#![cfg_attr(not(feature = "std"), no_std)]
#![allow(dead_code, unused_imports)]
#[cfg(not(feature = "std"))]
extern crate alloc;
#[cfg(not(feature = "std"))]
use alloc::{
boxed::Box,
format,
string::{String, ToString},
vec::Vec,
};
use derive_more::{Binary, Display, Octal, UpperHex};
mod structs {
use super::*;
mod unit {
use super::*;
#[derive(Display)]
struct Unit;
#[derive(Display)]
struct Tuple();
#[derive(Display)]
struct Struct {}
#[test]
fn assert() {
assert_eq!(Unit.to_string(), "Unit");
assert_eq!(Tuple().to_string(), "Tuple");
assert_eq!(Struct {}.to_string(), "Struct");
}
mod str {
use super::*;
#[derive(Display)]
#[display("unit")]
pub struct Unit;
#[derive(Display)]
#[display("tuple")]
pub struct Tuple();
#[derive(Display)]
#[display("struct")]
pub struct Struct {}
#[test]
fn assert() {
assert_eq!(Unit.to_string(), "unit");
assert_eq!(Tuple().to_string(), "tuple");
assert_eq!(Struct {}.to_string(), "struct");
}
}
mod interpolated {
use super::*;
#[derive(Display)]
#[display("unit: {}", 0)]
pub struct Unit;
#[derive(Display)]
#[display("tuple: {}", 0)]
pub struct Tuple();
#[derive(Display)]
#[display("struct: {}", 0)]
pub struct Struct {}
#[test]
fn assert() {
assert_eq!(Unit.to_string(), "unit: 0");
assert_eq!(Tuple().to_string(), "tuple: 0");
assert_eq!(Struct {}.to_string(), "struct: 0");
}
}
}
mod single_field {
use super::*;
#[derive(Display)]
struct Tuple(i32);
#[derive(Binary)]
struct Binary(i32);
#[derive(Display)]
struct Struct {
field: i32,
}
#[derive(Octal)]
struct Octal {
field: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(0).to_string(), "0");
assert_eq!(format!("{:b}", Binary(10)), "1010");
assert_eq!(Struct { field: 0 }.to_string(), "0");
assert_eq!(format!("{:o}", Octal { field: 10 }).to_string(), "12");
}
mod str {
use super::*;
#[derive(Display)]
#[display("tuple")]
struct Tuple(i32);
#[derive(Display)]
#[display("struct")]
struct Struct {
field: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(0).to_string(), "tuple");
assert_eq!(Struct { field: 0 }.to_string(), "struct");
}
}
mod interpolated {
use super::*;
#[derive(Display)]
#[display("tuple: {_0} {}", _0)]
struct Tuple(i32);
#[derive(Display)]
#[display("struct: {field} {}", field)]
struct Struct {
field: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(0).to_string(), "tuple: 0 0");
assert_eq!(Struct { field: 0 }.to_string(), "struct: 0 0");
}
}
}
mod multi_field {
use super::*;
mod str {
use super::*;
#[derive(Display)]
#[display("tuple")]
struct Tuple(i32, i32);
#[derive(Display)]
#[display("struct")]
struct Struct {
field1: i32,
field2: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(1, 2).to_string(), "tuple");
assert_eq!(
Struct {
field1: 1,
field2: 2,
}
.to_string(),
"struct",
);
}
}
mod interpolated {
use super::*;
#[derive(Display)]
#[display(
"{_0} {ident} {_1} {} {}",
_1, _0 + _1, ident = 123, _1 = _0,
)]
struct Tuple(i32, i32);
#[derive(Display)]
#[display(
"{field1} {ident} {field2} {} {}",
field2, field1 + field2, ident = 123, field2 = field1,
)]
struct Struct {
field1: i32,
field2: i32,
}
#[test]
fn assert() {
assert_eq!(Tuple(1, 2).to_string(), "1 123 1 2 3");
assert_eq!(
Struct {
field1: 1,
field2: 2,
}
.to_string(),
"1 123 1 2 3",
);
}
}
}
}
mod enums {
use super::*;
mod no_variants {
use super::*;
#[derive(Display)]
enum Void {}
const fn assert<T: Display>() {}
const _: () = assert::<Void>();
}
mod unit_variant {
use super::*;
#[derive(Display)]
enum Enum {
Unit,
Unnamed(),
Named {},
#[display("STR_UNIT")]
StrUnit,
#[display("STR_UNNAMED")]
StrUnnamed(),
#[display("STR_NAMED")]
StrNamed {},
}
#[test]
fn assert() {
assert_eq!(Enum::Unit.to_string(), "Unit");
assert_eq!(Enum::Unnamed().to_string(), "Unnamed");
assert_eq!(Enum::Named {}.to_string(), "Named");
assert_eq!(Enum::StrUnit.to_string(), "STR_UNIT");
assert_eq!(Enum::StrUnnamed().to_string(), "STR_UNNAMED");
assert_eq!(Enum::StrNamed {}.to_string(), "STR_NAMED");
}
}
mod single_field_variant {
use super::*;
#[derive(Display)]
enum Enum {
Unnamed(i32),
Named {
field: i32,
},
#[display("unnamed")]
StrUnnamed(i32),
#[display("named")]
StrNamed {
field: i32,
},
#[display("{_0} {}", _0)]
InterpolatedUnnamed(i32),
#[display("{field} {}", field)]
InterpolatedNamed {
field: i32,
},
}
#[test]
fn assert() {
assert_eq!(Enum::Unnamed(1).to_string(), "1");
assert_eq!(Enum::Named { field: 1 }.to_string(), "1");
assert_eq!(Enum::StrUnnamed(1).to_string(), "unnamed");
assert_eq!(Enum::StrNamed { field: 1 }.to_string(), "named");
assert_eq!(Enum::InterpolatedUnnamed(1).to_string(), "1 1");
assert_eq!(Enum::InterpolatedNamed { field: 1 }.to_string(), "1 1");
}
}
mod multi_field_variant {
use super::*;
#[derive(Display)]
enum Enum {
#[display("unnamed")]
StrUnnamed(i32, i32),
#[display("named")]
StrNamed { field1: i32, field2: i32 },
#[display(
"{_0} {ident} {_1} {} {}",
_1, _0 + _1, ident = 123, _1 = _0,
)]
InterpolatedUnnamed(i32, i32),
#[display(
"{field1} {ident} {field2} {} {}",
field2, field1 + field2, ident = 123, field2 = field1,
)]
InterpolatedNamed { field1: i32, field2: i32 },
}
#[test]
fn assert() {
assert_eq!(Enum::StrUnnamed(1, 2).to_string(), "unnamed");
assert_eq!(
Enum::StrNamed {
field1: 1,
field2: 2,
}
.to_string(),
"named",
);
assert_eq!(Enum::InterpolatedUnnamed(1, 2).to_string(), "1 123 1 2 3");
assert_eq!(
Enum::InterpolatedNamed {
field1: 1,
field2: 2,
}
.to_string(),
"1 123 1 2 3",
);
}
}
}
mod generic {
use super::*;
trait Bound {}
impl Bound for () {}
fn display_bound<T: Bound>(_: &T) -> &'static str {
"()"
}
#[derive(Display)]
#[display("Generic {}", field)]
struct NamedGenericStruct<T> {
field: T,
}
#[test]
fn named_generic_struct() {
assert_eq!(NamedGenericStruct { field: 1 }.to_string(), "Generic 1");
}
#[derive(Display)]
#[display("Generic {field}")]
struct InterpolatedNamedGenericStruct<T> {
field: T,
}
#[test]
fn interpolated_named_generic_struct() {
assert_eq!(
InterpolatedNamedGenericStruct { field: 1 }.to_string(),
"Generic 1",
);
}
#[derive(Display)]
#[display("Generic {field:<>width$.prec$} {field}")]
struct InterpolatedNamedGenericStructWidthPrecision<T> {
field: T,
width: usize,
prec: usize,
}
#[test]
fn interpolated_named_generic_struct_width_precision() {
assert_eq!(
InterpolatedNamedGenericStructWidthPrecision {
field: 1.2345,
width: 9,
prec: 2,
}
.to_string(),
"Generic <<<<<1.23 1.2345",
);
}
#[derive(Display)]
struct AutoNamedGenericStruct<T> {
field: T,
}
#[test]
fn auto_named_generic_struct() {
assert_eq!(AutoNamedGenericStruct { field: 1 }.to_string(), "1");
}
#[derive(Display)]
#[display("{alias}", alias = field)]
struct AliasedNamedGenericStruct<T> {
field: T,
}
#[test]
fn aliased_named_generic_struct() {
assert_eq!(AliasedNamedGenericStruct { field: 1 }.to_string(), "1");
}
#[derive(Display)]
#[display("{field1}", field1 = field2)]
struct AliasedFieldNamedGenericStruct<T> {
field1: T,
field2: i32,
}
#[test]
fn aliased_field_named_generic_struct() {
assert_eq!(
AliasedFieldNamedGenericStruct {
field1: (),
field2: 1,
}
.to_string(),
"1",
);
}
#[derive(Display)]
#[display("Generic {}", _0)]
struct UnnamedGenericStruct<T>(T);
#[test]
fn unnamed_generic_struct() {
assert_eq!(UnnamedGenericStruct(2).to_string(), "Generic 2");
}
#[derive(Display)]
#[display("Generic {_0}")]
struct InterpolatedUnnamedGenericStruct<T>(T);
#[test]
fn interpolated_unnamed_generic_struct() {
assert_eq!(InterpolatedUnnamedGenericStruct(2).to_string(), "Generic 2");
}
#[derive(Display)]
struct AutoUnnamedGenericStruct<T>(T);
#[test]
fn auto_unnamed_generic_struct() {
assert_eq!(AutoUnnamedGenericStruct(2).to_string(), "2");
}
#[derive(Display)]
#[display("{alias}", alias = _0)]
struct AliasedUnnamedGenericStruct<T>(T);
#[test]
fn aliased_unnamed_generic_struct() {
assert_eq!(AliasedUnnamedGenericStruct(2).to_string(), "2");
}
#[derive(Display)]
#[display("{_0}", _0 = _1)]
struct AliasedFieldUnnamedGenericStruct<T>(T, i32);
#[test]
fn aliased_field_unnamed_generic_struct() {
assert_eq!(AliasedFieldUnnamedGenericStruct((), 2).to_string(), "2");
}
#[derive(Display)]
enum GenericEnum<A, B> {
#[display("Gen::A {}", field)]
A { field: A },
#[display("Gen::B {}", _0)]
B(B),
}
#[test]
fn generic_enum() {
assert_eq!(GenericEnum::A::<_, u8> { field: 1 }.to_string(), "Gen::A 1");
assert_eq!(GenericEnum::B::<u8, _>(2).to_string(), "Gen::B 2");
}
#[derive(Display)]
enum InterpolatedGenericEnum<A, B> {
#[display("Gen::A {field}")]
A { field: A },
#[display("Gen::B {_0}")]
B(B),
}
#[test]
fn interpolated_generic_enum() {
assert_eq!(
InterpolatedGenericEnum::A::<_, u8> { field: 1 }.to_string(),
"Gen::A 1",
);
assert_eq!(
InterpolatedGenericEnum::B::<u8, _>(2).to_string(),
"Gen::B 2",
);
}
#[derive(Display)]
enum AutoGenericEnum<A, B> {
A { field: A },
B(B),
}
#[test]
fn auto_generic_enum() {
assert_eq!(AutoGenericEnum::A::<_, u8> { field: 1 }.to_string(), "1");
assert_eq!(AutoGenericEnum::B::<u8, _>(2).to_string(), "2");
}
#[derive(Display)]
#[display("{} {} <-> {0:o} {1:#x} <-> {0:?} {1:X?}", a, b)]
struct MultiTraitNamedGenericStruct<A, B> {
a: A,
b: B,
}
#[test]
fn multi_trait_named_generic_struct() {
let s = MultiTraitNamedGenericStruct { a: 8u8, b: 255 };
assert_eq!(s.to_string(), "8 255 <-> 10 0xff <-> 8 FF");
}
#[derive(Display)]
#[display("{} {b} <-> {0:o} {1:#x} <-> {0:?} {1:X?}", a, b)]
struct InterpolatedMultiTraitNamedGenericStruct<A, B> {
a: A,
b: B,
}
#[test]
fn interpolated_multi_trait_named_generic_struct() {
let s = InterpolatedMultiTraitNamedGenericStruct { a: 8u8, b: 255 };
assert_eq!(s.to_string(), "8 255 <-> 10 0xff <-> 8 FF");
}
#[derive(Display)]
#[display("{} {} {{}} {0:o} {1:#x} - {0:>4?} {1:^4X?}", _0, _1)]
struct MultiTraitUnnamedGenericStruct<A, B>(A, B);
#[test]
fn multi_trait_unnamed_generic_struct() {
let s = MultiTraitUnnamedGenericStruct(8u8, 255);
assert_eq!(s.to_string(), "8 255 {} 10 0xff - 8 FF ");
}
#[derive(Display)]
#[display("{} {_1} {{}} {0:o} {1:#x} - {0:>4?} {1:^4X?}", _0, _1)]
struct InterpolatedMultiTraitUnnamedGenericStruct<A, B>(A, B);
#[test]
fn interpolated_multi_trait_unnamed_generic_struct() {
let s = InterpolatedMultiTraitUnnamedGenericStruct(8u8, 255);
assert_eq!(s.to_string(), "8 255 {} 10 0xff - 8 FF ");
}
#[derive(Display)]
#[display("{}", 3 * 4)]
struct UnusedGenericStruct<T>(T);
#[test]
fn unused_generic_struct() {
let s = UnusedGenericStruct(());
assert_eq!(s.to_string(), "12");
}
mod associated_type_field_enumerator {
use super::*;
trait Trait {
type Type;
}
struct Struct;
impl Trait for Struct {
type Type = i32;
}
#[test]
fn auto_generic_named_struct_associated() {
#[derive(Display)]
struct AutoGenericNamedStructAssociated<T: Trait> {
field: <T as Trait>::Type,
}
let s = AutoGenericNamedStructAssociated::<Struct> { field: 10 };
assert_eq!(s.to_string(), "10");
}
#[test]
fn auto_generic_unnamed_struct_associated() {
#[derive(Display)]
struct AutoGenericUnnamedStructAssociated<T: Trait>(<T as Trait>::Type);
let s = AutoGenericUnnamedStructAssociated::<Struct>(10);
assert_eq!(s.to_string(), "10");
}
#[test]
fn auto_generic_enum_associated() {
#[derive(Display)]
enum AutoGenericEnumAssociated<T: Trait> {
Enumerator(<T as Trait>::Type),
}
let e = AutoGenericEnumAssociated::<Struct>::Enumerator(10);
assert_eq!(e.to_string(), "10");
}
}
mod complex_type_field_enumerator {
use super::*;
#[derive(Display)]
struct Struct<T>(T);
#[test]
fn auto_generic_named_struct_complex() {
#[derive(Display)]
struct AutoGenericNamedStructComplex<T> {
field: Struct<T>,
}
let s = AutoGenericNamedStructComplex { field: Struct(10) };
assert_eq!(s.to_string(), "10");
}
#[test]
fn auto_generic_unnamed_struct_complex() {
#[derive(Display)]
struct AutoGenericUnnamedStructComplex<T>(Struct<T>);
let s = AutoGenericUnnamedStructComplex(Struct(10));
assert_eq!(s.to_string(), "10");
}
#[test]
fn auto_generic_enum_complex() {
#[derive(Display)]
enum AutoGenericEnumComplex<T> {
Enumerator(Struct<T>),
}
let e = AutoGenericEnumComplex::Enumerator(Struct(10));
assert_eq!(e.to_string(), "10")
}
}
mod reference {
use super::*;
#[test]
fn auto_generic_reference() {
#[derive(Display)]
struct AutoGenericReference<'a, T>(&'a T);
let s = AutoGenericReference(&10);
assert_eq!(s.to_string(), "10");
}
#[test]
fn auto_generic_static_reference() {
#[derive(Display)]
struct AutoGenericStaticReference<T: 'static>(&'static T);
let s = AutoGenericStaticReference(&10);
assert_eq!(s.to_string(), "10");
}
}
mod indirect {
use super::*;
#[derive(Display)]
struct Struct<T>(T);
#[test]
fn auto_generic_indirect() {
#[derive(Display)]
struct AutoGenericIndirect<T: 'static>(Struct<&'static T>);
const V: i32 = 10;
let s = AutoGenericIndirect(Struct(&V));
assert_eq!(s.to_string(), "10");
}
}
mod bound {
use super::*;
#[test]
fn simple() {
#[derive(Display)]
#[display("{} {}", _0, _1)]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "10 20");
}
#[test]
fn underscored_simple() {
#[derive(Display)]
#[display("{_0} {_1}")]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "10 20");
}
#[test]
fn redundant() {
#[derive(Display)]
#[display(bound(T1: ::core::fmt::Display, T2: ::core::fmt::Display))]
#[display("{} {}", _0, _1)]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "10 20");
}
#[test]
fn underscored_redundant() {
#[derive(Display)]
#[display(bound(T1: ::core::fmt::Display, T2: ::core::fmt::Display))]
#[display("{_0} {_1}")]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "10 20");
}
#[test]
fn complex() {
trait Trait1 {
fn function1(&self) -> &'static str;
}
trait Trait2 {
fn function2(&self) -> &'static str;
}
impl Trait1 for i32 {
fn function1(&self) -> &'static str {
"WHAT"
}
}
impl Trait2 for i32 {
fn function2(&self) -> &'static str {
"EVER"
}
}
#[derive(Display)]
#[display(bound(T1: Trait1 + Trait2, T2: Trait1 + Trait2))]
#[display("{} {} {} {}", _0.function1(), _0, _1.function2(), _1)]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "WHAT 10 EVER 20");
}
#[test]
fn underscored_complex() {
trait Trait1 {
fn function1(&self) -> &'static str;
}
trait Trait2 {
fn function2(&self) -> &'static str;
}
impl Trait1 for i32 {
fn function1(&self) -> &'static str {
"WHAT"
}
}
impl Trait2 for i32 {
fn function2(&self) -> &'static str {
"EVER"
}
}
#[derive(Display)]
#[display(bound(T1: Trait1 + Trait2, T2: Trait1 + Trait2))]
#[display("{} {_0} {} {_1}", _0.function1(), _1.function2())]
struct Struct<T1, T2>(T1, T2);
let s = Struct(10, 20);
assert_eq!(s.to_string(), "WHAT 10 EVER 20");
}
}
}
