bjoernager/rust
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Improve internal representation of check-cfg

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This is done to simplify to relationship between names() and values()
but also make thing clearer (having an Any to represent that any values
are allowed) but also to allow the (none) + values expected cases that
wasn't possible before.
This commit is contained in:
Urgau 2023-04-30 14:43:59 +02:00
parent ad6f4b73eb
commit d327d5b168
5 changed files with 173 additions and 153 deletions
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14
compiler/rustc_lint/src/context.rs
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@ -769,10 +769,7 @@ pub trait LintContext: Sized {
db.note("see the asm section of Rust By Example <https://doc.rust-lang.org/nightly/rust-by-example/unsafe/asm.html#labels> for more information");
},
BuiltinLintDiagnostics::UnexpectedCfg((name, name_span), None) => {
let Some(names_valid) = &sess.parse_sess.check_config.names_valid else {
bug!("it shouldn't be possible to have a diagnostic on a name if name checking is not enabled");
};
let possibilities: Vec<Symbol> = names_valid.iter().map(|s| *s).collect();
let possibilities: Vec<Symbol> = sess.parse_sess.check_config.expecteds.keys().map(|s| *s).collect();
// Suggest the most probable if we found one
if let Some(best_match) = find_best_match_for_name(&possibilities, name, None) {
@ -780,10 +777,15 @@ pub trait LintContext: Sized {
}
},
BuiltinLintDiagnostics::UnexpectedCfg((name, name_span), Some((value, value_span))) => {
let Some(values) = &sess.parse_sess.check_config.values_valid.get(&name) else {
let Some(rustc_session::config::ExpectedValues::Some(values)) = &sess.parse_sess.check_config.expecteds.get(&name) else {
bug!("it shouldn't be possible to have a diagnostic on a value whose name is not in values");
};
let possibilities: Vec<Symbol> = values.iter().map(|&s| s).collect();
let mut have_none_possibility = false;
let possibilities: Vec<Symbol> = values.iter()
.inspect(|a| have_none_possibility |= a.is_none())
.copied()
.filter_map(std::convert::identity)
.collect();
// Show the full list if all possible values for a given name, but don't do it
// for names as the possibilities could be very long