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Rollup merge of #107489 - compiler-errors:non_lifetime_binders, r=cjgillot

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Implement partial support for non-lifetime binders

This implements support for non-lifetime binders. It's pretty useless currently, but I wanted to put this up so the implementation can be discussed.

Specifically, this piggybacks off of the late-bound lifetime collection code in `rustc_hir_typeck::collect::lifetimes`. This seems like a necessary step given the fact we don't resolve late-bound regions until this point, and binders are sometimes merged.

Q: I'm not sure if I should go along this route, or try to modify the earlier nameres code to compute the right bound var indices for type and const binders eagerly... If so, I'll need to rename all these queries to something more appropriate (I've done this for `resolve_lifetime::Region` -> `resolve_lifetime::ResolvedArg`)

cc rust-lang/types-team#81

r? `@ghost`
This commit is contained in:
Matthias Krüger 2023-02-17 00:19:34 +01:00 • committed by GitHub
commit 089e8c03bc
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48 changed files with 709 additions and 343 deletions
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22
compiler/rustc_session/src/errors.rs
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@ -4,7 +4,7 @@ use crate::cgu_reuse_tracker::CguReuse;
use crate::parse::ParseSess;
use rustc_ast::token;
use rustc_ast::util::literal::LitError;
use rustc_errors::MultiSpan;
use rustc_errors::{error_code, DiagnosticMessage, EmissionGuarantee, IntoDiagnostic, MultiSpan};
use rustc_macros::Diagnostic;
use rustc_span::{Span, Symbol};
use rustc_target::spec::{SplitDebuginfo, StackProtector, TargetTriple};
@ -27,12 +27,22 @@ pub struct CguNotRecorded<'a> {
pub cgu_name: &'a str,
}
#[derive(Diagnostic)]
#[diag(session_feature_gate_error, code = "E0658")]
pub struct FeatureGateError<'a> {
#[primary_span]
pub struct FeatureGateError {
pub span: MultiSpan,
pub explain: &'a str,
pub explain: DiagnosticMessage,
}
impl<'a, T: EmissionGuarantee> IntoDiagnostic<'a, T> for FeatureGateError {
#[track_caller]
fn into_diagnostic(
self,
handler: &'a rustc_errors::Handler,
) -> rustc_errors::DiagnosticBuilder<'a, T> {
let mut diag = handler.struct_diagnostic(self.explain);
diag.set_span(self.span);
diag.code(error_code!(E0658));
diag
}
}
#[derive(Subdiagnostic)]