Support for parsing multiple documents #369
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This adds `parseYAML` and `parseAllYAMLs` to the `yaml` package object. The first is the single document parsing provided by `.asNode`. The second parses a sequence of documents. To implement this, a fairly small addition was made to `Composer`: `multipleFromEvents`. Which uses `composeNode` to parse `Node`s from the events so long as there are `tail` events returned. This also exposes the `pos` method of `Node`. This is useful when writing custom decoders for nicer error messages.
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This adds
parseAllYAMLs(andparseYAML) to theyamlpackage object.parseAllYAMLseither fails or returns a list of all yaml documents (Node) contained in the string content.parseYAMLis an explicit form of the is the single document parsing provided by.asNode.To implement this, a fairly small addition was made to
Composer:multipleFromEvents. Which usescomposeNodeto parseNodes from the events so long as there aretailevents returned.This also exposes the
posmethod ofNode. This is useful when writing custom decoders for nicer error messages.This is a mix of style (exposing the explicit
parseYAMLmethods andpos) plus functionality. Let me know if you'd like me to separate this into multiple PRs.