Trying to compile on MacOS results in macro error about cascade HOT 5 CLOSED

This error is coming from a source file generated by bison as the source file gets generated on build.

I get this same error with msys2 gcc 7.3.0 and bison 3.2. I looked at the OSX homebrew bison package and it uses bison 3.2.1 which is the latest (released 2018-11).

@ajsutrave the project builds successfully if you use either bison 3.0.4 or 3.1. It must be some issue with the new minor version release.

Would be great if someone could figure out why bison 3.2.* is causing the error message.

from cascade.

I think the issue is that YY_RVREF is a macro. The preprocessor don't know anything about templates, so it's interpreting the comma in the templated type as an argument separator. Essentially, it's parsing the statement as:

YY_VREF((std::pair < T1) , (T2>))

rather than

YY_VREF((std::pair<T1, T2>));

We can fix this by adding typedefs to verilog.yy:

typedef std::pair<T1, T2> temp_name

and then referring to the typedef everywhere else in verilog.yy so that when bison gets around to codegen we end up with

YY_RVREF(temp_name)

I'll update the FAQ at the end of the README with notes about which versions of bison work until this gets sorted out.

from cascade.

Downgrading bison worked for me. Let us know if you do end up typedefing the template

from cascade.

Will do --- reopening this ticket as a fix request now that we know what's going on.

from cascade.

(Fixed as of most recent pull request.)

from cascade.