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lint: port enum intrinsics diagnostics

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Signed-off-by: David Wood <david.wood@huawei.com>
This commit is contained in:
David Wood 2022-06-27 14:08:02 +01:00
parent 0f4c4c5e18
commit 2a69640eb2
2 changed files with 15 additions and 23 deletions
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8
compiler/rustc_error_messages/locales/en-US/lint.ftl
View File

@ -4,3 +4,11 @@ lint-array-into-iter =
.remove-into-iter-suggestion = or remove `.into_iter()` to iterate by value
.use-explicit-into-iter-suggestion =
or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
lint-enum-intrinsics-mem-discriminant =
the return value of `mem::discriminant` is unspecified when called with a non-enum type
.note = the argument to `discriminant` should be a reference to an enum, but it was passed a reference to a `{$ty_param}`, which is not an enum.
lint-enum-intrinsics-mem-variant =
the return value of `mem::variant_count` is unspecified when called with a non-enum type
.note = the type parameter of `variant_count` should be an enum, but it was instantiated with the type `{$ty_param}`, which is not an enum.

30
compiler/rustc_lint/src/enum_intrinsics_non_enums.rs
View File

@ -1,4 +1,5 @@
use crate::{context::LintContext, LateContext, LateLintPass};
use rustc_errors::fluent;
use rustc_hir as hir;
use rustc_middle::ty::{fold::TypeFoldable, Ty};
use rustc_span::{symbol::sym, Span};
@ -51,19 +52,9 @@ fn enforce_mem_discriminant(
if is_non_enum(ty_param) {
cx.struct_span_lint(ENUM_INTRINSICS_NON_ENUMS, expr_span, |builder| {
builder
.build(
"the return value of `mem::discriminant` is \
unspecified when called with a non-enum type",
)
.span_note(
args_span,
&format!(
"the argument to `discriminant` should be a \
reference to an enum, but it was passed \
a reference to a `{}`, which is not an enum.",
ty_param,
),
)
.build(fluent::lint::enum_intrinsics_mem_discriminant)
.set_arg("ty_param", ty_param)
.span_note(args_span, fluent::lint::note)
.emit();
});
}
@ -74,16 +65,9 @@ fn enforce_mem_variant_count(cx: &LateContext<'_>, func_expr: &hir::Expr<'_>, sp
if is_non_enum(ty_param) {
cx.struct_span_lint(ENUM_INTRINSICS_NON_ENUMS, span, |builder| {
builder
.build(
"the return value of `mem::variant_count` is \
unspecified when called with a non-enum type",
)
.note(&format!(
"the type parameter of `variant_count` should \
be an enum, but it was instantiated with \
the type `{}`, which is not an enum.",
ty_param,
))
.build(fluent::lint::enum_intrinsics_mem_variant)
.set_arg("ty_param", ty_param)
.note(fluent::lint::note)
.emit();
});
}