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Editorial Team
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Asked: 2026-05-15T10:46:16+00:00

I have a tree parser that’s doing semantic analysis on the AST generated by

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I have a tree parser that’s doing semantic analysis on the AST generated by my
parser. It has a rule declared as follows:

transitionDefinition throws WorkflowStateNotFoundException: /* ... */

This compiles just fine and matches the rule syntax at the ANTLR Wiki
but my exception is never
declared so the Java compiler complains about undeclared exceptions.

./tool/src/main/antlr3/org/antlr/grammar/v3/ANTLRv3.g shows that it’s building
a tree (but I’m not actually positive if it’s the v2 or v3 grammar that ANTLR
3.2 is using):

throwsSpec
    :   'throws' id ( ',' id )* -> ^('throws' id+)
    ;

I know I can make it a runtime exception, but I’d like to use my exception
hierarchy. Am I doing something wrong or should that syntax work?

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1 Answer

  1. Editorial Team

    It looks like this is a known issue: http://www.antlr.org/jira/browse/ANTLR-100

    Unfortunate, as I’m trying to do the same thing.

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