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Grammar Name Conflict Golang with SPARQL issue

See original GitHub issue

Hi! So im trying to build a simple sparql parser for golang. Got the grammar for it from here: https://github.com/antlr/grammars-v4/tree/master/sparql

Then i ran this command to generate the code: java -jar antlr-4.10.1-complete.jar -Dlanguage=Go -o parser Sparql.g4

Now, after i included it into a Go program, without even using it, it errors out with this:

parser/sparql_parser.go:9806:9: cannot use s (variable of type *RdfLiteralContext) as type antlr.RuleContext in return statement:
	*RdfLiteralContext does not implement antlr.RuleContext (wrong type for String method)
		have String() IStringContext
		want String([]string, antlr.RuleContext) string
parser/sparql_parser.go:9829:13: cannot use NewRdfLiteralContext(p, p.GetParserRuleContext(), p.GetState()) (value of type *RdfLiteralContext) as type IRdfLiteralContext in assignment:
	*RdfLiteralContext does not implement IRdfLiteralContext (wrong type for String method)
		have String() IStringContext
		want String([]string, antlr.RuleContext) string

From what i’ve seen in another issue, i think this might be related to some grammar name conflicts with the code generation, but i dont know how to fix it. If someone recognizes the problem, i’ll be glad to make the changes myself and open a pull request.

Thanks 😃

Issue Analytics

State:
Created a year ago
Comments:9 (5 by maintainers)

Top GitHub Comments

1reaction

jimidlecommented, Aug 23, 2022

go.mod is updated and go.sum is added to the repo. We can close this when the PR is merged.

@parrt There are I think 3 outstanding PRs to fix go runtime bugs. I could merge them but do not have permissions (which also means I cannot get a free Github copilot license 😉

1reaction

jimidlecommented, Aug 22, 2022

Cool. Thanks for the verify.

On Mon, Aug 22, 2022 at 21:00 Ken Domino @.***> wrote:

@jimidle https://github.com/jimidle Yes, your fix works (git clone https://github.com/jimidle/antlr4.git; cd antlr4; git checkout feature/3758; …, but with the caveat that I need to “cd antlr4/runtime/Go/antlr4; go get golang.org/x/exp/slices”).

— Reply to this email directly, view it on GitHub https://github.com/antlr/antlr4/issues/3758#issuecomment-1222326262, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAJ7TMF5XHKCQPBCN23CZF3V2N2XDANCNFSM5ZOFG7ZQ . You are receiving this because you were mentioned.Message ID: @.***>

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