package lascar

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package lascar
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Simple (int) expressions for FSMs

type ident = string

The type of identifiers occuring in expressions

type value = int

The type of expression values

type t =
  1. | EConst of value
    (*

    Constants

    *)
  2. | EVar of ident
    (*

    Input, output or local variable

    *)
  3. | EBinop of string * t * t
    (*

    Binary operation ("+", "-", "*" or "/")

    *)

The type of expressions

type env = (ident * value option) list
exception Unknown of ident
exception Unbound of ident
exception Illegal_expr
val to_string : t -> string
val of_string : string -> t
val lookup : env -> ident -> value
val eval : env -> t -> value
val lexer : string -> Genlex.token Stream.t
val parse : Genlex.token Stream.t -> t
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