[antlr-interest] (Antlr C Target) Need help converting uint8_t to string

[Jay T]

Nevermind, I answered my own question I think ... not sure if it is the
golden solution but just worked for me...

J



declarator [string &typeName]
    :    ID     {
                    uint8_t *widget;
                    widget = ($ID.text->chars);
                    typeName.append(1,*widget);
            }
    ;


PS. Please forgive my dumb / unintentional nuisance questions.





On Sun, Sep 5, 2010 at 4:37 PM, Jay T <dr.jaymahdi at gmail.com> wrote:

> Hi everyone:
>
> I am very new to Antlr so please be patient with me.
> I am writing a grammar that will be generated for a C target, compiled
> using C++.
>
> The problem I have is I am trying to convert a token text into a string
> text which will be used for my internal data structures written in C++.
> One error that I keep getting is " ToyParser.c:415: error: invalid
> conversion from ‘uint8_t*’ to ‘char’ ".
> I have searched exhaustively on Google trying to figure out how to convert
> a uint8_t to a string and unfortunately could not find any resolution -- so
> hopefully an Antlr C programmer guru can give me some advice on how to a
> solution to this problem.
>
> Below is a "Toy" Grammar file. I am simply trying to convert any received
> token text into a string, and use this as a basis to convert certain tokens
> to int's for my own custom data structure.
>
> If someone could please kindly respond, it would be greatly appreciated.
>
> Thanks
>
>
>
>
>
>
>
> grammar Toy;
>
> options {
>   language = C;
> }
>
> @Scope
> {
>     string typeName;
> }
>
> @header
> {
>     #include <iostream>
>     #include <string>
>     #define ANTLR3_INLINE_INPUT_ASCII
>
>     using namespace std;
> }
>
>
> @members
> {
>
> #include <iostream>
> #include <string>
> #include "ToyLexer.h"
>
> using namespace std;
>
> int main(int argc, char * argv[])
> {
>
>   pANTLR3_INPUT_STREAM           input;               //Create the input
> stream
>   pToyLexer               lex;
> //Lexer supplied by pANTLR3_INPUT_STREAM (Translate to tokens)
>   pANTLR3_COMMON_TOKEN_STREAM    tokens; //Token stream supplied by parser
> (Store tokens)
>   pToyParser              parser;                                  //Parser
> gets the tokens and sementally understands the tokens in order
>
>
>
>   input  = antlr3AsciiFileStreamNew          ((pANTLR3_UINT8)argv[1]);
>             //Provide file input
>   lex    = ToyLexerNew                (input);
>                               //Create instance of lexer and set it to the
> file name input
>   tokens = antlr3CommonTokenStreamSourceNew  (ANTLR3_SIZE_HINT,
> TOKENSOURCE(lex));    //Create token stream from the lexer
>   parser = ToyParserNew               (tokens);
>                                                       //Feed in tokens into
> the parser
>
>   string Name;
>
>   parser  ->declarator(parser, Name);
>                             //Call the parser rule
>
>   parser ->free(parser);
>   tokens ->free(tokens);
>   lex    ->free(lex);
>   input  ->close(input);
>
>   cout << "Received name: " << Name << endl;
>
>   return 0;
>  }
>
> }
>
>
>
>
> //----- PARSER RULES -----//
>
> declarator [string &typeName]
>     :    ID     {
>                 typeName.append(1,$ID.text->chars);
>             }
>     ;
>
> //----- LEXER RULES -----//
>
> ID
>     :    ('A'..'Z' | 'a'..'z')+
>     ;
>
> DIGIT
>     :    ('0'..'9')+
>     ;
>
> WS
>     :    (' ' | '\t' | '\r' | '\f' | '\n')+ {$channel=HIDDEN;}
>     ;
>
>