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Learn Red ? Fundamentals of Red
book

Learn Red ? Fundamentals of Red

by Ivo Balbaert
May 2018
Beginner content levelBeginner
252 pages
6h 19m
English
Packt Publishing
Content preview from Learn Red ? Fundamentals of Red

Macros

Another feature many modern programming languages have is macros. Macros are about transforming code at runtime. By now, you should be convinced that Red is already well equipped to do that with minimal effort; think about all you can do with do, reduce, and load. After all, code is data and data is code!  Because Red is first of all a compiled language, macros in Red are more oriented towards transforming code at compile time, but they work  equally well when interpreted. Here is an example of a macro to give you a taste:

;-- see Chapter10/macros.red:#macro as-KB: func [n][n * 1024]print as-KB 64 ;== 65536   

When the macro is expanded by the preprocessor, the code will result in print 65536. This example is a named macro, and it ...

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Publisher Resources

ISBN: 9781789130706Supplemental Content