ndn::Result< T > Struct Template Reference

Result type template. More...

#include <ndn/common.hpp>

Public Member Functions
bool	ok () const
	Check if the operation succeeded.
	operator bool () const
	Implicit conversion to bool.

Public Attributes
T	value
	Result value.
Error	error
	Error code.

Detailed Description

template<typename T>
struct ndn::Result< T >

Result type template.

A type for returning both a value and an error code without using exceptions.

Template Parameters

T	Type of the value returned on success

Result<int> divide(int a, int b) {
    if (b == 0) return {0, Error::InvalidParam};
    return {a / b, Error::Success};
}
 
auto result = divide(10, 2);
if (result.ok()) {
    printf("Result: %d\n", result.value);
}

Definition at line 147 of file common.hpp.

Member Function Documentation

ok()

template<typename T >

bool ndn::Result< T >::ok ( ) const

inline

Check if the operation succeeded.

Returns

true if successful

Definition at line 155 of file common.hpp.

References ndn::Result< T >::error.

Referenced by ndn::Result< T >::operator bool().

operator bool()

template<typename T >

ndn::Result< T >::operator bool ( ) const

inlineexplicit

Implicit conversion to bool.

Returns

true if successful

Definition at line 161 of file common.hpp.

References ndn::Result< T >::ok().

Member Data Documentation

error

template<typename T >

Error ndn::Result< T >::error

Error code.

Definition at line 149 of file common.hpp.

Referenced by ndn::Result< T >::ok().

value

template<typename T >

T ndn::Result< T >::value

Result value.

Definition at line 148 of file common.hpp.

Referenced by ndn::Link::fromData(), ndn::TlvDecoder::readNonNegativeInteger(), and ndn::TlvDecoder::readVarNumber().

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

• include/ndn/common.hpp