Optional installation

• Add cmake option BERTRAND_INSTALL_LIBRARY to set if bertrand is installed. Default is ON unless bertrand is included using add_subfolder

Streamlining build process

• Moving to clang9 for CI, because clang 6.0 is no longer available
• Removing steps to deploy to bintray, because it has been shut down
• Streamlining CMakeLists.txt a tiny bit

Full Changelog: 0.0.15...0.0.16

Inline all the functions (and put them into namespaces)

• Fix bug caused by non-inlining header-only function
• refactored all bertrand-related functions into namespace bertrand

Stacktrace for failed contracts

• bertrand prints stacktrace on a failed contract (for gcc and clang)
• Rename branch master to main

Helper function to compare multiple values

• Add function to search for a value in a list of values that are known at compile time
• Update Catch2 to version 2.13.1
• Update documentation with hint about ConanCenter

Contract type "Require", "Ensure" or "Invariant" is included in message

• Contract type "Require", "Ensure" or "Invariant" is included in message
• conanfile.py pulls version out of CMakeLists
• Linting conanfile.py, cmake object is only generated once

Building from within conan

If bertrand is built from within conan the conanbuildinfo provided by conan will be used instead of getting it from github

Conan based dependency management

• Including bertrand as a subdirectory in cmake disables building the tests
• Catch2 is retrieved with conan and no longer directly in the source tree

Contracts take variable number of arguments as message

An example is better than a lengthy explanation:

Require(false, "Something is not right: ", someVariable, " and ", anotherVariable)

Lightweight usage as a sub-project

• Add cmake option BERTRAND_BUILD_TESTING (default ON) to disable bertrand tests if used with add_subdirectory