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deprecated string case statements without 'else'

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Araq 2014-10-02 10:08:41 +02:00
commit c99ec16544
4 changed files with 15 additions and 8 deletions
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10
doc/manual/stmts.txt
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@ -262,13 +262,11 @@ given *slicelist* the ``else`` part is executed. If there is no ``else``
part and not all possible values that ``expr`` can hold occur in a
``slicelist``, a static error occurs. This holds only for expressions of
ordinal types. "All possible values" of ``expr`` are determined by ``expr``'s
type.
type. To suppress the static error an ``else`` part with an
empty ``discard`` statement should be used.
If the expression is not of an ordinal type, and no ``else`` part is
given, control passes after the ``case`` statement.
To suppress the static error in the ordinal case an ``else`` part with an
empty ``discard`` statement can be used.
For non ordinal types it is not possible to list every possible value and so
these always require an ``else`` part.
As a special semantic extension, an expression in an ``of`` branch of a case
statement may evaluate to a set or array constructor; the set or array is then