[−][src]Macro libsugar::bop

macro_rules! bop {
    {} => { ... };
    { let $($p:pat $(| $t:ty)? $(= $e:expr)?),*} => { ... };
    { $($l:lifetime :)? match && $($p:pat = $e:expr),* => $b:block else $el:block } => { ... };
    { bool $($l:lifetime :)? match && $($p:pat = $e:expr),* => $b:block $(else $el:block)? } => { ... };
    { !loop match && $($p:pat = $e:expr),* => $b:block else $el:block } => { ... };
    { !loop bool match && $($p:pat = $e:expr),* => $b:block $(else $el:block)? } => { ... };
    { $x:expr $(;)? } => { ... };
    { || $x:expr $(;)? } => { ... };
    { && $x:expr $(;)? } => { ... };
    { = $x:ident $(;)? } => { ... };
    { || $x:expr ; $($op:tt $a:expr $(;$n:tt)?),* } => { ... };
    { && $x:expr ; $($op:tt $a:expr $(;$n:tt)?),* } => { ... };
    { = $x:ident ; $($op:tt $a:expr $(;$n:tt)?),* } => { ... };
    { || $x:expr ; $op:tt $(;)? } => { ... };
    { && $x:expr ; $op:tt $(;)? } => { ... };
    { = $x:ident ; $op:tt $(;)? } => { ... };
    { || $x:expr ; $op:tt ; $($a:expr $(;$n:tt)?),* } => { ... };
    { && $x:expr ; $op:tt ; $($a:expr $(;$n:tt)?),* } => { ... };
    { = $x:ident ; $op:tt ; $($a:expr $(;$n:tt)?),* } => { ... };
    { $fname:ident ; $($v:expr),* => in && $t:expr } => { ... };
    { $fname:ident ; $($v:expr),* => in || $t:expr } => { ... };
    { $fname:ident ; $v:expr => in && $($t:expr),* } => { ... };
    { $fname:ident ; $v:expr => in || $($t:expr),* } => { ... };
    { $($fname:ident ;)? => in && $t:expr  } => { ... };
    { $($fname:ident ;)? => in || $t:expr  } => { ... };
    { $($fname:ident ;)? $v:expr => in && } => { ... };
    { $($fname:ident ;)? $v:expr => in || } => { ... };
    { $($v:expr),* => in && $t:expr } => { ... };
    { $($v:expr),* => in || $t:expr } => { ... };
    { $v:expr => in && $($t:expr),* } => { ... };
    { $v:expr => in || $($t:expr),* } => { ... };
}

batch opers

Usage

Basic

batch ||
```
bop!(|| 4; == 2, > 3);
```
equivalent to
```
4 == 2 || 4 > 3;
```
batch &&
```
bop!(&& 4; == 2, > 3);
```
equivalent to
```
4 == 2 && 4 > 3;
```

!

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

equivalent to

1 == a || a == 2

batch op

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

equivalent to

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

Set

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

equivalent to

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

Let

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

equivalent to

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

Let chain

basic

let a = Some(1);
let b = Some(2);

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

equivalent to

let a = Some(1);
let b = Some(2);

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

bool

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

equivalent to

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

!loop

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

equivalent to

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

!loop bool

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

equivalent to

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

In

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

equivalent to

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

||

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

equivalent to

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

custom funcion name
ⓘThis example is not tested
```
let c = bop!(has; &1, &2 => in && r);
```
equivalent to
ⓘThis example is not tested
```
let c = r.has(&1) && r.has(&2);
```