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Showing content from https://github.com/pmd/pmd/issues/4845 below:

[apex] Use same ANLTR version for apex-parser · Issue #4845 · pmd/pmd · GitHub

Is your feature request related to a problem? Please describe.
PMD uses a different ANTLR version than apex-parser:

PMD uses ANTLR 4.9
apex-parser uses ANTLR 4.8

We have already a workaround to just ignore this warning message and hope, that the two versions are still compatible:

/** * Suppresses the warnings about mismatched ANTLR runtime/compilation version. * <p>ApexParser is using ANTLR 4.8, but PMD is using ANTLR 4.9.</p> */ public final class AntlrVersionCheckSuppression {

Describe the solution you'd like

Update Summit AST and apex-parser, remove this AntlrVersionCheckSuppression

Describe alternatives you've considered

Update apex-parser to use the same ANTLR version
Just reuse the antlr grammar from apex-parser and generate the parser in PMD (but we don't use the grammar directly, we use it through Summit AST)
Use apex-dev-tools with updated ANTLR

Additional context
Originated from TODO:

// TODO: log is not empty due to ANTLR versions, 4.9.1 vs 4.8, expect to resolve with apex-dev-tools switch log = log.replace("ANTLR Tool version 4.8 used for code generation does not match the current runtime version 4.9.1", ""); log = log.replace("ANTLR Runtime version 4.8 used for parser compilation does not match the current runtime version 4.9.1", "");

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