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Add handler functions for dealing with Writers and Trace interactively #44
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axman6
changed the title
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@xkollar looks perfect to me! |
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@axman6: thanks for having a look. I'll try harder to get it into a master :-). |
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One of the common uses for
Writeris to provide pure logging. Sometimes it is useful to be able to get these logging values as they occur during interpretation. I've added functions for interpretingWriterandTracein terms of another effect, such asIO, allowingWriterto be used for logging, using different logging levels and handle each level differently (a use case that has come up at work where we want to add tracing info but ignore it unless debugging).