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errors: only eagerly translate subdiagnostics
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Subdiagnostics don't need to be lazily translated, they can always be
eagerly translated. Eager translation is slightly more complex as we need
to have a `DiagCtxt` available to perform the translation, which involves
slightly more threading of that context.

This slight increase in complexity should enable later simplifications -
like passing `DiagCtxt` into `AddToDiagnostic` and moving Fluent messages
into the diagnostic structs rather than having them in separate files
(working on that was what led to this change).

Signed-off-by: David Wood <david@davidtw.co>
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@davidtwco
davidtwco committed Feb 15, 2024
1 parent bb89df6 commit 2097ec3
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Showing 43 changed files with 528 additions and 380 deletions.
89 changes: 54 additions & 35 deletions compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -229,7 +229,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
seen_spans.insert(move_span);
}

use_spans.var_path_only_subdiag(&mut err, desired_action);
use_spans.var_path_only_subdiag(self.dcx(), &mut err, desired_action);

if !is_loop_move {
err.span_label(
Expand Down Expand Up @@ -291,18 +291,24 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
if needs_note {
if let Some(local) = place.as_local() {
let span = self.body.local_decls[local].source_info.span;
err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Label {
is_partial_move,
ty,
place: &note_msg,
span,
});
err.subdiagnostic(
self.dcx(),
crate::session_diagnostics::TypeNoCopy::Label {
is_partial_move,
ty,
place: &note_msg,
span,
},
);
} else {
err.subdiagnostic(crate::session_diagnostics::TypeNoCopy::Note {
is_partial_move,
ty,
place: &note_msg,
});
err.subdiagnostic(
self.dcx(),
crate::session_diagnostics::TypeNoCopy::Note {
is_partial_move,
ty,
place: &note_msg,
},
);
};
}

Expand Down Expand Up @@ -557,7 +563,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
E0381,
"{used} binding {desc}{isnt_initialized}"
);
use_spans.var_path_only_subdiag(&mut err, desired_action);
use_spans.var_path_only_subdiag(self.dcx(), &mut err, desired_action);

if let InitializationRequiringAction::PartialAssignment
| InitializationRequiringAction::Assignment = desired_action
Expand Down Expand Up @@ -848,9 +854,13 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
&value_msg,
);

borrow_spans.var_path_only_subdiag(&mut err, crate::InitializationRequiringAction::Borrow);
borrow_spans.var_path_only_subdiag(
self.dcx(),
&mut err,
crate::InitializationRequiringAction::Borrow,
);

move_spans.var_subdiag(None, &mut err, None, |kind, var_span| {
move_spans.var_subdiag(self.dcx(), &mut err, None, |kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
match kind {
hir::ClosureKind::Coroutine(_) => MoveUseInCoroutine { var_span },
Expand Down Expand Up @@ -895,7 +905,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
borrow_span,
&self.describe_any_place(borrow.borrowed_place.as_ref()),
);
borrow_spans.var_subdiag(None, &mut err, Some(borrow.kind), |kind, var_span| {
borrow_spans.var_subdiag(self.dcx(), &mut err, Some(borrow.kind), |kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
let place = &borrow.borrowed_place;
let desc_place = self.describe_any_place(place.as_ref());
Expand Down Expand Up @@ -1043,7 +1053,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
"mutably borrow",
);
borrow_spans.var_subdiag(
None,
self.dcx(),
&mut err,
Some(BorrowKind::Mut { kind: MutBorrowKind::ClosureCapture }),
|kind, var_span| {
Expand Down Expand Up @@ -1131,22 +1141,31 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
};

if issued_spans == borrow_spans {
borrow_spans.var_subdiag(None, &mut err, Some(gen_borrow_kind), |kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
match kind {
hir::ClosureKind::Coroutine(_) => BorrowUsePlaceCoroutine {
place: desc_place,
var_span,
is_single_var: false,
},
hir::ClosureKind::Closure | hir::ClosureKind::CoroutineClosure(_) => {
BorrowUsePlaceClosure { place: desc_place, var_span, is_single_var: false }
borrow_spans.var_subdiag(
self.dcx(),
&mut err,
Some(gen_borrow_kind),
|kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
match kind {
hir::ClosureKind::Coroutine(_) => BorrowUsePlaceCoroutine {
place: desc_place,
var_span,
is_single_var: false,
},
hir::ClosureKind::Closure | hir::ClosureKind::CoroutineClosure(_) => {
BorrowUsePlaceClosure {
place: desc_place,
var_span,
is_single_var: false,
}
}
}
}
});
},
);
} else {
issued_spans.var_subdiag(
Some(self.dcx()),
self.dcx(),
&mut err,
Some(issued_borrow.kind),
|kind, var_span| {
Expand All @@ -1165,7 +1184,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
);

borrow_spans.var_subdiag(
Some(self.dcx()),
self.dcx(),
&mut err,
Some(gen_borrow_kind),
|kind, var_span| {
Expand Down Expand Up @@ -2217,7 +2236,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
err.span_label(borrow_span, "borrowed value does not live long enough");
err.span_label(drop_span, format!("`{name}` dropped here while still borrowed"));

borrow_spans.args_subdiag(&mut err, |args_span| {
borrow_spans.args_subdiag(self.dcx(), &mut err, |args_span| {
crate::session_diagnostics::CaptureArgLabel::Capture {
is_within: borrow_spans.for_coroutine(),
args_span,
Expand Down Expand Up @@ -2476,7 +2495,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
None,
);

borrow_spans.args_subdiag(&mut err, |args_span| {
borrow_spans.args_subdiag(self.dcx(), &mut err, |args_span| {
crate::session_diagnostics::CaptureArgLabel::Capture {
is_within: borrow_spans.for_coroutine(),
args_span,
Expand Down Expand Up @@ -2935,7 +2954,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {
"assign",
);

loan_spans.var_subdiag(None, &mut err, Some(loan.kind), |kind, var_span| {
loan_spans.var_subdiag(self.dcx(), &mut err, Some(loan.kind), |kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
match kind {
hir::ClosureKind::Coroutine(_) => BorrowUseInCoroutine { var_span },
Expand All @@ -2953,7 +2972,7 @@ impl<'cx, 'tcx> MirBorrowckCtxt<'cx, 'tcx> {

let mut err = self.cannot_assign_to_borrowed(span, loan_span, &descr_place);

loan_spans.var_subdiag(None, &mut err, Some(loan.kind), |kind, var_span| {
loan_spans.var_subdiag(self.dcx(), &mut err, Some(loan.kind), |kind, var_span| {
use crate::session_diagnostics::CaptureVarCause::*;
match kind {
hir::ClosureKind::Coroutine(_) => BorrowUseInCoroutine { var_span },
Expand Down
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