21|   expr   |>>Matched action<< (return value:     |
  |          |[1.4e-06])                            |
21|   expr   |>>Matched production: [number operator|
  |          |expr]<<                               |
21|   expr   |>>Matched rule<< (return value: [1.4e-|
  |          |06])                                  |
21|   expr   |(consumed: [ 1.40 * 1e-6])            |
20|   else   |>>Matched subrule: [expr]<< (return   |
  |          |value: [1.4e-06]                      |
20|   else   |Trying action                         |
20|   else   |>>Matched action<< (return value:     |
  |          |[1.4e-06])                            |
20|   else   |>>Matched production: [/else/i expr]<<|
20|   else   |>>Matched rule<< (return value: [1.4e-|
  |          |06])                                  |
20|   else   |(consumed: [ else 1.40 * 1e-6])       |
19|ifthenelse|>>Matched repeated subrule: [else]<<  |
  |          |(1 times)