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https://issues.apache.org/jira/browse/STDCXX-640?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12585249#action_12585249
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Farid Zaripov commented on STDCXX-640:
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Martin, are you sure that 10e-1 should be parsed into 1 instead of 10?
I've tested on MSVC with native STL and STLport and both returned 10 instead of
1.
>From the standard (22.2.2.1.2 p3):
{noformat}
Stage 3: The result of stage 2 processing can be one of
— A sequence of chars has been accumulated in stage 2 that is converted
(according to the rules of scanf)
to a value of the type of val . This value is stored in val and
ios_base::goodbit is stored in err .
{noformat}
The following code assigns lvar to 10 on MSVC:
{noformat}
long lvar;
scanf ("10e-1", "%ld", &lvar);
{noformat}
> std::num_get::do_get() parses no more than 128 characters
> ---------------------------------------------------------
>
> Key: STDCXX-640
> URL: https://issues.apache.org/jira/browse/STDCXX-640
> Project: C++ Standard Library
> Issue Type: Bug
> Components: 22. Localization
> Affects Versions: 4.1.2, 4.1.3, 4.1.4, 4.2.0
> Environment: All
> Reporter: Farid Zaripov
> Assignee: Farid Zaripov
> Priority: Minor
> Fix For: 4.2.1
>
>
> The following program fails on assert.
> {noformat}
> #include <cassert>
> #include <sstream>
> #include <string>
> int main ()
> {
> typedef std::num_get<char> NumGet;
> typedef std::istreambuf_iterator<char> Iter;
> std::locale loc;
> for (unsigned i = 0; i < 10000; ++i) {
> std::string s (i, '0');
> s.push_back ('1');
> std::istringstream is (s);
> std::ios::iostate state = std::ios::goodbit;
> long val = 0;
> std::use_facet<NumGet> (loc).get (Iter (is), Iter (), is, state, val);
> assert (1 == val && std::ios::eofbit == state);
> }
> return 0;
> }
> {noformat}
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