%% -*- coding: utf-8 -*- This of course requires your editor to support UTF-8 as well. The same comment is also interpreted by functions like, the release handler, and so on, so that you can have all text files in your source directories in UTF-8 encoding. The language Having the source code in UTF-8 also allows you to write string literals, function names, and atoms containing Unicode characters with code points >255. Module names, application names, and node names are still restricted to the ISO Latin-1 range. Binary literals, where you use type /utf8, can also be expressed using Unicode characters >255. Having module names or application names using characters other than 7-bit ASCII can cause trouble on operating systems with inconsistent file naming schemes, and can hurt portability, so it is not recommended.
Comart Xecap Drivers. EEP 40 suggests that the language is also to allow for Unicode characters >255 in variable names. Whether to implement that EEP is yet to be decided.
In Erlang, strings are lists of integers. A string was until Erlang/OTP R13 defined to be encoded in the ISO Latin-1 (ISO 8859-1) character set, which is, code point by code point, a subrange of the Unicode character set. The standard list encoding for strings was therefore easily extended to handle the whole Unicode range.
A Unicode string in Erlang is a list containing integers, where each integer is a valid Unicode code point and represents one character in the Unicode character set. Erlang strings in ISO Latin-1 are a subset of Unicode strings. Only if a string contains code points 255, an encoding must be decided upon and the string is to be converted to a binary in the preferred encoding using. Strings are not generally lists of bytes, as they were before Erlang/OTP R13, they are lists of characters. Characters are not generally bytes, they are Unicode code points. Game Kamen Rider Super Climax Heroes Wizard Psp here.
Binaries are more troublesome. For performance reasons, programs often store textual data in binaries instead of lists, mainly because they are more compact (one byte per character instead of two words per character, as is the case with lists). Using, an ISO Latin-1 Erlang string can be converted into a binary, effectively using bytewise encoding: one byte per character. This was convenient for those limited Erlang strings, but cannot be done for arbitrary Unicode lists. As the UTF-8 encoding is widely spread and provides some backward compatibility in the 7-bit ASCII range, it is selected as the standard encoding for Unicode characters in binaries for Erlang. The standard binary encoding is used whenever a library function in Erlang is to handle Unicode data in binaries, but is of course not enforced when communicating externally.
Functions and bit syntax exist to encode and decode both UTF-8, UTF-16, and UTF-32 in binaries. However, library functions dealing with binaries and Unicode in general only deal with the default encoding. Character data can be combined from many sources, sometimes available in a mix of strings and binaries. Erlang has for long had the concept of iodata or iolists, where binaries and lists can be combined to represent a sequence of bytes. In the same way, the Unicode-aware modules often allow for combinations of binaries and lists, where the binaries have characters encoded in UTF-8 and the lists contain such binaries or numbers representing Unicode code points. External_unicode_binary() = binary() with characters coded in a user-specified Unicode encoding other than UTF-8 (UTF-16 or UTF-32) external_chardata() = external_charlist() external_unicode_binary() external_charlist() = maybe_improper_list(char() external_unicode_binary() external_charlist(), external_unicode_binary() nil()) As from Erlang/OTP R16, Erlang source files can be written in UTF-8 or bytewise ( latin1) encoding.
