ConceptClang is an implementation of concepts for C++ in Clang -- an LLVM frontend for the C family of programing languages. Its aim is to provide an easily extensible infrastructure for implementing differing concepts proposals, particularly those that arose during discussion prior to its removal as a feature for C++0x. It is currently under development and the features undergo include:
  • Implicit and Explicit concepts
  • Concept refinement
  • Concept map templates
  • Constrained templates
  • Concept-based overloading
  • Concept ids as qualified names

Talks and Publications


The current prototype is available for download here:

To live on the edge, you can also checkout from the repository instead:

  • svn co clang --username conceptclang --password proto11

(Just make sure to use a compatible revision of LLVM.)

Once ConceptClang is installed, you can play around with the following test programs, available in a bulk download: Experiments.tar.gz

  • Basic Example: apple-to-apple
    • cd Experiments/AppleToApple/
    • LLVM_DIR/Debug+Asserts/bin/clang++ Test.cpp -o apple2apple
    • ./apple2apple
      Expected result:
      int (2) --> 2
      apple (5) --> 5
      orange (Valencia) --> Valencia
  • Practical Example: Mini-BGL
    • cd Experiments/MiniBGL/test
    • LLVM_DIR/Debug+Asserts/bin/clang++ -I../include/ Test.cpp -o minibgl
    • ./minibgl
      Expected result:
      0 0 1 4 2 3 5 6
  • … More examples coming up soon …


Please submit all bug reports or comments to Larisse, with "[ConceptClang-Bug]" in the subject line:
email: lvoufo at osl dot iu dot edu.