self.partial_cmp(other) == Some(Ordering::Less) } fn le(&self, other: &Self) -> bool { self.partial_cmp(other) != Some(Ordering::Greater) } fn gt(&self, other: &Self) -> bool { self.partial_cmp(other) == Some(Ordering::Greater) } fn ge(&self, other: &Self) -> bool { self.partial_cmp(other) != Some(Ordering::Less) } } ``` -------------------------------- ### Implement RemotePushExt for Tauri Manager Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/trait Provides an implementation of the RemotePushExt trait for types that implement Tauri's Manager trait. This allows access to the remote_push method on managed Tauri applications. ```rust impl> RemotePushExt for T ``` -------------------------------- ### Rust: Calculating Product of Results Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Implements the Product trait for Result, allowing the calculation of a product from an iterator of Result types. If any element is an Err, it short-circuits and returns that Err. Otherwise, it returns the product of the Ok values. ```rust impl where T: Product, Product> for Result { fn product(iter: I) -> Result where I: Iterator> { let mut result = None; for item in iter { match item { Ok(val) => { result = match result { Some(acc) => Some(acc.checked_mul(val)?), // Assuming T has checked_mul for safety None => Some(val), }; } Err(e) => return Err(e), } } Ok(result.unwrap_or_else(T::one)) // Assuming T has a `one` method for the identity element } } ``` -------------------------------- ### Rust: Debugging a Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Shows the `Debug` trait implementation for `Result`, requiring that both `T` and `E` implement `Debug`. This allows `Result` values to be formatted for debugging purposes. ```rust impl Debug for Result where T: Debug, E: Debug, ``` -------------------------------- ### Result::expect Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Returns the contained `Ok` value, consuming the `self` value. Panics if the value is an `Err`. ```APIDOC ## POST /result/expect ### Description Returns the contained `Ok` value, consuming the `self` value. Panics if the value is an `Err`. ### Method POST ### Endpoint /result/expect ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (any) - The value if the result is Ok. - **Err_value** (string) - The error message if the result is Err. - **message** (string) - Required - The message to include in the panic if the result is Err. ### Request Example ```json { "data": { "Err_value": "emergency failure" }, "message": "Testing expect" } ``` ### Response #### Success Response (200) - **value** (any) - The contained `Ok` value. #### Response Example ```json { "value": "some ok value" } ``` #### Error Response (Panic) - **panic_message** (string) - The panic message including the provided message and the error content. #### Error Response Example ```json { "panic_message": "Testing expect: emergency failure" } ``` ``` -------------------------------- ### Rust: Checking if Result is Ok and matches predicate Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type The `is_ok_and` method checks if the `Result` is `Ok` and if the contained value satisfies a given predicate function. It returns `true` only if both conditions are met. ```rust let x: Result = Ok(2); assert_eq!(x.is_ok_and(|x| x > 1), true); let x: Result = Ok(0); assert_eq!(x.is_ok_and(|x| x > 1), false); let x: Result = Err("hey"); assert_eq!(x.is_ok_and(|x| x > 1), false); ``` ```rust let x: Result = Ok("ownership".to_string()); assert_eq!(x.as_ref().is_ok_and(|x| x.len() > 1), true); println!("still alive {:?}", x); ``` -------------------------------- ### TryWriteable Trait Methods in Rust Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type This snippet showcases methods from the `TryWriteable` trait. These methods facilitate writing data to various sinks, such as generic `Write` implementors, sinks supporting parts (annotations), or directly to a `String`. Error handling is managed through Rust's `Result` type. ```rust fn try_write_to(&self, sink: &mut W) -> Result as TryWriteable>::Error>, Error> where W: Write + ?Sized, ``` ```rust fn try_write_to_parts(&self, sink: &mut S) -> Result as TryWriteable>::Error>, Error> where S: PartsWrite + ?Sized, ``` ```rust fn try_write_to_string(&self) -> Result, ( as TryWriteable>::Error, Cow<'_, str>)> ``` ```rust fn writeable_length_hint(&self) -> LengthHint ``` -------------------------------- ### Rust: Adding Context to Errors Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Illustrates the `Context` trait for `Result`, where `E` must implement `StdError`. The `context` method wraps an error with additional displayable context. The `with_context` method provides lazily evaluated context. ```rust fn context(self, context: C) -> Result where C: Display + Send + Sync + 'static, fn with_context(self, context: F) -> Result where C: Display + Send + Sync + 'static, F: FnOnce() -> C, ``` -------------------------------- ### Implementations for Result in Rust Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type This section details various trait implementations for the standard Rust `Result` type. These include `Copy`, `Eq`, `StructuralPartialEq`, and `UseCloned`, provided that the generic types `T` and `E` also implement the respective traits. These implementations enable common operations and comparisons on `Result` values. ```rust impl Copy for Result where T: Copy, E: Copy, ``` ```rust impl Eq for Result where T: Eq, E: Eq, ``` ```rust impl StructuralPartialEq for Result ``` ```rust impl UseCloned for Result where T: UseCloned, E: UseCloned, ``` -------------------------------- ### Result::iter Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Returns an iterator over the possibly contained value. Yields one value if `Ok`, otherwise none. ```APIDOC ## POST /result/iter ### Description Returns an iterator over the possibly contained value. Yields one value if `Ok`, otherwise none. ### Method POST ### Endpoint /result/iter ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (any) - The value if the result is Ok. - **Err_value** (any) - The value if the result is Err. ### Request Example ```json { "data": { "Ok_value": 7 } } ``` ### Response #### Success Response (200) - **iterator_output** (array) - The output of the iterator. Contains the Ok_value if present, otherwise empty. #### Response Example ```json { "iterator_output": [ 7 ] } ``` ``` -------------------------------- ### Rust: Chain Operations with 'and_then' Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Describes the `and_then` method for Rust's `Result`. If the `Result` is `Ok`, it calls the provided closure `op` with the contained value and returns the `Result` produced by the closure. If the `Result` is `Err`, it returns that `Err` value directly. This method is ideal for sequential operations where each step might fail. ```rust let x: Result = Ok(2); let result = x.and_then(|v| { if v == 2 { Ok("two") } else { Err("not two") } }); assert_eq!(result, Ok("two")); let x: Result = Err("an error"); let result = x.and_then(|v| { if v == 2 { Ok("two") } else { Err("not two") } }); assert_eq!(result, Err("an error")); ``` -------------------------------- ### Rust: Checking if Result is Ok Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type The `is_ok` method returns `true` if the `Result` instance is the `Ok` variant and `false` otherwise. This is a common way to check for success without unwrapping the value. ```rust let x: Result = Ok(-3); assert_eq!(x.is_ok(), true); let x: Result = Err("Some error message"); assert_eq!(x.is_ok(), false); ``` -------------------------------- ### Result::inspect Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Calls a closure with a reference to the contained value if `Ok` and returns the original result. ```APIDOC ## POST /result/inspect ### Description Calls a closure with a reference to the contained value if `Ok` and returns the original result. ### Method POST ### Endpoint /result/inspect ### Parameters #### Request Body - **data** (object) - Required - The Result data to process. - **Ok_value** (any) - The value if the result is Ok. - **Err_value** (any) - The value if the result is Err. - **inspection_closure** (string) - Required - A closure to be called with a reference to the Ok_value. ### Request Example ```json { "data": { "Ok_value": 4 }, "inspection_closure": "|x| println!(\"original: {x}\")" } ``` ### Response #### Success Response (200) - **result** (object) - The original result. - **Ok_value** (any) - The value if the result is Ok. - **Err_value** (any) - The value if the result is Err. #### Response Example ```json { "result": { "Ok_value": 4 } } ``` ``` -------------------------------- ### Convert Result<&T, &E> in Rust Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type The `as_deref` method converts a `Result` or `&Result` into a `Result<&::Target, &E>` by coercing the `Ok` variant via `Deref`. This allows accessing the underlying data through a reference without consuming the original Result. ```rust let x: Result = Ok("hello".to_string()); let y: Result<&str, &u32> = Ok("hello"); assert_eq!(x.as_deref(), y); let x: Result = Err(42); let y: Result<&str, &u32> = Err(&42); assert_eq!(x.as_deref(), y); ``` -------------------------------- ### Rust: Unwrap Result Value or Panic Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates the `unwrap` method on Rust's `Result` type. It returns the contained `Ok` value, but panics if the value is an `Err`, using the `Err`'s value as the panic message. This is useful for cases where an `Err` is considered an unrecoverable program error. ```rust let x: Result = Ok(2); assert_eq!(x.unwrap(), 2); ``` ```rust let x: Result = Err("emergency failure"); x.unwrap(); // panics with `emergency failure` ``` -------------------------------- ### Rust: Chaining Fallible Operations with `and_then` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates chaining fallible operations that return `Result`. The `and_then` method is used to apply a function to the `Ok` value, propagating `Err` values directly. This is useful for sequential operations where any failure should stop the chain. It handles potential overflows during multiplication. ```rust fn sq_then_to_string(x: u32) -> Result { x.checked_mul(x).map(|sq| sq.to_string()).ok_or("overflowed") } assert_eq!(Ok(2).and_then(sq_then_to_string), Ok(4.to_string())); assert_eq!(Ok(1_000_000).and_then(sq_then_to_string), Err("overflowed")); assert_eq!(Err("not a number").and_then(sq_then_to_string), Err("not a number")); ``` -------------------------------- ### Rust: Collect Results into a single Result using `FromIterator` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates how to use `FromIterator` to collect an iterator of `Result` types into a single `Result`. If any element in the iterator is an `Err`, the collection stops and that `Err` is returned. Otherwise, a container with all the `Ok` values is returned. This is useful for batch operations where failure of one item should halt the entire process. ```Rust let v = vec![1, 2]; let res: Result, &'static str> = v.iter().map(|x: &u32| x.checked_add(1).ok_or("Overflow!") ).collect(); assert_eq!(res, Ok(vec![2, 3])); ``` ```Rust let v = vec![1, 2, 0]; let res: Result, &'static str> = v.iter().map(|x: &u32| x.checked_sub(1).ok_or("Underflow!") ).collect(); assert_eq!(res, Err("Underflow!")); ``` ```Rust let v = vec![3, 2, 1, 10]; let mut shared = 0; let res: Result, &'static str> = v.iter().map(|x: &u32| { shared += x; x.checked_sub(2).ok_or("Underflow!") }).collect(); assert_eq!(res, Err("Underflow!")); assert_eq!(shared, 6); ``` -------------------------------- ### Unwrap Ok Value in Rust Result Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type The `unwrap` method returns the contained `Ok` value, consuming the `self` value. If the `Result` is `Err`, it panics. This method is discouraged due to its potential to cause program termination. Prefer pattern matching or other methods like `unwrap_or`. ```rust let x: Result = Ok(2); assert_eq!(x.unwrap(), 2); ``` -------------------------------- ### Rust: Lazy Error Handling with `or_else` Source: https://docs.rs/tauri-plugin-remote-push/1.0.10/tauri_plugin_remote_push/type Demonstrates the `or_else` method for `Result`. If the initial `Result` is `Ok`, its value is returned. If it's `Err`, a closure is called with the error value, and the `Result` returned by the closure is used. This allows for lazy evaluation of the alternative error handling. ```rust fn sq(x: u32) -> Result { Ok(x * x) } fn err(x: u32) -> Result { Err(x) } assert_eq!(Ok(2).or_else(sq).or_else(sq), Ok(2)); assert_eq!(Ok(2).or_else(err).or_else(sq), Ok(2)); assert_eq!(Err(3).or_else(sq).or_else(err), Ok(9)); assert_eq!(Err(3).or_else(err).or_else(err), Err(3)); ```