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#![cfg_attr(not(feature = "std"), no_std)]
#![allow(dead_code)]
#[cfg(not(feature = "std"))]
extern crate alloc;
#[cfg(not(feature = "std"))]
use alloc::{
borrow::Cow,
string::{String, ToString},
};
#[cfg(feature = "std")]
use std::borrow::Cow;
use derive_more::From;
use static_assertions::assert_not_impl_any;
mod structs {
use super::*;
mod unit {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Unit;
#[derive(Debug, From, PartialEq)]
struct Tuple();
#[derive(Debug, From, PartialEq)]
struct Struct {}
#[test]
fn assert() {
assert_eq!(Unit, ().into());
assert_eq!(Tuple(), ().into());
assert_eq!(Struct {}, ().into());
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Unit<const N: usize>;
#[derive(Debug, From, PartialEq)]
struct Tuple<const N: usize>();
#[derive(Debug, From, PartialEq)]
struct Struct<const N: usize> {}
#[test]
fn assert() {
assert_eq!(Unit::<1>, ().into());
assert_eq!(Tuple::<1>(), ().into());
assert_eq!(Struct::<1> {}, ().into());
}
}
}
mod single_field {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple(i32);
#[derive(Debug, From, PartialEq)]
struct Struct {
field: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(42), 42.into());
assert_eq!(Struct { field: 42 }, 42.into());
}
mod types {
use super::*;
#[derive(Debug, From, PartialEq)]
#[from(i8)]
#[from(i16)]
struct Tuple(i32);
#[derive(Debug, From, PartialEq)]
#[from(&str, Cow<'_, str>)]
struct Struct {
field: String,
}
#[test]
fn assert() {
assert_not_impl_any!(Tuple: From<i32>);
assert_not_impl_any!(Struct: From<String>);
assert_eq!(Tuple(42), 42_i8.into());
assert_eq!(Tuple(42), 42_i16.into());
assert_eq!(
Struct {
field: "42".to_string(),
},
"42".into(),
);
assert_eq!(
Struct {
field: "42".to_string(),
},
Cow::Borrowed("42").into(),
);
}
}
mod forward {
use super::*;
#[derive(Debug, From, PartialEq)]
#[from(forward)]
struct Tuple(i32);
#[derive(Debug, From, PartialEq)]
#[from(forward)]
struct Struct {
field: String,
}
#[test]
fn assert() {
assert_eq!(Tuple(42), 42_i8.into());
assert_eq!(Tuple(42), 42_i16.into());
assert_eq!(Tuple(42), 42_i32.into());
assert_eq!(
Struct {
field: "42".to_string(),
},
"42".into(),
);
assert_eq!(
Struct {
field: "42".to_string(),
},
Cow::Borrowed("42").into(),
);
}
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<T>(T);
#[derive(Debug, From, PartialEq)]
struct Struct<T> {
field: T,
}
#[test]
fn assert() {
assert_eq!(Tuple(42), 42.into());
assert_eq!(Struct { field: 42 }, 42.into());
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<'a, T>(&'a T);
#[derive(Debug, From, PartialEq)]
struct Struct<'a, T> {
field: &'a T,
}
#[test]
fn assert() {
assert_eq!(Tuple(&42), (&42).into());
assert_eq!(Struct { field: &42 }, (&42).into());
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<T: 'static>(&'static T);
#[derive(Debug, From, PartialEq)]
struct Struct<T: 'static> {
field: &'static T,
}
#[test]
fn assert() {
assert_eq!(Tuple(&42), (&42).into());
assert_eq!(Struct { field: &42 }, (&42).into());
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<T: Clone>(T);
#[derive(Debug, From, PartialEq)]
struct Struct<T: Clone> {
field: T,
}
#[test]
fn assert() {
assert_eq!(Tuple(42), 42.into());
assert_eq!(Struct { field: 42 }, 42.into());
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<const N: usize, T>(T);
#[derive(Debug, From, PartialEq)]
struct Struct<T, const N: usize> {
field: T,
}
#[test]
fn assert() {
assert_eq!(Tuple::<1, _>(1), 1.into());
assert_eq!(Struct::<_, 1> { field: 1 }, 1.into());
}
}
}
}
mod multi_field {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple(i32, i16);
#[derive(Debug, From, PartialEq)]
struct Struct {
field1: i32,
field2: i16,
}
#[test]
fn assert() {
assert_eq!(Tuple(0, 1), (0, 1_i16).into());
assert_eq!(
Struct {
field1: 0,
field2: 1,
},
(0, 1_i16).into(),
);
}
mod types {
use super::*;
#[derive(Debug, From, PartialEq)]
#[from((i16, i16))]
struct Tuple(i32, i16);
#[derive(Debug, From, PartialEq)]
#[from((i16, i16))]
struct Struct {
field1: i32,
field2: i16,
}
#[test]
fn assert() {
assert_not_impl_any!(Tuple: From<(i32, i16)>);
assert_not_impl_any!(Struct: From<(i32, i16)>);
assert_eq!(Tuple(0, 1), (0_i16, 1_i16).into());
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
}
}
mod forward {
use super::*;
#[derive(Debug, From, PartialEq)]
#[from(forward)]
struct Tuple(i32, i16);
#[derive(Debug, From, PartialEq)]
#[from(forward)]
struct Struct {
field1: i32,
field2: i16,
}
#[test]
fn assert() {
assert_eq!(Tuple(0, 1), (0_i8, 1_i8).into());
assert_eq!(Tuple(0, 1), (0_i8, 1_i16).into());
assert_eq!(Tuple(0, 1), (0_i16, 1_i8).into());
assert_eq!(Tuple(0, 1), (0_i16, 1_i16).into());
assert_eq!(Tuple(0, 1), (0_i32, 1_i8).into());
assert_eq!(Tuple(0, 1), (0_i32, 1_i16).into());
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i8, 1_i8).into(),
);
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i8, 1_i16).into(),
);
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i8).into(),
);
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i32, 1_i8).into(),
);
assert_eq!(
Struct {
field1: 0,
field2: 1
},
(0_i32, 1_i16).into(),
);
}
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<A, B>(A, B);
#[derive(Debug, From, PartialEq)]
struct Struct<A, B> {
field1: A,
field2: B,
}
#[test]
fn assert() {
assert_eq!(Tuple(1, 2_i8), (1, 2_i8).into());
assert_eq!(
Struct {
field1: 1,
field2: 2_i8,
},
(1, 2_i8).into(),
);
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<'a, A, B>(&'a A, &'a B);
#[derive(Debug, From, PartialEq)]
struct Struct<'a, A, B> {
field1: &'a A,
field2: &'a B,
}
#[test]
fn assert() {
assert_eq!(Tuple(&1, &2_i8), (&1, &2_i8).into());
assert_eq!(
Struct {
field1: &1,
field2: &2_i8,
},
(&1, &2_i8).into(),
);
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
struct Tuple<A: Clone, B>(A, B);
#[derive(Debug, From, PartialEq)]
struct Struct<A: Clone, B> {
field1: A,
field2: B,
}
#[test]
fn assert() {
assert_eq!(Tuple(1, 2_i8), (1, 2_i8).into());
assert_eq!(
Struct {
field1: 1,
field2: 2_i8,
},
(1, 2_i8).into(),
);
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
struct ConstTuple<const N: usize, A, B>(A, B);
#[derive(Debug, From, PartialEq)]
struct ConstStruct<const N: usize, A, B> {
field1: A,
field2: B,
}
#[test]
fn assert() {
assert_eq!(ConstTuple::<1, _, _>(1, 2_i8), (1, 2_i8).into());
assert_eq!(
ConstStruct::<1, _, _> {
field1: 1,
field2: 2_i8,
},
(1, 2_i8).into(),
);
}
}
}
}
}
mod enums {
use super::*;
mod unit_variant {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
#[from]
Unit,
Unnamed(),
Named {},
}
#[test]
fn assert() {
assert_eq!(Enum::Unit, ().into());
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unit {
Variant,
}
#[derive(Debug, From, PartialEq)]
enum Tuple {
Variant(),
}
#[derive(Debug, From, PartialEq)]
enum Struct {
Variant {},
}
assert_not_impl_any!(Unit: From<()>);
assert_not_impl_any!(Tuple: From<()>);
assert_not_impl_any!(Struct: From<()>);
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unit<const N: usize> {
Variant,
}
#[derive(Debug, From, PartialEq)]
enum Tuple<const N: usize> {
Variant(),
}
#[derive(Debug, From, PartialEq)]
enum Struct<const N: usize> {
Variant {},
}
assert_not_impl_any!(Unit<0>: From<()>);
assert_not_impl_any!(Tuple<0>: From<()>);
assert_not_impl_any!(Struct<0>: From<()>);
}
}
mod from {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unit {
#[from]
Variant,
AutomaticallySkipped,
}
#[derive(Debug, From, PartialEq)]
enum Tuple {
#[from]
Variant(),
AutomaticallySkipped(),
}
#[derive(Debug, From, PartialEq)]
enum Struct {
#[from]
Variant {},
AutomaticallySkipped {},
}
#[test]
fn assert() {
assert_eq!(Unit::Variant, ().into());
assert_eq!(Tuple::Variant(), ().into());
assert_eq!(Struct::Variant {}, ().into());
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unit<const N: usize> {
#[from]
Variant,
}
#[derive(Debug, From, PartialEq)]
enum Tuple<const N: usize> {
#[from]
Variant(),
}
#[derive(Debug, From, PartialEq)]
enum Struct<const N: usize> {
#[from]
Variant {},
}
#[test]
fn assert() {
assert_eq!(Unit::<0>::Variant, ().into());
assert_eq!(Tuple::<0>::Variant(), ().into());
assert_eq!(Struct::<0>::Variant {}, ().into());
}
}
}
}
mod single_field_variant {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
Unnamed(i8),
Named { field: i16 },
}
#[test]
fn assert() {
assert_eq!(Enum::Unnamed(1), 1_i8.into());
assert_eq!(Enum::Named { field: 1 }, 1_i16.into());
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T> {
Variant(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T> {
Variant { field: T },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1), 1.into());
assert_eq!(Struct::Variant { field: 1 }, 1.into());
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, T> {
Variant(&'a T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, T> {
Variant { field: &'a T },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1), (&1).into());
assert_eq!(Struct::Variant { field: &1 }, (&1).into());
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: 'static> {
Variant(&'static T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: 'static> {
Variant { field: &'static T },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1), (&1).into());
assert_eq!(Struct::Variant { field: &1 }, (&1).into());
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: Clone> {
Variant(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: Clone> {
Variant { field: T },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1), 1.into());
assert_eq!(Struct::Variant { field: 1 }, 1.into());
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T, const N: usize> {
Variant(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<const N: usize, T> {
Variant { field: T },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<_, 1>(1), 1.into());
assert_eq!(Struct::Variant::<1, _> { field: 1 }, 1.into());
}
}
}
mod from {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple {
#[from]
Variant(i8),
AutomaticallySkipped(i8),
}
#[derive(Debug, From, PartialEq)]
enum Struct {
#[from]
Variant {
field: i8,
},
AutomaticallySkipped {
field: i8,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1), 1_i8.into());
assert_eq!(Struct::Variant { field: 1 }, 1_i8.into());
}
}
mod skip {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
Unnamed(i8),
#[from(skip)]
UnnamedSkipped(i8),
Named {
field: i16,
},
#[from(skip)]
NamedSkipped {
field: i16,
},
}
#[test]
fn assert() {
assert_eq!(Enum::Unnamed(1), 1_i8.into());
assert_eq!(Enum::Named { field: 1 }, 1_i16.into());
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T> {
Variant(T),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T> {
Variant {
field: T,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1), 1.into());
assert_eq!(Struct::Variant { field: 1 }, 1.into());
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, T> {
Variant(&'a T),
#[from(skip)]
Skipped(&'a T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, T> {
Variant {
field: &'a T,
},
#[from(skip)]
Skipped {
field: &'a T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1), (&1).into());
assert_eq!(Struct::Variant { field: &1 }, (&1).into());
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: 'static> {
Variant(&'static T),
#[from(skip)]
Skipped(&'static T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: 'static> {
Variant {
field: &'static T,
},
#[from(skip)]
Skipped {
field: &'static T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1), (&1).into());
assert_eq!(Struct::Variant { field: &1 }, (&1).into());
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: Clone> {
Variant(T),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: Clone> {
Variant {
field: T,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1), 1.into());
assert_eq!(Struct::Variant { field: 1 }, 1.into());
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T, const N: usize> {
Variant(T),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<const N: usize, T> {
Variant {
field: T,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<_, 1>(1), 1.into());
assert_eq!(Struct::Variant::<1, _> { field: 1 }, 1.into());
}
}
mod concrete {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T> {
Variant(i32),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T> {
Variant {
field: i32,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<i32>(1), 1.into());
assert_eq!(Struct::Variant::<i32> { field: 1 }, 1.into());
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, T> {
Variant(&'a i32),
#[from(skip)]
Skipped(&'a T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, T> {
Variant {
field: &'a i32,
},
#[from(skip)]
Skipped {
field: &'a T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<i32>(&1), (&1).into());
assert_eq!(
Struct::Variant::<i32> { field: &1 },
(&1).into()
);
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: 'static> {
Variant(&'static i32),
#[from(skip)]
Skipped(&'static T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: 'static> {
Variant {
field: &'static i32,
},
#[from(skip)]
Skipped {
field: &'static T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<i32>(&1), (&1).into());
assert_eq!(
Struct::Variant::<i32> { field: &1 },
(&1).into()
);
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T: Clone> {
Variant(i32),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<T: Clone> {
Variant {
field: i32,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<i32>(1), 1.into());
assert_eq!(Struct::Variant::<i32> { field: 1 }, 1.into());
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<T, const N: usize> {
Variant(i32),
#[from(skip)]
Skipped(T),
}
#[derive(Debug, From, PartialEq)]
enum Struct<const N: usize, T> {
Variant {
field: i32,
},
#[from(skip)]
Skipped {
field: T,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<i32, 1>(1), 1.into());
assert_eq!(
Struct::Variant::<1, i32> { field: 1 },
1.into()
);
}
}
}
}
}
mod types {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
#[from(i8)]
Unnamed(i16),
#[from(i16)]
Named {
field: i32,
},
AutomaticallySkipped(i32),
}
#[test]
fn assert() {
assert_not_impl_any!(Enum: From<i32>);
assert_eq!(Enum::Unnamed(1), 1_i8.into());
assert_eq!(Enum::Named { field: 1 }, 1_i16.into());
}
}
mod forward {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unnamed {
#[from(forward)]
Variant(i32),
AutomaticallyIgnored(i32),
}
#[derive(Debug, From, PartialEq)]
enum Named {
#[from(forward)]
Variant {
field: i32,
},
AutomaticallyIgnored {
field: i32,
},
}
#[test]
fn assert() {
assert_eq!(Unnamed::Variant(1), 1_i8.into());
assert_eq!(Unnamed::Variant(1), 1_i16.into());
assert_eq!(Unnamed::Variant(1), 1_i32.into());
assert_eq!(Named::Variant { field: 1 }, 1_i8.into());
assert_eq!(Named::Variant { field: 1 }, 1_i16.into());
assert_eq!(Named::Variant { field: 1 }, 1_i32.into());
}
}
}
mod multi_field_variant {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
Tuple(i8, i8),
Struct { field1: i16, field2: i16 },
}
#[test]
fn assert() {
assert_eq!(Enum::Tuple(0, 1), (0_i8, 1_i8).into());
assert_eq!(
Enum::Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A, B> {
Variant(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B> {
Variant { field1: A, field2: B },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1, 2_i16), (1, 2_i16).into());
assert_eq!(
Struct::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, A, B> {
Variant(&'a A, &'a B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, A, B> {
Variant { field1: &'a A, field2: &'a B },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1, &2_i16), (&1, &2_i16).into());
assert_eq!(
Struct::Variant {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: 'static, B: 'static> {
Variant(&'static A, &'static B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A: 'static, B: 'static> {
Variant {
field1: &'static A,
field2: &'static B,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1, &2_i16), (&1, &2_i16).into());
assert_eq!(
Struct::Variant {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: Clone, B> {
Variant(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B: Clone> {
Variant { field1: A, field2: B },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1, 2_i16), (1, 2_i16).into());
assert_eq!(
Struct::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<const N: usize, A, B> {
Variant(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, const N: usize, B> {
Variant { field1: A, field2: B },
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant::<0, _, _>(1, 2_i16), (1, 2_i16).into());
assert_eq!(
Struct::<_, 1, _>::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
}
mod from {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple {
#[from]
Variant(i8, i16),
AutomaticallySkipped(i8, i16),
}
#[derive(Debug, From, PartialEq)]
enum Struct {
#[from]
Variant {
field1: i8,
field2: i16,
},
AutomaticallySkipped {
field1: i8,
field2: i16,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1, 2), (1_i8, 2_i16).into());
assert_eq!(
Struct::Variant {
field1: 1,
field2: 2,
},
(1_i8, 2_i16).into(),
);
}
}
mod skip {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
Tuple(i8, i8),
#[from(skip)]
TupleSkipped(i8, i8),
Struct {
field1: i16,
field2: i16,
},
#[from(skip)]
StructSkipped {
field1: i16,
field2: i16,
},
}
#[test]
fn assert() {
assert_eq!(Enum::Tuple(0, 1), (0_i8, 1_i8).into());
assert_eq!(
Enum::Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
}
mod generic {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A, B> {
Variant(A, B),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B> {
Variant {
field1: A,
field2: B,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1, 2_i16), (1, 2_i16).into());
assert_eq!(
Struct::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, A, B> {
Variant(&'a A, &'a B),
#[from(skip)]
Skipped(&'a A, &'a B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, A, B> {
Variant {
field1: &'a A,
field2: &'a B,
},
#[from(skip)]
Skipped {
field1: &'a A,
field2: &'a B,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1, &2_i16), (&1, &2_i16).into());
assert_eq!(
Struct::Variant {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: 'static, B: 'static> {
Variant(&'static A, &'static B),
#[from(skip)]
Skipped(&'static A, &'static B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A: 'static, B: 'static> {
Variant {
field1: &'static A,
field2: &'static B,
},
#[from(skip)]
Skipped {
field1: &'static A,
field2: &'static B,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(&1, &2_i16), (&1, &2_i16).into());
assert_eq!(
Struct::Variant {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: Clone, B> {
Variant(A, B),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B: Clone> {
Variant {
field1: A,
field2: B,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(Tuple::Variant(1, 2_i16), (1, 2_i16).into());
assert_eq!(
Struct::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<const N: usize, A, B> {
Variant(A, B),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, const N: usize, B> {
Variant {
field1: A,
field2: B,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<0, _, _>(1, 2_i16),
(1, 2_i16).into()
);
assert_eq!(
Struct::<_, 1, _>::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
mod concrete {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A, B> {
Variant(i32, i16),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B> {
Variant {
field1: i32,
field2: i16,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<i32, i16>(1, 2_i16),
(1, 2_i16).into(),
);
assert_eq!(
Struct::Variant::<i32, i16> {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
mod reference {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<'a, A, B> {
Variant(&'a i32, &'a i16),
#[from(skip)]
Skipped(&'a A, &'a B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<'a, A, B> {
Variant {
field1: &'a i32,
field2: &'a i16,
},
#[from(skip)]
Skipped {
field1: &'a A,
field2: &'a B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<i32, i16>(&1, &2_i16),
(&1, &2_i16).into(),
);
assert_eq!(
Struct::Variant::<i32, i16> {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod indirect {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: 'static, B: 'static> {
Variant(&'static i32, &'static i16),
#[from(skip)]
Skipped(&'static A, &'static B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A: 'static, B: 'static> {
Variant {
field1: &'static i32,
field2: &'static i16,
},
#[from(skip)]
Skipped {
field1: &'static A,
field2: &'static B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<i32, i16>(&1, &2_i16),
(&1, &2_i16).into(),
);
assert_eq!(
Struct::Variant::<i32, i16> {
field1: &1,
field2: &2_i16,
},
(&1, &2_i16).into(),
);
}
}
mod bounded {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<A: Clone, B> {
Variant(i32, i16),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, B: Clone> {
Variant {
field1: i32,
field2: i16,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<i32, i16>(1, 2_i16),
(1, 2_i16).into(),
);
assert_eq!(
Struct::Variant::<i32, i16> {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
mod r#const {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Tuple<const N: usize, A, B> {
Variant(i32, i16),
#[from(skip)]
Skipped(A, B),
}
#[derive(Debug, From, PartialEq)]
enum Struct<A, const N: usize, B> {
Variant {
field1: i32,
field2: i16,
},
#[from(skip)]
Skipped {
field1: A,
field2: B,
},
}
#[test]
fn assert() {
assert_eq!(
Tuple::Variant::<0, i32, i16>(1, 2_i16),
(1, 2_i16).into()
);
assert_eq!(
Struct::<i32, 1, i16>::Variant {
field1: 1,
field2: 2_i16,
},
(1, 2_i16).into(),
);
}
}
}
}
}
mod types {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Enum {
#[from((i8, i8))]
Tuple(i16, i16),
#[from((i16, i16))]
Struct {
field1: i32,
field2: i32,
},
AutomaticallySkipped {
field1: i32,
field2: i32,
},
}
#[test]
fn assert() {
assert_not_impl_any!(Enum: From<(i32, i32)>);
assert_eq!(Enum::Tuple(0, 1), (0_i8, 1_i8).into());
assert_eq!(
Enum::Struct {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
}
}
mod forward {
use super::*;
#[derive(Debug, From, PartialEq)]
enum Unnamed {
#[from(forward)]
Variant(i16, i16),
AutomaticallyIgnored(i16, i16),
}
#[derive(Debug, From, PartialEq)]
enum Named {
#[from(forward)]
Variant {
field1: i16,
field2: i16,
},
AutomaticallyIgnored {
field1: i16,
field2: i16,
},
}
#[test]
fn assert() {
assert_eq!(Unnamed::Variant(0, 1), (0_i8, 1_i8).into());
assert_eq!(Unnamed::Variant(0, 1), (0_i8, 1_i16).into());
assert_eq!(Unnamed::Variant(0, 1), (0_i16, 1_i8).into());
assert_eq!(Unnamed::Variant(0, 1), (0_i16, 1_i16).into());
assert_eq!(
Named::Variant {
field1: 0,
field2: 1
},
(0_i8, 1_i8).into(),
);
assert_eq!(
Named::Variant {
field1: 0,
field2: 1
},
(0_i8, 1_i16).into(),
);
assert_eq!(
Named::Variant {
field1: 0,
field2: 1
},
(0_i16, 1_i8).into(),
);
assert_eq!(
Named::Variant {
field1: 0,
field2: 1
},
(0_i16, 1_i16).into(),
);
}
}
}
}