[Issue 5464] Attribute to not ignore function result

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5464



--- Comment #1 from bearophile_hugs at eml.cc 2011-02-28 04:19:31 PST ---
In Phobos there are several functions that have no important effects (despite
sometimes not being pure) that are useful just for their return value, like
isSorted, front, setDifference, etc. @nodiscard is useful for them all.

See also bug 3882

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