Highlight output parts of C++ compilers (gcc, clang and msvc).
$ g++ test.cpp -fdiagnostics-color=always |& cpp-compiler-pretty-output.lua
An external command like clang-format can be configured to format very large expressions.
$ g++ test.cpp -fdiagnostics-color=always |& ./cpp-compiler-pretty-output.lua -c $COLUMNS 'clang-format | ./cpp-compiler-pretty-output.lua -E'
More options with -h/--help parameter.
luarocks install --local https://raw.githubusercontent.com/jonathanpoelen/cpp-compiler-pretty-output/master/cpp-compiler-pretty-output-1.1-1.rockspec
# or in your local directory
luarocks make --local cpp-compiler-pretty-output-1.1-1.rockspec