rustc_type_ir/
ir_print.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
use std::fmt;

use crate::{
    AliasTerm, AliasTy, Binder, CoercePredicate, ExistentialProjection, ExistentialTraitRef, FnSig,
    HostEffectPredicate, Interner, NormalizesTo, OutlivesPredicate, ProjectionPredicate,
    SubtypePredicate, TraitPredicate, TraitRef,
};

pub trait IrPrint<T> {
    fn print(t: &T, fmt: &mut fmt::Formatter<'_>) -> fmt::Result;
    fn print_debug(t: &T, fmt: &mut fmt::Formatter<'_>) -> fmt::Result;
}

macro_rules! define_display_via_print {
    ($($ty:ident),+ $(,)?) => {
        $(
            impl<I: Interner> fmt::Display for $ty<I> {
                fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
                    <I as IrPrint<$ty<I>>>::print(self, fmt)
                }
            }
        )*
    }
}

impl<I: Interner, T> fmt::Display for Binder<I, T>
where
    I: IrPrint<Binder<I, T>>,
{
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        <I as IrPrint<Binder<I, T>>>::print(self, fmt)
    }
}

macro_rules! define_debug_via_print {
    ($($ty:ident),+ $(,)?) => {
        $(
            impl<I: Interner> fmt::Debug for $ty<I> {
                fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
                    <I as IrPrint<$ty<I>>>::print_debug(self, fmt)
                }
            }
        )*
    }
}

define_display_via_print!(
    TraitRef,
    TraitPredicate,
    ExistentialTraitRef,
    ExistentialProjection,
    ProjectionPredicate,
    NormalizesTo,
    SubtypePredicate,
    CoercePredicate,
    HostEffectPredicate,
    AliasTy,
    AliasTerm,
    FnSig,
);

define_debug_via_print!(TraitRef, ExistentialTraitRef, ExistentialProjection);

impl<I: Interner, T> fmt::Display for OutlivesPredicate<I, T>
where
    I: IrPrint<OutlivesPredicate<I, T>>,
{
    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
        <I as IrPrint<OutlivesPredicate<I, T>>>::print(self, fmt)
    }
}