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Diffstat (limited to 'doc/manual.rst')
| -rw-r--r-- | doc/manual.rst | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/doc/manual.rst b/doc/manual.rst index 3a0faed2e..bffb9e60c 100644 --- a/doc/manual.rst +++ b/doc/manual.rst @@ -1767,12 +1767,15 @@ further information. Nil --- -If a reference points to *nothing*, it has the value ``nil``. ``nil`` is also -the default value for all ``ref`` and ``ptr`` types. Dereferencing ``nil`` -is an unrecoverable fatal runtime error (and not a panic). -A dereferencing operation ``p[]`` implies that ``p`` is not nil. This can be -exploited by the implementation to optimize code like: +If a reference points to *nothing*, it has the value ``nil``. ``nil`` is the +default value for all ``ref`` and ``ptr`` types. The ``nil`` value can also be +used like any other literal value. For example, it can be used in an assignment +like ``myRef = nil``. +Dereferencing ``nil`` is an unrecoverable fatal runtime error (and not a panic). + +A successful dereferencing operation ``p[]`` implies that ``p`` is not nil. This +can be exploited by the implementation to optimize code like: .. code-block:: nim |