boost::filesystem::path::replace_extension(const path& new_extension) produces inintuitive path on special directory

[Guillaume Labourey <guillaume.labourey@…>]

Hi, I have read the specification of boost::filesystem::path::replace_extension(const path& new_extension). It is very helpful in most of common use but the method may be ignore replacement when path represents the following cases:

• dot (.)
• dot-dot (..)
• root-name (C:, myserver,
  myserver)

The version available in boost 1.62.0 provide the following behaviour

Replace extension on root path: (arguable)
------------------------------------------

replace_extension("/","txt") = "/.txt"
replace_extension("C:\","txt") = "C:\.txt"

Replace extension on special file-name
--------------------------------------

replace_extension(".","txt") = "..txt"
replace_extension("..","txt") = "...txt"
replace_extension("/foo/.","txt") = "/foo/..txt"
replace_extension("/foo/..","txt") = "/foo/...txt"

Replace extension on root-name
------------------------------

replace_extension("C:","txt") = "C:.txt"
replace_extension("\\myserver","txt") = "\\myserver.txt"

Regards, Guillaume

[Guillaume Labourey <guillaume.labourey@…>]

Change component to good field.