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How to customizing single line comment [message #1700126]

Tue, 30 June 2015 10:15

Jiang Li

Messages: 27
Registered: November 2014

Junior Member

Because of the restriction of our dsl language we cannot use SL_COMMENT terminal directly. We have own rule of "Comment" which is defined as a parser rule.

// '..' is the identifier of our comment rule just like '//'
Comment:
    '.' '.' (ID|INT|ANY_OTHER)*
;

Now we have a problem:
How can we insert/remove '..' with standard shortcut "Ctrl+/" ? Could we reimplement this feature anywhere in XText ?

Has anybody any idea for it? Rolling Eyes

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Re: How to customizing single line comment [message #1700151 is a reply to message #1700126]

Tue, 30 June 2015 12:32

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

org.eclipse.xtext.ui.editor.toggleComments.ISingleLineCommentHelper.getDefaultPrefixes(ISourceViewer, String)

Twitter : @chrdietrich
Blog : https://www.dietrich-it.de

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Re: How to customizing single line comment [message #1700187 is a reply to message #1700151]

Tue, 30 June 2015 14:49

Jiang Li

Messages: 27
Registered: November 2014

Junior Member

Christian Dietrich wrote on Tue, 30 June 2015 12:32

org.eclipse.xtext.ui.editor.toggleComments.ISingleLineCommentHelper.getDefaultPrefixes(ISourceViewer, String)

Thanks for your useful hints. It helps me so much.

But still a problem could not be solved. We have following grammar:

// this is not comment
..!meta foo bar

//following 2 line are comments
..!foo bar
..foo bar

It means that every line which begins with '..' is a comment except that begins with '..!meta'.

Now the problem is:
When I type 'ctrl+/' at line '..!meta foo bar', it removes the prefix '..'. But I want to insert '..' before '..!meta'.

How can I do it? Should I reimplement ToggleSLCommentAction? If yes, where is this Action called or injected?

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