wonky hygiene

splice.sjs

macro $opt {
  case { $mac () } => {
    var mac = #{ $mac };
    var a = makeIdent('a', mac);
    var b = makeIdent('b', mac);

    var code1 = withSyntax($a = [a], $b = [b]) {
      return #{
        {
          if (b == 2) {
            a + b
          }
        }
      }
    }

    var code2 = withSyntax($a = [a], $b = [b], $block = code1) {
      return #{
        if (a == 1) $block
      }
    }

    var code3 = withSyntax($a = [a], $b = [b]) {
      return #{
        var $a = 1;
        var $b = 2;
      }
    }

    return code3.concat(code2);
  }
}

$opt()

Result:

var a$157 = 1;
var b$158 = 2;
if (a$109 == 1) {
    if (b$110 == 2) {
        a$109 + b$110;
    }
}