Using Antlr4 Golang runtime with visitor

[std...@gmail.com]

Im relative new to Antlr, and I want to make a project using antlr with go runtime but I dont find examples on how to use the visitor generated in this language.

[Gary Miller]

Getting visitors into the Go target is currently being worked on.

The code isn't stable yet, but should be soon.

You can follow the github issue if you're interested.

https://github.com/antlr/antlr4/issues/1843

https://github.com/antlr/antlr4/pull/1841

[Eugene Dzhurinsky]

Any updates on that? I am trying to experiment with the visitors for Golang, but so far looks like the generated code is something like:

type BaseHOCONVisitor struct {
 *antlr.BaseParseTreeVisitor
}


func (v *BaseHOCONVisitor) VisitHocon(ctx *HoconContext) interface{} {
 return v.VisitChildren(ctx)
}


func (v *BaseHOCONVisitor) VisitObj(ctx *ObjContext) interface{} {
 return v.VisitChildren(ctx)
}

and in turn

type BaseParseTreeVisitor struct{}


var _ ParseTreeVisitor = &BaseParseTreeVisitor{}


func (v *BaseParseTreeVisitor) Visit(tree ParseTree) interface{}            { return nil }
func (v *BaseParseTreeVisitor) VisitChildren(node RuleNode) interface{}     { return nil }
func (v *BaseParseTreeVisitor) VisitTerminal(node TerminalNode) interface{} { return nil }
func (v *BaseParseTreeVisitor) VisitErrorNode(node ErrorNode) interface{}   { return nil }

Am I missing something? Because from this generated code it looks like the tree visitor visits nothing.

ANTLR Parser Generator  Version 4.7