Numeric collation support (kn=true / numeric=true).
When enabled, sequences of decimal digits are treated as numeric values for primary sorting, ensuring "file2" sorts before "file10".
The numeric value is encoded as a length-prefixed big-endian number in the primary weight.
Summary
Functions
Encode a sequence of digit codepoints as numeric collation elements.
Process codepoint/element pairs, replacing digit sequence CEs with numeric-value-based CEs.
Functions
Encode a sequence of digit codepoints as numeric collation elements.
Follows ICU's approach: converts digits to numeric values, strips leading zeros, then encodes as a length prefix CE followed by one CE per digit.
Arguments
codepoints- a list of integer codepoints representing decimal digits.
Returns
A list of %Cldr.Collation.Element{} structs: one length-prefix CE followed by
one CE per significant digit.
Examples
iex> result = Cldr.Collation.Numeric.encode_numeric_value([0x31, 0x30])
iex> length(result)
3@spec process_elements([{[non_neg_integer()], [Cldr.Collation.Element.t()]}]) :: [ Cldr.Collation.Element.t() ]
Process codepoint/element pairs, replacing digit sequence CEs with numeric-value-based CEs.
Groups consecutive decimal digit codepoints into runs and replaces their
collation elements with length-prefixed numeric encodings so that "2"
sorts before "10".
Arguments
ce_pairs- a list of{codepoints, [%Cldr.Collation.Element{}]}pairs.
Returns
A flat list of %Cldr.Collation.Element{} structs with digit sequences replaced
by numeric collation elements.
Examples
iex> pairs = [{[0x31], [{0x21E7, 0x0020, 0x0002, false}]}, {[0x30], [{0x21E6, 0x0020, 0x0002, false}]}]
iex> result = Cldr.Collation.Numeric.process_elements(pairs)
iex> length(result)
3