The cond macro, for example. It had all those gratuitous parentheses [...] I wouldn't be surprised if someone had already discovered the Arc trick of collapsing

The cond macro, for example. It had all those gratuitous parentheses [...] I wouldn't be surprised if someone had already discovered the Arc trick of collapsing if and cond into one operator That's done among others by metalua. In AST view, an if-then-elseif-end statement is seen as: `If{ cond1, block1, cond2, block2, ... condn, blockn, default_block } Qi also did a great job of cleaning up a lispy syntax. Too bad it hasn't got macros...