[stringtemplate-interest] Replacing double quotes by single quotes in output strings?
Thierry Coq
tcoq at free.fr
Sat Dec 19 06:03:02 PST 2009
Thanks for this hint. I searched for an existing xxxTarget.Java, and the
Delphi port was exactly what I was looking for. The generated code now
compiles, but I need to fill in the equivalent of the ANTLR runtime
code. Luckily for me, I ported lex & yacc some years back so it
shouldn't be an issue.
Later I will change the language name so that it doesn't use the
original "Delphi" word. I'll probably use FPC/Lazarus (FPC stands for
Free Pascal Compiler).
Best regards,
Thierry
Terence Parr wrote:
> If you are trying to build a new target for ANTLR, then what you should do is create a PascalTarget.java like we have CTarget.java etc. and then fill in the methods that do the appropriate conversions.
>
> Ter
> On Dec 17, 2009, at 1:52 PM, Thierry Coq wrote:
>
>
>> OK. I'll do that. This means I'll have to recompile ANTLR, this will
>> take some time as I'm not familiar with this particular operation.
>>
>> Thanks,
>>
>> Thierry
>> Terence Parr wrote:
>>
>>> either you need a renderer or modify the objcts going into the template so toString flips the " and '.
>>> T
>>> On Dec 17, 2009, at 9:27 AM, Thierry Coq wrote:
>>>
>>>
>>>
>>>> Hello Jim,
>>>>
>>>> thanks for your interest.
>>>>
>>>> Yes I'm using ANTLR to generate a Pascal Parser and Lexer, and I'm using
>>>> a small expression calculator grammar as an example. In order to do that
>>>> I need to write another set of ST rules to change the target language.
>>>>
>>>> the grammar start like this: (Expr.g)
>>>> grammar Expr;
>>>> options {language=Lazarus;}
>>>> ...
>>>> //the rest of the grammar is like existing grammars in ANTLR.
>>>>
>>>> The resulting code is like this (for the tokens table):
>>>> TOKENS_NAMES: array[0..TOKEN_COUNT] of String = (
>>>> "<invalid>",
>>>> "<EOR>",
>>>> "<DOWN>",
>>>> "<UP>",
>>>> "WS",
>>>> //..
>>>> "'+'",
>>>> //..
>>>> );
>>>>
>>>> This doesn't work in Pascal. I'm trying to get:
>>>> TOKENS_NAMES: array[0..TOKEN_COUNT] of String = (
>>>> '<invalid>',
>>>> '<EOR>',
>>>> '<DOWN>',
>>>> '<UP>',
>>>> 'WS",
>>>> //..
>>>> '''+''',
>>>> //..
>>>> );
>>>>
>>>> The rule I use for ST is this one:
>>>> <if(grammar.IsGrammarRoot)>
>>>> const
>>>> TOKEN_COUNT = <length(tokenNames)>+3;
>>>> TOKENS_NAMES: array[0..TOKEN_COUNT] of String = (
>>>> '<invalid>',
>>>> '<EOR>',
>>>> '<DOWN>',
>>>> '<UP>',
>>>> <tokenNames:{<it>}; separator=",\n">
>>>> );
>>>> <endif>
>>>>
>>>> I'm wondering how I can introduce a regexp expression in the tokenNames
>>>> rules above to replace the chars ' by '' and " by '.
>>>>
>>>> Best regards,
>>>> Thierry
>>>>
>>>> Jim Idle wrote:
>>>>
>>>>
>>>>> Thierry,
>>>>>
>>>>> Sorry but I am still not quite following you. Are you saying that your parser is generated in Java and you want to generate it in Pascal? Or that you have a parser whose output is created by a StringTemplate? Changing the string delimiters should be trivial for the latter case, but there is no way to make the Java output of ANTLR be Pascal without writing a Pascal language target.
>>>>>
>>>>> Can you post a small example of what you are trying to achieve?
>>>>>
>>>>> Jim
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Thierry Coq [mailto:tcoq at free.fr]
>>>>>> Sent: Tuesday, December 15, 2009 9:41 PM
>>>>>> To: Jim Idle
>>>>>> Subject: Re: [stringtemplate-interest] Replacing double quotes by
>>>>>> single quotes in output strings?
>>>>>>
>>>>>> Jim,
>>>>>>
>>>>>> thank you for your prompt answer.
>>>>>>
>>>>>> I'm working with ANTLR which is using StringTemplate.
>>>>>>
>>>>>> ANTLR generates code using the StringTemplate. Of course, I don't want
>>>>>> to touch ANTLR or StringTemplate to use them to generate code. So I'm
>>>>>> limited to using string template *.st and *.stg files to do the job.
>>>>>>
>>>>>> In ANTLR, the tokens are declared as Java strings and output to the
>>>>>> generated code as java strings, as-is something rather uncompilable for
>>>>>> Pascal. I need to be able, once the tokens have been analyzed by ANTLR
>>>>>> to generate them in a format understandable by pascal, aka replacing
>>>>>> the
>>>>>> double quotes by simple one, and doubling the simple quotes within the
>>>>>> strings, if any.
>>>>>>
>>>>>> Is this possible?
>>>>>>
>>>>>> Best regards,
>>>>>> Thierry
>>>>>>
>>>>>> Jim Idle wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Not sure what you are asking for to be honest. Are just wanting to
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> escape characters? Do you mean StringTemplate and not ANTLR? If you
>>>>>> means StringTemplate then perhaps you need a renderer method, but
>>>>>> generally you should do such replacements in the model and not in the
>>>>>> template.
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Jim
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> -----Original Message-----
>>>>>>>> From: stringtemplate-interest-bounces at antlr.org
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>> [mailto:stringtemplate-
>>>>>>
>>>>>>
>>>>>>
>>>>>>>> interest-bounces at antlr.org] On Behalf Of Thierry Coq
>>>>>>>> Sent: Tuesday, December 15, 2009 12:52 PM
>>>>>>>> To: stringtemplate-interest at antlr.org
>>>>>>>> Subject: [stringtemplate-interest] Replacing double quotes by single
>>>>>>>> quotes in output strings?
>>>>>>>>
>>>>>>>> Hello,
>>>>>>>>
>>>>>>>> is it possible to replace a double-quoted string, for example "HS"
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>> by
>>>>>>
>>>>>>
>>>>>>
>>>>>>>> single quotes: 'HS', and double single quotes when needed: for
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>> example:
>>>>>>
>>>>>>
>>>>>>
>>>>>>>> "'='" becomes '''=''', in the ANTLR code generator?
>>>>>>>>
>>>>>>>> I'm looking for a regexp, but I can't seem to find it.
>>>>>>>>
>>>>>>>> Best regards,
>>>>>>>> Thierry
>>>>>>>> _______________________________________________
>>>>>>>> stringtemplate-interest mailing list
>>>>>>>> stringtemplate-interest at antlr.org
>>>>>>>> http://www.antlr.org/mailman/listinfo/stringtemplate-interest
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
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>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
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>>>
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>>>
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