Grammar development on Rats and other PEG tools

[yshinya6]

I need a syntax definition of cello language in several PEG-based tools.
We can develop these grammar smoothly by translating the grammar written in Nez

The list of target PEG-based tool is described as follows:

• Rats!
• mouse
• PEGTL
• lpeg

[yshinya6]

a Rats parser is developed by 5474299.