/usr/include/mongo/base/status_with.h is in libmongoclient-dev 1.1.2-6ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | // status_with.h
/* Copyright 2013 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include "mongo/base/status.h"
namespace mongo {
/*
* StatusWith is used to return an error or a value
* this is designed to make exception code free cleaner by not needing as many out paramters
* example:
StatusWith<int> fib( int n ) {
if ( n < 0 ) return StatusWith<int>( ErrorCodes::BadValue, "paramter to fib has to be >= 0" );
if ( n <= 1 ) return StatusWith<int>( 1 );
StatusWith<int> a = fib( n - 1 );
StatusWith<int> b = fib( n - 2 );
if ( !a.isOK() ) return a;
if ( !b.isOK() ) return b;
return StatusWith<int>( a.getValue() + b.getValue() );
}
* Note: the value is copied in the current implementation, so should be small (int, int*)
* not a vector
*/
template <typename T>
class StatusWith {
public:
/**
* for the error case
*/
StatusWith(ErrorCodes::Error code, const std::string& reason, int location = 0)
: _status(Status(code, reason, location)) {}
/**
* for the error case
*/
explicit StatusWith(const Status& status) : _status(status) {
// verify(( !status.isOK() ); // TODO
}
/**
* for the OK case
*/
explicit StatusWith(const T& t) : _status(Status::OK()), _t(t) {}
const T& getValue() const { /* verify( isOK() ); */
return _t;
} // TODO
const Status& getStatus() const {
return _status;
}
bool isOK() const {
return _status.isOK();
}
std::string toString() const {
return _status.toString();
}
private:
Status _status;
T _t;
};
}
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