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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
use rustc_errors::{IntoDiagnosticArg, MultiSpan};
use rustc_macros::{LintDiagnostic, SessionDiagnostic, SessionSubdiagnostic};
use rustc_middle::ty::Ty;
use rustc_span::Span;

use crate::diagnostics::RegionName;

#[derive(SessionDiagnostic)]
#[diag(borrowck::move_unsized, code = "E0161")]
pub(crate) struct MoveUnsized<'tcx> {
    pub ty: Ty<'tcx>,
    #[primary_span]
    #[label]
    pub span: Span,
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::higher_ranked_lifetime_error)]
pub(crate) struct HigherRankedLifetimeError {
    #[subdiagnostic]
    pub cause: Option<HigherRankedErrorCause>,
    #[primary_span]
    pub span: Span,
}

#[derive(SessionSubdiagnostic)]
pub(crate) enum HigherRankedErrorCause {
    #[note(borrowck::could_not_prove)]
    CouldNotProve { predicate: String },
    #[note(borrowck::could_not_normalize)]
    CouldNotNormalize { value: String },
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::higher_ranked_subtype_error)]
pub(crate) struct HigherRankedSubtypeError {
    #[primary_span]
    pub span: Span,
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::generic_does_not_live_long_enough)]
pub(crate) struct GenericDoesNotLiveLongEnough {
    pub kind: String,
    #[primary_span]
    pub span: Span,
}

#[derive(LintDiagnostic)]
#[diag(borrowck::var_does_not_need_mut)]
pub(crate) struct VarNeedNotMut {
    #[suggestion_short(applicability = "machine-applicable", code = "")]
    pub span: Span,
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::const_not_used_in_type_alias)]
pub(crate) struct ConstNotUsedTraitAlias {
    pub ct: String,
    #[primary_span]
    pub span: Span,
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::var_cannot_escape_closure)]
#[note]
#[note(borrowck::cannot_escape)]
pub(crate) struct FnMutError {
    #[primary_span]
    pub span: Span,
    #[subdiagnostic]
    pub ty_err: FnMutReturnTypeErr,
}

#[derive(SessionSubdiagnostic)]
pub(crate) enum VarHereDenote {
    #[label(borrowck::var_here_captured)]
    Captured {
        #[primary_span]
        span: Span,
    },
    #[label(borrowck::var_here_defined)]
    Defined {
        #[primary_span]
        span: Span,
    },
    #[label(borrowck::closure_inferred_mut)]
    FnMutInferred {
        #[primary_span]
        span: Span,
    },
}

#[derive(SessionSubdiagnostic)]
pub(crate) enum FnMutReturnTypeErr {
    #[label(borrowck::returned_closure_escaped)]
    ReturnClosure {
        #[primary_span]
        span: Span,
    },
    #[label(borrowck::returned_async_block_escaped)]
    ReturnAsyncBlock {
        #[primary_span]
        span: Span,
    },
    #[label(borrowck::returned_ref_escaped)]
    ReturnRef {
        #[primary_span]
        span: Span,
    },
}

#[derive(SessionDiagnostic)]
#[diag(borrowck::lifetime_constraints_error)]
pub(crate) struct LifetimeOutliveErr {
    #[primary_span]
    pub span: Span,
}

#[derive(SessionSubdiagnostic)]
pub(crate) enum LifetimeReturnCategoryErr<'a> {
    #[label(borrowck::returned_lifetime_wrong)]
    WrongReturn {
        #[primary_span]
        span: Span,
        mir_def_name: &'a str,
        outlived_fr_name: RegionName,
        fr_name: &'a RegionName,
    },
    #[label(borrowck::returned_lifetime_short)]
    ShortReturn {
        #[primary_span]
        span: Span,
        category_desc: &'static str,
        free_region_name: &'a RegionName,
        outlived_fr_name: RegionName,
    },
}

impl IntoDiagnosticArg for &RegionName {
    fn into_diagnostic_arg(self) -> rustc_errors::DiagnosticArgValue<'static> {
        format!("{}", self).into_diagnostic_arg()
    }
}

impl IntoDiagnosticArg for RegionName {
    fn into_diagnostic_arg(self) -> rustc_errors::DiagnosticArgValue<'static> {
        format!("{}", self).into_diagnostic_arg()
    }
}

#[derive(SessionSubdiagnostic)]
pub(crate) enum RequireStaticErr {
    #[note(borrowck::used_impl_require_static)]
    UsedImpl {
        #[primary_span]
        multi_span: MultiSpan,
    },
}