Make the restart work correctly.#9
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fiddlerwoaroof wants to merge 2 commits into
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When the restart is active, it can be triggered via the (replace-invalid) function. For this to work, the parser that throws the error cannot be being run directly, but must be called by another parser. When the restart is triggered, it unwinds the parser stack one parser higher than the parser that signaled the condition and then fixes its input and reruns it.
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When the restart is active, it can be triggered via the (replace-invalid) function. For this to work, the parser that throws the error cannot be being run directly, but must be called by another parser. When the restart is triggered, it unwinds the parser stack one parser higher than the parser that signaled the condition and then fixes its input and reruns it.
This fixes a couple errors in the last pull request. However, there's a slight difficulty with the current pull-request: when #'run is called on a parser that raises an exception, invoking the restart will often lead to a loop because, once the replacement is made, it is fed back into the parser and tested again: if all a parser does is raise an exception, this will cause an infinite loop.