# The Regular Expression Editor

The editor for a regular expression is essentially just a single text field. Operators in a regular expression are the Kleene star (*), the ``or'' operator (+), parentheses are also usable, and concatenation is accomplished by making symbols adjacent.

# In Haiku

To make expressions
for this program to work with,
type them in the field.

Adjacent symbols
imply concatenation.
No symbol is used.

Many or nothing,
Asterisk (*) is the Kleine star.
What precedes repeats.

Additionally,
if you want an "or" symbol
the plus (+) should be used.

Screaming nothingness,
exclamations (!) are special.
They act as lambda.

Formatting errors
will be reported to you
when you choose actions.