| use crate::CodeSuggestion; |
| use crate::SuggestionStyle; |
| use crate::SubstitutionPart; |
| use crate::Substitution; |
| use crate::Applicability; |
| use crate::Level; |
| use crate::snippet::Style; |
| use std::fmt; |
| use syntax_pos::{MultiSpan, Span}; |
| |
| #[must_use] |
| #[derive(Clone, Debug, PartialEq, Hash, RustcEncodable, RustcDecodable)] |
| pub struct Diagnostic { |
| pub level: Level, |
| pub message: Vec<(String, Style)>, |
| pub code: Option<DiagnosticId>, |
| pub span: MultiSpan, |
| pub children: Vec<SubDiagnostic>, |
| pub suggestions: Vec<CodeSuggestion>, |
| } |
| |
| #[derive(Clone, Debug, PartialEq, Eq, Hash, RustcEncodable, RustcDecodable)] |
| pub enum DiagnosticId { |
| Error(String), |
| Lint(String), |
| } |
| |
| /// For example a note attached to an error. |
| #[derive(Clone, Debug, PartialEq, Hash, RustcEncodable, RustcDecodable)] |
| pub struct SubDiagnostic { |
| pub level: Level, |
| pub message: Vec<(String, Style)>, |
| pub span: MultiSpan, |
| pub render_span: Option<MultiSpan>, |
| } |
| |
| #[derive(PartialEq, Eq)] |
| pub struct DiagnosticStyledString(pub Vec<StringPart>); |
| |
| impl DiagnosticStyledString { |
| pub fn new() -> DiagnosticStyledString { |
| DiagnosticStyledString(vec![]) |
| } |
| pub fn push_normal<S: Into<String>>(&mut self, t: S) { |
| self.0.push(StringPart::Normal(t.into())); |
| } |
| pub fn push_highlighted<S: Into<String>>(&mut self, t: S) { |
| self.0.push(StringPart::Highlighted(t.into())); |
| } |
| pub fn normal<S: Into<String>>(t: S) -> DiagnosticStyledString { |
| DiagnosticStyledString(vec![StringPart::Normal(t.into())]) |
| } |
| |
| pub fn highlighted<S: Into<String>>(t: S) -> DiagnosticStyledString { |
| DiagnosticStyledString(vec![StringPart::Highlighted(t.into())]) |
| } |
| |
| pub fn content(&self) -> String { |
| self.0.iter().map(|x| x.content()).collect::<String>() |
| } |
| } |
| |
| #[derive(PartialEq, Eq)] |
| pub enum StringPart { |
| Normal(String), |
| Highlighted(String), |
| } |
| |
| impl StringPart { |
| pub fn content(&self) -> &str { |
| match self { |
| &StringPart::Normal(ref s) | & StringPart::Highlighted(ref s) => s |
| } |
| } |
| } |
| |
| impl Diagnostic { |
| pub fn new(level: Level, message: &str) -> Self { |
| Diagnostic::new_with_code(level, None, message) |
| } |
| |
| pub fn new_with_code(level: Level, code: Option<DiagnosticId>, message: &str) -> Self { |
| Diagnostic { |
| level, |
| message: vec![(message.to_owned(), Style::NoStyle)], |
| code, |
| span: MultiSpan::new(), |
| children: vec![], |
| suggestions: vec![], |
| } |
| } |
| |
| pub fn is_error(&self) -> bool { |
| match self.level { |
| Level::Bug | |
| Level::Fatal | |
| Level::Error | |
| Level::FailureNote => { |
| true |
| } |
| |
| Level::Warning | |
| Level::Note | |
| Level::Help | |
| Level::Cancelled => { |
| false |
| } |
| } |
| } |
| |
| /// Cancel the diagnostic (a structured diagnostic must either be emitted or |
| /// canceled or it will panic when dropped). |
| pub fn cancel(&mut self) { |
| self.level = Level::Cancelled; |
| } |
| |
| pub fn cancelled(&self) -> bool { |
| self.level == Level::Cancelled |
| } |
| |
| /// Adds a span/label to be included in the resulting snippet. |
| /// This label will be shown together with the original span/label used when creating the |
| /// diagnostic, *not* a span added by one of the `span_*` methods. |
| /// |
| /// This is pushed onto the `MultiSpan` that was created when the |
| /// diagnostic was first built. If you don't call this function at |
| /// all, and you just supplied a `Span` to create the diagnostic, |
| /// then the snippet will just include that `Span`, which is |
| /// called the primary span. |
| pub fn span_label<T: Into<String>>(&mut self, span: Span, label: T) -> &mut Self { |
| self.span.push_span_label(span, label.into()); |
| self |
| } |
| |
| pub fn replace_span_with(&mut self, after: Span) -> &mut Self { |
| let before = self.span.clone(); |
| self.set_span(after); |
| for span_label in before.span_labels() { |
| if let Some(label) = span_label.label { |
| self.span_label(after, label); |
| } |
| } |
| self |
| } |
| |
| pub fn note_expected_found(&mut self, |
| label: &dyn fmt::Display, |
| expected: DiagnosticStyledString, |
| found: DiagnosticStyledString) |
| -> &mut Self |
| { |
| self.note_expected_found_extra(label, expected, found, &"", &"") |
| } |
| |
| pub fn note_expected_found_extra(&mut self, |
| label: &dyn fmt::Display, |
| expected: DiagnosticStyledString, |
| found: DiagnosticStyledString, |
| expected_extra: &dyn fmt::Display, |
| found_extra: &dyn fmt::Display) |
| -> &mut Self |
| { |
| let mut msg: Vec<_> = vec![(format!("expected {} `", label), Style::NoStyle)]; |
| msg.extend(expected.0.iter() |
| .map(|x| match *x { |
| StringPart::Normal(ref s) => (s.to_owned(), Style::NoStyle), |
| StringPart::Highlighted(ref s) => (s.to_owned(), Style::Highlight), |
| })); |
| msg.push((format!("`{}\n", expected_extra), Style::NoStyle)); |
| msg.push((format!(" found {} `", label), Style::NoStyle)); |
| msg.extend(found.0.iter() |
| .map(|x| match *x { |
| StringPart::Normal(ref s) => (s.to_owned(), Style::NoStyle), |
| StringPart::Highlighted(ref s) => (s.to_owned(), Style::Highlight), |
| })); |
| msg.push((format!("`{}", found_extra), Style::NoStyle)); |
| |
| // For now, just attach these as notes |
| self.highlighted_note(msg); |
| self |
| } |
| |
| pub fn note_trait_signature(&mut self, name: String, signature: String) -> &mut Self { |
| self.highlighted_note(vec![ |
| (format!("`{}` from trait: `", name), Style::NoStyle), |
| (signature, Style::Highlight), |
| ("`".to_string(), Style::NoStyle)]); |
| self |
| } |
| |
| pub fn note(&mut self, msg: &str) -> &mut Self { |
| self.sub(Level::Note, msg, MultiSpan::new(), None); |
| self |
| } |
| |
| pub fn highlighted_note(&mut self, msg: Vec<(String, Style)>) -> &mut Self { |
| self.sub_with_highlights(Level::Note, msg, MultiSpan::new(), None); |
| self |
| } |
| |
| /// Prints the span with a note above it. |
| pub fn span_note<S: Into<MultiSpan>>(&mut self, |
| sp: S, |
| msg: &str) |
| -> &mut Self { |
| self.sub(Level::Note, msg, sp.into(), None); |
| self |
| } |
| |
| pub fn warn(&mut self, msg: &str) -> &mut Self { |
| self.sub(Level::Warning, msg, MultiSpan::new(), None); |
| self |
| } |
| |
| /// Prints the span with a warn above it. |
| pub fn span_warn<S: Into<MultiSpan>>(&mut self, |
| sp: S, |
| msg: &str) |
| -> &mut Self { |
| self.sub(Level::Warning, msg, sp.into(), None); |
| self |
| } |
| |
| pub fn help(&mut self , msg: &str) -> &mut Self { |
| self.sub(Level::Help, msg, MultiSpan::new(), None); |
| self |
| } |
| |
| /// Prints the span with some help above it. |
| pub fn span_help<S: Into<MultiSpan>>(&mut self, |
| sp: S, |
| msg: &str) |
| -> &mut Self { |
| self.sub(Level::Help, msg, sp.into(), None); |
| self |
| } |
| |
| pub fn multipart_suggestion( |
| &mut self, |
| msg: &str, |
| suggestion: Vec<(Span, String)>, |
| applicability: Applicability, |
| ) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: suggestion |
| .into_iter() |
| .map(|(span, snippet)| SubstitutionPart { snippet, span }) |
| .collect(), |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::ShowCode, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Prints out a message with for a multipart suggestion without showing the suggested code. |
| /// |
| /// This is intended to be used for suggestions that are obvious in what the changes need to |
| /// be from the message, showing the span label inline would be visually unpleasant |
| /// (marginally overlapping spans or multiline spans) and showing the snippet window wouldn't |
| /// improve understandability. |
| pub fn tool_only_multipart_suggestion( |
| &mut self, |
| msg: &str, |
| suggestion: Vec<(Span, String)>, |
| applicability: Applicability, |
| ) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: suggestion |
| .into_iter() |
| .map(|(span, snippet)| SubstitutionPart { snippet, span }) |
| .collect(), |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::CompletelyHidden, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Prints out a message with a suggested edit of the code. |
| /// |
| /// In case of short messages and a simple suggestion, rustc displays it as a label: |
| /// |
| /// ```text |
| /// try adding parentheses: `(tup.0).1` |
| /// ``` |
| /// |
| /// The message |
| /// |
| /// * should not end in any punctuation (a `:` is added automatically) |
| /// * should not be a question (avoid language like "did you mean") |
| /// * should not contain any phrases like "the following", "as shown", etc. |
| /// * may look like "to do xyz, use" or "to do xyz, use abc" |
| /// * may contain a name of a function, variable, or type, but not whole expressions |
| /// |
| /// See `CodeSuggestion` for more information. |
| pub fn span_suggestion(&mut self, sp: Span, msg: &str, |
| suggestion: String, |
| applicability: Applicability) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: vec![SubstitutionPart { |
| snippet: suggestion, |
| span: sp, |
| }], |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::ShowCode, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Prints out a message with multiple suggested edits of the code. |
| pub fn span_suggestions(&mut self, sp: Span, msg: &str, |
| suggestions: impl Iterator<Item = String>, applicability: Applicability) -> &mut Self |
| { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: suggestions.map(|snippet| Substitution { |
| parts: vec![SubstitutionPart { |
| snippet, |
| span: sp, |
| }], |
| }).collect(), |
| msg: msg.to_owned(), |
| style: SuggestionStyle::ShowCode, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Prints out a message with a suggested edit of the code. If the suggestion is presented |
| /// inline, it will only show the message and not the suggestion. |
| /// |
| /// See `CodeSuggestion` for more information. |
| pub fn span_suggestion_short( |
| &mut self, sp: Span, msg: &str, suggestion: String, applicability: Applicability |
| ) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: vec![SubstitutionPart { |
| snippet: suggestion, |
| span: sp, |
| }], |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::HideCodeInline, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Prints out a message with for a suggestion without showing the suggested code. |
| /// |
| /// This is intended to be used for suggestions that are obvious in what the changes need to |
| /// be from the message, showing the span label inline would be visually unpleasant |
| /// (marginally overlapping spans or multiline spans) and showing the snippet window wouldn't |
| /// improve understandability. |
| pub fn span_suggestion_hidden( |
| &mut self, sp: Span, msg: &str, suggestion: String, applicability: Applicability |
| ) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: vec![SubstitutionPart { |
| snippet: suggestion, |
| span: sp, |
| }], |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::HideCodeAlways, |
| applicability, |
| }); |
| self |
| } |
| |
| /// Adds a suggestion to the json output, but otherwise remains silent/undisplayed in the cli. |
| /// |
| /// This is intended to be used for suggestions that are *very* obvious in what the changes |
| /// need to be from the message, but we still want other tools to be able to apply them. |
| pub fn tool_only_span_suggestion( |
| &mut self, sp: Span, msg: &str, suggestion: String, applicability: Applicability |
| ) -> &mut Self { |
| self.suggestions.push(CodeSuggestion { |
| substitutions: vec![Substitution { |
| parts: vec![SubstitutionPart { |
| snippet: suggestion, |
| span: sp, |
| }], |
| }], |
| msg: msg.to_owned(), |
| style: SuggestionStyle::CompletelyHidden, |
| applicability, |
| }); |
| self |
| } |
| |
| pub fn set_span<S: Into<MultiSpan>>(&mut self, sp: S) -> &mut Self { |
| self.span = sp.into(); |
| self |
| } |
| |
| pub fn code(&mut self, s: DiagnosticId) -> &mut Self { |
| self.code = Some(s); |
| self |
| } |
| |
| pub fn get_code(&self) -> Option<DiagnosticId> { |
| self.code.clone() |
| } |
| |
| pub fn message(&self) -> String { |
| self.message.iter().map(|i| i.0.as_str()).collect::<String>() |
| } |
| |
| pub fn styled_message(&self) -> &Vec<(String, Style)> { |
| &self.message |
| } |
| |
| /// Used by a lint. Copies over all details *but* the "main |
| /// message". |
| pub fn copy_details_not_message(&mut self, from: &Diagnostic) { |
| self.span = from.span.clone(); |
| self.code = from.code.clone(); |
| self.children.extend(from.children.iter().cloned()) |
| } |
| |
| /// Convenience function for internal use, clients should use one of the |
| /// public methods above. |
| pub fn sub(&mut self, |
| level: Level, |
| message: &str, |
| span: MultiSpan, |
| render_span: Option<MultiSpan>) { |
| let sub = SubDiagnostic { |
| level, |
| message: vec![(message.to_owned(), Style::NoStyle)], |
| span, |
| render_span, |
| }; |
| self.children.push(sub); |
| } |
| |
| /// Convenience function for internal use, clients should use one of the |
| /// public methods above. |
| fn sub_with_highlights(&mut self, |
| level: Level, |
| message: Vec<(String, Style)>, |
| span: MultiSpan, |
| render_span: Option<MultiSpan>) { |
| let sub = SubDiagnostic { |
| level, |
| message, |
| span, |
| render_span, |
| }; |
| self.children.push(sub); |
| } |
| } |
| |
| impl SubDiagnostic { |
| pub fn message(&self) -> String { |
| self.message.iter().map(|i| i.0.as_str()).collect::<String>() |
| } |
| |
| pub fn styled_message(&self) -> &Vec<(String, Style)> { |
| &self.message |
| } |
| } |
