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Diffstat (limited to 'doc/manual/exceptions.txt')
| -rw-r--r-- | doc/manual/exceptions.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/doc/manual/exceptions.txt b/doc/manual/exceptions.txt index 311a810ff..e40742e0a 100644 --- a/doc/manual/exceptions.txt +++ b/doc/manual/exceptions.txt @@ -47,6 +47,27 @@ the rest of the procedure - that is not within a ``finally`` clause - is not executed (if an exception occurs). +Try expression +-------------- + +Try can also be used as an expression; the type of the ``try`` branch then +needs to fit the types of ``except`` branches, but the type of the ``finally`` +branch always has to be ``void``: + +.. code-block:: nim + let x = try: parseInt("133a") + except: -1 + finally: echo "hi" + + +To prevent confusing code there is a parsing limitation; if the ``try`` +follows a ``(`` it has to be written as a one liner: + +.. code-block:: nim + let x = (try: parseInt("133a") except: -1) + + + Defer statement --------------- |