Course of Raku / Regexes and grammars / Grammars / Grammars, classes, and inheritance / Exercises

A number with proto

Problem

Write a grammar that parses a number, which may be either a decimal integer (one or more digits) or a hexadecimal literal (0x followed by hex digits 0–9, a–f). Use a proto token with two :sym<…> variants, dec and hex. Parse '0xff' and print whether it succeeded.

Example

The program prints:

True

Solution

✅ See the solution

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