WARNING_outstream : TextIO.outstream ref

SYNOPSIS

Controlling output stream used when printing HOL_WARNING

DESCRIBE

The value of reference cell WARNING_outstream controls where HOL_WARNING prints its argument.

The default value of WARNING_outstream is TextIO.stdOut.

EXAMPLE

    - val ostrm = TextIO.openOut "foo";
    > val ostrm = <outstream> : outstream

    - WARNING_outstream := ostrm;
    > val it = () : unit

    - HOL_WARNING "Module" "Function" "Sufferin' Succotash!";
    > val it = () : unit

    - TextIO.closeOut ostrm;
    > val it = () : unit

    - val istrm = TextIO.openIn "foo";
    > val istrm = <instream> : instream

    - print (TextIO.inputAll istrm);
    <<HOL warning: Module.Function: Sufferin' Succotash.>>

SEEALSO  Feedback,   HOL_WARNING,   ERR_outstream,   MESG_outstream,   emit_WARNING