I have to admit that I'm not an expert on reader macros, so I can't say for sure. Your example seems to map some already used characters, so it wouldn't be a pu

I have to admit that I'm not an expert on reader macros, so I can't say for sure. Your example seems to map some already used characters, so it wouldn't be a pure extension of the reader. I guess you could make a readtable that recognizes that syntax and transforms it to the tree-like semantics. FWIW, I don't find it more readable than the standard notation. Maybe I have become too accustomed to the standard CL-notation.