cuml::genetic::node Struct Reference

Represents a node in the syntax tree. More...

#include <node.h>

Collaboration diagram for cuml::genetic::node:

Public Types
enum class	type : uint32_t {   variable = 0 , constant , functions_begin , binary_begin = functions_begin ,   add = binary_begin , atan2 , div , fdim ,   max , min , mul , pow ,   sub , binary_end = sub , unary_begin , abs = unary_begin ,   acos , acosh , asin , asinh ,   atan , atanh , cbrt , cos ,   cosh , cube , exp , inv ,   log , neg , rcbrt , rsqrt ,   sin , sinh , sq , sqrt ,   tan , tanh , unary_end = tanh , functions_end = unary_end }
	All possible types of nodes. For simplicity, all the terminal and non-terminal types are clubbed together. More...

Public Member Functions
	node ()
	Default constructor for node. More...
	node (type ft)
	Construct a function node. More...
	node (int fid)
	Construct a variable node. More...
	node (float val)
	Construct a constant node. More...
	node (const node &src)
node &	operator= (const node &src)
	assignment operator More...
bool	is_terminal () const
bool	is_nonterminal () const
int	arity () const

Static Public Member Functions
static type	from_str (const std::string &ntype)
	Helper method to get node type from input string. More...

Public Attributes
type	t
union {
int   fid
float   val
}	u

Static Public Attributes
static const int	kInvalidFeatureId

Detailed Description

Represents a node in the syntax tree.

// A non-terminal (aka function) node
node func_node{node::type::sub};
// A constant node
float const_value = 2.f;
node const_node{const_value};
// A variable (aka feature) node
node var_node{20};

Member Enumeration Documentation

type

enum cuml::genetic::node::type : uint32_t

strong

All possible types of nodes. For simplicity, all the terminal and non-terminal types are clubbed together.

Enumerator
variable
constant
functions_begin
binary_begin
add
atan2
div
fdim
max
min
mul
pow
sub
binary_end
unary_begin
abs
acos
acosh
asin
asinh
atan
atanh
cbrt
cos
cosh
cube
exp
inv
log
neg
rcbrt
rsqrt
sin
sinh
sq
sqrt
tan
tanh
unary_end
functions_end

Constructor & Destructor Documentation

node() [1/5]

cuml::genetic::node::node ( )

explicit

Default constructor for node.

node() [2/5]

cuml::genetic::node::node ( type  ft )

explicit

Construct a function node.

Parameters

[in]

ft

function type

node() [3/5]

cuml::genetic::node::node ( int  fid )

explicit

Construct a variable node.

Parameters

[in]

fid

feature id that represents the variable

node() [4/5]

cuml::genetic::node::node ( float  val )

explicit

Construct a constant node.

Parameters

[in]

val

constant value

node() [5/5]

cuml::genetic::node::node ( const node &  src )

explicit

Parameters

[in]

src

source node to be copied

Member Function Documentation

arity()

int cuml::genetic::node::arity

(

)

const

Get the arity of the node. If it is a terminal, then a 0 is returned

from_str()

static type cuml::genetic::node::from_str ( const std::string &  ntype )

static

Helper method to get node type from input string.

Parameters

[in]

ntype

node type in string. Possible strings correlate one-to-one with the enum values for type

Returns

type

is_nonterminal()

bool cuml::genetic::node::is_nonterminal

(

)

const

whether the current node is a function

is_terminal()

bool cuml::genetic::node::is_terminal

(

)

const

whether the current is either a variable or a constant

operator=()

node& cuml::genetic::node::operator=

(

const node &

src

)

assignment operator

Parameters

[in]

src

source node to be copied

Returns

current node reference

Member Data Documentation

fid

int cuml::genetic::node::fid

if the node is variable type, then this is the column id to be used to fetch its value, from the input dataset

kInvalidFeatureId

const int cuml::genetic::node::kInvalidFeatureId

static

constant used to represent invalid feature id

t

type cuml::genetic::node::t

node type

union { ... } cuml::genetic::node::u

val

float cuml::genetic::node::val

if the node is constant type, then this is the value of the node

---

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

• include/cuml/genetic/node.h