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/* Classes for creating XML trees by appending.
Copyright (C) 2025 Free Software Foundation, Inc.
Contributed by David Malcolm <dmalcolm@redhat.com>.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#ifndef GCC_XML_PRINTER_H
#define GCC_XML_PRINTER_H
namespace xml {
class node;
class element;
/* A class for creating XML trees by appending to an insertion
point, with a stack of open tags. */
class printer
{
public:
printer (element &insertion_point, bool check_popped_tags = true);
void push_tag (std::string name,
bool preserve_whitespace = false);
void push_tag_with_class (std::string name,
std::string class_,
bool preserve_whitespace = false);
void pop_tag (const char *expected_name);
void set_attr (const char *name, std::string value);
void add_text (std::string text);
void add_text_from_pp (pretty_printer &pp);
void add_raw (std::string text);
void push_element (std::unique_ptr<element> new_element);
void append (std::unique_ptr<node> new_node);
element *get_insertion_point () const;
size_t get_num_open_tags () const { return m_open_tags.size (); }
void DEBUG_FUNCTION dump () const;
private:
// borrowed ptrs:
std::vector<element *> m_open_tags;
bool m_check_popped_tags;
};
/* RAII class for ensuring that the tags nested correctly.
Verify that within an instance's lifetime that any pushes
to the printer's insertion point have been popped by the end. */
class auto_check_tag_nesting
{
public:
auto_check_tag_nesting (const printer &xp)
: m_xp (xp),
m_initial_insertion_element (xp.get_insertion_point ())
{
}
~auto_check_tag_nesting ()
{
/* Verify that we didn't pop too many tags within the printer,
or leave any tags open. */
gcc_assert (m_initial_insertion_element == m_xp.get_insertion_point ());
}
private:
const printer &m_xp;
const element *m_initial_insertion_element;
};
// RAII for push/pop element on xml::printer
class auto_print_element
{
public:
auto_print_element (printer &printer,
std::string name,
bool preserve_whitespace = false)
: m_printer (printer),
m_name (std::move (name))
{
m_printer.push_tag (m_name, preserve_whitespace);
}
~auto_print_element ()
{
m_printer.pop_tag (m_name.c_str ());
}
private:
printer &m_printer;
std::string m_name;
};
} // namespace xml
#endif /* GCC_XML_PRINTER_H. */
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