{"id":182872,"date":"2024-07-22T07:40:56","date_gmt":"2024-07-22T07:40:56","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/knowledge\/?post_type=topic&p=182872"},"modified":"2024-07-22T12:25:47","modified_gmt":"2024-07-22T12:25:47","slug":"scade-one-variant-types","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/scade-one-variant-types\/","title":{"rendered":"Scade One Variant Types"},"content":{"rendered":"

Introduction<\/h3>\n

This blog entry is special: we have a video for you!<\/p>\n

Aubanel, our director of Ansys Customer Excellence, demonstrates a new construct in Swan, the modeling language used in Scade One, called variant types.<\/p>\n

Variant types?<\/h3>\n

A variant type defines a data structure holding a value that can take on several different, but fixed, types. The generated C code uses union in a safe, MISRA-compatible way, by using a tag field to know which type is in use.<\/a><\/p>\n

In short, a variant type is a type that can be this or that or something else<\/em>.<\/p>\n

In the video, Aubanel showcases this with a shape<\/code> type that can be either<\/em> a rectangle, a circle or a polygon.<\/p>\n

This makes it easy to design generic operators that perform calculations on shapes, with no need to duplicate our logic to handle various cases for various shape types:<\/p>\n

\n
\n <\/em>\n<\/p>\n

Demo time \ud83c\udfac<\/h3>\n