BlueSpace is the name of an interpreter for the Whitespace programming language.

Whitespace is an esoteric programming language that was created by Edwin Brady and Chris Morris and is based at http://compsoc.dur.ac.uk/whitespace/. Its syntax consists entirely of characters that are usually invisible when displayed by a computer: space, horizontal tab and line feed.

This interpreter is written in Python 3 and boasts the following features:

• Interpret Whitespace code
• Compile Whitespace code to Python and optionally execute it
  • Optimise the generated Python code
• Accept and translate between Whitespace syntax, as well as:
  • A printable syntax, which substitutes space, tab and linefeed with s, t and n, respectively
  • An assembly-style syntax (described below)

To run a Whitespace program, simply execute ./bspace.py source.ws; to see other options, use ./bspace.py --help.

Each line of the source must match one of the following forms, where number is any decimal integer and label is any string of s and t characters with an optional trailing n. Each line maps to a single Whitespace instruction. A # begins a comment; it and any subsequent characters on the same line are ignored.

Push number
Duplicate
Copy number
Swap
Discard
Slide number

Add
Subtract
Multiply
Divide
Modulo

Store
Retrieve

Label label
Call label
Jump label
JumpZero label
JumpNegative label
Return
End

OutputChar
OutputNum
ReadChar
ReadNum

I have another page about Whitespace and BlueSpace which includes some of my own Whitespace programs at http://cpjsmith.co.uk/whitespace