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A Language for High-Level Programming with Self-Extension
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The Programming Language Amber

Amber is an open source scripting language, which is being developed for easy realization of High-Level Programming with Self-Extension. The term "self-extension" means a way to extend languages' syntaxes or semantics using capabilities of themselves, and it includes following techniques:

  • Macros
  • Domain Specific Languages (DSLs)
  • Extensible Syntax
  • Symbolic-Programming and Eval
  • Dynamic and Static Reflection

Writing programs with high-level abstraction is very important in terms of productivity, portability and performance. Since the optimal programming language is different according to programming targets in general, capabilities of self-extension are also important. Amber has been designed and developed placing the highest priority to self-extension from the start, so self-extension of Amber is easy and has high-degree of freedom.


Amber can be compiled only in Linux environment now.

% git clone
% cd amber
% make
% make install


Amber is published under the MIT License. See COPYING for the details of this license.



  • Developer: Koichi Nakamura
  • E-mail: koichi.nakamur at
  • Twitter: @9_ties
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