Expected struct file found enum result

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WebAug 1, 2024 · This topic was automatically closed 90 days after the last reply. We invite you to open a new topic if you have further questions or comments.WebMay 23, 2024 · fn open_file_impl () -> Option { use tauri::api::dialog::Response; let result = tauri::api::dialog::select (None,None).ok ()?; if let Response::Okay (path) = …

Why does removing return give me an error: expected type `()` but found ...

WebAug 23, 2024 · I'm pretty sure the from_timestamp function is returning a DateTime struct and not a Result, so I don't know what "expected struct chrono::NaiveDateTime, found enum std::result::Result" may mean. rustWebMar 11, 2024 · The current issue in your code is that string_for_array.to_string() creates a new String, but the array_display array contains &str references.. The suggestion the compiler gives here (replacing with &string_for_array.to_string()) does not work, because the result of .to_string() will be freed at the end of the line and you would have an invalid …pinecrest ca homes for sale

Mismatched types in if let statement: found Option expected Result

WebJul 4, 2024 · I am trying to generify a Result that is returned by the reqwest::blocking::get function. It returns a Result WebApr 25, 2024 · The example from the "chaining computations" section of the Tokio docs does not compile: "expected struct `std::io::Error`, found ()" 6 tokio::select! but for a Vec of futuresWebNov 26, 2024 · The main function is defined as fn main() -> Result<(), ts::Error>, which means that it must return a value of type Result<(), ts::Error>. In the original code, this is accomplished by the last line: In the original code, this is accomplished by the last line:pinecrest cadence school calendar

How do I convert MySQL enums to Rust enums when using the mysql crate ...

expected enum `std::result::Result`, found () - Stack Overflow

WebMar 26, 2015 · The simplest is to unwrap the result, which causes a thread panic on failure cases. fn allocate (path: &str) -> File { File::create (Path::new (path)).unwrap () } You could also return a Result of your own, and then force the caller to …WebMar 23, 2015 · You have a Result because File::open (&path) can fail. Failure is represented with the Result type. A Result may be either an Ok, which is the success case, or an Err, the failure case. You need to handle the failure case somehow. The easiest is to just die on failure, using expect: let mut file = File::open (&path).expect ("Unable to open"); top potassium rich foodsWebJun 9, 2024 · In this example, the error occurs because State::Failed has a field which isn't matched. It should be State::Failed (ref msg). In my case I'm matching the field of my enum because I'm doing OperationMode::CBC (_). Why does the error happen? enums rust pattern-matching Share Improve this question Follow edited Jun 9, 2024 at 14:10 …pinecrest ca snow report

"WebJun 24, 2024 · This pattern is so common that rust's result gives a lot of utilities to make this kind of things easier. Here, the map_err function would make it more straightforward: map_err see:" - Expected struct file found enum result

Expected struct file found enum result

rust - expected opaque type, found enum `Result` - Stack Overflow

WebAug 6, 2024 · I've found on the Rocket documentation that is really easy to send JSON as a response: You just have to use the Serde library. Unfortunatly, that wasn't so simple for me... Here is my current code : # [derive (Serialize,Deserialize)] pub struct Printers { pub printers: Vec, } # [derive (Serialize,Deserialize)] pub struct Printer { pub ...WebJan 22, 2024 · The result type of this function is Result> and you return Err (Error)). Just put a box around your errors, e.g. Err (Box::new (err_resp)). – CoronA Jan 22, 2024 at 2:04 @CoronA it gives me a new issue. ? couldn't convert the error to std::boxed::Box – Jinn Jan 22, 2024 at 2:21

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WebJul 1, 2014 · Generics in Rust :: mismatched types expected struct `Token<'_, T>` found struct `Token<'_, i32> Hot Network Questions If electric field inside a conductor is always zero, then why do free electrons move?WebJun 7, 2024 · use actix_web:: {App, HttpServer}; use anyhow::Result; mod error; # [actix_rt::main] async fn main () -> Result< ()> { HttpServer::new ( App::new ()) .bind ("127.0.0.1:8080")? .run () .await.map_err (anyhow::Error::from) } Share Improve this answer Follow answered Apr 18, 2024 at 2:55 Caleb Hattingh 8,885 2 31 43 Add a …

WebOct 21, 2016 · 1 Answer Sorted by: 3 You linked to the documentation of next, but you're not using next (not directly anyway), you're using a for loop. In a for loop the type of the iteration variable (i.e. the type of line in your code) is the Item type of the iterator, which in your case is Result.WebOne "Rust-y" way of solving this is typically to redeclare a variable with the same name: let date_1 = String::new (); /* type: std::string::String */ // ... let date_1 = date_1.split ("/"); /* type: std::str::Split<'_, &str> */. The second date_1 is a different variable (hence it can have a different type), but it has the same name as the ...

WebMay 12, 2024 · The file is actually a Result in the 2nd snippet. We can iterate over the Ok value in a Result, just like another any other container. So if the Result is an Ok value, we flat_map over the Ok value, turning it into an iterator that iterates the lines in the buffer, and if it's an Err, we do nothing and just return the iterator. –WebAug 1, 2024 · I am trying to use the anyhow crate, specifically anyhow::Result. The sample code is. use anyhow::Result; fn main () -> Result< ()> { std::fs::read_to_string …

WebAug 30, 2024 · Sorted by: 7. No ; Returns can only be used at the end of a block. To fix this you can either: pub fn new (s: String) -> Option { if s.len () > 10 { return None; // Add a early return here } Some (10) } Or. pub fn new (s: String) -> Option { if s.len () > 10 { None } else { Some (10) } // This is now the end of the function block. top potassium fruits pinecrest california hotelsWebMar 11, 2024 · expected type `fn(Value) -> Result` found type `fn(Value) -> Result` You can't return the wrong type; that's just a fundamental condition of a statically typed language. Return the correct type instead: Result.top potassium supplementsWebOct 17, 2024 · 1 Answer Sorted by: 6 The value returned by async fn is a Future. A Future is an asynchronous computation that can produce a value (although that value may be empty, e.g. ()). Also inside an async fn, you can use .await to wait for the completion of another type that implements the Future trait.top potassium rich foods listWebAug 14, 2024 · It didn't look as a feasible task for me to combine the lookup_* functions, because the closure in the common function would have to take a very complex set of arguments. And I would need to put too many constraints into that function. For example, in the search for enum, I don't need the order of modules to be stable, but I would need to …top potato growing countriesWebmismatched types expected enum `std::result::Result`, found () note: expected type `std::result::Result<(), std::fmt::Error>` found type `()`rustc(E0308) From what I …pinecrest california weatherbut the function it is called in ret...pinecrest california webcam