std::text_encoding::comp-name
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C++
Text processing library
| Localization library | |||||||||||||||||||||||||
| Regular expressions library (C++11) | |||||||||||||||||||||||||
| Formatting library (C++20) | |||||||||||||||||||||||||
| Null-terminated sequence utilities | |||||||||||||||||||||||||
| Byte strings | |||||||||||||||||||||||||
| Multibyte strings | |||||||||||||||||||||||||
| Wide strings | |||||||||||||||||||||||||
| Primitive numeric conversions | |||||||||||||||||||||||||
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| Text encoding identifications | |||||||||||||||||||||||||
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std::text_encoding
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| Creation | ||||
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text_encoding::comp-name | ||||
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| static constexpr bool /*comp-name*/( std::string_view a, std::string_view b ); |
(since C++26) (exposition only*) |
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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);
[edit] Parameters
| a, b | - | strings to compare |
[edit] Return value
true if two strings compare equal as described above; false otherwise.
