%MACRO { x ( x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Comment
                 ^ Type
                   ^ Operator
%MACRO { x (x x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^ Comment
                  ^ Type
                    ^ Operator
%MACRO { x (x x )x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^^ Comment
                   ^ Comment
                     ^ Type
                       ^ Operator
%MACRO { x (x) x )x()() x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^^ Comment
               ^ Comment
                 ^^^^^^ Comment
                        ^ Comment
                          ^ Comment
                            ^ Type
                              ^ Operator
%MACRO { x (x) x)X )x()() x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^^ Comment
               ^^^ Comment
                   ^^^^^^ Comment
                          ^ Comment
                            ^ Comment
                              ^ Type
                                ^ Operator
%MACRO { x (
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
    BRK LIT2kr @label/label &sublabel
    ^^^ Comment
        ^^^^^^ Comment
               ^^^^^^^^^^^^ Comment
                            ^^^^^^^^^ Comment
    .label #12 #abcd $1 |100 ~lib.tal
    ^^^^^^ Comment
           ^^^ Comment
               ^^^^^ Comment
                     ^^ Comment
                        ^^^^ Comment
                             ^^^^^^^^ Comment
    "string [ ]
    ^^^^^^^ Comment
            ^ Comment
              ^ Comment
) x }
^ Comment
  ^ Type
    ^ Operator

%MACRO { X( x )X ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^^ Type
            ^ Type
              ^^ Type
                 ^ Type
                   ^ Type
                     ^ Operator

( Nested comments )
^ Comment
  ^^^^^^ Comment
         ^^^^^^^^ Comment
                  ^ Comment
%MACRO { x ( x ( x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Comment
                 ^ Comment
                   ^ Comment
                     ^ Comment
                       ^ Comment
                         ^ Type
                           ^ Operator
%MACRO { x (x x ( x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^ Comment
                  ^ Comment
                    ^ Comment
                      ^ Comment
                        ^ Comment
                          ^ Type
                            ^ Operator
%MACRO { x ( x ( x )x x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Comment
                 ^ Comment
                   ^^ Comment
                      ^ Comment
                        ^ Comment
                          ^ Comment
                            ^ Comment
                              ^ Type
                                ^ Operator
%MACRO { x (x x ( x )x x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^ Comment
                  ^ Comment
                    ^^ Comment
                       ^ Comment
                         ^ Comment
                           ^ Comment
                             ^ Comment
                               ^ Type
                                 ^ Operator
%MACRO { x ( x ( x ( x ) x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Comment
                 ^ Comment
                   ^ Comment
                     ^ Comment
                       ^ Comment
                         ^ Comment
                           ^ Comment
                             ^ Comment
                               ^ Comment
                                 ^ Type
                                   ^ Operator

( Not nested -- inner comment has other characters after the `(` )
^ Comment
  ^^^ Comment
      ^^^^^^ Comment
             ^^ Comment
                ^^^^^ Comment
                      ^^^^^^^ Comment
                              ^^^ Comment
                                  ^^^^^ Comment
                                        ^^^^^^^^^^ Comment
                                                   ^^^^^ Comment
                                                         ^^^ Comment
                                                             ^^^ Comment
                                                                 ^ Comment
%MACRO { x ( x (x x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^^ Comment
                  ^ Comment
                    ^ Comment
                      ^ Type
                        ^ Type
                          ^ Type
                            ^ Operator
%MACRO { x (x x (x x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^^ Comment
                   ^ Comment
                     ^ Comment
                       ^ Type
                         ^ Type
                           ^ Type
                             ^ Operator
%MACRO { x (x x (x )x ) x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^^ Comment
                   ^^ Comment
                      ^ Comment
                        ^ Type
                          ^ Operator
                            ^ Type
%MACRO { x (x x (x x ) x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^^ Comment
                   ^ Comment
                     ^ Comment
                       ^ Type
                         ^ Operator
                           ^ Type

( Unclosed comments )
^ Comment
  ^^^^^^^^ Comment
           ^^^^^^^^ Comment
                    ^ Comment
%MACRO { x ( x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Operator
                 ^ Type
%MACRO { x (x x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^ Operator
                  ^ Type
%MACRO { x (x ( x ) x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^^ Comment
              ^ Comment
                ^ Comment
                  ^ Comment
                    ^ Comment
                      ^ Operator
                        ^ Type

( Nested macros )
^ Comment
  ^^^^^^ Comment
         ^^^^^^ Comment
                ^ Comment
%MACRO { x ( x %NESTED x ) x } ( Nested macro definition gets highlighted )
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Operator
                ^^^^^^ Special
                       ^ Comment
                         ^ Comment
                           ^ Type
                             ^ Operator
                               ^ Comment
                                 ^^^^^^ Comment
                                        ^^^^^ Comment
                                              ^^^^^^^^^^ Comment
                                                         ^^^^ Comment
                                                              ^^^^^^^^^^^ Comment
                                                                          ^ Comment
%MACRO { x ( x ( x %NESTED x ) x ) x }
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Comment
                 ^ Comment
                   ^ Operator
                    ^^^^^^ Special
                           ^ Comment
                             ^ Comment
                               ^ Comment
                                 ^ Comment
                                   ^ Type
                                     ^ Operator
%MACRO { x ( x %NESTED { x } x
^ Operator
 ^^^^^ Special
       ^ Operator
         ^ Type
           ^ Comment
             ^ Comment
               ^ Operator
                ^^^^^^ Special
                       ^ Comment
                         ^ Comment
                           ^ Operator
                             ^ Type

( Macros in comments )
^ Comment
  ^^^^^^ Comment
         ^^ Comment
            ^^^^^^^^ Comment
                     ^ Comment
x ( x %MACRO { x } x ) x
^ Type
  ^ Comment
    ^ Comment
      ^^^^^^ Comment
             ^ Comment
               ^ Comment
                 ^ Comment
                   ^ Comment
                     ^ Comment
                       ^ Type
x ( } ) x
^ Type
  ^ Comment
    ^ Comment
      ^ Comment
        ^ Type