From 6be3e658d9999274d5c0c702bf799b90a110c745 Mon Sep 17 00:00:00 2001 From: Hans Bolinder Date: Mon, 17 Mar 2014 12:05:18 +0100 Subject: Clarify the reference manual regarding source file encoding --- system/doc/reference_manual/character_set.xml | 132 ++++++++++++++++++++++++++ system/doc/reference_manual/introduction.xml | 85 +---------------- system/doc/reference_manual/part.xml | 3 +- 3 files changed, 135 insertions(+), 85 deletions(-) create mode 100644 system/doc/reference_manual/character_set.xml (limited to 'system') diff --git a/system/doc/reference_manual/character_set.xml b/system/doc/reference_manual/character_set.xml new file mode 100644 index 0000000000..884898eb34 --- /dev/null +++ b/system/doc/reference_manual/character_set.xml @@ -0,0 +1,132 @@ + + + + +
+ + 20142014 + Ericsson AB. All Rights Reserved. + + + The contents of this file are subject to the Erlang Public License, + Version 1.1, (the "License"); you may not use this file except in + compliance with the License. You should have received a copy of the + Erlang Public License along with this software. If not, it can be + retrieved online at http://www.erlang.org/. + + Software distributed under the License is distributed on an "AS IS" + basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See + the License for the specific language governing rights and limitations + under the License. + + + + Character Set and Source File Encoding + + + + + character_set.xml +
+ +
+ Character Set +

In Erlang 4.8/OTP R5A the syntax of Erlang tokens was extended to + allow the use of the full ISO-8859-1 (Latin-1) character set. This + is noticeable in the following ways:

+ + +

All the Latin-1 printable characters can be used and are + shown without the escape backslash convention.

+ + +

Atoms and variables can use all Latin-1 letters.

+ + + + + Octal + Decimal +   + Class + + + 200 - 237 + 128 - 159 +   + Control characters + + + 240 - 277 + 160 - 191 + - ¿ + Punctuation characters + + + 300 - 326 + 192 - 214 + À - Ö + Uppercase letters + + + 327 + 215 + × + Punctuation character + + + 330 - 336 + 216 - 222 + Ø - Þ + Uppercase letters + + + 337 - 366 + 223 - 246 + ß - ö + Lowercase letters + + + 367 + 247 + ÷ + Punctuation character + + + 370 - 377 + 248 - 255 + ø - ÿ + Lowercase letters + + Character Classes. +
+

In Erlang/OTP R16B the syntax of Erlang tokens was extended to + handle Unicode. To begin with the support is limited to + strings, but Erlang/OTP 18 is expected to handle Unicode atoms + as well. More about the usage of Unicode in Erlang source files + can be found in STDLIB's User's + Guide.

+
+
+ Source File Encoding +

The Erlang source file encoding is selected by a + comment in one of the first two lines of the source file. The + first string that matches the regular expression + coding\s*[:=]\s*([-a-zA-Z0-9])+ selects the encoding. If + the matching string is not a valid encoding it is ignored. The + valid encodings are Latin-1 and UTF-8 where the + case of the characters can be chosen freely.

+

The following example selects UTF-8 as default encoding:

+ 
+%% coding: utf-8
+

Two more examples, both selecting Latin-1 as default encoding:

+ 
+%% For this file we have chosen encoding = Latin-1
+ 
+%% -*- coding: latin-1 -*-
+

The default encoding for Erlang source files was changed from + Latin-1 to UTF-8 in Erlang OTP 17.0.

+
+ diff --git a/system/doc/reference_manual/introduction.xml b/system/doc/reference_manual/introduction.xml index aa42967625..36bec17825 100644 --- a/system/doc/reference_manual/introduction.xml +++ b/system/doc/reference_manual/introduction.xml @@ -4,7 +4,7 @@
- 20032013 + 20032014 Ericsson AB. All Rights Reserved. @@ -79,88 +79,5 @@ when xor

-
- Character Set -

In Erlang 4.8/OTP R5A the syntax of Erlang tokens was extended to - allow the use of the full ISO-8859-1 (Latin-1) character set. This - is noticeable in the following ways:

- - -

All the Latin-1 printable characters can be used and are - shown without the escape backslash convention.

- - -

Atoms and variables can use all Latin-1 letters.

- - - - - Octal - Decimal -   - Class - - - 200 - 237 - 128 - 159 -   - Control characters - - - 240 - 277 - 160 - 191 - - ¿ - Punctuation characters - - - 300 - 326 - 192 - 214 - À - Ö - Uppercase letters - - - 327 - 215 - × - Punctuation character - - - 330 - 336 - 216 - 222 - Ø - Þ - Uppercase letters - - - 337 - 366 - 223 - 246 - ß - ö - Lowercase letters - - - 367 - 247 - ÷ - Punctuation character - - - 370 - 377 - 248 - 255 - ø - ÿ - Lowercase letters - - Character Classes. -
-

In Erlang/OTP R16 the syntax of Erlang tokens was extended to - handle Unicode. To begin with the support is limited to strings, - but Erlang/OTP R18 is expected to handle Unicode atoms as well. - More about the usage of Unicode in Erlang source files can be - found in STDLIB's User'S - Guide. The default encoding for Erlang source files - is still Latin-1, but in Erlang/OTP R17 the default encoding - will be UTF-8. The details on how to state the encoding of an - Erlang source file can be found in epp(3).

-
diff --git a/system/doc/reference_manual/part.xml b/system/doc/reference_manual/part.xml index b4f114c268..ee8f3dd7eb 100644 --- a/system/doc/reference_manual/part.xml +++ b/system/doc/reference_manual/part.xml @@ -4,7 +4,7 @@
- 20032013 + 20032014 Ericsson AB. All Rights Reserved. @@ -28,6 +28,7 @@
+ -- cgit v1.2.3