Question 1

How to use Gocc with Go modules?

Accepted Answer

Gocc currently relies on GOPATH, so you may need to set GO111MODULE=off or use workarounds; check the README for updates, as modern Go development favors modules.

Question 2

Gocc vs ANTLR for Go parsing?

Accepted Answer

Gocc is pure-Go and generates Go code natively, avoiding Java dependencies, but ANTLR supports more languages and grammar types; choose Gocc for simplicity in Go-only projects.

Question 3

How to handle errors in Gocc action expressions?

Accepted Answer

Action expressions must return an Attrib and an error; define error handling in your AST functions, as shown in the example where functions like NewWorld return errors.

Question 4

Can Gocc parse common formats like JSON or XML?

Accepted Answer

Yes, but it requires defining BNF grammars from scratch; for standard formats, existing Go libraries might be more efficient unless you need custom extensions.

Question 5

How to generate only the lexer with Gocc?

Accepted Answer

Use command-line flags; the README mentions Gocc can generate standalone components like lexers or parsers independently, though specifics are not detailed.

Question 6

Gocc or yacc for Go projects?

Accepted Answer

Gocc is native to Go and avoids C toolchain dependencies, while yacc may require external setup; Gocc is better for pure-Go ecosystems but has a steeper learning curve for BNF.

gocc

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