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Define a grammar to force the user to add a new line for every new entry in DSL editor [message #1814224]

Fri, 06 September 2019 02:36

Eclipse User

Dear All,

I have an use case where i need to allow the user to enter an new line for every entry for some rule in editor.

For Ex:

If entries like A, B, C, D and these entries come from model, i need to allow user to define these entries in editor like

entries : A
B
C
D
How to implement this use case in grammar and also proposal provider

Thank you

Re: Define a grammar to force the user to add a new line for every new entry in DSL editor [message #1814372 is a reply to message #1814224]

Tue, 10 September 2019 08:00

Eclipse User

Usually newlines are handled as hidden tokens and thus be ignored. Whitespace are handled with the WS terminal rule from common Terminals. You'd need to overwrite the WS rule and make a different rule for newlines to enforce newlines before a certain rule. Although I'd handle this not by grammar, but rather by validation. You could also access the node model to implement a validation rule and check for newlines. For content assist, customize the content assist provider. The created proposals contains the text to be inserted at a certain position. This could include newlines.

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