pub fn walk_exprs(e: &Expr, f: &mut impl FnMut(&Expr))Expand description
v0.22b: pre-order expression visitor — visits e, then every
sub-expression, including statements and tails of nested blocks. Driven by
ast::expr_children, the exhaustive total child iterator, rather than a
hand-matched recursion duplicating it — a new ExprKind variant fails to
compile in expr_children until it is taught to visit it, instead of
silently under-visiting here.