annotate

pub fn annotate(gpa: Allocator, arena: Allocator, tree: Ast) Allocator.Error!RlNeededSet {
    var astrl: AstRlAnnotate = .{
        .gpa = gpa,
        .arena = arena,
        .tree = &tree,
    };
    defer astrl.deinit(gpa);

    if (tree.errors.len != 0) {
        // We can't perform analysis on a broken AST. AstGen will not run in
        // this case.
        return .{};
    }

    for (tree.containerDeclRoot().ast.members) |member_node| {
        _ = try astrl.expr(member_node, null, ResultInfo.none);
    }

    return astrl.nodes_need_rl.move();
}