skeleton_top_node.hpp

// Copyright Take Vos 2020-2021.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "skeleton_node.hpp"
#include "../macros.hpp"
 
namespace hi::inline v1 {
 
struct skeleton_top_node final : skeleton_node {
    statement_vector children;
 
    skeleton_top_node(parse_location location) : skeleton_node(std::move(location)), children() {}

    bool append(std::unique_ptr<skeleton_node> x) noexcept override
    {
        append_child(children, std::move(x));
        return true;
    }
 
    void post_process(formula_post_process_context &context) override
    {
        if (ssize(children) > 0) {
            children.back()->left_align();
        }
 
        for (hilet &child : children) {
            child->post_process(context);
        }
    }
 
    datum evaluate(formula_evaluation_context &context) override
    {
        try {
            return evaluate_children(context, children);
 
        } catch (std::exception const &e) {
            throw operation_error(std::format("{}: Could not evaluate.\n{}", location, e.what()));
        }
    }
 
    std::string string() const noexcept override
    {
        hilet children_str = transform<std::vector<std::string>>(children, [](hilet &x) {
            return x->string();
        });
        return std::format("<top {}>", join(children_str));
    }
};
 
} // namespace hi::inline v1