struct StatCollector<'k> {
    krate: Option<Map<'k>>,
    nodes: FxHashMap<&'static str, Node>,
    seen: FxHashSet<Id>,
}
Expand description

This type measures the size of AST and HIR nodes, by implementing the AST and HIR Visitor traits. But we don’t measure every visited type because that could cause double counting.

For example, ast::Visitor has visit_ident, but Idents are always stored inline within other AST nodes, so we don’t implement visit_ident here. In contrast, we do implement visit_expr because ast::Expr is always stored as P<ast::Expr>, and every such expression should be measured separately.

In general, a visit_foo method should be implemented here if the corresponding Foo type is always stored on its own, e.g.: P<Foo>, Box<Foo>, Vec<Foo>, Box<[Foo]>.

There are some types in the AST and HIR tree that the visitors do not have a visit_* method for, and so we cannot measure these, which is unfortunate.

Fields

krate: Option<Map<'k>>nodes: FxHashMap<&'static str, Node>seen: FxHashSet<Id>

Implementations

Trait Implementations

Invoked when a nested item is encountered. By default, when Self::NestedFilter is nested_filter::None, this method does nothing. You probably don’t want to override this method – instead, override Self::NestedFilter or use the “shallow” or “deep” visit patterns described on itemlikevisit::ItemLikeVisitor. The only reason to override this method is if you want a nested pattern but cannot supply a Map; see nested_visit_map for advice. Read more
Like visit_nested_item(), but for trait items. See visit_nested_item() for advice on when to override this method. Read more
Like visit_nested_item(), but for impl items. See visit_nested_item() for advice on when to override this method. Read more
Like visit_nested_item(), but for foreign items. See visit_nested_item() for advice on when to override this method. Read more
Invoked to visit the body of a function, method or closure. Like visit_nested_item, does nothing by default unless you override Self::NestedFilter. Read more
Visits the top-level item and (optionally) nested items / impl items. See visit_nested_item for details. Read more
Override this type to control which nested HIR are visited; see NestedFilter for details. If you override this type, you must also override nested_visit_map. Read more
If type NestedFilter is set to visit nested items, this method must also be overridden to provide a map to retrieve nested items. Read more
source

fn visit_expr_post(&mut self, _ex: &'ast Expr)

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

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: 72 bytes