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Problems parsing ruby on rails files with xtext [message #1743033]

Fri, 09 September 2016 13:46

Eclipse User

Hi
I'm parsing Ruby on rails models with xtext.

I'm having problems parsing the las 3 lines of this sample (when there is no space between foreign_key and equals symbol (=).

belongs_to :school,:foreign_key => "model_id"
belongs_to "school", :foreign_key =>:model_id
belongs_to "school", :foreign_key =>"model_id"
belongs_to :school,:foreign_key=> "model_id"
belongs_to "school", :foreign_key=>:model_id
belongs_to "school", :foreign_key =>"school_id"

The xtext file is:

Main:
belongs_to+=BelongsTo*
;

BelongsTo returns BelongsTo:
'belongs_to' RWS+ name=(RUBY_SYMBOL|RUBY_STRING) (RWS*','RWS* ('foreign_key:'|':foreign_key'RWS*'=>')RWS*foreign_key=(RUBY_SYMBOL|RUBY_STRING))? (RWS*'\r'? '\n')
;

terminal RUBY_STRING: '"' -> '"'|"'"->"'";
terminal RUBY_METHOD_NAME: ('a'..'z'|'_') ('a'..'z'|'_'|'0'..'9')*'='?;
terminal RUBY_SYMBOL:':'RUBY_METHOD_NAME;
terminal RWS:(' '|'\t');

Thanks in advance, for any idea

Attachment: MyDsl.xtext
(Size: 0.54KB, Downloaded 94 times)
Attachment: samples.mydsl
(Size: 0.27KB, Downloaded 88 times)

Re: Problems parsing ruby on rails files with xtext [message #1743042 is a reply to message #1743033]

Fri, 09 September 2016 16:06

Eclipse User

you may try something like

Main:
  belongs_to+=BelongsTo*
;

BelongsTo returns BelongsTo:
  'belongs_to' RWS+ name=(RUBY_SYMBOL|RUBY_STRING) (RWS*','RWS* ('foreign_key:'|':foreign_key'RWS* ('=''>') )RWS*foreign_key=(RUBY_SYMBOL|RUBY_STRING))? (RWS*'\r'? '\n')
;

RUBY_METHOD_NAME: RUBY_METHOD_NAME_PREFIX ;
RUBY_SYMBOL:':'RUBY_METHOD_NAME;

terminal RUBY_STRING: '"' -> '"'|"'"->"'";
terminal RUBY_METHOD_NAME_PREFIX: ('a'..'z'|'_') ('a'..'z'|'_'|'0'..'9')*;
terminal RWS:(' '|'\t');

Re: Problems parsing ruby on rails files with xtext [message #1743043 is a reply to message #1743042]

Fri, 09 September 2016 16:11

Eclipse User

or

Main:
belongs_to+=BelongsTo*
;

BelongsTo returns BelongsTo:
'belongs_to' RWS+ name=(RUBY_SYMBOL|RUBY_STRING) (RWS*','RWS* ('foreign_key:'|':foreign_key'RWS*'=''>')RWS*foreign_key=(RUBY_SYMBOL|RUBY_STRING))? (RWS*'\r'? '\n')
;

terminal RUBY_STRING: '"' -> '"'|"'"->"'";
terminal RUBY_METHOD_NAME: ('a'..'z'|'_') ('a'..'z'|'_'|'0'..'9')*;
RUBY_SYMBOL:':'RUBY_METHOD_NAME '='?;
terminal RWS:(' '|'\t');

Re: Problems parsing ruby on rails files with xtext [message #1743053 is a reply to message #1743043]

Fri, 09 September 2016 22:47

Eclipse User

It works well

I had a misconception about terminals/rules use.

Thanks a lot

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