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

Wed, 12 November 2014 13:15

Tobias Wink

Messages: 20
Registered: September 2014

Junior Member

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?

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

Wed, 12 November 2014 13:20

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

hi is ATX a keyword in your grammar?

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

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

Wed, 12 November 2014 13:31

Tobias Wink

Messages: 20
Registered: September 2014

Junior Member

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.

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

Wed, 12 November 2014 13:34

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

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

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

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

Thu, 13 November 2014 06:27

Tobias Wink

Messages: 20
Registered: September 2014

Junior Member

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 06:28]

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

Thu, 13 November 2014 09:46

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

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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