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std::text_encoding:: comp-name

From cppreference.net
C++
Text processing library
std::text_encoding
static constexpr bool /*comp-name*/ ( std:: string_view a, std:: string_view b ) ;
(since C++26)
( exposition only* )

Compares two strings a and b encoded in ordinary literal encoding following the Unicode Charset Alias Matching rules.

Two strings are considered equal when comparing from left to right after:

  • removing all non-alphanumeric characters,
  • converting all letters to the same case, and
  • removing any standalone sequences of '0' characters that do not immediately follow a numeric prefix. A numeric prefix consists of a non-zero digit ( '1' through '9' ) optionally followed by one or more non-alphanumeric characters.

Here are the following examples: 

static_assert(/*comp-name*/("UTF-8", "utf8") == true);
static_assert(/*comp-name*/("u.t.f-008", "utf8") == true);
static_assert(/*comp-name*/("ISO-8859-1", "iso88591") == true);
static_assert(/*comp-name*/("ut8", "utf8") == false);
static_assert(/*comp-name*/("utf-80", "utf8") == false);

Parameters

a, b - strings to compare

Return value

true if two strings compare equal as described above; false otherwise.