Struct DiagMetadata

struct DiagMetadata<'ast> {

    current_trait_assoc_items: Option<&'ast [P<AssocItem>]>,
    current_self_type: Option<Ty>,
    current_self_item: Option<NodeId>,
    current_item: Option<&'ast Item>,
    currently_processing_generic_args: bool,
    current_function: Option<(FnKind<'ast>, Span)>,
    unused_labels: FxHashMap<NodeId, Span>,
    current_block_could_be_bare_struct_literal: Option<Span>,
    current_let_binding: Option<(Span, Option<Span>, Option<Span>)>,
    current_pat: Option<&'ast Pat>,
    in_if_condition: Option<&'ast Expr>,
    in_assignment: Option<&'ast Expr>,
    is_assign_rhs: bool,
    in_non_gat_assoc_type: Option<bool>,
    in_range: Option<(&'ast Expr, &'ast Expr)>,
    current_trait_object: Option<&'ast [GenericBound]>,
    current_where_predicate: Option<&'ast WherePredicate>,
    current_type_path: Option<&'ast Ty>,
    current_impl_items: Option<&'ast [P<AssocItem>]>,
    currently_processing_impl_trait: Option<(TraitRef, Ty)>,
    current_elision_failures: Vec<MissingLifetime>,
}

Fields

current_trait_assoc_items: Option<&'ast [P<AssocItem>]>

The current trait’s associated items’ ident, used for diagnostic suggestions.

current_self_type: Option<Ty>

The current self type if inside an impl (used for better errors).

current_self_item: Option<NodeId>

The current self item if inside an ADT (used for better errors).

current_item: Option<&'ast Item>

The current trait (used to suggest).

currently_processing_generic_args: bool

When processing generic arguments and encountering an unresolved ident not found, suggest introducing a type or const param depending on the context.

current_function: Option<(FnKind<'ast>, Span)>

The current enclosing (non-closure) function (used for better errors).

unused_labels: FxHashMap<NodeId, Span>

A list of labels as of yet unused. Labels will be removed from this map when they are used (in a break or continue statement)

current_block_could_be_bare_struct_literal: Option<Span>

Only used for better errors on let x = { foo: bar };. In the case of a parse error with let x = { foo: bar, };, this isn’t needed, it’s only needed for cases where this parses as a correct type ascription.

current_let_binding: Option<(Span, Option<Span>, Option<Span>)>

Only used for better errors on let <pat>: <expr, not type>;.

current_pat: Option<&'ast Pat>

in_if_condition: Option<&'ast Expr>

Used to detect possible if let written without let and to provide structured suggestion.

in_assignment: Option<&'ast Expr>

Used to detect possible new binding written without let and to provide structured suggestion.

is_assign_rhs: bool

in_non_gat_assoc_type: Option<bool>

If we are setting an associated type in trait impl, is it a non-GAT type?

in_range: Option<(&'ast Expr, &'ast Expr)>

Used to detect possible . -> .. typo when calling methods.

current_trait_object: Option<&'ast [GenericBound]>

If we are currently in a trait object definition. Used to point at the bounds when encountering a struct or enum.

current_where_predicate: Option<&'ast WherePredicate>

Given where <T as Bar>::Baz: String, suggest where T: Bar<Baz = String>.

current_type_path: Option<&'ast Ty>

current_impl_items: Option<&'ast [P<AssocItem>]>

The current impl items (used to suggest).

currently_processing_impl_trait: Option<(TraitRef, Ty)>

When processing impl trait

current_elision_failures: Vec<MissingLifetime>

Accumulate the errors due to missed lifetime elision, and report them all at once for each function.

Trait Implementations

impl<'ast> Default for DiagMetadata<'ast>

fn default() -> DiagMetadata<'ast>

Returns the “default value” for a type.

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: 440 bytes