src/Pure/System/command_line.ML
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Thu, 06 Jun 2024 22:03:20 +0200
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(*  Title:      Pure/System/command_line.ML
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    Author:     Makarius
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Support for Isabelle/ML command line tools.
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*)
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signature COMMAND_LINE =
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sig
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  val tool: (unit -> unit) -> unit
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end;
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structure Command_Line: COMMAND_LINE =
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struct
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fun tool main =
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  Thread_Attributes.uninterruptible_body (fn run =>
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    let
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      fun print_failure exn = (Runtime.exn_error_message exn; Exn.failure_rc exn);
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      val rc =
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        (case Exn.capture_body (run main) of
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          Exn.Res () => 0
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        | Exn.Exn exn =>
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            (case Exn.capture print_failure exn of
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              Exn.Res rc => rc
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            | Exn.Exn crash => Exn.failure_rc crash));
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    in exit rc end);
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end;