[STDCXX-146] std::stringbuf(const string&) inefficient

• Type: Sub-task
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1.2, 4.1.3
• Fix Version/s: 4.1.4
• Component/s: 27. Input/Output

Environment

all

• Assignee: Martin Sebor
• Reporter: Martin Sebor
• Created: 17/Feb/06 06:19
• Updated: 26/Feb/06 06:26
• Resolved: 26/Feb/06 06:26

Description

The basic_stringbuf(const basic_string&) ctor is an inefficient interface when constructing a stringbuf object from a character array (as opposed to an already existing string object). Each invocation of the ctor causes a temporary string object to be allocated for the formal function argument only to have it deallocated as soon as the stringbuf ctor returns.

A basic_stringbuf(const char_type*) ctor overload would be a much more efficient interface.

The same goes for the str(const basic_string&) member function of basic_stringbuf as well as for all the stringstream class templates.