Variant Utils

Variant Utils module provides functions to operate Luna::Variant objects.

Functions

• Variant diff(const Variant &before, const Variant &after)

  Creates one delta variant that stores changes from before to after.

• void patch(Variant &before, const Variant &delta)

  Applys the difference to the variant, so that it contains the same data as after when the diff object is created.

• void revert(Variant &after, const Variant &delta)

  Reverts the difference made in after, so that it contains the same data as before when the diff object is created.

• void add_diff_prefix(Variant &delta, Span< const Variant > prefix_nodes)

  Adds prefix nodes to the delta object.

• R< Variant > read_json(const c8 *src, usize src_size=USIZE_MAX)

  Parses one JSON string.

• R< Variant > read_json(IStream *stream)

  Parses one JSON string.

• String write_json(const Variant &v, bool indent=true)

  Writes one variant object to JSON string.

• RV write_json(IStream *stream, const Variant &v, bool indent=true)

  Writes one variant object to JSON string.

• Variant new_xml_element(const Name &name)

  Creates one variant that represents one XML element.

• Name get_xml_name(const Variant &xml_element)

  Gets the name of one XML element.

• void set_xml_name(Variant &xml_element, const Name &name)

  Sets the name of one XML element.

• const Variant & get_xml_attributes(const Variant &xml_element)

  Gets attributes of one XML element.

• Variant & get_xml_attributes(Variant &xml_element)

  Gets attributes of one XML element.

• const Variant & get_xml_content(const Variant &xml_element)

  Gets content of one XML element.

• Variant & get_xml_content(Variant &xml_element)

  Gets content of one XML element.

• const Variant & find_first_xml_child_element(const Variant &xml_element, const Name &name, usize start_index=0, usize *out_index=nullptr)

  Finds the first XML child element in the specified XML element with the specified name.

• R< Variant > read_xml(const void *src, usize src_size=USIZE_MAX)

  Parses one XML string.

• R< Variant > read_xml(IStream *stream)

  Parses one XML string.

• String write_xml(const Variant &v, bool indent=true)

  Writes one variant object to XML string.

• RV write_xml(IStream *stream, const Variant &v, bool indent=true)

  Writes one variant object to XML string.