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rustc_errors - Rust

Diagnostics creation and emission for rustc.

This module contains the code for creating and emitting diagnostics.

pub use emitter::ColorConfig;

pub use rustc_error_messages::fluent_bundle;

pub use codes::*;

annotate_snippet_emitter_writer

Emit diagnostics using the annotate-snippets library

codes

This module defines the following.

diagnostic ðŸ”’

diagnostic_impls ðŸ”’

emitter

The current rustc diagnostics emitter.

error

json

A JSON emitter for errors.

lock ðŸ”’

Bindings to acquire a global named lock.

markdown

A simple markdown parser that can write formatted text to the terminal

registry

snippet ðŸ”’

styled_buffer ðŸ”’

timings

translation

into_diag_arg_using_display

pluralize

struct_span_code_err

BugAbort

Marker type which enables implementation of create_bug and emit_bug functions for bug diagnostics.

CodeSuggestion

ColorSpec

A color specification.

DelayedBugPanic

Signifies that the compiler died due to a delayed bug rather than a failed assertion, etc.

DelayedDiagInner ðŸ”’

Diag

Used for emitting structured error messages and other diagnostic information. Wraps a DiagInner, adding some useful things.

DiagArgFromDisplay

DiagCtxt

A DiagCtxt deals with errors and other compiler output. Certain errors (fatal, bug, unimpl) may cause immediate exit, others log errors for later reporting.

DiagCtxtFlags

DiagCtxtHandle

DiagCtxtInner ðŸ”’

This inner struct exists to keep it all behind a single lock; this is done to prevent possible deadlocks in a multi-threaded compiler, as well as inconsistent state observation.

DiagInner

The main part of a diagnostic. Note that Diag, which wraps this type, is used for most operations, and should be used instead whenever possible. This type should only be used when Diag’s lifetime causes difficulties, e.g. when storing diagnostics within DiagCtxt.

DiagStyledString

DiagSymbolList

ElidedLifetimeInPathSubdiag

ErrorGuaranteed

Useful type to use with Result<> indicate that an error has already been reported to the user, so no need to continue checking.

ExpectedLifetimeParameter

ExplicitBug

Signifies that the compiler died with an explicit call to .bug or .span_bug rather than a failed assertion, etc.

FatalAbort

Marker type which enables implementation of create_fatal and emit_fatal functions for fatal diagnostics.

FatalError

Used as a return value to signify a fatal error occurred.

FatalErrorMarker

This is a marker for a fatal compiler error used with resume_unwind.

IndicateAnonymousLifetime

LanguageIdentifier

LanguageIdentifier is a core struct representing a Unicode Language Identifier.

MultiSpan

A collection of Spans.

SingleLabelManySpans

Utility struct used to apply a single label while highlighting multiple spans

SpanLabel

A span together with some additional data.

StringPart

Subdiag

A “sub”-diagnostic attached to a parent diagnostic. For example, a note attached to an error.

Substitution

See the docs on CodeSuggestion::substitutions

SubstitutionHighlight ðŸ”’

Used to translate between Spans and byte positions within a single output line in highlighted code of structured suggestions.

SubstitutionPart

Applicability

Indicates the confidence in the correctness of a suggestion.

Color

The set of available colors for the terminal foreground/background.

DiagArgValue

Simplified version of FluentValue that can implement Encodable and Decodable. Converted to a FluentValue by the emitter to be used in diagnostic translation.

DiagMessage

Abstraction over a message in a diagnostic to support both translatable and non-translatable diagnostic messages.

Level

StashKey

A key denoting where from a diagnostic was stashed.

Style

SubdiagMessage

Abstraction over a message in a subdiagnostic (i.e. label, note, help, etc) to support both translatable and non-translatable diagnostic messages.

SuggestionStyle

Suggestions

Represents the help messages seen on a diagnostic.

TerminalUrl

DEFAULT_LOCALE_RESOURCE

Raw content of Fluent resource for this crate, generated by fluent_messages macro, imported by rustc_driver to include all crates’ resources in one bundle.

TRACK_DIAGNOSTIC

Diagnostics emitted by DiagCtxtInner::emit_diagnostic are passed through this function. Used for tracking by incremental, to replay diagnostics as necessary.

Diagnostic

Trait implemented by error types. This is rarely implemented manually. Instead, use #[derive(Diagnostic)] – see rustc_macros::Diagnostic.

EmissionGuarantee

Trait for types that Diag::emit can return as a “guarantee” (or “proof”) token that the emission happened.

IntoDiagArg

Converts a value of a type into a DiagArg (typically a field of an Diag struct). Implemented as a custom trait rather than From so that it is implemented on the type being converted rather than on DiagArgValue, which enables types from other rustc_* crates to implement this.

LintDiagnostic

Trait implemented by lint types. This should not be implemented manually. Instead, use #[derive(LintDiagnostic)] – see rustc_macros::LintDiagnostic.

LintEmitter

Used to avoid depending on rustc_middle in rustc_attr_parsing. Always the TyCtxt.

Subdiagnostic

Trait implemented by error types. This should not be implemented manually. Instead, use #[derive(Subdiagnostic)] – see rustc_macros::Subdiagnostic.

WriteColor

This trait describes the behavior of writers that support colored output.

a_or_an

Grammatical tool for displaying messages to end users in a nice form.

as_substr ðŸ”’

Given an original string like AACC, and a suggestion like AABBCC, try to detect the case where a substring of the suggestion is “sandwiched” in the original, like BB is. Return the length of the prefix, the “trimmed” suggestion, and the length of the suffix.

default_track_diagnostic ðŸ”’

elided_lifetime_in_path_suggestion

fallback_fluent_bundle

Return the default FluentBundle with standard “en-US” diagnostic messages.

fluent_bundle

Returns Fluent bundle with the user’s locale resources from $sysroot/share/locale/$requested_locale/*.ftl.

listify

Grammatical tool for displaying messages to end users in a nice form.

report_ambiguity_error

DiagArg

Simplified version of FluentArg that can implement Encodable and Decodable. Collection of DiagArg are converted to FluentArgs (consuming the collection) at the start of diagnostic emission.

DiagArgMap

DiagArgName

Name of a diagnostic argument.

FluentBundle

LazyFallbackBundle

Type alias for the result of fallback_fluent_bundle - a reference-counted pointer to a lazily evaluated fluent bundle.

PResult

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