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-rw-r--r--lib/stdlib/doc/src/io.xml18
1 files changed, 16 insertions, 2 deletions
diff --git a/lib/stdlib/doc/src/io.xml b/lib/stdlib/doc/src/io.xml
index 9f59fda6b5..63f814ad2e 100644
--- a/lib/stdlib/doc/src/io.xml
+++ b/lib/stdlib/doc/src/io.xml
@@ -494,8 +494,9 @@ ok
<c>~w</c>, but breaks terms whose printed representation
is longer than one line into many lines and indents each
line sensibly. It also tries to detect lists of
- printable characters and to output these as strings.
- For example:</p>
+ printable characters and to output these as strings. The
+ Unicode translation modifier is used for determining
+ what characters are printable. For example:</p>
<pre>
1> <input>T = [{attributes,[[{id,age,1.50000},{mode,explicit},</input>
<input>{typename,"INTEGER"}], [{id,cho},{mode,explicit},{typename,'Cho'}]]},</input>
@@ -546,6 +547,19 @@ ok
[{a,[97]},
{b,[98]}]
ok</pre>
+ <p>Binaries that look like UTF-8 encoded strings will be
+ output with the string syntax if the Unicode translation
+ modifier is given:</p>
+ <pre>
+9> <input>io:fwrite("~p~n",[[1024]]).</input>
+[1024]
+10> <input>io:fwrite("~tp~n",[[1024]]).</input>
+"\x{400}"
+11> <input>io:fwrite("~tp~n", [&lt;&lt;128,128&gt;&gt;]).</input>
+&lt;&lt;128,128&gt;&gt;
+12> <input>io:fwrite("~tp~n", [&lt;&lt;208,128&gt;&gt;]).</input>
+&lt;&lt;"\x{400}"/utf8&gt;&gt;
+ok</pre>
</item>
<tag><c>W</c></tag>
<item>