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errors: lazily load fallback fluent bundle

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Loading the fallback bundle in compilation sessions that won't go on to
emit any errors unnecessarily degrades compile time performance, so
lazily create the Fluent bundle when it is first required.

Signed-off-by: David Wood <david.wood@huawei.com>
This commit is contained in:
David Wood
2022-04-12 09:34:40 +01:00
parent f6cef572d6
commit 9bfe0e39e4
19 changed files with 94 additions and 81 deletions
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16
compiler/rustc_errors/src/json.rs
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@@ -15,7 +15,9 @@ use crate::emitter::{Emitter, HumanReadableErrorType};
use crate::registry::Registry;
use crate::DiagnosticId;
use crate::ToolMetadata;
use crate::{CodeSuggestion, FluentBundle, MultiSpan, SpanLabel, SubDiagnostic};
use crate::{
CodeSuggestion, FluentBundle, LazyFallbackBundle, MultiSpan, SpanLabel, SubDiagnostic,
};
use rustc_lint_defs::Applicability;
use rustc_data_structures::sync::Lrc;
@@ -38,7 +40,7 @@ pub struct JsonEmitter {
registry: Option<Registry>,
sm: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: Lrc<FluentBundle>,
fallback_bundle: LazyFallbackBundle,
pretty: bool,
ui_testing: bool,
json_rendered: HumanReadableErrorType,
@@ -51,7 +53,7 @@ impl JsonEmitter {
registry: Option<Registry>,
source_map: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: Lrc<FluentBundle>,
fallback_bundle: LazyFallbackBundle,
pretty: bool,
json_rendered: HumanReadableErrorType,
terminal_width: Option<usize>,
@@ -75,7 +77,7 @@ impl JsonEmitter {
pretty: bool,
json_rendered: HumanReadableErrorType,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: Lrc<FluentBundle>,
fallback_bundle: LazyFallbackBundle,
terminal_width: Option<usize>,
macro_backtrace: bool,
) -> JsonEmitter {
@@ -97,7 +99,7 @@ impl JsonEmitter {
registry: Option<Registry>,
source_map: Lrc<SourceMap>,
fluent_bundle: Option<Lrc<FluentBundle>>,
fallback_bundle: Lrc<FluentBundle>,
fallback_bundle: LazyFallbackBundle,
pretty: bool,
json_rendered: HumanReadableErrorType,
terminal_width: Option<usize>,
@@ -192,8 +194,8 @@ impl Emitter for JsonEmitter {
self.fluent_bundle.as_ref()
}
fn fallback_fluent_bundle(&self) -> &Lrc<FluentBundle> {
&self.fallback_bundle
fn fallback_fluent_bundle(&self) -> &FluentBundle {
&**self.fallback_bundle
}
fn should_show_explain(&self) -> bool {