//! - Example: Examine each expression to look for its type and do some check or other.
//! - How: Implement `intravisit::Visitor` and override the `NestedFilter` type to
//! `nested_filter::OnlyBodies` (and implement `nested_visit_map`), and use
//! - Example: Examine each expression to look for its type and do some check or other.
//! - How: Implement `intravisit::Visitor` and override the `NestedFilter` type to
//! `nested_filter::OnlyBodies` (and implement `nested_visit_map`), and use
//! `intravisit::Visitor` impl, implement methods like `visit_expr()` (don't forget to invoke
//! `intravisit::walk_expr()` to keep walking the subparts).
//! - Pro: Visitor methods for any kind of HIR node, not just item-like things.
//! `intravisit::Visitor` impl, implement methods like `visit_expr()` (don't forget to invoke
//! `intravisit::walk_expr()` to keep walking the subparts).
//! - Pro: Visitor methods for any kind of HIR node, not just item-like things.
/// (this is why the module is called `intravisit`, to distinguish it
/// from the AST's `visit` module, which acts differently). If you
/// simply want to visit all items in the crate in some order, you
/// (this is why the module is called `intravisit`, to distinguish it
/// from the AST's `visit` module, which acts differently). If you
/// simply want to visit all items in the crate in some order, you
/// on `visit_nested_item` for details on how to visit nested items.
///
/// If you want to ensure that your code handles every variant
/// on `visit_nested_item` for details on how to visit nested items.
///
/// If you want to ensure that your code handles every variant