http://d.puremagic.com/issues/show_bug.cgi?id=5977
Summary: String splitting with empty separator Product: D Version: D2 Platform: x86 OS/Version: Windows Status: NEW Keywords: patch Severity: normal Priority: P2 Component: Phobos AssignedTo: nob...@puremagic.com ReportedBy: bearophile_h...@eml.cc --- Comment #0 from bearophile_h...@eml.cc 2011-05-10 16:30:55 PDT --- This D2 program seems to go in infinte loop (dmd 2.053beta): import std.string; void main() { split("a test", ""); } ------------------------ My suggestion is to add code like this in std.array.split(): if (delim.length == 0) return split(s); This means that en empty splitting string is like splitting on generic whitespace. This is useful in code like: auto foo(string txt, string delim="") { return txt.split(delim); } This means that calling foo with no arguments splits txt on whitespace, otherwise splits on the given string. This allows to use the two forms of split in foo() without if conditions. This is done in Python too, where None is used instead of an empty string. The modified split is something like (there is a isSomeString!S2 because are special, they aren't generic arrays, splitting on whitespace is meaningful for strings only): Unqual!(S1)[] split(S1, S2)(S1 s, S2 delim) if (isForwardRange!(Unqual!S1) && isForwardRange!S2) { Unqual!S1 us = s; if (isSomeString!S2 && delim.length == 0) { return split(s); } else { auto app = appender!(Unqual!(S1)[])(); foreach (word; std.algorithm.splitter(us, delim)) { app.put(word); } return app.data; } } Beside this change, I presume std.algorithm.splitter() too needs to test for an empty delim. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------