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instance method

Ruby::Prism::ASCIISource#code_units_offset

code_units_offset(byte_offset, encoding)

Returns the offset from the start of the file for the given byte offset counting in code units for the given encoding.

This method is tested with UTF-8, UTF-16, and UTF-32. If there is the concept of code units that differs from the number of characters in other encodings, it is not captured here.

: (Integer byte_offset, Encoding encoding) -> Integer