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Re: Truncation [message #46983 is a reply to message #46981]

Sun, 09 October 2016 22:46

Klugier
Messages: 1099
Registered: September 2012
Location: Poland, Kraków

Senior Contributor

Hello,

As I understand truncate flag in C++ standard library - it loads files and clear it. For example this line:

file.open(filename, ios::out | ios::trunc); // If not exists create - if exists clear.
file.close(); // Here we have got always empty file - even if file is not empty!

In the Upp framework you will achieve exactly the same with SaveFile(filePat, data) function. It will clear old file and put new content. So, equivalent to the upper code is:

SaveFile("text.txt", "");

Sincerely,
Klugier

U++ - one framework to rule them all.

[Updated on: Sun, 09 October 2016 22:47]

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