Struct rustc_ap_rustc_errors::DiagnosticBuilder

#[must_use]pub struct DiagnosticBuilder<'a>(_);

Used for emitting structured error messages and other diagnostic information.

If there is some state in a downstream crate you would like to access in the methods of DiagnosticBuilder here, consider extending HandlerFlags, accessed via self.handler.flags.

Implementations

impl<'a> DiagnosticBuilder<'a>

pub fn emit(&mut self)

Emit the diagnostic.

pub fn emit_unless(&mut self, delay: bool)

Emit the diagnostic unless delay is true, in which case the emission will be delayed as a bug.

See emit and delay_as_bug for details.

pub fn stash(self, span: Span, key: StashKey)

Stashes diagnostic for possible later improvement in a different, later stage of the compiler. The diagnostic can be accessed with the provided span and key through .steal_diagnostic on Handler.

As with buffer, this is unless the handler has disabled such buffering.

pub fn into_diagnostic(self) -> Option<(Diagnostic, &'a Handler)>

Converts the builder to a Diagnostic for later emission, unless handler has disabled such buffering.

pub fn buffer(self, buffered_diagnostics: &mut Vec<Diagnostic>)

Buffers the diagnostic for later emission, unless handler has disabled such buffering.

pub fn sub<S: Into<MultiSpan>>(
    &mut self,
    level: Level,
    message: &str,
    span: Option<S>
) -> &mut Self

Convenience function for internal use, clients should use one of the span_* methods instead.

pub fn delay_as_bug(&mut self)

Delay emission of this diagnostic as a bug.

This can be useful in contexts where an error indicates a bug but typically this only happens when other compilation errors have already happened. In those cases this can be used to defer emission of this diagnostic as a bug in the compiler only if no other errors have been emitted.

In the meantime, though, callsites are required to deal with the "bug" locally in whichever way makes the most sense.

pub fn span_label(&mut self, span: Span, label: impl Into<String>) -> &mut Self

Adds a span/label to be included in the resulting snippet.

This is pushed onto the MultiSpan that was created when the diagnostic was first built. That means it will be shown together with the original span/label, not a span added by one of the span_{note,warn,help,suggestions} methods.

This span is not considered a "primary span"; only the Span supplied when creating the diagnostic is primary.

pub fn span_labels(
    &mut self,
    spans: impl IntoIterator<Item = Span>,
    label: impl AsRef<str>
) -> &mut Self

Labels all the given spans with the provided label. See span_label for more information.

pub fn note_expected_found(
    &mut self,
    expected_label: &dyn Display,
    expected: DiagnosticStyledString,
    found_label: &dyn Display,
    found: DiagnosticStyledString
) -> &mut Self

pub fn note_expected_found_extra(
    &mut self,
    expected_label: &dyn Display,
    expected: DiagnosticStyledString,
    found_label: &dyn Display,
    found: DiagnosticStyledString,
    expected_extra: &dyn Display,
    found_extra: &dyn Display
) -> &mut Self

pub fn note_unsuccessfull_coercion(
    &mut self,
    expected: DiagnosticStyledString,
    found: DiagnosticStyledString
) -> &mut Self

pub fn note(&mut self, msg: &str) -> &mut Self

pub fn span_note<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

pub fn warn(&mut self, msg: &str) -> &mut Self

pub fn span_warn<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

pub fn help(&mut self, msg: &str) -> &mut Self

pub fn span_help<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

pub fn multipart_suggestion(
    &mut self,
    msg: &str,
    suggestion: Vec<(Span, String)>,
    applicability: Applicability
) -> &mut Self

pub fn multipart_suggestions(
    &mut self,
    msg: &str,
    suggestions: Vec<Vec<(Span, String)>>,
    applicability: Applicability
) -> &mut Self

pub fn tool_only_multipart_suggestion(
    &mut self,
    msg: &str,
    suggestion: Vec<(Span, String)>,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestion(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestions(
    &mut self,
    sp: Span,
    msg: &str,
    suggestions: impl Iterator<Item = String>,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestion_short(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestion_verbose(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestion_hidden(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn tool_only_span_suggestion(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn set_span<S: Into<MultiSpan>>(&mut self, sp: S) -> &mut Self

pub fn code(&mut self, s: DiagnosticId) -> &mut Self

pub fn allow_suggestions(&mut self, allow: bool) -> &mut Self

Methods from Deref<Target = Diagnostic>

pub fn is_error(&self) -> bool

pub fn cancel(&mut self)

Cancel the diagnostic (a structured diagnostic must either be emitted or canceled or it will panic when dropped).

pub fn cancelled(&self) -> bool

pub fn set_sort_span(&mut self, sp: Span)

Set the sorting span.

pub fn span_label<T: Into<String>>(&mut self, span: Span, label: T) -> &mut Self

Adds a span/label to be included in the resulting snippet.

This is pushed onto the MultiSpan that was created when the diagnostic was first built. That means it will be shown together with the original span/label, not a span added by one of the span_{note,warn,help,suggestions} methods.

This span is not considered a "primary span"; only the Span supplied when creating the diagnostic is primary.

pub fn replace_span_with(&mut self, after: Span) -> &mut Self

pub fn note_expected_found(
    &mut self,
    expected_label: &dyn Display,
    expected: DiagnosticStyledString,
    found_label: &dyn Display,
    found: DiagnosticStyledString
) -> &mut Self

pub fn note_unsuccessfull_coercion(
    &mut self,
    expected: DiagnosticStyledString,
    found: DiagnosticStyledString
) -> &mut Self

pub fn note_expected_found_extra(
    &mut self,
    expected_label: &dyn Display,
    expected: DiagnosticStyledString,
    found_label: &dyn Display,
    found: DiagnosticStyledString,
    expected_extra: &dyn Display,
    found_extra: &dyn Display
) -> &mut Self

pub fn note_trait_signature(
    &mut self,
    name: String,
    signature: String
) -> &mut Self

pub fn note(&mut self, msg: &str) -> &mut Self

pub fn highlighted_note(&mut self, msg: Vec<(String, Style)>) -> &mut Self

pub fn span_note<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

Prints the span with a note above it.

pub fn warn(&mut self, msg: &str) -> &mut Self

pub fn span_warn<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

Prints the span with a warn above it.

pub fn help(&mut self, msg: &str) -> &mut Self

pub fn span_help<S: Into<MultiSpan>>(&mut self, sp: S, msg: &str) -> &mut Self

Prints the span with some help above it.

pub fn multipart_suggestion(
    &mut self,
    msg: &str,
    suggestion: Vec<(Span, String)>,
    applicability: Applicability
) -> &mut Self

pub fn multipart_suggestions(
    &mut self,
    msg: &str,
    suggestions: Vec<Vec<(Span, String)>>,
    applicability: Applicability
) -> &mut Self

pub fn tool_only_multipart_suggestion(
    &mut self,
    msg: &str,
    suggestion: Vec<(Span, String)>,
    applicability: Applicability
) -> &mut 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 span_suggestion(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut 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:

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_with_style(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability,
    style: SuggestionStyle
) -> &mut Self

pub fn span_suggestion_verbose(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut Self

pub fn span_suggestions(
    &mut self,
    sp: Span,
    msg: &str,
    suggestions: impl Iterator<Item = String>,
    applicability: Applicability
) -> &mut Self

Prints out a message with multiple suggested edits of the code.

pub fn span_suggestion_short(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut 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_hidden(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut 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 tool_only_span_suggestion(
    &mut self,
    sp: Span,
    msg: &str,
    suggestion: String,
    applicability: Applicability
) -> &mut 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 set_span<S: Into<MultiSpan>>(&mut self, sp: S) -> &mut Self

pub fn code(&mut self, s: DiagnosticId) -> &mut Self

pub fn clear_code(&mut self) -> &mut Self

pub fn get_code(&self) -> Option<DiagnosticId>

pub fn set_primary_message<M: Into<String>>(&mut self, msg: M) -> &mut Self

pub fn message(&self) -> String

pub fn styled_message(&self) -> &Vec<(String, Style)>

pub fn copy_details_not_message(&mut self, from: &Diagnostic)

Used by a lint. Copies over all details but the "main message".

pub fn sub(
    &mut self,
    level: Level,
    message: &str,
    span: MultiSpan,
    render_span: Option<MultiSpan>
)

Convenience function for internal use, clients should use one of the public methods above.

Trait Implementations

impl<'a> Clone for DiagnosticBuilder<'a>

fn clone(&self) -> DiagnosticBuilder<'a>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a> Debug for DiagnosticBuilder<'a>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'a> Deref for DiagnosticBuilder<'a>

type Target = Diagnostic

The resulting type after dereferencing.

fn deref(&self) -> &Diagnostic

Dereferences the value.

impl<'a> DerefMut for DiagnosticBuilder<'a>

fn deref_mut(&mut self) -> &mut Diagnostic

Mutably dereferences the value.

impl<'a> Drop for DiagnosticBuilder<'a>

Destructor bomb - a DiagnosticBuilder must be either emitted or canceled or we emit a bug.

fn drop(&mut self)

Executes the destructor for this type.