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terminal ID is not accepting only upper case letters [message #1470591]

Wed, 12 November 2014 08:15

Eclipse User

In org.eclipse.xtext.xbase.Xtype.xtext the terminal ID is defined by

terminal ID:
	'^'? ('a'..'z'|'A'..'Z'|'$'|'_') ('a'..'z'|'A'..'Z'|'$'|'_'|'0'..'9')*;

According to the Xtext Documentation:
Quote:

It says that a token ID starts with an optional '^' character (caret), followed by a letter ('a'..'z'|'A'..'Z') or underscore '_' followed by any number of letters, underscores and numbers ('0'..'9').

So far, so good.

But if I want to use "ATX" as ID I got the error "mismatched input 'ATX' expecting RULE_ID". With 'B2' the same. But 'Atx' is fine.

My corresponding rule is:

Entity:
	'entity' name=ID '{'...'}'

Can anybody please explain me what I'm doing wrong?

Re: terminal ID is not accepting only upper case letters [message #1470597 is a reply to message #1470591]

Wed, 12 November 2014 08:20

Eclipse User

hi is ATX a keyword in your grammar?

Re: terminal ID is not accepting only upper case letters [message #1470614 is a reply to message #1470597]

Wed, 12 November 2014 08:31

Eclipse User

Christian Dietrich wrote on Wed, 12 November 2014 14:20

hi is ATX a keyword in your grammar?

Oh, this I've missed to mention. No ATX is not a keyword, instead I can exchange ATX with ABC with the same result.

Re: terminal ID is not accepting only upper case letters [message #1470617 is a reply to message #1470614]

Wed, 12 November 2014 08:34

Eclipse User

do you have any other terminals defined? can you share a minimal grammar?

Re: terminal ID is not accepting only upper case letters [message #1471530 is a reply to message #1470617]

Thu, 13 November 2014 01:27

Eclipse User

Thanks Christian.

You pushed me in the right direction. The grammar still contained an old, no longer used, terminal definition which caused the problem:

terminal ENUM_NAME:
    ('A'..'Z' | '_') ('A'..'Z' | '_' | '0'..'9')*;

[Updated on: Thu, 13 November 2014 01:28] by Moderator

Re: terminal ID is not accepting only upper case letters [message #1471735 is a reply to message #1470614]

Thu, 13 November 2014 04:46

Eclipse User

Could you provide the complete grammar and maybe a unit test?
I just tried an all uppercase keyword and it works.

Regards,
Sebastian
--
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Re: terminal ID is not accepting only upper case letters [message #1471757 is a reply to message #1471735]

Thu, 13 November 2014 05:04

Eclipse User

Sebastian Zarnekow wrote on Thu, 13 November 2014 10:46

Could you provide the complete grammar and maybe a unit test?
I just tried an all uppercase keyword and it works.

The problem is solved. It was my error because I had the not longer used terminal ENUM_NAME I posted before.

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