bjoernager/rust
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Rollup merge of #131034 - Urgau:cfg-true-false, r=nnethercote

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Implement RFC3695 Allow boolean literals as cfg predicates

This PR implements https://github.com/rust-lang/rfcs/pull/3695: allow boolean literals as cfg predicates, i.e. `cfg(true)` and `cfg(false)`.

r? `@nnethercote` *(or anyone with parser knowledge)*
cc `@clubby789`
This commit is contained in:
Guillaume Gomez 2024-10-04 15:42:53 +02:00 • committed by GitHub
commit 2ceeeb159d
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GPG key ID: B5690EEEBB952194
26 changed files with 284 additions and 58 deletions
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10
compiler/rustc_trait_selection/src/error_reporting/traits/on_unimplemented.rs
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@ -1,7 +1,7 @@
use std::iter;
use std::path::PathBuf;
use rustc_ast::{AttrArgs, AttrArgsEq, AttrKind, Attribute, MetaItem, NestedMetaItem};
use rustc_ast::{AttrArgs, AttrArgsEq, AttrKind, Attribute, NestedMetaItem};
use rustc_data_structures::fx::FxHashMap;
use rustc_errors::codes::*;
use rustc_errors::{ErrorGuaranteed, struct_span_code_err};
@ -282,7 +282,7 @@ pub struct OnUnimplementedFormatString {
#[derive(Debug)]
pub struct OnUnimplementedDirective {
pub condition: Option<MetaItem>,
pub condition: Option<NestedMetaItem>,
pub subcommands: Vec<OnUnimplementedDirective>,
pub message: Option<OnUnimplementedFormatString>,
pub label: Option<OnUnimplementedFormatString>,
@ -414,7 +414,7 @@ impl<'tcx> OnUnimplementedDirective {
let cond = item_iter
.next()
.ok_or_else(|| tcx.dcx().emit_err(EmptyOnClauseInOnUnimplemented { span }))?
.meta_item()
.meta_item_or_bool()
.ok_or_else(|| tcx.dcx().emit_err(InvalidOnClauseInOnUnimplemented { span }))?;
attr::eval_condition(cond, &tcx.sess, Some(tcx.features()), &mut |cfg| {
if let Some(value) = cfg.value
@ -558,8 +558,8 @@ impl<'tcx> OnUnimplementedDirective {
IgnoredDiagnosticOption::maybe_emit_warning(
tcx,
item_def_id,
directive.condition.as_ref().map(|i| i.span),
aggr.condition.as_ref().map(|i| i.span),
directive.condition.as_ref().map(|i| i.span()),
aggr.condition.as_ref().map(|i| i.span()),
"condition",
);
IgnoredDiagnosticOption::maybe_emit_warning(