cudf::ast::operation Class Reference

An operation expression holds an operator and zero or more operands. More...

#include <expressions.hpp>

Inheritance diagram for cudf::ast::operation:

Public Member Functions
	operation (ast_operator op, expression const &input)
	Construct a new unary operation object. More...
	operation (ast_operator op, expression const &left, expression const &right)
	Construct a new binary operation object. More...
	operation (ast_operator op, expression &&input)=delete
	operation (ast_operator op, expression &&left, expression &&right)=delete
	operation (ast_operator op, expression &&left, expression const &right)=delete
	operation (ast_operator op, expression const &left, expression &&right)=delete
ast_operator	get_operator () const
	Get the operator. More...
std::vector< std::reference_wrapper< expression const > >	get_operands () const
	Get the operands. More...
cudf::size_type	accept (detail::expression_parser &visitor) const override
	Accepts a visitor class. More...
std::reference_wrapper< expression const >	accept (detail::expression_transformer &visitor) const override
	Accepts a visitor class. More...
bool	may_evaluate_null (table_view const &left, table_view const &right, rmm::cuda_stream_view stream) const override
	Returns true if the expression may evaluate to null. More...
Public Member Functions inherited from cudf::ast::expression
bool	may_evaluate_null (table_view const &left, rmm::cuda_stream_view stream) const
	Returns true if the expression may evaluate to null. More...

Detailed Description

An operation expression holds an operator and zero or more operands.

Definition at line 438 of file expressions.hpp.

Constructor & Destructor Documentation

operation() [1/2]

cudf::ast::operation::operation	(	ast_operator	op,
		expression const &	input
	)

Construct a new unary operation object.

Parameters

op	Operator
input	Input expression (operand)

operation() [2/2]

cudf::ast::operation::operation	(	ast_operator	op,
		expression const &	left,
		expression const &	right
	)

Construct a new binary operation object.

Parameters

op	Operator
left	Left input expression (left operand)
right	Right input expression (right operand)

Member Function Documentation

accept() [1/2]

cudf::size_type cudf::ast::operation::accept ( detail::expression_parser &  visitor ) const

overridevirtual

Accepts a visitor class.

Parameters

visitor

The expression_parser parsing this expression tree

Returns

Index of device data reference for this instance

Implements cudf::ast::expression.

accept() [2/2]

std::reference_wrapper<expression const> cudf::ast::operation::accept ( detail::expression_transformer &  visitor ) const

overridevirtual

Accepts a visitor class.

Parameters

visitor

The expression_parser parsing this expression tree

Returns

Index of device data reference for this instance

Implements cudf::ast::expression.

get_operands()

std::vector<std::reference_wrapper<expression const> > cudf::ast::operation::get_operands ( ) const

inline

Get the operands.

Returns

Vector of operands

Definition at line 476 of file expressions.hpp.

get_operator()

ast_operator cudf::ast::operation::get_operator ( ) const

inline

Get the operator.

Returns

The operator

Definition at line 469 of file expressions.hpp.

may_evaluate_null()

bool cudf::ast::operation::may_evaluate_null ( table_view const &  left, table_view const &  right, rmm::cuda_stream_view  stream  ) const

inlineoverridevirtual

Returns true if the expression may evaluate to null.

Parameters

left	The left operand of the expression
right	The right operand of the expression
stream	CUDA stream used for device memory operations and kernel launches

Returns

true if the expression may evaluate to null, otherwise false

Implements cudf::ast::expression.

Definition at line 489 of file expressions.hpp.

---

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

• expressions.hpp