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digitalmars.D.learn - Why does the example on page 8 of TDPL work without importing std.algorithm

reply Bryce Watkins <bwatkinsnz gmail.com> writes:
Hi all,

Can someone explain this to me please?

I have been trying to understand why you would use splitter over split 
between the examples on page 8 and page 12, as an errata has been 
posted: http://erdani.com/tdpl/errata/index.php?title=Main_Page which 
states that splitter should be used for better efficiency.

However when I use splitter in my code it works without having imported 
std.algorithm.

Thanks,
Bryce.
Jan 03 2011
parent reply Ellery Newcomer <ellery-newcomer utulsa.edu> writes:
If you're importing some other phobos module, I would guess an instance 
of this bug: http://d.puremagic.com/issues/show_bug.cgi?id=314

On 01/03/2011 10:56 AM, Bryce Watkins wrote:
 However when I use splitter in my code it works without having imported
 std.algorithm.

 Thanks,
 Bryce.

Jan 03 2011
parent reply "Lars T. Kyllingstad" <public kyllingen.NOSPAMnet> writes:
On Mon, 03 Jan 2011 17:18:34 -0600, Ellery Newcomer wrote:

 If you're importing some other phobos module, I would guess an instance
 of this bug: http://d.puremagic.com/issues/show_bug.cgi?id=314
 
 On 01/03/2011 10:56 AM, Bryce Watkins wrote:
 However when I use splitter in my code it works without having imported
 std.algorithm.


That's right. std.string does a public selective import of startsWith() and endsWith() from std.algorithm, and bug 314 causes the whole module to be imported publically. 314 is a huge, gaping hole in the module system. AFAIK, it's a high- priority bug, but also one that is very difficult to fix for some reason. -Lars
Jan 04 2011
parent Bryce Watkins <bwatkinsnz gmail.com> writes:
On 4/01/2011 9:26 p.m., Lars T. Kyllingstad wrote:
 On Mon, 03 Jan 2011 17:18:34 -0600, Ellery Newcomer wrote:

 If you're importing some other phobos module, I would guess an instance
 of this bug: http://d.puremagic.com/issues/show_bug.cgi?id=314

 On 01/03/2011 10:56 AM, Bryce Watkins wrote:
 However when I use splitter in my code it works without having imported
 std.algorithm.


That's right. std.string does a public selective import of startsWith() and endsWith() from std.algorithm, and bug 314 causes the whole module to be imported publically. 314 is a huge, gaping hole in the module system. AFAIK, it's a high- priority bug, but also one that is very difficult to fix for some reason. -Lars

Thanks now I understand, this also means that the example on page 8 only works because of bug 314, and should this bug ever be fixed then the example code will break. Therefore it really should include an import of std.algorithm explicitly for both clarity and long term reliability. Bryce.
Jan 04 2011