ExpressionCos Class Reference

Detailed Description

Symbolic expression representing cosine function.

#include <drake/common/symbolic/expression/expression_cell.h>

Public Member Functions
	ExpressionCos (const Expression &e)
	~ExpressionCos () override
Expression	Expand () const override
	Expands out products and positive integer powers in expression.
Expression	EvaluatePartial (const Environment &env) const override
	Returns an Expression obtained by replacing all occurrences of the variables in env in the current expression cell with the corresponding values in env.
Expression	Substitute (const Substitution &s) const override
	Returns an Expression obtained by replacing all occurrences of the variables in s in the current expression cell with the corresponding expressions in s.
Expression	Differentiate (const Variable &x) const override
	Differentiates this symbolic expression with respect to the variable var.
std::ostream &	Display (std::ostream &os) const override
	Outputs string representation of expression into output stream os.
Public Member Functions inherited from UnaryExpressionCell
	~UnaryExpressionCell () override
void	HashAppendDetail (DelegatingHasher *) const override
	Sends all hash-relevant bytes for this ExpressionCell type into the given hasher, per the hash_append generic hashing concept – except for get_kind(), because Expression already sends that.
Variables	GetVariables () const override
	Collects variables in expression.
bool	EqualTo (const ExpressionCell &e) const override
	Checks structural equality.
bool	Less (const ExpressionCell &e) const override
	Provides lexicographical ordering between expressions.
double	Evaluate (const Environment &env) const override
	Evaluates under a given environment (by default, an empty environment).
const Expression &	get_argument () const
	Returns the argument.
Public Member Functions inherited from ExpressionCell
virtual	~ExpressionCell ()
std::atomic< int > &	use_count () const
	Returns the intrusive use count (ala boost::intrusive_ptr).
ExpressionKind	get_kind () const
	Returns expression kind.
bool	is_polynomial () const
	Checks if this symbolic expression is convertible to Polynomial.
bool	is_expanded () const
	Checks if this symbolic expression is already expanded.
void	set_expanded ()
	Sets this symbolic expression as already expanded.
	ExpressionCell (const ExpressionCell &)=delete
ExpressionCell &	operator= (const ExpressionCell &)=delete
	ExpressionCell (ExpressionCell &&)=delete
ExpressionCell &	operator= (ExpressionCell &&)=delete

Additional Inherited Members
Protected Member Functions inherited from UnaryExpressionCell
	UnaryExpressionCell (ExpressionKind k, Expression e, bool is_poly, bool is_expanded)
	Constructs UnaryExpressionCell of kind k with e, is_poly, and is_expanded.
Protected Member Functions inherited from ExpressionCell
	ExpressionCell (ExpressionKind k, bool is_poly, bool is_expanded)
	Constructs ExpressionCell of kind k with is_poly and is_expanded, with a use_count of zero.

Constructor & Destructor Documentation

ExpressionCos()

ExpressionCos ( const Expression & e )

explicit

~ExpressionCos()

~ExpressionCos ( )

override

Member Function Documentation

Differentiate()

Expression Differentiate ( const Variable & x ) const

nodiscardoverridevirtual

Differentiates this symbolic expression with respect to the variable var.

Exceptions

std::exception

if it is not differentiable.

Implements ExpressionCell.

Display()

std::ostream & Display ( std::ostream & os ) const

overridevirtual

Outputs string representation of expression into output stream os.

Implements ExpressionCell.

EvaluatePartial()

Expression EvaluatePartial ( const Environment & env ) const

nodiscardoverridevirtual

Returns an Expression obtained by replacing all occurrences of the variables in env in the current expression cell with the corresponding values in env.

Exceptions

std::exception

if NaN is detected during substitution.

Implements ExpressionCell.

Expand()

Expression Expand ( ) const

nodiscardoverridevirtual

Expands out products and positive integer powers in expression.

Exceptions

std::exception

if NaN is detected during expansion.

Implements ExpressionCell.

Substitute()

Expression Substitute ( const Substitution & s ) const

nodiscardoverridevirtual

Returns an Expression obtained by replacing all occurrences of the variables in s in the current expression cell with the corresponding expressions in s.

Exceptions

std::exception

if NaN is detected during substitution.

Implements ExpressionCell.

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

• drake/common/symbolic/expression/expression_cell.h