Course of Raku / Regexes and grammars / Grammars / Action classes / Exercises

One grammar, two actions

Problem

One grammar can be paired with different action classes to produce different results. Write a single grammar that parses two numbers separated by a comma, as in '10,20'. Write two action classes: one whose TOP makes their sum, another whose TOP makes their difference (first minus second). Parse '10,20' with each action class in turn and print both results.

Example

The program prints:

30
-10

Solution

✅ See the solution

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