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authorBjörn Gustavsson <[email protected]>2011-03-03 13:02:50 +0100
committerBjörn Gustavsson <[email protected]>2011-08-18 10:00:29 +0200
commit8799bbf2c0f644008828fb1000b72fafb3fa58ec (patch)
tree1550742e2888eb3d7208a5fea8957f5e52eab160 /erts/doc
parent66144dba0c398c4fd2e21581b7264e861e872701 (diff)
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Update documentation for erlang:raise/3 and erlang:get_stacktrace/0
Diffstat (limited to 'erts/doc')
-rw-r--r--erts/doc/src/erlang.xml35
1 files changed, 29 insertions, 6 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index b59fda7ef7..9b560f04c9 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -1282,17 +1282,18 @@ b</pre>
</desc>
</func>
<func>
- <name>erlang:get_stacktrace() -> [{Module, Function, Arity | Args}]</name>
+ <name>erlang:get_stacktrace() -> [{Module, Function, Arity | Args, Location}]</name>
<fsummary>Get the call stack back-trace of the last exception</fsummary>
<type>
<v>Module = Function = atom()</v>
<v>Arity = arity()</v>
<v>Args = [term()]</v>
+ <v>Location = [{atom(),term()}]</v>
</type>
<desc>
<p>Get the call stack back-trace (<em>stacktrace</em>) of the last
exception in the calling process as a list of
- <c>{Module,Function,Arity}</c> tuples.
+ <c>{Module,Function,Arity,Location}</c> tuples.
The <c>Arity</c> field in the first tuple may be the argument
list of that function call instead of an arity integer,
depending on the exception.</p>
@@ -1302,6 +1303,25 @@ b</pre>
<p>The stacktrace is the same data as the <c>catch</c> operator
returns, for example:</p>
<p><c>{'EXIT',{badarg,Stacktrace}} = catch abs(x)</c></p>
+ <p><c>Location</c> is a (possibly empty) list of two-tuples that
+ may indicate the location in the source code of the function.
+ The first element is an atom that describes the type of
+ information in the second element. Currently the following
+ items may occur:</p>
+ <taglist>
+ <tag><c>file</c></tag>
+ <item>
+ <p>The second element of the tuple is a string (list of
+ characters) representing the filename of the source file
+ of the function.</p>
+ </item>
+ <tag><c>line</c></tag>
+ <item>
+ <p>The second element of the tuple is the line number
+ (an integer greater than zero) in the source file
+ where the exception occurred or the function was called.</p>
+ </item>
+ </taglist>
<p>See also
<seealso marker="#error/1">erlang:error/1</seealso> and
<seealso marker="#error/2">erlang:error/2</seealso>.</p>
@@ -4095,11 +4115,14 @@ os_prompt%</pre>
equivalent to <c>erlang:Class(Reason)</c>.
<c>Reason</c> is any term and <c>Stacktrace</c> is a list as
returned from <c>get_stacktrace()</c>, that is a list of
- 3-tuples <c>{Module, Function, Arity | Args}</c> where
- <c>Module</c> and <c>Function</c> are atoms and the third
- element is an integer arity or an argument list. The
- stacktrace may also contain <c>{Fun, Args}</c> tuples where
+ 4-tuples <c>{Module, Function, Arity | Args,
+ Location}</c> where <c>Module</c> and <c>Function</c>
+ are atoms and the third element is an integer arity or an
+ argument list. The stacktrace may also contain <c>{Fun,
+ Args, Location}</c> tuples where
<c>Fun</c> is a local fun and <c>Args</c> is an argument list.</p>
+ <p>The <c>Location</c> element at the end is optional.
+ Omitting it is equivalent to specifying an empty list.</p>
<p>The stacktrace is used as the exception stacktrace for the
calling process; it will be truncated to the current
maximum stacktrace depth.</p>