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Merge pull request #1808 from adelq/devel

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Update tutorial to use RootObj
This commit is contained in:
Andreas Rumpf 2015-01-02 03:42:30 +01:00
commit 2fb969b638
1 changed files with 6 additions and 6 deletions
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12
doc/tut2.txt
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@ -56,7 +56,7 @@ Objects have access to their type at runtime. There is an
.. code-block:: nim .. code-block:: nim
type type
TPerson = object of TObject TPerson = object of RootObj
name*: string # the * means that `name` is accessible from other modules name*: string # the * means that `name` is accessible from other modules
age: int # no * means that the field is hidden from other modules age: int # no * means that the field is hidden from other modules
@ -76,10 +76,10 @@ never *equivalent*. New object types can only be defined within a type
section. section.
Inheritance is done with the ``object of`` syntax. Multiple inheritance is Inheritance is done with the ``object of`` syntax. Multiple inheritance is
currently not supported. If an object type has no suitable ancestor, ``TObject`` currently not supported. If an object type has no suitable ancestor, ``RootObj``
can be used as its ancestor, but this is only a convention. Objects that have can be used as its ancestor, but this is only a convention. Objects that have
no ancestor are implicitly ``final``. You can use the ``inheritable`` pragma no ancestor are implicitly ``final``. You can use the ``inheritable`` pragma
to introduce new object roots apart from ``system.TObject``. (This is used to introduce new object roots apart from ``system.RootObj``. (This is used
in the GTK wrapper for instance.) in the GTK wrapper for instance.)
@ -228,7 +228,7 @@ is needed:
.. code-block:: nim .. code-block:: nim
type type
TSocket* = object of TObject TSocket* = object of RootObj
FHost: int # cannot be accessed from the outside of the module FHost: int # cannot be accessed from the outside of the module
# the `F` prefix is a convention to avoid clashes since # the `F` prefix is a convention to avoid clashes since
# the accessors are named `host` # the accessors are named `host`
@ -284,7 +284,7 @@ Procedures always use static dispatch. For dynamic dispatch replace the
.. code-block:: nim .. code-block:: nim
type type
PExpr = ref object of TObject ## abstract base class for an expression PExpr = ref object of RootObj ## abstract base class for an expression
PLiteral = ref object of PExpr PLiteral = ref object of PExpr
x: int x: int
PPlusExpr = ref object of PExpr PPlusExpr = ref object of PExpr
@ -313,7 +313,7 @@ dispatching:
.. code-block:: nim .. code-block:: nim
type type
TThing = object of TObject TThing = object of RootObj
TUnit = object of TThing TUnit = object of TThing
x: int x: int