rustc_middle/
error.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
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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
use std::path::{Path, PathBuf};
use std::{fmt, io};

use rustc_errors::codes::*;
use rustc_errors::{DiagArgName, DiagArgValue, DiagMessage};
use rustc_macros::{Diagnostic, Subdiagnostic};
use rustc_span::{Span, Symbol};

use crate::ty::Ty;

#[derive(Diagnostic)]
#[diag(middle_drop_check_overflow, code = E0320)]
#[note]
pub struct DropCheckOverflow<'tcx> {
    #[primary_span]
    pub span: Span,
    pub ty: Ty<'tcx>,
    pub overflow_ty: Ty<'tcx>,
}

#[derive(Diagnostic)]
#[diag(middle_failed_writing_file)]
pub struct FailedWritingFile<'a> {
    pub path: &'a Path,
    pub error: io::Error,
}

#[derive(Diagnostic)]
#[diag(middle_opaque_hidden_type_mismatch)]
pub struct OpaqueHiddenTypeMismatch<'tcx> {
    pub self_ty: Ty<'tcx>,
    pub other_ty: Ty<'tcx>,
    #[primary_span]
    #[label]
    pub other_span: Span,
    #[subdiagnostic]
    pub sub: TypeMismatchReason,
}

#[derive(Subdiagnostic)]
pub enum TypeMismatchReason {
    #[label(middle_conflict_types)]
    ConflictType {
        #[primary_span]
        span: Span,
    },
    #[note(middle_previous_use_here)]
    PreviousUse {
        #[primary_span]
        span: Span,
    },
}

#[derive(Diagnostic)]
#[diag(middle_limit_invalid)]
pub struct LimitInvalid<'a> {
    #[primary_span]
    pub span: Span,
    #[label]
    pub value_span: Span,
    pub error_str: &'a str,
}

#[derive(Diagnostic)]
#[diag(middle_recursion_limit_reached)]
#[help]
pub struct RecursionLimitReached<'tcx> {
    pub ty: Ty<'tcx>,
    pub suggested_limit: rustc_session::Limit,
}

#[derive(Diagnostic)]
#[diag(middle_const_eval_non_int)]
pub struct ConstEvalNonIntError {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(middle_strict_coherence_needs_negative_coherence)]
pub(crate) struct StrictCoherenceNeedsNegativeCoherence {
    #[primary_span]
    pub span: Span,
    #[label]
    pub attr_span: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(middle_requires_lang_item)]
pub(crate) struct RequiresLangItem {
    #[primary_span]
    pub span: Option<Span>,
    pub name: Symbol,
}

#[derive(Diagnostic)]
#[diag(middle_const_not_used_in_type_alias)]
pub(super) struct ConstNotUsedTraitAlias {
    pub ct: String,
    #[primary_span]
    pub span: Span,
}

pub struct CustomSubdiagnostic<'a> {
    pub msg: fn() -> DiagMessage,
    pub add_args: Box<dyn FnOnce(&mut dyn FnMut(DiagArgName, DiagArgValue)) + 'a>,
}

impl<'a> CustomSubdiagnostic<'a> {
    pub fn label(x: fn() -> DiagMessage) -> Self {
        Self::label_and_then(x, |_| {})
    }
    pub fn label_and_then<F: FnOnce(&mut dyn FnMut(DiagArgName, DiagArgValue)) + 'a>(
        msg: fn() -> DiagMessage,
        f: F,
    ) -> Self {
        Self { msg, add_args: Box::new(move |x| f(x)) }
    }
}

impl fmt::Debug for CustomSubdiagnostic<'_> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("CustomSubdiagnostic").finish_non_exhaustive()
    }
}

#[derive(Diagnostic)]
pub enum LayoutError<'tcx> {
    #[diag(middle_unknown_layout)]
    Unknown { ty: Ty<'tcx> },

    #[diag(middle_values_too_big)]
    Overflow { ty: Ty<'tcx> },

    #[diag(middle_cannot_be_normalized)]
    NormalizationFailure { ty: Ty<'tcx>, failure_ty: String },

    #[diag(middle_cycle)]
    Cycle,

    #[diag(middle_layout_references_error)]
    ReferencesError,
}

#[derive(Diagnostic)]
#[diag(middle_adjust_for_foreign_abi_error)]
pub struct UnsupportedFnAbi {
    pub arch: Symbol,
    pub abi: &'static str,
}

#[derive(Diagnostic)]
#[diag(middle_erroneous_constant)]
pub struct ErroneousConstant {
    #[primary_span]
    pub span: Span,
}

/// Used by `rustc_const_eval`
pub use crate::fluent_generated::middle_adjust_for_foreign_abi_error;

#[derive(Diagnostic)]
#[diag(middle_type_length_limit)]
#[help(middle_consider_type_length_limit)]
pub struct TypeLengthLimit {
    #[primary_span]
    pub span: Span,
    pub shrunk: String,
    #[note(middle_written_to_path)]
    pub was_written: bool,
    pub path: PathBuf,
    pub type_length: usize,
}