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Error 'no viable alternative at character '<EOF>' [message #1070545]

Thu, 18 July 2013 07:30

chris yo

Messages: 146
Registered: February 2013

Senior Member

I have this grammar:

Model:
  definitions += Locations*
;

Locations:
  Global | Local
;

Global:
  '@Global_Save' path=STR2 ';'
;

Local: {Local}
  local='Locale' 'Save' ('To' path=STR2)? ';'
;

STR2 hidden():
   STRING2;

terminal STRING2: '"' -> '"' ;

I have this configuration in a text file:

@Global_Save "dir_01\";
Locale Save "dir_01\";

But I keep on getting this error:
ERROR:no viable alternative at character '<EOF>'
ERROR:mismatched input 'dir_01' expecting RULE_STR2
ERROR:mismatched input '\' expecting 'Locale'
ERROR:no viable alternative at character '<EOF>'

If I put "dir_01\" in @Global_Save, my generation works successfully. But if I use the same input in Locale, I get the errors I mentioned above. Does somebody know what the problem is?

I've tried setting the Local to "dir_01" and "dir_01/", and I did not get any errors.

[Updated on: Thu, 18 July 2013 07:36]

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Re: Error 'no viable alternative at character '<EOF>' [message #1071120 is a reply to message #1070545]

Fri, 19 July 2013 11:40

Ian McDevitt

Messages: 70
Registered: December 2012
Location: Belfast

Member

You have a syntax error on your second line.
According to your language, Locale Save can only be followed by 'To' or ';' but you have followed it with a ".

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Re: Error 'no viable alternative at character '<EOF>' [message #1077648 is a reply to message #1071120]

Fri, 02 August 2013 01:12

Hema Vidal

Messages: 1
Registered: August 2013

Junior Member

I have the same problem, but with the character ' '

-------------------
My grammar is:

Program_heading: "program" IDENTIFIER '(' Identifier_list ')' ';';

Identifier_list: IDENTIFIER ( ',' IDENTIFIER )*;

terminal IDENTIFIER: LETTER (LETTER | DIGIT)*;

terminal fragment LETTER: ('A'..'Z'|'a'..'z');

terminal fragment DIGIT:
('0'..'9')
;
----------------------

When i run in a new Eclipse Aplication, the follow program input make an ERROR(no viable alternative at character ' ')

program Program1 (id);.

Why this error occurs?
It was for the compiler simply ignore whitespace!

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Re: Error 'no viable alternative at character '<EOF>' [message #1078071 is a reply to message #1077648]

Fri, 02 August 2013 13:55

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

do you use terminals or not if so you have to redefine ws and set it to be hidden.

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

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Re: Error 'no viable alternative at character '<EOF>' [message #1096222 is a reply to message #1071120]

Wed, 28 August 2013 05:20

chris yo

Messages: 146
Registered: February 2013

Senior Member

Ian McDevitt wrote on Fri, 19 July 2013 07:40

You have a syntax error on your second line.
According to your language, Locale Save can only be followed by 'To' or ';' but you have followed it with a ".

I have edited the grammar.

@Global_Save "dir_01\";
Locale Save To "dir_01\";

Why can't I use "\" in the path? I am using terminal and have set STR2 to hidden.

Model:
  definitions += Locations*
;

Locations:
  Global | Local
;

Global:
  '@Global_Save' path=STR2 ';'
;

Local: {Local}
  local='Locale' 'Save' ('To' path=STR2)? ';'
;

STR2 hidden():
   STRING2;

terminal STRING2: '"' -> '"' ;

Report message to a moderator

Re: Error 'no viable alternative at character '<EOF>' [message #1096302 is a reply to message #1096222]

Wed, 28 August 2013 08:00

Christian Dietrich

Messages: 14665
Registered: July 2009

Senior Member

Hi,

have a look at Xtexts default STRINGValueConverter which does \\ escaping

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

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Re: Error 'no viable alternative at character '<EOF>' [message #1106352 is a reply to message #1096302]

Wed, 11 September 2013 01:59

chris yo

Messages: 146
Registered: February 2013

Senior Member

Hi,

I have read the documentation for string value converter. Do you have tutorial/example that can show me how to implement this?

I cannot do STRING2.toEscapedString, can I?

Thank you.

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