1use std::num::IntErrorKind;
2
3use rustc_ast as ast;
4use rustc_errors::codes::*;
5use rustc_errors::{
6 Applicability, Diag, DiagArgValue, DiagCtxtHandle, Diagnostic, EmissionGuarantee, Level,
7};
8use rustc_feature::AttributeTemplate;
9use rustc_hir::AttrPath;
10use rustc_macros::{Diagnostic, LintDiagnostic, Subdiagnostic};
11use rustc_span::{Span, Symbol};
12
13use crate::fluent_generated as fluent;
14
15pub(crate) enum UnsupportedLiteralReason {
16 Generic,
17 CfgString,
18 CfgBoolean,
19}
20
21#[derive(Diagnostic)]
22#[diag(attr_parsing_expected_one_cfg_pattern, code = E0536)]
23pub(crate) struct ExpectedOneCfgPattern {
24 #[primary_span]
25 pub span: Span,
26}
27
28#[derive(Diagnostic)]
29#[diag(attr_parsing_invalid_predicate, code = E0537)]
30pub(crate) struct InvalidPredicate {
31 #[primary_span]
32 pub span: Span,
33
34 pub predicate: String,
35}
36
37pub(crate) struct UnknownMetaItem<'a> {
39 pub span: Span,
40 pub item: String,
41 pub expected: &'a [&'a str],
42}
43
44impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for UnknownMetaItem<'_> {
46 fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {
47 let expected = self.expected.iter().map(|name| format!("`{name}`")).collect::<Vec<_>>();
48 Diag::new(dcx, level, fluent::attr_parsing_unknown_meta_item)
49 .with_span(self.span)
50 .with_code(E0541)
51 .with_arg("item", self.item)
52 .with_arg("expected", expected.join(", "))
53 .with_span_label(self.span, fluent::attr_parsing_label)
54 }
55}
56
57#[derive(Diagnostic)]
58#[diag(attr_parsing_missing_since, code = E0542)]
59pub(crate) struct MissingSince {
60 #[primary_span]
61 pub span: Span,
62}
63
64#[derive(Diagnostic)]
65#[diag(attr_parsing_missing_note, code = E0543)]
66pub(crate) struct MissingNote {
67 #[primary_span]
68 pub span: Span,
69}
70
71#[derive(Diagnostic)]
72#[diag(attr_parsing_multiple_stability_levels, code = E0544)]
73pub(crate) struct MultipleStabilityLevels {
74 #[primary_span]
75 pub span: Span,
76}
77
78#[derive(Diagnostic)]
79#[diag(attr_parsing_invalid_issue_string, code = E0545)]
80pub(crate) struct InvalidIssueString {
81 #[primary_span]
82 pub span: Span,
83
84 #[subdiagnostic]
85 pub cause: Option<InvalidIssueStringCause>,
86}
87
88#[derive(Subdiagnostic)]
91pub(crate) enum InvalidIssueStringCause {
92 #[label(attr_parsing_must_not_be_zero)]
93 MustNotBeZero {
94 #[primary_span]
95 span: Span,
96 },
97
98 #[label(attr_parsing_empty)]
99 Empty {
100 #[primary_span]
101 span: Span,
102 },
103
104 #[label(attr_parsing_invalid_digit)]
105 InvalidDigit {
106 #[primary_span]
107 span: Span,
108 },
109
110 #[label(attr_parsing_pos_overflow)]
111 PosOverflow {
112 #[primary_span]
113 span: Span,
114 },
115
116 #[label(attr_parsing_neg_overflow)]
117 NegOverflow {
118 #[primary_span]
119 span: Span,
120 },
121}
122
123impl InvalidIssueStringCause {
124 pub(crate) fn from_int_error_kind(span: Span, kind: &IntErrorKind) -> Option<Self> {
125 match kind {
126 IntErrorKind::Empty => Some(Self::Empty { span }),
127 IntErrorKind::InvalidDigit => Some(Self::InvalidDigit { span }),
128 IntErrorKind::PosOverflow => Some(Self::PosOverflow { span }),
129 IntErrorKind::NegOverflow => Some(Self::NegOverflow { span }),
130 IntErrorKind::Zero => Some(Self::MustNotBeZero { span }),
131 _ => None,
132 }
133 }
134}
135
136#[derive(Diagnostic)]
137#[diag(attr_parsing_missing_feature, code = E0546)]
138pub(crate) struct MissingFeature {
139 #[primary_span]
140 pub span: Span,
141}
142
143#[derive(Diagnostic)]
144#[diag(attr_parsing_non_ident_feature, code = E0546)]
145pub(crate) struct NonIdentFeature {
146 #[primary_span]
147 pub span: Span,
148}
149
150#[derive(Diagnostic)]
151#[diag(attr_parsing_missing_issue, code = E0547)]
152pub(crate) struct MissingIssue {
153 #[primary_span]
154 pub span: Span,
155}
156
157#[derive(Diagnostic)]
160#[diag(attr_parsing_incorrect_repr_format_packed_one_or_zero_arg, code = E0552)]
161pub(crate) struct IncorrectReprFormatPackedOneOrZeroArg {
162 #[primary_span]
163 pub span: Span,
164}
165#[derive(Diagnostic)]
166#[diag(attr_parsing_incorrect_repr_format_packed_expect_integer, code = E0552)]
167pub(crate) struct IncorrectReprFormatPackedExpectInteger {
168 #[primary_span]
169 pub span: Span,
170}
171
172#[derive(Diagnostic)]
173#[diag(attr_parsing_invalid_repr_hint_no_paren, code = E0552)]
174pub(crate) struct InvalidReprHintNoParen {
175 #[primary_span]
176 pub span: Span,
177
178 pub name: Symbol,
179}
180
181#[derive(Diagnostic)]
182#[diag(attr_parsing_invalid_repr_hint_no_value, code = E0552)]
183pub(crate) struct InvalidReprHintNoValue {
184 #[primary_span]
185 pub span: Span,
186
187 pub name: Symbol,
188}
189
190pub(crate) struct UnsupportedLiteral {
193 pub span: Span,
194 pub reason: UnsupportedLiteralReason,
195 pub is_bytestr: bool,
196 pub start_point_span: Span,
197}
198
199impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for UnsupportedLiteral {
200 fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {
201 let mut diag = Diag::new(
202 dcx,
203 level,
204 match self.reason {
205 UnsupportedLiteralReason::Generic => {
206 fluent::attr_parsing_unsupported_literal_generic
207 }
208 UnsupportedLiteralReason::CfgString => {
209 fluent::attr_parsing_unsupported_literal_cfg_string
210 }
211 UnsupportedLiteralReason::CfgBoolean => {
212 fluent::attr_parsing_unsupported_literal_cfg_boolean
213 }
214 },
215 );
216 diag.span(self.span);
217 diag.code(E0565);
218 if self.is_bytestr {
219 diag.span_suggestion(
220 self.start_point_span,
221 fluent::attr_parsing_unsupported_literal_suggestion,
222 "",
223 Applicability::MaybeIncorrect,
224 );
225 }
226 diag
227 }
228}
229
230#[derive(Diagnostic)]
231#[diag(attr_parsing_invalid_repr_align_need_arg, code = E0589)]
232pub(crate) struct InvalidReprAlignNeedArg {
233 #[primary_span]
234 #[suggestion(code = "align(...)", applicability = "has-placeholders")]
235 pub span: Span,
236}
237
238#[derive(Diagnostic)]
239#[diag(attr_parsing_invalid_repr_generic, code = E0589)]
240pub(crate) struct InvalidReprGeneric<'a> {
241 #[primary_span]
242 pub span: Span,
243
244 pub repr_arg: String,
245 pub error_part: &'a str,
246}
247
248#[derive(Diagnostic)]
249#[diag(attr_parsing_incorrect_repr_format_align_one_arg, code = E0693)]
250pub(crate) struct IncorrectReprFormatAlignOneArg {
251 #[primary_span]
252 pub span: Span,
253}
254
255#[derive(Diagnostic)]
256#[diag(attr_parsing_incorrect_repr_format_expect_literal_integer, code = E0693)]
257pub(crate) struct IncorrectReprFormatExpectInteger {
258 #[primary_span]
259 pub span: Span,
260}
261
262#[derive(Diagnostic)]
263#[diag(attr_parsing_incorrect_repr_format_generic, code = E0693)]
264pub(crate) struct IncorrectReprFormatGeneric {
265 #[primary_span]
266 pub span: Span,
267
268 pub repr_arg: Symbol,
269
270 #[subdiagnostic]
271 pub cause: Option<IncorrectReprFormatGenericCause>,
272}
273
274#[derive(Subdiagnostic)]
275pub(crate) enum IncorrectReprFormatGenericCause {
276 #[suggestion(
277 attr_parsing_suggestion,
278 code = "{name}({value})",
279 applicability = "machine-applicable"
280 )]
281 Int {
282 #[primary_span]
283 span: Span,
284
285 #[skip_arg]
286 name: Symbol,
287
288 #[skip_arg]
289 value: u128,
290 },
291
292 #[suggestion(
293 attr_parsing_suggestion,
294 code = "{name}({value})",
295 applicability = "machine-applicable"
296 )]
297 Symbol {
298 #[primary_span]
299 span: Span,
300
301 #[skip_arg]
302 name: Symbol,
303
304 #[skip_arg]
305 value: Symbol,
306 },
307}
308
309impl IncorrectReprFormatGenericCause {
310 pub(crate) fn from_lit_kind(span: Span, kind: &ast::LitKind, name: Symbol) -> Option<Self> {
311 match *kind {
312 ast::LitKind::Int(value, ast::LitIntType::Unsuffixed) => {
313 Some(Self::Int { span, name, value: value.get() })
314 }
315 ast::LitKind::Str(value, _) => Some(Self::Symbol { span, name, value }),
316 _ => None,
317 }
318 }
319}
320
321#[derive(Diagnostic)]
322#[diag(attr_parsing_rustc_promotable_pairing, code = E0717)]
323pub(crate) struct RustcPromotablePairing {
324 #[primary_span]
325 pub span: Span,
326}
327
328#[derive(Diagnostic)]
329#[diag(attr_parsing_rustc_allowed_unstable_pairing, code = E0789)]
330pub(crate) struct RustcAllowedUnstablePairing {
331 #[primary_span]
332 pub span: Span,
333}
334
335#[derive(Diagnostic)]
336#[diag(attr_parsing_cfg_predicate_identifier)]
337pub(crate) struct CfgPredicateIdentifier {
338 #[primary_span]
339 pub span: Span,
340}
341
342#[derive(Diagnostic)]
343#[diag(attr_parsing_deprecated_item_suggestion)]
344pub(crate) struct DeprecatedItemSuggestion {
345 #[primary_span]
346 pub span: Span,
347
348 #[help]
349 pub is_nightly: bool,
350
351 #[note]
352 pub details: (),
353}
354
355#[derive(Diagnostic)]
356#[diag(attr_parsing_expected_single_version_literal)]
357pub(crate) struct ExpectedSingleVersionLiteral {
358 #[primary_span]
359 pub span: Span,
360}
361
362#[derive(Diagnostic)]
363#[diag(attr_parsing_expected_version_literal)]
364pub(crate) struct ExpectedVersionLiteral {
365 #[primary_span]
366 pub span: Span,
367}
368
369#[derive(Diagnostic)]
370#[diag(attr_parsing_expects_feature_list)]
371pub(crate) struct ExpectsFeatureList {
372 #[primary_span]
373 pub span: Span,
374
375 pub name: String,
376}
377
378#[derive(Diagnostic)]
379#[diag(attr_parsing_expects_features)]
380pub(crate) struct ExpectsFeatures {
381 #[primary_span]
382 pub span: Span,
383
384 pub name: String,
385}
386
387#[derive(Diagnostic)]
388#[diag(attr_parsing_invalid_since)]
389pub(crate) struct InvalidSince {
390 #[primary_span]
391 pub span: Span,
392}
393
394#[derive(Diagnostic)]
395#[diag(attr_parsing_soft_no_args)]
396pub(crate) struct SoftNoArgs {
397 #[primary_span]
398 pub span: Span,
399}
400
401#[derive(Diagnostic)]
402#[diag(attr_parsing_unknown_version_literal)]
403pub(crate) struct UnknownVersionLiteral {
404 #[primary_span]
405 pub span: Span,
406}
407
408#[derive(Diagnostic)]
410#[diag(attr_parsing_unused_multiple)]
411pub(crate) struct UnusedMultiple {
412 #[primary_span]
413 #[suggestion(code = "", applicability = "machine-applicable")]
414 pub this: Span,
415 #[note]
416 pub other: Span,
417 pub name: Symbol,
418}
419
420#[derive(LintDiagnostic)]
421#[diag(attr_parsing_unused_duplicate)]
422pub(crate) struct UnusedDuplicate {
423 #[suggestion(code = "", applicability = "machine-applicable")]
424 pub this: Span,
425 #[note]
426 pub other: Span,
427 #[warning]
428 pub warning: bool,
429}
430
431#[derive(LintDiagnostic)]
433#[diag(attr_parsing_ill_formed_attribute_input)]
434pub(crate) struct IllFormedAttributeInput {
435 pub num_suggestions: usize,
436 pub suggestions: DiagArgValue,
437}
438
439#[derive(Diagnostic)]
440#[diag(attr_parsing_ill_formed_attribute_input)]
441pub(crate) struct MustUseIllFormedAttributeInput {
442 #[primary_span]
443 pub span: Span,
444 pub num_suggestions: usize,
445 pub suggestions: DiagArgValue,
446}
447
448#[derive(Diagnostic)]
449#[diag(attr_parsing_null_on_export, code = E0648)]
450pub(crate) struct NullOnExport {
451 #[primary_span]
452 pub span: Span,
453}
454
455#[derive(Diagnostic)]
456#[diag(attr_parsing_null_on_link_section, code = E0648)]
457pub(crate) struct NullOnLinkSection {
458 #[primary_span]
459 pub span: Span,
460}
461
462#[derive(Diagnostic)]
463#[diag(attr_parsing_stability_outside_std, code = E0734)]
464pub(crate) struct StabilityOutsideStd {
465 #[primary_span]
466 pub span: Span,
467}
468
469#[derive(Diagnostic)]
470#[diag(attr_parsing_empty_confusables)]
471pub(crate) struct EmptyConfusables {
472 #[primary_span]
473 pub span: Span,
474}
475
476#[derive(LintDiagnostic)]
477#[diag(attr_parsing_empty_attribute)]
478pub(crate) struct EmptyAttributeList {
479 #[suggestion(code = "", applicability = "machine-applicable")]
480 pub attr_span: Span,
481}
482
483#[derive(Diagnostic)]
484#[diag(attr_parsing_invalid_alignment_value, code = E0589)]
485pub(crate) struct InvalidAlignmentValue {
486 #[primary_span]
487 pub span: Span,
488 pub error_part: &'static str,
489}
490
491#[derive(Diagnostic)]
492#[diag(attr_parsing_repr_ident, code = E0565)]
493pub(crate) struct ReprIdent {
494 #[primary_span]
495 pub span: Span,
496}
497
498#[derive(Diagnostic)]
499#[diag(attr_parsing_unrecognized_repr_hint, code = E0552)]
500#[help]
501pub(crate) struct UnrecognizedReprHint {
502 #[primary_span]
503 pub span: Span,
504}
505
506#[derive(Diagnostic)]
507#[diag(attr_parsing_naked_functions_incompatible_attribute, code = E0736)]
508pub(crate) struct NakedFunctionIncompatibleAttribute {
509 #[primary_span]
510 #[label]
511 pub span: Span,
512 #[label(attr_parsing_naked_attribute)]
513 pub naked_span: Span,
514 pub attr: String,
515}
516
517pub(crate) enum AttributeParseErrorReason {
518 ExpectedNoArgs,
519 ExpectedStringLiteral { byte_string: Option<Span> },
520 ExpectedIntegerLiteral,
521 ExpectedAtLeastOneArgument,
522 ExpectedSingleArgument,
523 ExpectedList,
524 UnexpectedLiteral,
525 ExpectedNameValue(Option<Symbol>),
526 DuplicateKey(Symbol),
527 ExpectedSpecificArgument { possibilities: Vec<&'static str>, strings: bool },
528}
529
530pub(crate) struct AttributeParseError {
531 pub(crate) span: Span,
532 pub(crate) attr_span: Span,
533 pub(crate) template: AttributeTemplate,
534 pub(crate) attribute: AttrPath,
535 pub(crate) reason: AttributeParseErrorReason,
536}
537
538impl<'a, G: EmissionGuarantee> Diagnostic<'a, G> for AttributeParseError {
539 fn into_diag(self, dcx: DiagCtxtHandle<'a>, level: Level) -> Diag<'a, G> {
540 let name = self.attribute.to_string();
541
542 let mut diag = Diag::new(dcx, level, format!("malformed `{name}` attribute input"));
543 diag.span(self.attr_span);
544 diag.code(E0539);
545 match self.reason {
546 AttributeParseErrorReason::ExpectedStringLiteral { byte_string } => {
547 if let Some(start_point_span) = byte_string {
548 diag.span_suggestion(
549 start_point_span,
550 fluent::attr_parsing_unsupported_literal_suggestion,
551 "",
552 Applicability::MaybeIncorrect,
553 );
554 diag.note("expected a normal string literal, not a byte string literal");
555
556 return diag;
557 } else {
558 diag.span_label(self.span, "expected a string literal here");
559 }
560 }
561 AttributeParseErrorReason::ExpectedIntegerLiteral => {
562 diag.span_label(self.span, "expected an integer literal here");
563 }
564 AttributeParseErrorReason::ExpectedSingleArgument => {
565 diag.span_label(self.span, "expected a single argument here");
566 diag.code(E0805);
567 }
568 AttributeParseErrorReason::ExpectedAtLeastOneArgument => {
569 diag.span_label(self.span, "expected at least 1 argument here");
570 }
571 AttributeParseErrorReason::ExpectedList => {
572 diag.span_label(self.span, "expected this to be a list");
573 }
574 AttributeParseErrorReason::DuplicateKey(key) => {
575 diag.span_label(self.span, format!("found `{key}` used as a key more than once"));
576 diag.code(E0538);
577 }
578 AttributeParseErrorReason::UnexpectedLiteral => {
579 diag.span_label(self.span, format!("didn't expect a literal here"));
580 diag.code(E0565);
581 }
582 AttributeParseErrorReason::ExpectedNoArgs => {
583 diag.span_label(self.span, format!("didn't expect any arguments here"));
584 diag.code(E0565);
585 }
586 AttributeParseErrorReason::ExpectedNameValue(None) => {
587 }
589 AttributeParseErrorReason::ExpectedNameValue(Some(name)) => {
590 diag.span_label(
591 self.span,
592 format!("expected this to be of the form `{name} = \"...\"`"),
593 );
594 }
595 AttributeParseErrorReason::ExpectedSpecificArgument { possibilities, strings } => {
596 let quote = if strings { '"' } else { '`' };
597 match possibilities.as_slice() {
598 &[] => {}
599 &[x] => {
600 diag.span_label(
601 self.span,
602 format!("the only valid argument here is {quote}{x}{quote}"),
603 );
604 }
605 [first, second] => {
606 diag.span_label(self.span, format!("valid arguments are {quote}{first}{quote} or {quote}{second}{quote}"));
607 }
608 [first @ .., second_to_last, last] => {
609 let mut res = String::new();
610 for i in first {
611 res.push_str(&format!("{quote}{i}{quote}, "));
612 }
613 res.push_str(&format!(
614 "{quote}{second_to_last}{quote} or {quote}{last}{quote}"
615 ));
616
617 diag.span_label(self.span, format!("valid arguments are {res}"));
618 }
619 }
620 }
621 }
622
623 let suggestions = self.template.suggestions(false, &name);
624 diag.span_suggestions(
625 self.attr_span,
626 if suggestions.len() == 1 {
627 "must be of the form"
628 } else {
629 "try changing it to one of the following valid forms of the attribute"
630 },
631 suggestions,
632 Applicability::HasPlaceholders,
633 );
634
635 diag
636 }
637}