The repeat keyword is used to repeat the filtering on the data just inserted. This is particularly useful with the asterisk name or on nodes that do not otherwise include a format that transforms the tags included in themselves.
This let you create nodes that are like macros.
Note that the macro can itself include a repeat in one of its Insert Node tags.1
This module can be used to create macros (as pointed out by one of our user in a Drupal issue.)
The following steps show you how you can create a macro with the Insert Node module.
First, create a node that is to become the macro. We will call this node macro. It is used without the Insert Node filter so the Insert Node tags do not get changed. This is important since we reference the main node (with the asterisk) and that reference would look like a recursive reference.
One idea is to use the macro as a PayPal button which gets set with parameters from another node. ...
This is a subject that comes back all the time in C/C++ boards.
Should you use assertions?
The answer is clearly yes. But the C/C++ assert() function is usually defined using a macro. Macros have several problems. The most common ones are: they offer no type checking, they do not warn you about weird side effects, they have a different syntax than the C/C++ language itself.
One good thing: for a fast program, the debug code used to check parameters, results, etc. is gone.
One really bad thing: if the expression in the macro has a side effect, the release program is different from ...