rust/compiler/rustc_monomorphize/src/errors.rs
Nicholas Nethercote f6f8779843 Reduce capabilities of Diagnostic.
Currently many diagnostic modifier methods are available on both
`Diagnostic` and `DiagnosticBuilder`. This commit removes most of them
from `Diagnostic`. To minimize the diff size, it keeps them within
`diagnostic.rs` but changes the surrounding `impl Diagnostic` block to
`impl DiagnosticBuilder`. (I intend to move things around later, to give
a more sensible code layout.)

`Diagnostic` keeps a few methods that it still needs, like `sub`,
`arg`, and `replace_args`.

The `forward!` macro, which defined two additional methods per call
(e.g. `note` and `with_note`), is replaced by the `with_fn!` macro,
which defines one additional method per call (e.g. `with_note`). It's
now also only used when necessary -- not all modifier methods currently
need a `with_*` form. (New ones can be easily added as necessary.)

All this also requires changing `trait AddToDiagnostic` so its methods
take `DiagnosticBuilder` instead of `Diagnostic`, which leads to many
mechanical changes. `SubdiagnosticMessageOp` gains a type parameter `G`.

There are three subdiagnostics -- `DelayedAtWithoutNewline`,
`DelayedAtWithNewline`, and `InvalidFlushedDelayedDiagnosticLevel` --
that are created within the diagnostics machinery and appended to
external diagnostics. These are handled at the `Diagnostic` level, which
means it's now hard to construct them via `derive(Diagnostic)`, so
instead we construct them by hand. This has no effect on what they look
like when printed.

There are lots of new `allow` markers for `untranslatable_diagnostics`
and `diagnostics_outside_of_impl`. This is because
`#[rustc_lint_diagnostics]` annotations were present on the `Diagnostic`
modifier methods, but missing from the `DiagnosticBuilder` modifier
methods. They're now present.
2024-02-20 13:22:17 +11:00

108 lines
2.9 KiB
Rust

use std::path::PathBuf;
use crate::fluent_generated as fluent;
use rustc_errors::{DiagCtxt, DiagnosticBuilder, EmissionGuarantee, IntoDiagnostic, Level};
use rustc_macros::{Diagnostic, LintDiagnostic};
use rustc_span::{Span, Symbol};
#[derive(Diagnostic)]
#[diag(monomorphize_recursion_limit)]
pub struct RecursionLimit {
#[primary_span]
pub span: Span,
pub shrunk: String,
#[note]
pub def_span: Span,
pub def_path_str: String,
#[note(monomorphize_written_to_path)]
pub was_written: Option<()>,
pub path: PathBuf,
}
#[derive(Diagnostic)]
#[diag(monomorphize_type_length_limit)]
#[help(monomorphize_consider_type_length_limit)]
pub struct TypeLengthLimit {
#[primary_span]
pub span: Span,
pub shrunk: String,
#[note(monomorphize_written_to_path)]
pub was_written: Option<()>,
pub path: PathBuf,
pub type_length: usize,
}
#[derive(Diagnostic)]
#[diag(monomorphize_no_optimized_mir)]
pub struct NoOptimizedMir {
#[note]
pub span: Span,
pub crate_name: Symbol,
}
pub struct UnusedGenericParamsHint {
pub span: Span,
pub param_spans: Vec<Span>,
pub param_names: Vec<String>,
}
impl<G: EmissionGuarantee> IntoDiagnostic<'_, G> for UnusedGenericParamsHint {
#[track_caller]
fn into_diagnostic(self, dcx: &'_ DiagCtxt, level: Level) -> DiagnosticBuilder<'_, G> {
let mut diag =
DiagnosticBuilder::new(dcx, level, fluent::monomorphize_unused_generic_params);
diag.span(self.span);
for (span, name) in self.param_spans.into_iter().zip(self.param_names) {
// FIXME: I can figure out how to do a label with a fluent string with a fixed message,
// or a label with a dynamic value in a hard-coded string, but I haven't figured out
// how to combine the two. 😢
#[allow(rustc::untranslatable_diagnostic)]
diag.span_label(span, format!("generic parameter `{name}` is unused"));
}
diag
}
}
#[derive(LintDiagnostic)]
#[diag(monomorphize_large_assignments)]
#[note]
pub struct LargeAssignmentsLint {
#[label]
pub span: Span,
pub size: u64,
pub limit: u64,
}
#[derive(Diagnostic)]
#[diag(monomorphize_symbol_already_defined)]
pub struct SymbolAlreadyDefined {
#[primary_span]
pub span: Option<Span>,
pub symbol: String,
}
#[derive(Diagnostic)]
#[diag(monomorphize_couldnt_dump_mono_stats)]
pub struct CouldntDumpMonoStats {
pub error: String,
}
#[derive(Diagnostic)]
#[diag(monomorphize_encountered_error_while_instantiating)]
pub struct EncounteredErrorWhileInstantiating {
#[primary_span]
pub span: Span,
pub formatted_item: String,
}
#[derive(Diagnostic)]
#[diag(monomorphize_start_not_found)]
#[help]
pub struct StartNotFound;
#[derive(Diagnostic)]
#[diag(monomorphize_unknown_cgu_collection_mode)]
pub struct UnknownCguCollectionMode<'a> {
pub mode: &'a str,
}