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-rw-r--r--compiler/rustc_session/src/parse.rs112
1 files changed, 99 insertions, 13 deletions
diff --git a/compiler/rustc_session/src/parse.rs b/compiler/rustc_session/src/parse.rs
index f31d52147..0389b2a06 100644
--- a/compiler/rustc_session/src/parse.rs
+++ b/compiler/rustc_session/src/parse.rs
@@ -2,15 +2,18 @@
//! It also serves as an input to the parser itself.
use crate::config::CheckCfg;
-use crate::lint::{BufferedEarlyLint, BuiltinLintDiagnostics, Lint, LintId};
+use crate::errors::{FeatureDiagnosticForIssue, FeatureDiagnosticHelp, FeatureGateError};
+use crate::lint::{
+ builtin::UNSTABLE_SYNTAX_PRE_EXPANSION, BufferedEarlyLint, BuiltinLintDiagnostics, Lint, LintId,
+};
use crate::SessionDiagnostic;
use rustc_ast::node_id::NodeId;
-use rustc_data_structures::fx::{FxHashMap, FxHashSet};
+use rustc_data_structures::fx::{FxHashMap, FxHashSet, FxIndexSet};
use rustc_data_structures::sync::{Lock, Lrc};
use rustc_errors::{emitter::SilentEmitter, ColorConfig, Handler};
use rustc_errors::{
- error_code, fallback_fluent_bundle, Applicability, Diagnostic, DiagnosticBuilder,
- DiagnosticMessage, ErrorGuaranteed, MultiSpan,
+ fallback_fluent_bundle, Applicability, Diagnostic, DiagnosticBuilder, DiagnosticId,
+ DiagnosticMessage, EmissionGuarantee, ErrorGuaranteed, MultiSpan, StashKey,
};
use rustc_feature::{find_feature_issue, GateIssue, UnstableFeatures};
use rustc_span::edition::Edition;
@@ -18,11 +21,12 @@ use rustc_span::hygiene::ExpnId;
use rustc_span::source_map::{FilePathMapping, SourceMap};
use rustc_span::{Span, Symbol};
+use rustc_ast::attr::AttrIdGenerator;
use std::str;
/// The set of keys (and, optionally, values) that define the compilation
/// environment of the crate, used to drive conditional compilation.
-pub type CrateConfig = FxHashSet<(Symbol, Option<Symbol>)>;
+pub type CrateConfig = FxIndexSet<(Symbol, Option<Symbol>)>;
pub type CrateCheckConfig = CheckCfg<Symbol>;
/// Collected spans during parsing for places where a certain feature was
@@ -101,11 +105,60 @@ pub fn feature_err_issue<'a>(
issue: GateIssue,
explain: &str,
) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
- let mut err = sess.span_diagnostic.struct_span_err_with_code(span, explain, error_code!(E0658));
+ let span = span.into();
+
+ // Cancel an earlier warning for this same error, if it exists.
+ if let Some(span) = span.primary_span() {
+ sess.span_diagnostic
+ .steal_diagnostic(span, StashKey::EarlySyntaxWarning)
+ .map(|err| err.cancel());
+ }
+
+ let mut err = sess.create_err(FeatureGateError { span, explain });
add_feature_diagnostics_for_issue(&mut err, sess, feature, issue);
err
}
+/// Construct a future incompatibility diagnostic for a feature gate.
+///
+/// This diagnostic is only a warning and *does not cause compilation to fail*.
+pub fn feature_warn<'a>(sess: &'a ParseSess, feature: Symbol, span: Span, explain: &str) {
+ feature_warn_issue(sess, feature, span, GateIssue::Language, explain);
+}
+
+/// Construct a future incompatibility diagnostic for a feature gate.
+///
+/// This diagnostic is only a warning and *does not cause compilation to fail*.
+///
+/// This variant allows you to control whether it is a library or language feature.
+/// Almost always, you want to use this for a language feature. If so, prefer `feature_warn`.
+#[allow(rustc::diagnostic_outside_of_impl)]
+#[allow(rustc::untranslatable_diagnostic)]
+pub fn feature_warn_issue<'a>(
+ sess: &'a ParseSess,
+ feature: Symbol,
+ span: Span,
+ issue: GateIssue,
+ explain: &str,
+) {
+ let mut err = sess.span_diagnostic.struct_span_warn(span, explain);
+ add_feature_diagnostics_for_issue(&mut err, sess, feature, issue);
+
+ // Decorate this as a future-incompatibility lint as in rustc_middle::lint::struct_lint_level
+ let lint = UNSTABLE_SYNTAX_PRE_EXPANSION;
+ let future_incompatible = lint.future_incompatible.as_ref().unwrap();
+ err.code(DiagnosticId::Lint {
+ name: lint.name_lower(),
+ has_future_breakage: false,
+ is_force_warn: false,
+ });
+ err.warn(lint.desc);
+ err.note(format!("for more information, see {}", future_incompatible.reference));
+
+ // A later feature_err call can steal and cancel this warning.
+ err.stash(span, StashKey::EarlySyntaxWarning);
+}
+
/// Adds the diagnostics for a feature to an existing error.
pub fn add_feature_diagnostics<'a>(err: &mut Diagnostic, sess: &'a ParseSess, feature: Symbol) {
add_feature_diagnostics_for_issue(err, sess, feature, GateIssue::Language);
@@ -123,14 +176,12 @@ pub fn add_feature_diagnostics_for_issue<'a>(
issue: GateIssue,
) {
if let Some(n) = find_feature_issue(feature, issue) {
- err.note(&format!(
- "see issue #{n} <https://github.com/rust-lang/rust/issues/{n}> for more information"
- ));
+ err.subdiagnostic(FeatureDiagnosticForIssue { n });
}
// #23973: do not suggest `#![feature(...)]` if we are in beta/stable
if sess.unstable_features.is_nightly_build() {
- err.help(&format!("add `#![feature({feature})]` to the crate attributes to enable"));
+ err.subdiagnostic(FeatureDiagnosticHelp { feature });
}
}
@@ -169,6 +220,8 @@ pub struct ParseSess {
/// Spans passed to `proc_macro::quote_span`. Each span has a numerical
/// identifier represented by its position in the vector.
pub proc_macro_quoted_spans: Lock<Vec<Span>>,
+ /// Used to generate new `AttrId`s. Every `AttrId` is unique.
+ pub attr_id_generator: AttrIdGenerator,
}
impl ParseSess {
@@ -191,7 +244,7 @@ impl ParseSess {
Self {
span_diagnostic: handler,
unstable_features: UnstableFeatures::from_environment(None),
- config: FxHashSet::default(),
+ config: FxIndexSet::default(),
check_config: CrateCheckConfig::default(),
edition: ExpnId::root().expn_data().edition,
raw_identifier_spans: Lock::new(Vec::new()),
@@ -207,6 +260,7 @@ impl ParseSess {
type_ascription_path_suggestions: Default::default(),
assume_incomplete_release: false,
proc_macro_quoted_spans: Default::default(),
+ attr_id_generator: AttrIdGenerator::new(),
}
}
@@ -293,7 +347,7 @@ impl ParseSess {
&'a self,
err: impl SessionDiagnostic<'a>,
) -> DiagnosticBuilder<'a, ErrorGuaranteed> {
- err.into_diagnostic(self)
+ err.into_diagnostic(&self.span_diagnostic)
}
pub fn emit_err<'a>(&'a self, err: impl SessionDiagnostic<'a>) -> ErrorGuaranteed {
@@ -304,14 +358,27 @@ impl ParseSess {
&'a self,
warning: impl SessionDiagnostic<'a, ()>,
) -> DiagnosticBuilder<'a, ()> {
- warning.into_diagnostic(self)
+ warning.into_diagnostic(&self.span_diagnostic)
}
pub fn emit_warning<'a>(&'a self, warning: impl SessionDiagnostic<'a, ()>) {
self.create_warning(warning).emit()
}
+ pub fn create_fatal<'a>(
+ &'a self,
+ fatal: impl SessionDiagnostic<'a, !>,
+ ) -> DiagnosticBuilder<'a, !> {
+ fatal.into_diagnostic(&self.span_diagnostic)
+ }
+
+ pub fn emit_fatal<'a>(&'a self, fatal: impl SessionDiagnostic<'a, !>) -> ! {
+ self.create_fatal(fatal).emit()
+ }
+
#[rustc_lint_diagnostics]
+ #[allow(rustc::diagnostic_outside_of_impl)]
+ #[allow(rustc::untranslatable_diagnostic)]
pub fn struct_err(
&self,
msg: impl Into<DiagnosticMessage>,
@@ -320,7 +387,26 @@ impl ParseSess {
}
#[rustc_lint_diagnostics]
+ #[allow(rustc::diagnostic_outside_of_impl)]
+ #[allow(rustc::untranslatable_diagnostic)]
pub fn struct_warn(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, ()> {
self.span_diagnostic.struct_warn(msg)
}
+
+ #[rustc_lint_diagnostics]
+ #[allow(rustc::diagnostic_outside_of_impl)]
+ #[allow(rustc::untranslatable_diagnostic)]
+ pub fn struct_fatal(&self, msg: impl Into<DiagnosticMessage>) -> DiagnosticBuilder<'_, !> {
+ self.span_diagnostic.struct_fatal(msg)
+ }
+
+ #[rustc_lint_diagnostics]
+ #[allow(rustc::diagnostic_outside_of_impl)]
+ #[allow(rustc::untranslatable_diagnostic)]
+ pub fn struct_diagnostic<G: EmissionGuarantee>(
+ &self,
+ msg: impl Into<DiagnosticMessage>,
+ ) -> DiagnosticBuilder<'_, G> {
+ self.span_diagnostic.struct_diagnostic(msg)
+ }
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 07:39:32 +0000