🏰 🐅 👨🏻‍🎨 Introducing MPS 2020.3 👎 🍟 ⏬

For several months we have been working on making MPS even more user-friendly and fixing the problems you reported to us. You can download the new MPS 2020.3 on our website or using the Toolbox application .

New generator macro

$CALL-SITE$. , SWITCH/CALL, . SWITCH/CALL . , template/switch «call site node», , template/switch , .

reduce_Comment, « » reduce_MethodDeclaration:

, , call site node $CALL-SITE$ :

reduce_Expressions, ( ) ( , ). $CALL-SITE$ - , call site node:

The template and radio button declarations have a flag that is specifically toggled to indicate that the call site node should be used. It would be an error to use the $ CALL-SITE $ macro inside a template / switch that does not indicate the need to get $ CALL-SITE $. It is not necessary to provide an explicit CALL / SWITCH argument — the MPS generator can determine if the template / switch being called needs a call site, and evaluates the template, including macros, CALL / SWITCH before processing.

This functionality is useful in scenarios such as conditional casting, such as in expressions <strong>IF</strong> needCast (<strong>Type</strong>), ELSE

, or in transformations, when there are several sources of expression that can serve as input data, for example

switch { <strong>case</strong> <strong>Double</strong> : <strong>Double</strong>.valueOf(expression); <strong>case</strong> <strong>Integer</strong> : <strong>Integer</strong>.valueOf(expression, 16); …}