58 lines
1.1 KiB
OCaml
58 lines
1.1 KiB
OCaml
{
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open Be_parser
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}
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let address = ['0'-'9']+
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(* let ADD = "add"
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let SUB = "sub"
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let NEG = "neg"
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let EQ = "eq"
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let GT = "gt"
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let LT = "lt"
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let AND = "and"
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let OR = "or"
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let NOT = "not"
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let POP = "pop"
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let PUSH = "push" *)
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let command = "add"
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| "sub"
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| "neg"
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| "eq"
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| "gt"
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| "lt"
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| "and"
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| "or"
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| "not"
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| "pop"
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| "push"
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let segment = "argument"
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| "local"
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| "static"
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| "this"
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| "that"
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| "pointer"
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| "temp"
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| "constant"
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let white = [' ' '\t']+
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let comment = "//" _*
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(*
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let digit = ['0'-'9']
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let letter = ['a'-'z' 'A'-'Z']
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let special = ['.' '$' '_' '-' '+' '&' '!' '|']
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let id = (digit | letter | special)+
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*)
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rule read =
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parse
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| white { read lexbuf }
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| address as a { ADDRESS (a) }
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| command as c { COMMAND (c) }
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| segment as s { SEGMENT (s) }
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| comment as c { COMMENT (c) }
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| eof { EOF }
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