Hello
Is it possible to use map<string&, string&>?
Why I need it. I have a large amount of data obtained from XML file.
I should do processing of this data.
The processing takes many stages, and could be done using std::map
templates. But new instance of std::map is required on each stage.
I would like to avoid additional memory allocation which is done in
map<string, stringcase.
I would like to use smth like map<string&, string&- in this case
there is no need to write additional binary operator
to be used as predicate for map (which would be required if I use
map<string*, string*>)
The questions are:
1. is it possible
2. are any underground problems if I use it
Would like to hear guru comments on it...
Tx,
Alexandru
3  2368 
no, we cannot use map<string&, string&>.
use map<string*, string*instead.
<as*******@gmail.com>
??????:11**********************@y5g2000hsa.googleg roups.com...
Hello
Is it possible to use map<string&, string&>?
Why I need it. I have a large amount of data obtained from XML file.
I should do processing of this data.
The processing takes many stages, and could be done using std::map
templates. But new instance of std::map is required on each stage.
I would like to avoid additional memory allocation which is done in
map<string, stringcase.
I would like to use smth like map<string&, string&- in this case
there is no need to write additional binary operator
to be used as predicate for map (which would be required if I use
map<string*, string*>)
The questions are:
1. is it possible
2. are any underground problems if I use it
Would like to hear guru comments on it...
Tx,
Alexandru
as*******@gmail.com wrote:
Is it possible to use map<string&, string&>?
No. References are not objects. Consider pointers.
V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask as*******@gmail.com wrote:
>
Is it possible to use map<string&, string&>?
Not directly, but if you've got a library that supports TR1 (or boost,
in a different namespace) you can use
std::tr1::reference_wrapper<stringin both of those places.
--
-- Pete
Roundhouse Consulting, Ltd. ( www.versatilecoding.com)
Author of "The Standard C++ Library Extensions: a Tutorial and
Reference." ( www.petebecker.com/tr1book) This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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