CST to AST transformations
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CST to AST transformations
by Henrique Rocha
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Hi,
I'm having a really hard time trying to understand some aspects of this functionality. I want a program to be a list of declarations or function definitions. How would I do the transformations? program = decl_or_def* {-> New program([decl_or_def]) }; decl_of_def {-> ????? } = /* what should I place here? */ {typedef} typedef type id {-> New typedef(type, id); } | {function} function_definition {-> function_definition.function}; function_definition {-> function} = type id l_par params* r_par l_brace var_decl* statement* r_brace {-> New function(type, id, [params.param], [var_decl], [statement]) }; I know I'm doing something wrong, I just don't know why. Thanks very much. -- Henrique Rocha www.hmrocha.com ExpertRating Certified Windows XP Professional ExpertRating Certified Unix Shell Script Professional ExpertRating Certified Unix Professional ExpertRating Certified Object-Oriented Concepts Professional ExpertRating Certified Professional Computer Technician Skills ExpertRating Certified HTML 4 Professional _______________________________________________ SableCC-Discussion mailing list SableCC-Discussion@... http://lists.sablecc.org/listinfo/sablecc-discussion |
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Re: CST to AST transformations
by Henrique Rocha
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It worked. Thank you very, very much. =)
On Sat, Apr 11, 2009 at 8:29 PM, Christopher Van Kirk <chris.vankirk@...> wrote: > > That fragment is for the return type of the concrete production. The problem with yours is that you're trying to return two different types of abstract production. What you probably need to do is adjust your abstract definitions to group together the productions that you want to be related in this way...for example: > > decl_of_def {-> declaration } = /* what should I place here? */ > {typedef} typedef type id {-> New declaration.typedef(type, id); } > | {function} function_definition {-> New declaration.func_def( function_definition.function ) }; > > and in the AST section something like > > declaration > {typedef} type id | > {func_def} function > > > --- On Sun, 4/12/09, Henrique Rocha <hmrocha@...> wrote: > >> From: Henrique Rocha <hmrocha@...> >> Subject: CST to AST transformations >> To: "Discussion mailing list for the SableCC project" <sablecc-discussion@...> >> Date: Sunday, April 12, 2009, 1:13 AM >> Hi, >> >> I'm having a really hard time trying to understand some >> aspects of >> this functionality. >> I want a program to be a list of declarations or function >> definitions. >> How would I do the transformations? >> >> program = decl_or_def* {-> New program([decl_or_def]) >> }; >> >> decl_of_def {-> ????? } = /* what should I place here? >> */ >> {typedef} typedef type id {-> New >> typedef(type, id); } >> | {function} function_definition {-> >> function_definition.function}; >> >> function_definition {-> function} = >> type id l_par params* r_par l_brace var_decl* >> statement* r_brace >> {-> New function(type, id, >> [params.param], [var_decl], [statement]) }; >> >> I know I'm doing something wrong, I just don't know why. >> Thanks very much. >> >> -- >> Henrique Rocha >> www.hmrocha.com >> ExpertRating Certified Windows XP Professional >> ExpertRating Certified Unix Shell Script Professional >> ExpertRating Certified Unix Professional >> ExpertRating Certified Object-Oriented Concepts >> Professional >> ExpertRating Certified Professional Computer Technician >> Skills >> ExpertRating Certified HTML 4 Professional >> >> _______________________________________________ >> SableCC-Discussion mailing list >> SableCC-Discussion@... >> http://lists.sablecc.org/listinfo/sablecc-discussion >> > > _______________________________________________ > SableCC-Discussion mailing list > SableCC-Discussion@... > http://lists.sablecc.org/listinfo/sablecc-discussion > -- Henrique Rocha www.hmrocha.com ExpertRating Certified Windows XP Professional ExpertRating Certified Unix Shell Script Professional ExpertRating Certified Unix Professional ExpertRating Certified Object-Oriented Concepts Professional ExpertRating Certified Professional Computer Technician Skills ExpertRating Certified HTML 4 Professional _______________________________________________ SableCC-Discussion mailing list SableCC-Discussion@... http://lists.sablecc.org/listinfo/sablecc-discussion |
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