Get the list of attribute arguments

[agladilin]

cppparser/test/unit/attribute-specifier-sequence.cpp

Line 29 in a37d273

[[xnet::HttpGet]] [[xnet::Route("/players")]] std::string GetPlakMpPlayers(std::string first_name);

Hello,
I cannot get the list of arguments from the attribute.
Could you help with an example on how to get the "/players" value from xnet::Route attribute?

[satya-das]

Added 3009fd4 to demonstrate how to do it.

I do think the model regarding expression needs improvements, at least to the extent that the usage of CppExpr becomes easier. I will appreciate a pull-request if you have any suggestion to improve this.

[agladilin]

Thanks a lot! It works.

However, it is still not clear how can we have multiple arguments for the attribute?

Regarding the attribute API, I think that it would be convenient to make the AttributeSpecifier look like the CppFunction. I will try it out.

[satya-das]

I think that it would be convenient to make the AttributeSpecifier look like the CppFunction.

I don't think so. CppFunction is for function declaration/definition. Attribute specifiers are like expressions, for which CppExpr can be used. CppExpr is for function calls as well and so it is used to model attribute specifiers.

However, it is still not clear how can we have multiple arguments for the attribute?

I will add a similar test for CppExpr that handles function call with multiple arguments. In the meantime you can take a look at CppWriter::emitExpr() that writes C++ text from AST.

There is an e2e test that creates C++ files from the parsed AST. When cppparsertest is run then all files in test/e2e/test_input are parsed and parsed ASTs are converted back to C++ files in test/e2e/test_output.
Files in test/e2e/test_output are compared against files in test/e2e/test_master to detect error.

You can debug e2e test, i.e. cppparsertest, to see how you can access information of any CppObj.

Pro tip: You can delete all files and folders from test/e2e/test_input and add only one file for which you want to debug cppparsertest. Just make sure that you don't commit the deleted files. :).