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#include <Rinternals.h>
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#include <Rinternals.h>
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/**
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/**
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  The signature of the C routine that a callback must implement.
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  The signature of the C routine that a callback must implement.
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  expr - the expression for the top-level task that was evaluated.
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  expr - the expression for the top-level task that was evaluated.
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  value - the result of the top-level task, i.e. evaluating expr.
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  value - the result of the top-level task, i.e. evaluating expr.
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  succeeded - a logical value indicating whether the task completed propertly.
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  succeeded - a logical value indicating whether the task completed properly.
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  visible - a logical value indicating whether the result was printed to the R ``console''/stdout.
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  visible - a logical value indicating whether the result was printed to the R ``console''/stdout.
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  data - user-level data passed to the registration routine.
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  data - user-level data passed to the registration routine.
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 */
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 */
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typedef Rboolean (*R_ToplevelCallback)(SEXP expr, SEXP value, Rboolean succeeded, Rboolean visible, void *);
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typedef Rboolean (*R_ToplevelCallback)(SEXP expr, SEXP value, Rboolean succeeded, Rboolean visible, void *);
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