Struct rustc_trait_selection::traits::on_unimplemented::OnUnimplementedDirective

pub struct OnUnimplementedDirective {
    pub condition: Option<MetaItem>,
    pub subcommands: Vec<OnUnimplementedDirective>,
    pub message: Option<OnUnimplementedFormatString>,
    pub label: Option<OnUnimplementedFormatString>,
    pub note: Option<OnUnimplementedFormatString>,
    pub parent_label: Option<OnUnimplementedFormatString>,
    pub append_const_msg: Option<Option<Symbol>>,
}

Fields

condition: Option<MetaItem>

subcommands: Vec<OnUnimplementedDirective>

message: Option<OnUnimplementedFormatString>

label: Option<OnUnimplementedFormatString>

note: Option<OnUnimplementedFormatString>

parent_label: Option<OnUnimplementedFormatString>

append_const_msg: Option<Option<Symbol>>

Implementations

impl<'tcx> OnUnimplementedDirective

fn parse(
    tcx: TyCtxt<'tcx>,
    item_def_id: DefId,
    items: &[NestedMetaItem],
    span: Span,
    is_root: bool
) -> Result<Self, ErrorGuaranteed>

pub fn of_item(
    tcx: TyCtxt<'tcx>,
    item_def_id: DefId
) -> Result<Option<Self>, ErrorGuaranteed>

pub fn evaluate(
    &self,
    tcx: TyCtxt<'tcx>,
    trait_ref: TraitRef<'tcx>,
    options: &[(Symbol, Option<String>)]
) -> OnUnimplementedNote

Trait Implementations

impl Debug for OnUnimplementedDirective

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 144 bytes