Interpreter #27
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Interpreter #27
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* Constructor `Unit` of type `Ast.raw_exp` is modified so that it remembers what variable is discarded. (The interpreter needs the variable name to get the final result of a program.)
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This PR adds a new option (execution mode)
-exec interpto run the interpreter.Most syntactic forms are supported. When a non-deterministic choice
_or( _ : ~ ...)is evaluated, you are prompted to input an integer (or feed through stdin).