1Based on the C grammar for arithmetic expressions 2================================================= 3 4number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9' 5 6number_exponent = 'e'|'E' 7 8basic_number = basic_number number_digit | number_digit
--- 53 unchanged lines hidden --- | 22Based on the C grammar for arithmetic expressions 23================================================= 24 25number_digit = '0'|'1'|'2'|'3'|'4'|'5'|'6'|'7'|'8'|'9' 26 27number_exponent = 'e'|'E' 28 29basic_number = basic_number number_digit | number_digit
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