With the latest Rust Analyzer release in VS Code (latest) I'm receiving the following error when deriving Serialize/Deserialize (Serde) on a simple struct:
proc macro returned error: proc-macro panicked: called Result::unwrap() on an Err value: ParseFloatError { kind: Invalid } rust-analyzer macro-error
I am getting the error with the following simple code:
use std::{fs::File, io, path::Path};
use serde::{Deserialize, Serialize};
fn main() -> Result<(), io::Error> {
let move_a = Move {
direction: Direction::North,
count: 3,
};
let file = serialize(&move_a, &Path::new("./tmp.txt"))?;
let move_b = deserialize(file)?;
println!("Move A = {:?}", move_a);
println!("Move B = {:?}", move_b);
assert_eq!(move_a, move_b);
Ok(())
}
fn serialize(the_move: &Move, path: &Path) -> Result<File, io::Error> {
serde_json::to_writer(io::BufWriter::new(File::create(path)?), the_move)?;
File::open(path)
}
fn deserialize(file: File) -> Result<Move, io::Error> {
let u = serde_json::from_reader(io::BufReader::new(file))?;
Ok(u)
}
#[derive(Debug, Serialize, Deserialize, Eq, PartialEq)]
enum Direction {
North,
NorthEast,
East,
SouthEast,
South,
SouthWest,
West,
NorthWest,
}
#[derive(Debug, Serialize, Deserialize, Eq, PartialEq)]
struct Move {
pub direction: Direction,
pub count: u8,
}This code compile as runs fine from the command line using cargo run.
Also, somewhat counter-intuitively, the "Move" structure is recognized at the usage site as correctly implementing Serialize/Deserialize.
Is this a bug in rust-analyzer (it seems like it) or am I doing something wrong.
Here is my Cargo.toml:
[package]
name = "ex-bb2-serde-json"
version = "0.1.0"
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
With the latest Rust Analyzer release in VS Code (latest) I'm receiving the following error when deriving Serialize/Deserialize (Serde) on a simple struct:
I am getting the error with the following simple code:
This code compile as runs fine from the command line using
cargo run.Also, somewhat counter-intuitively, the "Move" structure is recognized at the usage site as correctly implementing Serialize/Deserialize.
Is this a bug in rust-analyzer (it seems like it) or am I doing something wrong.
Here is my Cargo.toml: