Is there a list of validation errors from paserError and lexerError provider?

[durianwaffle]

Hi Langium team,

The default validation errors from lexerError and paserError provider doesn't have localization. I want to override all the default validation error msgs because of localization need.

• I am wondering if I override paserError and lexerError provider, will the red squiggle lines disappear if there is paser error or lexer error? Or they will still be there?

• Is there a list of possible validation error msgs in paserError and lexerError provider so I can make sure I implemented all the checks in paserError and lexerError provider? Especially for the non-recoverable errors where AST node missed up.

[msujew]

Hey @durianwaffle,

for the parser errors, we already expose a ParserErrorMessageProvider in the parser part of the language services. You can override that to modify/translate the parser error messages.

For the lexer, you need to override the Lexer service yourself right now. I've submitted #1716 to make this easier as well.

[durianwaffle]

Hi @msujew, thanks for providing the default lexer error message provider. Do you know how to import DefaultLexerErrorMessageProvider? I tried to import it from langiumParser, but it doesn't exist.
langium/packages/langium/src/default-module.ts at main · eclipse-langium/langium

[msujew]

You should be able to to just import it using import { DefaultLexerErrorMessageProvider } from 'langium'. Are you using the latest version of Langium? The class has only been added in release 3.3 of Langium.