batch_oper

重命名为 libsugar

• 仓库

batch_oper 为某些操作提供了一些批量操作宏

请参阅 https://docs.rs/batch_oper/
这里仅作简要介绍

用法

• 基本
  • batch ||

    bop!(|| 4; == 2, > 3);
    

    等同于

    4 == 2 || 4 > 3
    

  • batch &&

    bop!(&& 4; == 2, > 3);
    

    等同于

    4 == 2 && 4 > 3
    

  • !

    bop!(|| a; == 1;!, == 2);
    

    等同于

    1 == a || a == 2
    

  • 批量操作

    bop!(&& 5; > ; 2, 3, 6;!);
    

    等同于

    5 > 2 && 5 > 3 && 6 > 5
    

• 设置

  let mut a = 1;
  bop!(= a; + 1, - 2;!, * 3);
  

  等同于

  let mut a = 1;
  a = a + 1;
  a = 2 - a;
  a = a * 3;
  

• 让

  bop! { let a|u8 = 1, mut b = 2 }
  

  等同于

  let a: u8 = 1;
  let mut b = 2;
  

• 链式让
  • 基本

    let a = Some(1);
    let b = Some(2);
    
    let _: i32 = bop!(match && Some(va) = a, Some(vb) = b => {
        1
    } else {
        2
    });
    

    等同于

    let a = Some(1);
    let b = Some(2);
    
    let _: i32 = loop {
        if let Some(va) = a {
            if let Some(vb) = b {
                break { 1 };
            }
        }
        break { 2 };
    };
    

  • 布尔值

    let _: bool = bop!(bool match && Some(va) = a, Some(vb) = b => {
        1
    } else {
        2
    });
    

    等同于

    let _: bool = loop {
        if let Some(va) = a {
            if let Some(vb) = b {
                { 1 };
                break true;
            }
        }
        { 2 };
        break false;
    };
    

  • !循环

    let _: i32 = bop!(!loop match && Some(va) = a, Some(vb) = b => {
        1
    } else {
        2
    });
    

    等同于

    let _: i32 = if let Some(va) = a {
        if let Some(vb) = b {
            { 1 }
        } else { { 2 } }
    } else  { { 2 } }
    

  • !循环 布尔值

    let _: bool = bop!(!loop bool match && Some(va) = a, Some(vb) = b => {
        1
    } else {
        2
    });
    

    等同于

    let _: bool = if let Some(va) = a {
        if let Some(vb) = b {
            { 1 }; true
        } else { { 2 }; false }
    } else  { { 2 }; false }
    

• 在

  let r = 0..5;
  let c = bop!(&1, &2 => in && r);
  

  等同于

  let r = 0..5;
  let c = r.contains(&1) && r.contains(&2);
  

  • ||

    let c = bop!(&1, &2 => in || r);
    

    等同于

    let c = r.contains(&1) || r.contains(&2);
    

  • 自定义函数名

    let c = bop!(has; &1, &2 => in && r);
    

    等同于

    let c = r.has(&1) && r.has(&2);
    

• 使用

  let v = (1, 2);
  let v2 = (3, 4);
  using!((a, b) = v, (c, d) = v2; {
    println!("{} {} {} {}", a, b, c, d)
  })
  

  等同于

  let v = (1, 2);
  let v2 = (3, 4);
  {
    let (a, b) = v;
    let (c, d) = v2;
    {
      println!("{} {} {} {}", a, b, c, d)
    }
  }