Document maps-related abstract syntax trees

	{map,Loc,Fields}
	{map,Loc,Argument,Fields}

	{map_field_assoc,Loc,Name,Value}
	{map_field_exact,Loc,Name,Value}

1 files changed, 23 insertions, 0 deletions

diff --git a/erts/doc/src/absform.xml b/erts/doc/src/absform.xml
index 4acc03b133..835a4fc692 100644
--- a/erts/doc/src/absform.xml
+++ b/erts/doc/src/absform.xml
@@ -217,6 +217,14 @@
        Rep(E) = <c><![CDATA[{record_index,LINE,Name,Rep(Field)}]]></c>.</item>
       <item>If E is <c><![CDATA[E_0#Name.Field]]></c>, then
        Rep(E) = <c><![CDATA[{record_field,LINE,Rep(E_0),Name,Rep(Field)}]]></c>.</item>
+      <item>If E is <c><![CDATA[#{W_1, ..., W_k}]]></c> where each
+       <c><![CDATA[W_i]]></c> is a map assoc or exact field, then Rep(E) =
+       <c><![CDATA[{map,LINE,[Rep(W_1), ..., Rep(W_k)]}]]></c>. For Rep(W), see
+       below.</item>
+      <item>If E is <c><![CDATA[E_0#{W_1, ..., W_k}]]></c> where
+       <c><![CDATA[W_i]]></c> is a map assoc or exact field, then Rep(E) =
+       <c><![CDATA[{map,LINE,Rep(E_0),[Rep(W_1), ..., Rep(W_k)]}]]></c>. For
+       Rep(W), see below.</item>
       <item>If E is <c><![CDATA[catch E_0]]></c>, then
        Rep(E) = <c><![CDATA[{'catch',LINE,Rep(E_0)}]]></c>.</item>
       <item>If E is <c><![CDATA[E_0(E_1, ..., E_k)]]></c>, then
@@ -334,6 +342,21 @@
          is an integer, Rep(TS) = <c><![CDATA[{A, Value}]]></c>.</item>
       </list>
     </section>
+
+    <section>
+      <title>Map assoc and exact fields</title>
+      <p>When W is an assoc or exact field (in the body of a map), then:</p>
+      <list type="bulleted">
+        <item>If W is an assoc field <c><![CDATA[K => V]]></c>, where
+         <c><![CDATA[K]]></c> and <c><![CDATA[V]]></c> are both expressions,
+         then Rep(W) = <c><![CDATA[{map_field_assoc,LINE,Rep(K),Rep(V)}]]></c>.
+         </item>
+        <item>If W is an exact field <c><![CDATA[K := V]]></c>, where
+         <c><![CDATA[K]]></c> and <c><![CDATA[V]]></c> are both expressions,
+         then Rep(W) = <c><![CDATA[{map_field_exact,LINE,Rep(K),Rep(V)}]]></c>.
+         </item>
+      </list>
+    </section>
   </section>
 
   <section>