acursor 0.0.2

Various functions to write data with a Cursor
Documentation 
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use concat_idents::concat_idents;
use std::{
    any::type_name,
    io::{self, Write},
};

macro_rules! generate_write_number {
    ($type:ty) => {
        concat_idents!(fn_name = write_, $type {
            /// # Examples
            ///
            /// ```
            /// let mut cursor: Cursor<Vec<u8>> = Cursor::new(Vec::new());
            #[doc = concat!("cursor.write_", stringify!($type), "(100).unwrap();")]
            ///
            #[doc = concat!("println!(\"My number: {:?}\", cursor.read_", stringify!($type), "().unwrap());")]
            /// ```
            fn fn_name(&mut self, number: $type) -> Result<(), io::Error> {
                self.write_all(&number.to_be_bytes())?;

                Ok(())
            }
        });
    };
}

macro_rules! generate_write_float {
    ($type:ty) => {
        concat_idents!(fn_name = write_, $type {
            /// # Examples
            ///
            /// ```
            /// let mut cursor: Cursor<Vec<u8>> = Cursor::new(Vec::new());
            #[doc = concat!("cursor.write_", stringify!($type), "(100.0).unwrap();")]
            ///
            #[doc = concat!("println!(\"My number: {:?}\", cursor.read_", stringify!($type), "().unwrap());")]
            /// ```
            fn fn_name(&mut self, number: $type) -> Result<(), io::Error> {
                self.write_all(&number.to_be_bytes())?;

                Ok(())
            }
        });
    };
}

pub trait WriteBytes: Write {
    generate_write_number!(u8);
    generate_write_number!(i8);
    generate_write_number!(u16);
    generate_write_number!(i16);
    generate_write_number!(u32);
    generate_write_number!(i32);
    generate_write_number!(u64);
    generate_write_number!(i64);
    generate_write_number!(u128);
    generate_write_number!(i128);

    generate_write_float!(f32);
    generate_write_float!(f64);

    /// # Examples
    ///
    /// ```
    /// let mut cursor: Cursor<Vec<u8>> = Cursor::new(Vec::new());
    /// cursor.write_string::<u8>("Hello".to_string()).unwrap();
    ///
    /// println!("My string: {:?}", cursor.read_string::<u8>().unwrap());
    /// ```
    fn write_string<T>(&mut self, string: String) -> Result<(), io::Error> {
        match type_name::<T>() {
            "u8" => self.write_u8(string.len().try_into().unwrap())?,
            "u16" => self.write_u16(string.len().try_into().unwrap())?,
            "u32" => self.write_u32(string.len().try_into().unwrap())?,
            _ => unimplemented!(),
        };

        self.write_all(string.as_bytes())?;

        Ok(())
    }
}

impl<R: Write + ?Sized> WriteBytes for R {}