Cobra

Cobra is an object-oriented programming language produced by Cobra Language LLC.^[1] Cobra is designed by Chuck Esterbrook, and runs on the Microsoft .NET and Mono frameworks.^[2] It is strongly influenced by Python, C#, Eiffel, Objective-C and other programming languages.^[3] It supports both static and dynamic typing.^[4][5] It has first class support for unit tests and contracts.^[4] Cobra provides both rapid development and performance in the same language.^[6]

Cobra is an open-source project. It was released under the MIT open source license on February 29, 2008.^[7]

A monthly update is posted to the Cobra news forum with progress on features, fixes, documentation and related projects since the last update.^[8]

Features

• Object-oriented:
  • Namespaces
  • Classes, interfaces, structs, extensions, enumerations
  • Methods, properties, indexers
  • Mixins, extension methods
  • Generics, attributes
• Quality control:
  • Contracts, assertions
  • Unit tests, docstrings
  • Compile-time nil-tracking
• Expressiveness:
  • Static and dynamic binding
  • List, dictionary, and set literals
  • in and implies operator
  • for expressions
  • Slicing
  • Interpolated strings
  • Compile-time type inference
  • Lambdas and closures
• General productivity:
  • Exception handling
  • Postmortem exception report
  • Garbage collection
• Scripting conveniences:
  • Clean syntax
  • Dynamic binding
  • One-step run
  • Shebang line (#!)
• Miscellaneous:
  • Doc tool (cobra -doc)
  • Syntax highlighting tool (cobra -highlight)

Examples

The following examples can be entered into a file and run using cobra <filename>.

Classic Hello world example:

class Hello
    def main
        print 'Hello, World'

Simple class:

class Person
 
    var _name as String
    var _age as int
 
    cue init(name as String, age as int)
        _name, _age = name, age
 
    def toString as String is override
        return 'My name is [_name] and I am [_age] years old'

References

External links

• The Cobra Programming Language home page
• The Cobra blog by Chuck Esterbrook
• Cobra News Index

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