Boo - Programming language

Boo is an open source programming language created in 2003 by Rodrigo B. De Oliveira.

#376on PLDB

21Years Old

232Repos

Homepage · REPL · Try It Online · Wikipedia · Docs

Boo is an object-oriented, statically typed, general-purpose programming language that seeks to make use of the Common Language Infrastructure's support for Unicode, internationalization, and web applications, while using a Python-inspired syntax and a special focus on language and compiler extensibility. Some features of note include type inference, generators, multimethods, optional duck typing, macros, true closures, currying, and first-class functions. Boo was one of the three scripting languages for the Unity game engine (Unity Technologies employed De Oliveira), until it was dropped in 2014 due to small userbase. Read more on Wikipedia...

Tags: programming language
There are at least 232 Boo repos on GitHub
Early development of Boo happened in The Boo Programming Language
The Google BigQuery Public Dataset GitHub snapshot shows 208 users using Boo in 241 repos on GitHub
There are 23 Project Euler users using Boo
Explore Boo snippets on Rosetta Code
Boo appears in the TIOBE Index
Pygments supports syntax highlighting for Boo
GitHub supports syntax highlighting for Boo
See also: (10 related languages) C#, Python, Genie, Vala, Unicode, Unity, Fantom, Groovy, Nemerle, REBOL

Example from Riju:

print "Hello, world!"

Example from hello-world:

print "Hello World"

Example from the Hello World Collection:

# Hello World in Boo
print "Hello World"

Example from Wikipedia:

def fib():
    a, b = 0L, 1L       # The 'L's make the numbers double word length (typically 64 bits)
    while true:
        yield b
        a, b = b, a + b

# Print the first 5 numbers in the series:
for index as int, element in zip(range(5), fib()):
    print("${index+1}: ${element}")

Language features

Feature	Supported	Example	Token
MultiLine Comments	✓
Integers	✓	# \d+
Floats	✓	# (\d+\.\d\|\d\.\d+)([fF][+-]?[0-9]+)?
Hexadecimals	✓	# 0x[a-fA-F0-9]+
Octals	✓	# 0\d+
Strings	✓	"Hello world"	"
Print() Debugging	✓		print
Comments	✓	# A comment
Line Comments	✓	# A comment	#
Type Inference	✓
Semantic Indentation	✓