Struct DefCollector

struct DefCollector<'a, 'ra, 'tcx> {
    resolver: &'a mut Resolver<'ra, 'tcx>,
    parent_def: LocalDefId,
    pending_anon_const_info: Option<PendingAnonConstInfo>,
    impl_trait_context: ImplTraitContext,
    in_attr: bool,
    expansion: LocalExpnId,
}

Creates DefIds for nodes in the AST.

Fields

resolver: &'a mut Resolver<'ra, 'tcx>

parent_def: LocalDefId

pending_anon_const_info: Option<PendingAnonConstInfo>

If we have an anon const that consists of a macro invocation, e.g. Foo<{ m!() }>, we need to wait until we know what the macro expands to before we create the def for the anon const. That’s because we lower some anon consts into hir::ConstArgKind::Path, which don’t have defs.

See Self::visit_anon_const().

impl_trait_context: ImplTraitContext

in_attr: bool

expansion: LocalExpnId

Implementations

impl<'a, 'ra, 'tcx> DefCollector<'a, 'ra, 'tcx>

fn create_def( &mut self, node_id: NodeId, name: Symbol, def_kind: DefKind, span: Span, ) -> LocalDefId

fn with_parent<F: FnOnce(&mut Self)>(&mut self, parent_def: LocalDefId, f: F)

fn with_impl_trait<F: FnOnce(&mut Self)>( &mut self, impl_trait_context: ImplTraitContext, f: F, )

fn collect_field(&mut self, field: &'a FieldDef, index: Option<usize>)

fn visit_macro_invoc(&mut self, id: NodeId)

fn is_const_arg_trivial_macro_expansion( &self, anon_const: &'a AnonConst, ) -> Option<(PendingAnonConstInfo, NodeId)>

Determines whether the const argument AnonConst is a simple macro call, optionally surrounded with braces.

If this const argument is a trivial macro call then the id for the macro call is returned along with the information required to build the anon const’s def if the macro call expands to a non-trivial expression.

fn is_const_arg_sub_expr_trivial_macro_expansion( &self, const_arg_sub_expr: &'a Expr, ) -> Option<(PendingAnonConstInfo, NodeId)>

Determines whether the expression const_arg_sub_expr is a simple macro call, sometimes surrounded with braces if a set of braces has not already been entered. This is required as { N } is treated as equivalent to a bare parameter N whereas {{ N }} is treated as a real block expression and is lowered to an anonymous constant which is not allowed to use generic parameters.

If this expression is a trivial macro call then the id for the macro call is returned along with the information required to build the anon const’s def if the macro call expands to a non-trivial expression.

Trait Implementations

impl<'a, 'ra, 'tcx> Visitor<'a> for DefCollector<'a, 'ra, 'tcx>

fn visit_item(&mut self, i: &'a Item)

fn visit_fn(&mut self, fn_kind: FnKind<'a>, span: Span, _: NodeId)

fn visit_use_tree(&mut self, use_tree: &'a UseTree, id: NodeId, _nested: bool)

fn visit_foreign_item(&mut self, fi: &'a ForeignItem)

fn visit_variant(&mut self, v: &'a Variant)

fn visit_variant_data(&mut self, data: &'a VariantData)

fn visit_generic_param(&mut self, param: &'a GenericParam)

fn visit_assoc_item(&mut self, i: &'a AssocItem, ctxt: AssocCtxt)

fn visit_pat(&mut self, pat: &'a Pat)

fn visit_anon_const(&mut self, constant: &'a AnonConst)

fn visit_expr(&mut self, expr: &'a Expr)

fn visit_ty(&mut self, ty: &'a Ty)

fn visit_stmt(&mut self, stmt: &'a Stmt)

fn visit_arm(&mut self, arm: &'a Arm)

fn visit_expr_field(&mut self, f: &'a ExprField)

fn visit_pat_field(&mut self, fp: &'a PatField)

fn visit_param(&mut self, p: &'a Param)

fn visit_field_def(&mut self, field: &'a FieldDef)

fn visit_crate(&mut self, krate: &'a Crate)

fn visit_attribute(&mut self, attr: &'a Attribute) -> Self::Result

type Result = ()

The result type of the visit_* methods. Can be either (), or ControlFlow<T>.

fn visit_ident(&mut self, _ident: &'ast Ident) -> Self::Result

fn visit_local(&mut self, l: &'ast Local) -> Self::Result

fn visit_block(&mut self, b: &'ast Block) -> Self::Result

fn visit_method_receiver_expr(&mut self, ex: &'ast Expr) -> Self::Result

This method is a hack to workaround unstable of stmt_expr_attributes. It can be removed once that feature is stabilized.

fn visit_generics(&mut self, g: &'ast Generics) -> Self::Result

fn visit_closure_binder(&mut self, b: &'ast ClosureBinder) -> Self::Result

fn visit_where_predicate(&mut self, p: &'ast WherePredicate) -> Self::Result

fn visit_trait_ref(&mut self, t: &'ast TraitRef) -> Self::Result

fn visit_param_bound( &mut self, bounds: &'ast GenericBound, _ctxt: BoundKind, ) -> Self::Result

fn visit_precise_capturing_arg(&mut self, arg: &'ast PreciseCapturingArg)

fn visit_poly_trait_ref(&mut self, t: &'ast PolyTraitRef) -> Self::Result

fn visit_enum_def(&mut self, enum_definition: &'ast EnumDef) -> Self::Result

fn visit_variant_discr(&mut self, discr: &'ast AnonConst) -> Self::Result

fn visit_label(&mut self, label: &'ast Label) -> Self::Result

fn visit_lifetime( &mut self, lifetime: &'ast Lifetime, _: LifetimeCtxt, ) -> Self::Result

fn visit_mac_call(&mut self, mac: &'ast MacCall) -> Self::Result

fn visit_mac_def(&mut self, _mac: &'ast MacroDef, _id: NodeId) -> Self::Result

fn visit_path(&mut self, path: &'ast Path, _id: NodeId) -> Self::Result

fn visit_path_segment( &mut self, path_segment: &'ast PathSegment, ) -> Self::Result

fn visit_generic_args( &mut self, generic_args: &'ast GenericArgs, ) -> Self::Result

fn visit_generic_arg(&mut self, generic_arg: &'ast GenericArg) -> Self::Result

fn visit_assoc_item_constraint( &mut self, constraint: &'ast AssocItemConstraint, ) -> Self::Result

fn visit_vis(&mut self, vis: &'ast Visibility) -> Self::Result

fn visit_fn_ret_ty(&mut self, ret_ty: &'ast FnRetTy) -> Self::Result

fn visit_fn_header(&mut self, _header: &'ast FnHeader) -> Self::Result

fn visit_inline_asm(&mut self, asm: &'ast InlineAsm) -> Self::Result

fn visit_format_args(&mut self, fmt: &'ast FormatArgs) -> Self::Result

fn visit_inline_asm_sym(&mut self, sym: &'ast InlineAsmSym) -> Self::Result

fn visit_capture_by(&mut self, _capture_by: &'ast CaptureBy) -> Self::Result

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: 40 bytes