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CodeGen 5.1 Released

By Steve Ives, Posted on December 4, 2015 at 4:07 pm

Steve Ives

Just a quick note to announce that we have today released CodeGen 5.1. This release has but one new feature, but it does allow me to solve a challenging problem that I faced while working on a customer project recently. I have dubbed this new feature conditional processing blocks. Essentially it is the ability to conditionally include (or exclude) parts of a template file based on the presence or absence of identifiers that can be declared on the command line. It allows you to achieve the same kind of results that you would when using .DEFINE, .IFDEF and .IFNDEF in DBL source code, but within template files. For example a developer could include code like this in a template file:

    open(channel=0,u:i,”<FILE_NAME>”)
    <IF DEFINED_ATTACH_IO_HOOKS>
    new <StructureName>Hooks(channel)
    </IF>

The developer would then have the ability to choose whether to include or exclude the code that assigns the I/O hooks object to the channel that was opened at the time that they generate the code. By default the I/O hooks code would not be included; if it was needed the developer would define the ATTACH_IO_HOOKS identifier as they generate the code. They would do this by using a new –define command line option:

    codegen –s EMPLOYEE –t FILE_IO_CLASS –r –define ATTACH_IO_HOOKS

This may seem like a very simple change, and it is, but my mind is now racing thinking about all of the new possibilities it opens up.


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