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Fix issue 15735: Correct splitter documentation when argument is an empty range.

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This commit is contained in:
Jon Degenhardt 2017-10-08 14:10:08 -07:00
parent 29a629eb26
commit c6ef7c3f5e
1 changed files with 5 additions and 3 deletions
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8
std/algorithm/iteration.d
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@ -3663,9 +3663,8 @@ empty elements.
The predicate is passed to $(REF binaryFun, std,functional), and can either accept The predicate is passed to $(REF binaryFun, std,functional), and can either accept
a string, or any callable that can be executed via $(D pred(element, s)). a string, or any callable that can be executed via $(D pred(element, s)).
If the empty range is given, the result is a range with one empty If the empty range is given, the result is an empty range. If a range with
element. If a range with one separator is given, the result is a range one separator is given, the result is a range with two empty elements.
with two empty elements.
If splitting a string on whitespace and token compression is desired, If splitting a string on whitespace and token compression is desired,
consider using $(D splitter) without specifying a separator (see fourth overload consider using $(D splitter) without specifying a separator (see fourth overload
@ -3852,6 +3851,7 @@ if (is(typeof(binaryFun!pred(r.front, s)) : bool)
@safe unittest @safe unittest
{ {
import std.algorithm.comparison : equal; import std.algorithm.comparison : equal;
import std.range : empty;
assert(equal(splitter("hello world", ' '), [ "hello", "", "world" ])); assert(equal(splitter("hello world", ' '), [ "hello", "", "world" ]));
int[] a = [ 1, 2, 0, 0, 3, 0, 4, 5, 0 ]; int[] a = [ 1, 2, 0, 0, 3, 0, 4, 5, 0 ];
@ -3863,6 +3863,8 @@ if (is(typeof(binaryFun!pred(r.front, s)) : bool)
assert(equal(splitter(a, 0), [ [], [1] ])); assert(equal(splitter(a, 0), [ [], [1] ]));
w = [ [0], [1], [2] ]; w = [ [0], [1], [2] ];
assert(equal(splitter!"a.front == b"(w, 1), [ [[0]], [[2]] ])); assert(equal(splitter!"a.front == b"(w, 1), [ [[0]], [[2]] ]));
assert(splitter("", '.').empty);
assert(equal(splitter(".", '.'), [ "", "" ]));
} }
@safe unittest @safe unittest