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pub trait Merge<T, E> {
fn merge<T1, U, F: FnOnce(T, T1) -> Result<U, E>>(
self,
res1: Result<T1, E>,
op: F,
) -> Result<U, E>;
fn merge2<T1, T2, U, F: FnOnce(T, T1, T2) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
op: F,
) -> Result<U, E>;
fn merge3<T1, T2, T3, U, F: FnOnce(T, T1, T2, T3) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
res3: Result<T3, E>,
op: F,
) -> Result<U, E>;
fn merge4<T1, T2, T3, T4, U, F: FnOnce(T, T1, T2, T3, T4) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
res3: Result<T3, E>,
res4: Result<T4, E>,
op: F,
) -> Result<U, E>;
}
impl<T, E> Merge<T, E> for Result<T, E> {
///
/// ```
/// use gearbox::rails::ext::blocking::Merge;
///
/// fn func_xyz(v: u32, w: u32) -> Result<u32,u32> {
/// Ok( v + w)
/// }
///
/// let v = Ok(1);
/// let w = Ok(2);
/// v.merge(w, |var_v, var_w| func_xyz(var_v, var_w)).ok();
/// ```
#[inline]
fn merge<T1, U, F: FnOnce(T, T1) -> Result<U, E>>(
self,
res1: Result<T1, E>,
op: F,
) -> Result<U, E> {
match (self, res1) {
(Ok(t), Ok(t1)) => op(t, t1),
(Err(e), _) => Err(e),
(_, Err(e1)) => Err(e1),
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::Merge;
///
/// fn func_xyz(v: u32, w: u32, x: u32) -> Result<u32,u32> {
/// Ok( v + w + x )
/// }
///
/// let v = Ok(1);
/// let w = Ok(2);
/// let x = Ok(2);
/// v.merge2(w, x, |var_v, var_w, var_x| func_xyz(var_v, var_w, var_x)).ok();
/// ```
#[inline]
fn merge2<T1, T2, U, F: FnOnce(T, T1, T2) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
op: F,
) -> Result<U, E> {
match (self, res1, res2) {
(Ok(t), Ok(t1), Ok(t2)) => op(t, t1, t2),
(Err(e), _, _) => Err(e),
(_, Err(e), _) => Err(e),
(_, _, Err(e)) => Err(e),
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::Merge;
///
/// fn func_xyz(v: u32, w: u32, x: u32, y: u32) -> Result<u32,u32> {
/// Ok( v + w + x + y)
/// }
///
/// let v = Ok(1);
/// let w = Ok(2);
/// let x = Ok(2);
/// let y = Ok(2);
/// v.merge3(w, x, y, |var_v, var_w, var_x, var_y| func_xyz(var_v, var_w, var_x, var_y)).ok();
/// ```
#[inline]
fn merge3<T1, T2, T3, U, F: FnOnce(T, T1, T2, T3) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
res3: Result<T3, E>,
op: F,
) -> Result<U, E> {
match (self, res1, res2, res3) {
(Ok(t), Ok(t1), Ok(t2), Ok(t3)) => op(t, t1, t2, t3),
(Err(e), _, _, _) => Err(e),
(_, Err(e), _, _) => Err(e),
(_, _, Err(e), _) => Err(e),
(_, _, _, Err(e)) => Err(e),
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::Merge;
///
/// fn func_xyz(v: u32, w: u32, x: u32, y: u32, z: u32) -> Result<u32,u32> {
/// Ok( v + w + x + y + z)
/// }
///
/// let v = Ok(1);
/// let w = Ok(2);
/// let x = Ok(2);
/// let y = Ok(2);
/// let z = Ok(2);
/// v.merge4(w, x, y, z, |var_v, var_w, var_x, var_y, var_z| func_xyz(var_v, var_w, var_x, var_y, var_z)).ok();
/// ```
#[inline]
fn merge4<T1, T2, T3, T4, U, F: FnOnce(T, T1, T2, T3, T4) -> Result<U, E>>(
self,
res1: Result<T1, E>,
res2: Result<T2, E>,
res3: Result<T3, E>,
res4: Result<T4, E>,
op: F,
) -> Result<U, E> {
match (self, res1, res2, res3, res4) {
(Ok(t), Ok(t1), Ok(t2), Ok(t3), Ok(t4)) => op(t, t1, t2, t3, t4),
(Err(e), _, _, _, _) => Err(e),
(_, Err(e), _, _, _) => Err(e),
(_, _, Err(e), _, _) => Err(e),
(_, _, _, Err(e), _) => Err(e),
(_, _, _, _, Err(e)) => Err(e),
}
}
}
pub trait MergeOption<T> {
fn merge<T1, U, F: FnOnce(T, T1) -> Option<U>>(self, res1: Option<T1>, op: F) -> Option<U>;
fn merge2<T1, T2, U, F: FnOnce(T, T1, T2) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
op: F,
) -> Option<U>;
fn merge3<T1, T2, T3, U, F: FnOnce(T, T1, T2, T3) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
res3: Option<T3>,
op: F,
) -> Option<U>;
fn merge4<T1, T2, T3, T4, U, F: FnOnce(T, T1, T2, T3, T4) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
res3: Option<T3>,
res4: Option<T4>,
op: F,
) -> Option<U>;
}
impl<T> MergeOption<T> for Option<T> {
///
/// ```
/// use gearbox::rails::ext::blocking::MergeOption;
///
/// fn func_xyz(v: u32, w: u32) -> Option<u32> {
/// Some( v + w)
/// }
///
/// let v = Some(1);
/// let w = Some(2);
/// v.merge(w, |var_v, var_w| func_xyz(var_v, var_w));
/// ```
#[inline]
fn merge<T1, U, F: FnOnce(T, T1) -> Option<U>>(self, res1: Option<T1>, op: F) -> Option<U> {
match (self, res1) {
(Some(t), Some(t1)) => op(t, t1),
_ => None,
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::MergeOption;
///
/// fn func_xyz(v: u32, w: u32, x: u32) -> Option<u32> {
/// Some( v + w + x )
/// }
///
/// let v = Some(1);
/// let w = Some(2);
/// let x = Some(2);
/// v.merge2(w, x, |var_v, var_w, var_x| func_xyz(var_v, var_w, var_x));
/// ```
#[inline]
fn merge2<T1, T2, U, F: FnOnce(T, T1, T2) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
op: F,
) -> Option<U> {
match (self, res1, res2) {
(Some(t), Some(t1), Some(t2)) => op(t, t1, t2),
_ => None,
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::MergeOption;
///
/// fn func_xyz(v: u32, w: u32, x: u32, y: u32) -> Option<u32> {
/// Some( v + w + x + y)
/// }
///
/// let v = Some(1);
/// let w = Some(2);
/// let x = Some(2);
/// let y = Some(2);
/// v.merge3(w, x, y, |var_v, var_w, var_x, var_y| func_xyz(var_v, var_w, var_x, var_y));
/// ```
#[inline]
fn merge3<T1, T2, T3, U, F: FnOnce(T, T1, T2, T3) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
res3: Option<T3>,
op: F,
) -> Option<U> {
match (self, res1, res2, res3) {
(Some(t), Some(t1), Some(t2), Some(t3)) => op(t, t1, t2, t3),
_ => None,
}
}
///
/// ```
/// use gearbox::rails::ext::blocking::MergeOption;
///
/// fn func_xyz(v: u32, w: u32, x: u32, y: u32, z: u32) -> Option<u32> {
/// Some( v + w + x + y + z)
/// }
///
/// let v = Some(1);
/// let w = Some(2);
/// let x = Some(2);
/// let y = Some(2);
/// let z = Some(2);
/// v.merge4(w, x, y, z, |var_v, var_w, var_x, var_y, var_z| func_xyz(var_v, var_w, var_x, var_y, var_z));
/// ```
#[inline]
fn merge4<T1, T2, T3, T4, U, F: FnOnce(T, T1, T2, T3, T4) -> Option<U>>(
self,
res1: Option<T1>,
res2: Option<T2>,
res3: Option<T3>,
res4: Option<T4>,
op: F,
) -> Option<U> {
match (self, res1, res2, res3, res4) {
(Some(t), Some(t1), Some(t2), Some(t3), Some(t4)) => op(t, t1, t2, t3, t4),
_ => None,
}
}
}
#[cfg(test)]
mod test {
use super::Merge;
#[test]
fn test_merge() {
fn func_xyz(v: u32, w: u32) -> Result<u32, u32> {
Ok(v + w)
}
let v = Ok(1);
let w = Ok(2);
v.merge(w, |var_v, var_w| func_xyz(var_v, var_w)).ok();
}
#[test]
fn test_merge2() {
fn func_xyz(v: u32, w: u32, x: u32) -> Result<u32, u32> {
Ok(v + w + x)
}
let v = Ok(1);
let w = Ok(2);
let x = Ok(2);
v.merge2(w, x, |var_v, var_w, var_x| func_xyz(var_v, var_w, var_x))
.ok();
}
#[test]
fn test_merge3() {
fn func_xyz(v: u32, w: u32, x: u32, y: u32) -> Result<u32, u32> {
Ok(v + w + x + y)
}
let v = Ok(1);
let w = Ok(2);
let x = Ok(2);
let y = Ok(2);
v.merge3(w, x, y, |var_v, var_w, var_x, var_y| {
func_xyz(var_v, var_w, var_x, var_y)
})
.ok();
}
#[test]
fn test_merge4() {
fn func_xyz(v: u32, w: u32, x: u32, y: u32, z: u32) -> Result<u32, u32> {
Ok(v + w + x + y + z)
}
let v = Ok(1);
let w = Ok(2);
let x = Ok(2);
let y = Ok(2);
let z = Ok(2);
v.merge4(w, x, y, z, |var_v, var_w, var_x, var_y, var_z| {
func_xyz(var_v, var_w, var_x, var_y, var_z)
})
.ok();
}
}