Regular Expressions 101

Explanation
Pro

IO::Memorythe literal text IO::Memory (case sensitive)

Group 1(O|I)

1st AlternativeO

Othe literal O (79₁₀ / 117₈ / 4F₁₆) (case sensitive)

2nd AlternativeI

Ithe literal I (73₁₀ / 111₈ / 49₁₆) (case sensitive)

Channelthe literal text Channel (case sensitive)

Group 2(|32)

1st Alternative — matches an empty string

2nd Alternative32

32the literal text 32

Group 3([\s]|::|&[\s])

1st Alternative[\s]

Character Class[\s]

\sany whitespace character

2nd Alternative::

::the literal text ::

3rd Alternative&[\s]

&the literal & (38₁₀ / 46₈ / 26₁₆)

Character Class[\s]

\sany whitespace character

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Ready to run

25 tokens

IO::Memory(O|I)Channel(|32)([\s]|::|&[\s])