Hey 轶凡, You might like to match the elseif_part and else_part with an any. Then continue the walk on the correct branch.
ifs: ^(IF test a=. b=.) ; Have a look at a previous post that does something similar. http://www.antlr.org/pipermail/antlr-interest/2011-April/041307.html Regards Gary On Fri, Sep 23, 2011 at 12:47 AM, 轶凡 <yifan....@taobao.com> wrote: > Hi, gurus, I defined a tree grammar which contains if statements, it looks > like below: > > ifs: ^(IF test elseif_part else_part) ; > > In normal, this rule will generate source code as below: > > test(); //it will return a boolean value > .... > elseif_part(); > .... > else_part(); > > As you see, if the rule 'test' is ok in some conditions, there's no need to > evaluate rule 'elseif_part' and 'else_part'. > What I need is conditional tree node expansion. Ideally generated code in my > mind: > > if (test()) > { > //skip elseif_part and else_part > }else{ > elseif_part(); > if (some condition was satisfied){ > //skip else_part; > }else{ > else_part(); > } > } > > Hope for you help, thanks! > > > This email (including any attachments) is confidential and may be legally > privileged. If you received this email in error, please delete it immediately > and do not copy it or use it for any purpose or disclose its contents to any > other person. Thank you. > > 本电邮(包括任何附件)可能含有机密资料并受法律保护。如您不是正确的收件人，请您立即删除本邮件。请不要将本电邮进行复制并用作任何其他用途、或透露本邮件之内容。谢谢。 > > List: http://www.antlr.org/mailman/listinfo/antlr-interest > Unsubscribe: > http://www.antlr.org/mailman/options/antlr-interest/your-email-address > List: http://www.antlr.org/mailman/listinfo/antlr-interest Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-email-address -- You received this message because you are subscribed to the Google Groups "il-antlr-interest" group. To post to this group, send email to il-antlr-inter...@googlegroups.com. To unsubscribe from this group, send email to il-antlr-interest+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/il-antlr-interest?hl=en.
