Add ParserState method to get current utf16 position #374
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This adds a
utf16_position
method onParserState
, exposing acurrent_position
field that we compute.The implementation is closely following what what done to compute the utf16 column position.
Note that this is my first contribution here and that I'm not very familiar with Rust.
Motivation: I'm currently building a css tokenizer for Firefox DevTools based on cssparser, replacing an existing JS-based implementation (https://bugzilla.mozilla.org/show_bug.cgi?id=1410184) so we can 1. use the same code than the CSS engine and 2. be faster. Consumers of those tokens are expecting utf16 start and end position for each tokens so the original can easily be manipulated in JS.