Mercurial: Can I mix slashes and backslashes in paths?

Are the following pat开发者_StackOverflowhs valid? Could they cause malfunction of Mercurial?

mercurial.ini file:

[ui]
ignore = ~\file/hgignore.ini

mercurial.ini file:

[ui]
ignore = .\file/hgignore.ini

hgrc file:

[paths]
default = D:\MySolution/MyProject

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It shouldn't be an issue in hgrc.

It can be an issue in hgsub, for path to subrepos.