How to change the sequence of statement in a continuous binary expression

[durianwaffle]

Hi Langium team, I have a continuous binary expression, now the grouping of statement is as shown in the black background.
But I want to change it to the one in the white background. How can I achieve this goal?

[msujew]

Hey @durianwaffle,

you can give an element in your expression chain a higher precedence by putting it closer to the end of the chain. In this case, you need to put and closer to the end of the chain than =.

[Lotes]

This link might help as well with more details. It is for Xtext, but the principle is the same :-) . Operator precedence is a classical problem in compiler theory and is normally solved by a special-shaped grammar.

[aabounegm]

@durianwaffle I had a similar problem and followed the instructions from the link sent by @Lotes. For reference, here is what I did: aabounegm/stella-experiment@1e1e222
Thought it might help

[durianwaffle]

Hi @msujew, may I know what's the version of langium the playground is using?
I found that the sequence for our grammar is correct in the playground.
But not working in langium version 3.0.

[spoenemann]

It should be 3.0.0, too:

https://github.com/eclipse-langium/langium-website/blob/39999f513d9fa449a7728b72ee38da37416437a1/hugo/package.json#L42

[durianwaffle]

Okay, thank you @spoenemann !