tkobayas opened a new issue, #2025:
URL: https://github.com/apache/incubator-kie-issues/issues/2025
Note: This is an experimental PoC. Not yet to be ready for
discussion/proposal for dev ML.
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DRLX is another representation of drools rule language. Characteristics are
* Based on MVEL3
* MVEL3 is an enhanced Java
* MVEL3 basically follows MVEL2 syntax. We may add/drop some syntax
* MVEL3 can be transpiled to Java so we can pre-compile MVEL3
expressions (just like executable-model)
* DRLX adds rule-related syntax to MVEL3
* LSP can be developed with code-completion using `antlr4-c3`
[link to spec docs]
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Implementation topics:
* Grammars are written in Antlr
* MVEL3 grammar imports Java grammar
* DRLX grammar imports MVEL3 grammar
* Once MVEL3/DRLX antlr AST is created, a Visitor can create JavaParser AST
by visiting the antlr AST.
* JavaParser AST is useful because
* We already have the transpiler logic
* JavaParser SymbolResolver can resolve a node to a type
* SymbolResolver would be useful in LSP code-completion
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PoC doesn't have to implement full features. Probably to demonstrate some
use cases
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