Digraphs were supposed to be a easier-to-read alternative to trigraphs. Unfortunately, the extended list of digraphs with many additional logic operators by C++

Digraphs were supposed to be a easier-to-read alternative to trigraphs. Unfortunately, the extended list of digraphs with many additional logic operators by C++ never entered C, i.e. %:%: ## compl ~ not ! bitand & bitor | and && or || xor ^ and_eq &= or_eq |= xor_eq ^= not_eq != C only has basic ones (still more intuitive than trigraphs). <: [ :> ] <% { %> } %: # Last time, I had to type a C program on a touchscreen, and those symbols were extremely difficult to enter. I knew digraphs can help, but then realized that I couldn't use the digraphs for logic operators without programming C under C++.