[antlr-interest] C++ target Problem (typedef)

[Gokulakannan Somasundaram]

Thanks for testing the C++ grammar. Please do mention the compiler in which
you are doing the testing.

What you are seeing is not a bug. You should explicitly write a Traits
file. If you look at the example, you might understand.
After writing the TraitsFile, you have to include the file in @includes.

Suppose you are generating legacyDevCfgLexer.hpp(.cpp) and
legacyDevCfgParser.hpp(.cpp), then you write a TraitsFile like this.

using namespace antlr3;

namespace {yours} {
      #include <antlr3traits.hpp>

      typedef Traits<legacyDevCfgLexer, legacyDevCfgParser>
legacyDevCfgTraits;
      typedef legacyDevCfgTraits legacyDevCfgLexerTraits;
      typedef legacyDevCfgTraits legacyDevCfgParserTraits;
};

This will create a traits definition with all defaults. The traits is
required in C++, as we do change the definition at compile time using
metaprogramming. Please let me know, if you need any help and let me know,
if you find any bugs.

Thanks,
Gokul.

On Fri, Feb 17, 2012 at 10:51 PM, Oliver Kowalke <oliver.kowalke at gmx.de>wrote:

> Hi,
>
> I'm happy to see a runtime for C++.
>
> Unfortunately I get an error:
> The grammer is named 'legacyDevCfg' and in the lexer header file
> (legacyDevCfgLexer.hpp) a typedef is declared:
>
> typedef legacyDevCfgLexerTraits legacyDevCfgLexerImplTraits;
>
> But legacyDevCfgLexerTraits is not defined in the files (grep
> legacyDevCfgLexerTraits *) :/
>
> echo $CLASSPATH
> /home/abc/Projekte/Antlr/antlr_with_cpp-3.4.jar
>
> g++ -W -Wall -g -pthread -I.-I./Cpp/include  -c -o main.o main.cpp
>
> -> error: »legacyDevCfgLexerTraits« is not a type
>
> any ideas?
>
> thx,
> Oliver
>
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