1 // Copyright 2012-2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
17 use syntax_pos::{MultiSpan, Span};
21 #[derive(Clone, Debug, PartialEq, Hash, RustcEncodable, RustcDecodable)]
22 pub struct Diagnostic {
24 pub message: Vec<(String, Style)>,
25 pub code: Option<DiagnosticId>,
27 pub children: Vec<SubDiagnostic>,
28 pub suggestions: Vec<CodeSuggestion>,
31 #[derive(Clone, Debug, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)]
32 pub enum DiagnosticId {
37 /// For example a note attached to an error.
38 #[derive(Clone, Debug, PartialEq, Hash, RustcEncodable, RustcDecodable)]
39 pub struct SubDiagnostic {
41 pub message: Vec<(String, Style)>,
43 pub render_span: Option<MultiSpan>,
46 #[derive(PartialEq, Eq)]
47 pub struct DiagnosticStyledString(pub Vec<StringPart>);
49 impl DiagnosticStyledString {
50 pub fn new() -> DiagnosticStyledString {
51 DiagnosticStyledString(vec![])
53 pub fn push_normal<S: Into<String>>(&mut self, t: S) {
54 self.0.push(StringPart::Normal(t.into()));
56 pub fn push_highlighted<S: Into<String>>(&mut self, t: S) {
57 self.0.push(StringPart::Highlighted(t.into()));
59 pub fn normal<S: Into<String>>(t: S) -> DiagnosticStyledString {
60 DiagnosticStyledString(vec![StringPart::Normal(t.into())])
63 pub fn highlighted<S: Into<String>>(t: S) -> DiagnosticStyledString {
64 DiagnosticStyledString(vec![StringPart::Highlighted(t.into())])
67 pub fn content(&self) -> String {
68 self.0.iter().map(|x| x.content()).collect::<String>()
72 #[derive(PartialEq, Eq)]
79 pub fn content(&self) -> String {
81 &StringPart::Normal(ref s) | & StringPart::Highlighted(ref s) => s.to_owned()
87 pub fn new(level: Level, message: &str) -> Self {
88 Diagnostic::new_with_code(level, None, message)
91 pub fn new_with_code(level: Level, code: Option<DiagnosticId>, message: &str) -> Self {
94 message: vec![(message.to_owned(), Style::NoStyle)],
96 span: MultiSpan::new(),
102 /// Cancel the diagnostic (a structured diagnostic must either be emitted or
103 /// canceled or it will panic when dropped).
104 pub fn cancel(&mut self) {
105 self.level = Level::Cancelled;
108 pub fn cancelled(&self) -> bool {
109 self.level == Level::Cancelled
112 /// Add a span/label to be included in the resulting snippet.
113 /// This is pushed onto the `MultiSpan` that was created when the
114 /// diagnostic was first built. If you don't call this function at
115 /// all, and you just supplied a `Span` to create the diagnostic,
116 /// then the snippet will just include that `Span`, which is
117 /// called the primary span.
118 pub fn span_label<T: Into<String>>(&mut self, span: Span, label: T) -> &mut Self {
119 self.span.push_span_label(span, label.into());
123 pub fn note_expected_found(&mut self,
124 label: &fmt::Display,
125 expected: DiagnosticStyledString,
126 found: DiagnosticStyledString)
129 self.note_expected_found_extra(label, expected, found, &"", &"")
132 pub fn note_expected_found_extra(&mut self,
133 label: &fmt::Display,
134 expected: DiagnosticStyledString,
135 found: DiagnosticStyledString,
136 expected_extra: &fmt::Display,
137 found_extra: &fmt::Display)
140 let mut msg: Vec<_> = vec![(format!("expected {} `", label), Style::NoStyle)];
141 msg.extend(expected.0.iter()
143 StringPart::Normal(ref s) => (s.to_owned(), Style::NoStyle),
144 StringPart::Highlighted(ref s) => (s.to_owned(), Style::Highlight),
146 msg.push((format!("`{}\n", expected_extra), Style::NoStyle));
147 msg.push((format!(" found {} `", label), Style::NoStyle));
148 msg.extend(found.0.iter()
150 StringPart::Normal(ref s) => (s.to_owned(), Style::NoStyle),
151 StringPart::Highlighted(ref s) => (s.to_owned(), Style::Highlight),
153 msg.push((format!("`{}", found_extra), Style::NoStyle));
155 // For now, just attach these as notes
156 self.highlighted_note(msg);
160 pub fn note_trait_signature(&mut self, name: String, signature: String) -> &mut Self {
161 self.highlighted_note(vec![
162 (format!("`{}` from trait: `", name), Style::NoStyle),
163 (signature, Style::Highlight),
164 ("`".to_string(), Style::NoStyle)]);
168 pub fn note(&mut self, msg: &str) -> &mut Self {
169 self.sub(Level::Note, msg, MultiSpan::new(), None);
173 pub fn highlighted_note(&mut self, msg: Vec<(String, Style)>) -> &mut Self {
174 self.sub_with_highlights(Level::Note, msg, MultiSpan::new(), None);
178 pub fn span_note<S: Into<MultiSpan>>(&mut self,
182 self.sub(Level::Note, msg, sp.into(), None);
186 pub fn warn(&mut self, msg: &str) -> &mut Self {
187 self.sub(Level::Warning, msg, MultiSpan::new(), None);
191 pub fn span_warn<S: Into<MultiSpan>>(&mut self,
195 self.sub(Level::Warning, msg, sp.into(), None);
199 pub fn help(&mut self , msg: &str) -> &mut Self {
200 self.sub(Level::Help, msg, MultiSpan::new(), None);
204 pub fn span_help<S: Into<MultiSpan>>(&mut self,
208 self.sub(Level::Help, msg, sp.into(), None);
212 /// Prints out a message with a suggested edit of the code. If the suggestion is presented
213 /// inline it will only show the text message and not the text.
215 /// See `CodeSuggestion` for more information.
216 pub fn span_suggestion_short(&mut self, sp: Span, msg: &str, suggestion: String) -> &mut Self {
217 self.suggestions.push(CodeSuggestion {
218 substitutions: vec![Substitution {
219 parts: vec![SubstitutionPart {
225 show_code_when_inline: false,
226 applicability: Applicability::Unspecified,
231 /// Prints out a message with a suggested edit of the code.
233 /// In case of short messages and a simple suggestion,
234 /// rustc displays it as a label like
236 /// "try adding parentheses: `(tup.0).1`"
240 /// * should not end in any punctuation (a `:` is added automatically)
241 /// * should not be a question
242 /// * should not contain any parts like "the following", "as shown"
243 /// * may look like "to do xyz, use" or "to do xyz, use abc"
244 /// * may contain a name of a function, variable or type, but not whole expressions
246 /// See `CodeSuggestion` for more information.
247 pub fn span_suggestion(&mut self, sp: Span, msg: &str, suggestion: String) -> &mut Self {
248 self.suggestions.push(CodeSuggestion {
249 substitutions: vec![Substitution {
250 parts: vec![SubstitutionPart {
256 show_code_when_inline: true,
257 applicability: Applicability::Unspecified,
262 pub fn multipart_suggestion(
265 suggestion: Vec<(Span, String)>,
267 self.suggestions.push(CodeSuggestion {
268 substitutions: vec![Substitution {
271 .map(|(span, snippet)| SubstitutionPart { snippet, span })
275 show_code_when_inline: true,
276 applicability: Applicability::Unspecified,
281 /// Prints out a message with multiple suggested edits of the code.
282 pub fn span_suggestions(&mut self, sp: Span, msg: &str, suggestions: Vec<String>) -> &mut Self {
283 self.suggestions.push(CodeSuggestion {
284 substitutions: suggestions.into_iter().map(|snippet| Substitution {
285 parts: vec![SubstitutionPart {
291 show_code_when_inline: true,
292 applicability: Applicability::Unspecified,
297 /// This is a suggestion that may contain mistakes or fillers and should
298 /// be read and understood by a human.
299 pub fn span_suggestion_with_applicability(&mut self, sp: Span, msg: &str,
301 applicability: Applicability) -> &mut Self {
302 self.suggestions.push(CodeSuggestion {
303 substitutions: vec![Substitution {
304 parts: vec![SubstitutionPart {
310 show_code_when_inline: true,
316 pub fn span_suggestions_with_applicability(&mut self, sp: Span, msg: &str,
317 suggestions: Vec<String>,
318 applicability: Applicability) -> &mut Self {
319 self.suggestions.push(CodeSuggestion {
320 substitutions: suggestions.into_iter().map(|snippet| Substitution {
321 parts: vec![SubstitutionPart {
327 show_code_when_inline: true,
333 pub fn span_suggestion_short_with_applicability(
334 &mut self, sp: Span, msg: &str, suggestion: String, applicability: Applicability
336 self.suggestions.push(CodeSuggestion {
337 substitutions: vec![Substitution {
338 parts: vec![SubstitutionPart {
344 show_code_when_inline: false,
345 applicability: applicability,
350 pub fn set_span<S: Into<MultiSpan>>(&mut self, sp: S) -> &mut Self {
351 self.span = sp.into();
355 pub fn code(&mut self, s: DiagnosticId) -> &mut Self {
360 pub fn get_code(&self) -> Option<DiagnosticId> {
364 pub fn message(&self) -> String {
365 self.message.iter().map(|i| i.0.to_owned()).collect::<String>()
368 pub fn styled_message(&self) -> &Vec<(String, Style)> {
372 /// Used by a lint. Copies over all details *but* the "main
374 pub fn copy_details_not_message(&mut self, from: &Diagnostic) {
375 self.span = from.span.clone();
376 self.code = from.code.clone();
377 self.children.extend(from.children.iter().cloned())
380 /// Convenience function for internal use, clients should use one of the
381 /// public methods above.
382 pub(crate) fn sub(&mut self,
386 render_span: Option<MultiSpan>) {
387 let sub = SubDiagnostic {
389 message: vec![(message.to_owned(), Style::NoStyle)],
393 self.children.push(sub);
396 /// Convenience function for internal use, clients should use one of the
397 /// public methods above.
398 fn sub_with_highlights(&mut self,
400 message: Vec<(String, Style)>,
402 render_span: Option<MultiSpan>) {
403 let sub = SubDiagnostic {
409 self.children.push(sub);
414 pub fn message(&self) -> String {
415 self.message.iter().map(|i| i.0.to_owned()).collect::<String>()
418 pub fn styled_message(&self) -> &Vec<(String, Style)> {