[STDCXX-230] arithmetic extractors affect gcount()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1.2, 4.1.3
• Fix Version/s: 4.2.0
• Component/s: 27. Input/Output

Environment

all

• Assignee: Martin Sebor
• Reporter: Martin Sebor
• Created: 29/Jun/06 01:37
• Updated: 06/Feb/07 02:31
• Resolved: 06/Feb/07 02:31

Description

Moved from the Rogue Wave bug tracking database:

***Created By: pedretti @ Apr 18, 2001 03:51:32 PM***
basic_istream<>::gcount() is not ignoring characters consumed in formatted extraction operations.

[ example program: ]

#include <sstream>
#include <iostream>

using namespace std;

int main () {

stringstream ss;
string s;
int i;
char c;

ss << "12345 5678 hello world" << ends;
cout << "gcount() before extraction : " << ss.gcount() << endl;

ss >> i;
cout << "gcount() after formatted extraction of int: "
<< ss.gcount() << endl;

ss >> i;
cout << "gcount() after 2nd formatted extraction of int: "
<< ss.gcount() << endl;

ss >> s;
cout << "gcount() after formatted extraction of string: " << ss.gcount() << endl;

while (ss)

{ ss >> c; cout << "gcount() after formatted extraction of char: " << ss.gcount() << endl; }

}

[output:]

gcount() before extraction : 0
gcount() after formatted extraction of int: 0
gcount() after 2nd formatted extraction of int: 1
gcount() after formatted extraction of string: 1
gcount() after formatted extraction of char: 2
gcount() after formatted extraction of char: 1
gcount() after formatted extraction of char: 1
gcount() after formatted extraction of char: 1
gcount() after formatted extraction of char: 1
gcount() after formatted extraction of char: 1
gcount() after formatted extraction of char: 0

Issue Links

• is blocked by: STDCXX-329 std::istream::sentry ctor affects gcount()