naxp 0.1.0

Initial CRAN release. It wraps the naxp C++ library 0.15.0.

• naxp_parse() parses a naxp’s pattern, raising a naxp_error with the error’s code, message, offset and length where the pattern is invalid.
• naxp_standard() and naxp_standards() return the standard naxps built into every naxp library.
• naxp_encode() and naxp_decode() convert between text and encoded values. Invalid text encodes to 0, never NA.
• naxp_accepts() and naxp_canonical_form() check text without encoding it.
• naxp_encoded vectors
  • retain their naxp as an attribute,
  • print as decoded text, with 0 shown as <invalid (0)>,
  • support == and !=, subsetting, c(), rep(), unique(), sort() and match(), and
  • can be used as columns in a data frame or tibble.
• naxp_encoded() creates a naxp_encoded vector from a numeric vector and a naxp.
• naxp_pattern(), naxp_max_encoded_value() and naxp_max_length() report a naxp’s properties.
• Every function that takes a naxp parameter can instead take in its place
  • a naxp pattern string, parsed as a naxp, or
  • a naxp_encoded vector, whose naxp is used.
• naxp_compare() and naxp_first_divergent_value() compare two naxps.
• naxp_emit() generates source code for a naxp in any of the languages C, C++, C# or JavaScript.