HRCore::Utils::Expression< T, U > Class Template Reference

A class to get and evaluate expression. More...

Public Member Functions
	Expression (U *helper=nullptr)
bool	eval ()
	Evaluate the expression. More...
T	getResult ()
	Get the Result object. Make sure eval() returned true first, otherwise Segment Fault! More...

Friends
std::istream &	operator>> (std::istream &is, Expression< T, U > &rhs)
	Convert a stream into an expression. More...
std::ostream &	operator<< (std::ostream &os, Expression< T, U > &rhs)
	Output the value of an expression. More...

Detailed Description

template<typename T, typename U>
class HRCore::Utils::Expression< T, U >

A class to get and evaluate expression.

Template Parameters

T	Data type, choose from 'Integer' and 'Float'
U	Storage implement type

Note

Invalid T will not be able to create a object

Definition at line 431 of file Utils.hpp.

Constructor & Destructor Documentation

Expression()

template<typename T , typename U >

HRCore::Utils::Expression< T, U >::Expression ( U *  helper = nullptr )

inline

Definition at line 471 of file Utils.hpp.

~Expression()

template<typename T , typename U >

HRCore::Utils::Expression< T, U >::~Expression ( )

inline

Definition at line 475 of file Utils.hpp.

Member Function Documentation

eval()

template<typename T , typename U >

bool HRCore::Utils::Expression< T, U >::eval ( )

inline

Evaluate the expression.

Returns

true

false

Definition at line 491 of file Utils.hpp.

getResult()

template<typename T , typename U >

T HRCore::Utils::Expression< T, U >::getResult ( )

inline

Get the Result object. Make sure eval() returned true first, otherwise Segment Fault!

Definition at line 525 of file Utils.hpp.

Friends And Related Function Documentation

operator<<

template<typename T , typename U >

std::ostream & operator<< ( std::ostream &  os, Expression< T, U > &  rhs  )

friend

Output the value of an expression.

Definition at line 618 of file Utils.hpp.

operator>>

template<typename T , typename U >

std::istream & operator>> ( std::istream &  is, Expression< T, U > &  rhs  )

friend

Convert a stream into an expression.

The function will reads std::istream object until EOF. If something invalid read, throw Exception::ExpressionConvertFailed.

Note

"--" "++"" is not allowed!

Definition at line 534 of file Utils.hpp.

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

• inc/Utils.hpp