From type/IO/Spec/Cygwin

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method canonpath(Str() $path, :$parent --> Str:D)

Returns a string that is a canonical representation of $path. If :$parent is set to true, will also clean up references to parent directories. NOTE: the routine does not access the filesystem.

IO::Spec::Cygwin.canonpath(｢C:\foo\\..\bar\..\ber｣).say;
# OUTPUT: «C:/foo/../bar/../ber␤» 
 
IO::Spec::Cygwin.canonpath("foo///./../bar/../ber").say;
# OUTPUT: «foo/../bar/../ber␤» 
 
IO::Spec::Cygwin.canonpath("foo///./../bar/../ber", :parent).say;
# OUTPUT: «ber␤»

From type/IO/Spec/Win32

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method canonpath(Str() $path, :$parent --> Str:D)

Returns a string that is a canonical representation of $path. If :$parent is set to true, will also clean up references to parent directories. NOTE: the routine does not access the filesystem.

IO::Spec::Win32.canonpath("C:/foo//../bar/../ber").say;
# OUTPUT: «C:\foo\..\bar\..\ber␤» 
 
IO::Spec::Win32.canonpath("C:/foo///./../bar/../ber").say;
# OUTPUT: «C:\foo\..\bar\..\ber␤» 
 
IO::Spec::Win32.canonpath("C:/foo///./../bar/../ber", :parent).say;
# OUTPUT: «C:\ber␤»

From type/IO/Spec/QNX

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method canonpath(Str() $path, :$parent --> Str:D)

Returns a string that is a canonical representation of $path. If :$parent is set to true, will also clean up references to parent directories. NOTE: the routine does not access the filesystem, so no symlinks are followed.

IO::Spec::QNX.canonpath("foo//../bar/../ber").say;
# OUTPUT: «foo/../bar/../ber␤» 
 
IO::Spec::QNX.canonpath("foo///./../bar/../ber").say;
# OUTPUT: «foo/../bar/../ber␤» 
 
IO::Spec::QNX.canonpath("foo///./../bar/../ber", :parent).say;
# OUTPUT: «ber␤»

From type/IO/Spec/Unix

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method canonpath(Str() $path, :$parent --> Str:D)

Returns a string that is a canonical representation of $path. If :$parent is set to true, will also clean up references to parent directories. NOTE: the routine does not access the filesystem, so no symlinks are followed.

IO::Spec::Unix.canonpath("foo//../bar/../ber").say;
# OUTPUT: «foo/../bar/../ber␤» 
 
IO::Spec::Unix.canonpath("foo///./../bar/../ber").say;
# OUTPUT: «foo/../bar/../ber␤» 
 
IO::Spec::Unix.canonpath("foo///./../bar/../ber", :parent).say;
# OUTPUT: «ber␤»