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> I want to support some custom syntax like the following in a Lua console I have implemented:
> !ls -lrt
> or
> @name{....}
> The exclamation mark and "@" are not valid Lua syntax so currently I detect them in the typed string and replace with valid Lua code - macro pre-processing.
> But is there a way to make it valid given the flexibility of Lua to make DSLs.

Experiment with ltokenp. See