On 15 May 2013 08:50, Jonathan Wakely wrote:
> On 15 May 2013 06:57, ntysdd wrote:
>> Hi,
>>
>> I found this in the file `include\bits\basic_string.h':
>> /**
>> * @brief Read a line from stream into a string.
>> * @param __is Input stream.
>> * @param __str Buffer to store into.
>> * @return Reference to the input stream.
>> *
>> * Stores characters from is into @a __str until '\n' is
>> * found, the end of the stream is encountered, or str.max_size()
>> * is reached. If __is.width() is non-zero, that is the limit on
>> * the number of characters stored into @a __str. Any previous
>> * contents of @a __str are erased. If end of line was
>> * encountered, it is extracted but not stored into @a __str.
>> */
>> template<typename _CharT, typename _Traits, typename _Alloc>
>> inline basic_istream<_CharT, _Traits>&
>> getline(basic_istream<_CharT, _Traits>& __is,
>> basic_string<_CharT, _Traits, _Alloc>& __str)
>> { return getline(__is, __str, __is.widen('\n')); }
>>
>>
>> But in reality I found __is.width() seemed to be completely ignored.
>> For example:
>>
>> #include <iostream>
>> #include <string>
>> using namespace std;
>> int main(void)
>> {
>> string s;
>> cin.width(3);
>> getline(cin, s);
>> cout << s << endl;
>> return 0;
>> }
>>
>> Maybe the comment is wrong?
>
> Yes, it's wrong. I think the comment was copied from operator>> and
> not corrected. I'll fix it, thanks for reporting it.
* include/bits/basic_string.h (getline): Fix doxygen comments.
Committed to trunk so far.
commit 99b27b19b6a2f748c96fb1096f0d37925355213d
Author: Jonathan Wakely <[email protected]>
Date: Wed May 15 08:51:24 2013 +0100
* include/bits/basic_string.h (getline): Fix doxygen comments.
diff --git a/libstdc++-v3/include/bits/basic_string.h
b/libstdc++-v3/include/bits/basic_string.h
index aa188f5..23bd9b9 100644
--- a/libstdc++-v3/include/bits/basic_string.h
+++ b/libstdc++-v3/include/bits/basic_string.h
@@ -2767,10 +2767,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*
* Stores characters from @a __is into @a __str until @a __delim is
* found, the end of the stream is encountered, or str.max_size()
- * is reached. If is.width() is non-zero, that is the limit on the
- * number of characters stored into @a __str. Any previous
- * contents of @a __str are erased. If @a __delim was encountered,
- * it is extracted but not stored into @a __str.
+ * is reached. Any previous contents of @a __str are erased. If
+ * @a __delim is encountered, it is extracted but not stored into
+ * @a __str.
*/
template<typename _CharT, typename _Traits, typename _Alloc>
basic_istream<_CharT, _Traits>&
@@ -2785,10 +2784,9 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
*
* Stores characters from is into @a __str until '\n' is
* found, the end of the stream is encountered, or str.max_size()
- * is reached. If __is.width() is non-zero, that is the limit on
- * the number of characters stored into @a __str. Any previous
- * contents of @a __str are erased. If end of line was
- * encountered, it is extracted but not stored into @a __str.
+ * is reached. Any previous contents of @a __str are erased. If
+ * end of line is encountered, it is extracted but not stored into
+ * @a __str.
*/
template<typename _CharT, typename _Traits, typename _Alloc>
inline basic_istream<_CharT, _Traits>&
