List< PRIMITIVE, BUILDER > Class Template Reference

Builds a ListArray which generalizes ListOffsetArray. Instead of a single offsets array, ListArray has - starts which is the starting index of each list and stops which is the stopping index of each list. More...

#include <LayoutBuilder.h>

Public Member Functions
	List ()
	Creates a new List layout builder by allocating new starts and stops buffer, using default_options for initializing the buffer. More...
	List (const awkward::BuilderOptions &options)
	Creates a new List layout builder by allocating new starts and stops buffer, taking options from BuilderOptions for initializing the buffer. More...
BUILDER &	content () noexcept
	Returns the reference to the builder content. More...
BUILDER &	begin_list () noexcept
	Begins a list, appends the current length of the list contents in the starts buffer and returns the reference to the builder content. More...
void	end_list () noexcept
	Ends a list and appends the current length of the list contents in the stops buffer. More...
const std::string &	parameters () const noexcept
	Parameters for the builder form. More...
void	set_parameters (std::string parameter) noexcept
	Sets the form parameters. More...
void	set_id (size_t &id) noexcept
	Assigns a unique ID to each node. More...
void	clear () noexcept
	Discards the accumulated starts and stops, and clears the builder content. More...
size_t	length () const noexcept
	Current length of the content and starts buffer. More...
bool	is_valid (std::string &error) const noexcept
	Checks for validity and consistency. More...
void	buffer_nbytes (std::map< std::string, size_t > &names_nbytes) const noexcept
	Retrieves the names and sizes (in bytes) of the buffers used in the builder and its contents. More...
void	to_buffers (std::map< std::string, void * > &buffers) const noexcept
	Copies and concatenates all the accumulated data in each of the buffers of the builder and its contents to user-defined pointers. More...
void	to_char_buffers (std::map< std::string, uint8_t * > &buffers) const noexcept
	Copies and concatenates all the accumulated data in the builder to a map of user-allocated buffers. More...
std::string	form () const noexcept
	Generates a unique description of the builder and its contents in the form of a JSON-like string. More...

Detailed Description

template<typename PRIMITIVE, typename BUILDER>
class awkward::LayoutBuilder::List< PRIMITIVE, BUILDER >

Builds a ListArray which generalizes ListOffsetArray. Instead of a single offsets array, ListArray has - starts which is the starting index of each list and stops which is the stopping index of each list.

The starts and stops values can be 64-bit signed integers int64, 32-bit signed integers int32 or 32-bit unsigned integers uint32.

Template Parameters

PRIMITIVE	The type of starts and stops buffer.
BUILDER	The type of builder content.

Constructor & Destructor Documentation

List() [1/2]

List ( )

inline

Creates a new List layout builder by allocating new starts and stops buffer, using default_options for initializing the buffer.

List() [2/2]

List ( const awkward::BuilderOptions &  options )

inline

Creates a new List layout builder by allocating new starts and stops buffer, taking options from BuilderOptions for initializing the buffer.

Parameters

options

Initial size configuration of a buffer.

Member Function Documentation

begin_list()

BUILDER & begin_list ( )

inlinenoexcept

Begins a list, appends the current length of the list contents in the starts buffer and returns the reference to the builder content.

buffer_nbytes()

void buffer_nbytes ( std::map< std::string, size_t > &  names_nbytes ) const

inlinenoexcept

Retrieves the names and sizes (in bytes) of the buffers used in the builder and its contents.

clear()

void clear ( )

inlinenoexcept

Discards the accumulated starts and stops, and clears the builder content.

content()

BUILDER & content ( )

inlinenoexcept

Returns the reference to the builder content.

end_list()

void end_list ( )

inlinenoexcept

Ends a list and appends the current length of the list contents in the stops buffer.

form()

std::string form ( ) const

inlinenoexcept

Generates a unique description of the builder and its contents in the form of a JSON-like string.

is_valid()

bool is_valid ( std::string &  error ) const

inlinenoexcept

Checks for validity and consistency.

length()

size_t length ( ) const

inlinenoexcept

Current length of the content and starts buffer.

parameters()

const std::string & parameters ( ) const

inlinenoexcept

Parameters for the builder form.

set_id()

void set_id ( size_t &  id )

inlinenoexcept

Assigns a unique ID to each node.

set_parameters()

void set_parameters ( std::string  parameter )

inlinenoexcept

Sets the form parameters.

to_buffers()

void to_buffers ( std::map< std::string, void * > &  buffers ) const

inlinenoexcept

Copies and concatenates all the accumulated data in each of the buffers of the builder and its contents to user-defined pointers.

Used to fill the buffers map by allocating it with user-defined pointers using the same names and sizes (in bytes) obtained from buffer_nbytes.

to_char_buffers()

void to_char_buffers ( std::map< std::string, uint8_t * > &  buffers ) const

inlinenoexcept

Copies and concatenates all the accumulated data in the builder to a map of user-allocated buffers.

The map keys and the buffer sizes are obtained from buffer_nbytes

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The documentation for this class was generated from the following file:

• /home/runner/work/awkward/awkward/awkward-cpp/header-only/awkward/LayoutBuilder.h