Another bug in boost.lexical_cast 1.30
lexical_cast.hpp line 145: bool operator<<(const Source &input) { return stream << input; } Convert basic_stringstream & to bool? -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³Ðŵ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë׌°ÓßÂÛµÄÓ°ÏìÏ࿹ºâ¡£ /*******************/
From: "Black Ice" <yg-boost-users@m.gmane.org>
lexical_cast.hpp line 145: bool operator<<(const Source &input) { return stream << input; } Convert basic_stringstream & to bool?
Yes. :) basic_stringstream has a user-defined conversion to void *, which then converts to bool, giving the stream state. It has been suggested on the Boost list to change this to a more explicit test, though (also to remove a warning for this conversion), such as: bool operator<<(const Source &input) { return !(stream << input).fail(); } Regards, Terje
Thanks -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³Ðŵ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë׌°ÓßÂÛµÄÓ°ÏìÏ࿹ºâ¡£ /*******************/ "Terje Sletteb?" <tslettebo@chello.no> wrote in message news:03e401c2f598$0fe168e0$8d6c6f50@pc...
From: "Black Ice" <yg-boost-users@m.gmane.org>
lexical_cast.hpp line 145: bool operator<<(const Source &input) { return stream << input; } Convert basic_stringstream & to bool?
Yes. :)
basic_stringstream has a user-defined conversion to void *, which then converts to bool, giving the stream state. It has been suggested on the Boost list to change this to a more explicit test, though (also to remove a warning for this conversion), such as:
bool operator<<(const Source &input) { return !(stream << input).fail(); }
Regards,
Terje
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