I am following along Kolja Dummann's Heavy Meta (4) livestream on Youtube.
I am trying to use the grammar cells to wrap a binary expression. the projection looks like this
<default> editor for concept BinaryExpression
node cell layout:
projection: [> wrap % left % grammar.constant wrap % right % <]
grammar: rule: <derive from projection> (instance of CellModel_RefNode) (instance of GrammarConstantQueryCell) (instance of CellModel_RefNode)
inspected cell layout:
<choose cell model>
the grammar.constant constant text property is set to subconcept.conceptAlias.
Unfortunately, I am getting an error message in the editor for both the wrap cells that says:
Error Missing Dependency on jetbrains.mps.lang.core
When I rebuild the editor, the language or the project, it reports that the rebuild is successful, however, I am unable to get the expected behavior of the aliases (+,-,*,/) being recognized after I type a number in the sandbox project.
I have added the jetbrains.mps.lang.core to the editor, but it shows up greyed out, i.e. unused.
when earlier in the tutorial I used wrap on my number literal editor, the expected behavior happened even though I got the editor showed this same error message. so perhaps the error message is a red herring.
I am using
- MPS 2020.2 (202.6397.948). (I had same issue in 2020.1)
- the grammarcells from de.itemis.mps.extensions-2020.1.1477.e4af43c (I think - not sure how to check).
You have to use JetBrains MPS 2021.2.1 - It works correctly.
I used grammar.wrap in 2032.3 - it didn't work correctly. You can build the language but changes are not applied to the model - there are still some troubles to use grammarcell language in the newest MPS version 2021.3.