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fixes #2420; negative indexing for slicing is obsolete (breaking change!)

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Araq
2015-03-28 00:15:04 +01:00
parent 46fb0e0bac
commit 2b80d75aa2
8 changed files with 82 additions and 79 deletions
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5
web/news.txt
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@@ -59,11 +59,12 @@ News
echo x.T
inc x
- **Negative indexing for slicing is deprecated and will be removed in the
next version of the language.** Instead of ``a[0.. -1]`` you can
- **Negative indexing for slicing does not work anymore!** Instead
of ``a[0.. -1]`` you can
use ``a[0.. ^1]``. This also works with accessing a single
element ``a[^1]``. Note that we cannot detect this reliably as it is
determined at **runtime** whether negative indexing is used!
``a[0.. -1]`` now produces the empty string/sequence.
- The compiler now warns about code like ``foo +=1`` which uses inconsistent
spacing around binary operators. Later versions of the language will parse
these as unary operators instead so that ``echo $foo`` finally can do what