Struct FmtWrapper

pub struct FmtWrapper<T>(pub T);

A wrapper around a type which will use the Display and FromStr implementations for serialization / deserialization.

For example: u8, i8, i16, u16, all integer types… bool etc.

Examples

use std::path::Path;
use dir_structure::DirStructureItem;

use dir_structure::FmtWrapper;

#[derive(dir_structure::DirStructure, PartialEq, Debug)]
struct Dir {
   #[dir_structure(path = "f.txt", with_newtype = FmtWrapper<u8>)]
   f: u8,
   #[dir_structure(path = "b.txt", with_newtype = FmtWrapper<bool>)]
   b: bool,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let d = Path::new("dir");
    std::fs::create_dir_all(&d)?;
    std::fs::write(d.join("f.txt"), "42")?;
    std::fs::write(d.join("b.txt"), "true")?;
    let mut dir = Dir::read(&d)?;
    assert_eq!(dir.f, 42);
    assert_eq!(dir.b, true);
    dir.f = 100;
    dir.b = false;
    dir.write(&d)?;
    assert_eq!(std::fs::read_to_string(d.join("f.txt"))?, "100");
    assert_eq!(std::fs::read_to_string(d.join("b.txt"))?, "false");
    Ok(())
}

Tuple Fields

0: T

Trait Implementations

impl<'a, T> FromRefForWriter<'a> for FmtWrapper<T>

where T: Display + 'a,

type Inner = T

The inner type to cast.

type Wr = FmtWrapperRefWr<'a, T>

The reference type to cast to.

fn from_ref_for_writer(value: &'a Self::Inner) -> Self::Wr

Casts the reference to the inner type to a WriteTo reference type.

impl<T> NewtypeToInner for FmtWrapper<T>

type Inner = T

The inner type.

fn into_inner(self) -> Self::Inner

Converts the newtype to its inner type.

impl<T> ReadFrom for FmtWrapper<T>

where T: FromStr, T::Err: Into<Box<dyn Error + Send + Sync>>,

fn read_from(path: &Path) -> Result<Self>

where Self: Sized,

Reads the structure from the specified path, which can be either a file or a directory.

impl<T> WriteTo for FmtWrapper<T>

where T: Display,

fn write_to(&self, path: &Path) -> Result<()>

Writes the structure to the specified path.