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-rw-r--r--erts/doc/src/absform.xml42
1 files changed, 37 insertions, 5 deletions
diff --git a/erts/doc/src/absform.xml b/erts/doc/src/absform.xml
index e49c8c32e9..2ada903edb 100644
--- a/erts/doc/src/absform.xml
+++ b/erts/doc/src/absform.xml
@@ -4,7 +4,7 @@
<chapter>
<header>
<copyright>
- <year>2001</year><year>2017</year>
+ <year>2001</year><year>2018</year>
<holder>Ericsson AB. All Rights Reserved.</holder>
</copyright>
<legalnotice>
@@ -614,26 +614,58 @@
<item>
<p>If C is a catch clause <c>P -> B</c>,
where <c>P</c> is a pattern and <c>B</c> is a body, then
- Rep(C) = <c>{clause,LINE,[Rep({throw,P,_})],[],Rep(B)}</c>.</p>
+ Rep(C) = <c>{clause,LINE,[Rep({throw,P,_})],[],Rep(B)}</c>,
+ that is, a catch clause with an explicit exception class
+ <c>throw</c> and with or without an explicit stacktrace
+ variable <c>_</c> cannot be distinguished from a catch clause
+ without an explicit exception class and without an explicit
+ stacktrace variable.</p>
</item>
<item>
<p>If C is a catch clause <c>X : P -> B</c>,
where <c>X</c> is an atomic literal or a variable pattern,
<c>P</c> is a pattern, and <c>B</c> is a body, then
- Rep(C) = <c>{clause,LINE,[Rep({X,P,_})],[],Rep(B)}</c>.</p>
+ Rep(C) = <c>{clause,LINE,[Rep({X,P,_})],[],Rep(B)}</c>,
+ that is, a catch clause with an explicit exception class and
+ with an explicit stacktrace variable <c>_</c> cannot be
+ distinguished from a catch clause with an explicit exception
+ class and without an explicit stacktrace variable.</p>
+ </item>
+ <item>
+ <p>If C is a catch clause <c>X : P : S -> B</c>,
+ where <c>X</c> is an atomic literal or a variable pattern,
+ <c>P</c> is a pattern, <c>S</c> is a variable, and <c>B</c>
+ is a body, then
+ Rep(C) = <c>{clause,LINE,[Rep({X,P,S})],[],Rep(B)}</c>.</p>
</item>
<item>
<p>If C is a catch clause <c>P when Gs -> B</c>,
where <c>P</c> is a pattern, <c>Gs</c> is a guard sequence,
and <c>B</c> is a body, then
- Rep(C) = <c>{clause,LINE,[Rep({throw,P,_})],Rep(Gs),Rep(B)}</c>.</p>
+ Rep(C) = <c>{clause,LINE,[Rep({throw,P,_})],Rep(Gs),Rep(B)}</c>,
+ that is, a catch clause with an explicit exception class
+ <c>throw</c> and with or without an explicit stacktrace
+ variable <c>_</c> cannot be distinguished from a catch clause
+ without an explicit exception class and without an explicit
+ stacktrace variable.</p>
</item>
<item>
<p>If C is a catch clause <c>X : P when Gs -> B</c>,
where <c>X</c> is an atomic literal or a variable pattern,
<c>P</c> is a pattern, <c>Gs</c> is a guard sequence,
and <c>B</c> is a body, then
- Rep(C) = <c>{clause,LINE,[Rep({X,P,_})],Rep(Gs),Rep(B)}</c>.</p>
+ Rep(C) = <c>{clause,LINE,[Rep({X,P,_})],Rep(Gs),Rep(B)}</c>,
+ that is, a catch clause with an explicit exception class and
+ with an explicit stacktrace variable <c>_</c> cannot be
+ distinguished from a catch clause with an explicit exception
+ class and without an explicit stacktrace variable.</p>
+ </item>
+ <item>
+ <p>If C is a catch clause <c>X : P : S when Gs -> B</c>,
+ where <c>X</c> is an atomic literal or a variable pattern,
+ <c>P</c> is a pattern, <c>Gs</c> is a guard sequence,
+ <c>S</c> is a variable, and <c>B</c> is a body, then
+ Rep(C) = <c>{clause,LINE,[Rep({X,P,S})],Rep(Gs),Rep(B)}</c>.</p>
</item>
<item>
<p>If C is a function clause <c>( Ps ) -> B</c>,