- delay construction of message buffer
- OStringStream count() method to test if anything has been streamed
STYLE: explicit use of std::ios_base in IOstreams
- document the return information of set flag methods
- soft renames (ie, old names still available via typedefs) for more
reasonable names and more coverage with std stream variants.
The old names could be a bit cryptic.
For example, uiliststream (== an unallocated/external list storage),
which is written as std::ispanstream for C++23.
Could similarly argue that IListStream is better named as
ICharStream, since it is an input stream of characters and the
internal storage mechanism (List or something else) is mostly
irrelevant.
Extending the coverage to include all std stream variants, and
simply rewrap them for OpenFOAM IOstream types. This simplifies the
inheritance patterns and allows reuse of icharstream/ocharstream as
a drop-in replace for istringstream/ostringstream in other wrappers.
Classes:
* icharstream / ICharStream [old: none / IListStream]
* ocharstream / OCharStream [old: none / OListStream]
* ispanstream / ISpanStream [old: uiliststream / UIListStream]
* ospanstream / OSpanStream [old: none / UOListStream]
Possible new uses : read file contents into a buffer, broadcast
buffer contents to other ranks and then transfer into an icharstream
to be read from. This avoid the multiple intermediate copies that
would be associated when using an istringstream.
- Use size doubling instead of block-wise incremental for ocharstream
(OCharStream). This corresponds to the sizing behaviour as per
std::stringstream (according to gcc-11 includes)
STYLE: drop Foam_IOstream_extras constructors for memory streams
- transitional/legacy constructors but not used in any code
- stem(), replace_name(), replace_ext(), remove_ext() etc
- string::contains() method - similar to C++23 method
Eg,
if (keyword.contains('/')) ...
vs
if (keyword.find('/') != std::string::npos) ...
- uses ocountstream for the output, which swallows all output.
Improves portability
ENH: improved efficiency in countstreambuf
- xsputn() instead of overflow
- more consistent seek* methods
- simplify structure.
- protect against nullptr when resetting memory streams
- make UIListStream swappable
- add uiliststream as an example of using a plain std::istream
- more consistent naming:
* Versions that hold and manage their own memory:
IListStream, OListStream
* Versions that reference a fixed size external memory:
UIListStream, UOListStream
- use List storage instead of DynamicList within OListStream.
Avoids duplicate bookkeeping, more direct handling of resizing.
