CVS difference for arm/source/03c.mss

Differences between 1.140 and version 1.141
Log of other versions for file arm/source/03c.mss

--- arm/source/03c.mss	2017/12/20 04:30:54	1.140
+++ arm/source/03c.mss	2018/09/05 05:22:36	1.141
@@ -1,9 +1,9 @@
 @Part(03, Root="ada.mss")
-@Comment{$Date: 2017/12/20 04:30:54 $}
+@Comment{$Date: 2018/09/05 05:22:36 $}
 @Comment{$Source: e:\\cvsroot/ARM/Source/03c.mss,v $}
-@Comment{$Revision: 1.140 $}
+@Comment{$Revision: 1.141 $}
 @LabeledClause{Tagged Types and Type Extensions}
@@ -4729,10 +4729,20 @@
+  @ChgRef{Version=[5],Kind=[RevisedAdded],ARef=[AI12-0278-1]}
   @ChgAdded{Version=[3],Text=[If the result is of an anonymous access type and
-  is the operand of an explicit conversion, the master is that of the target
-  type of the conversion;]}
+  is @Chg{Version=[5],New=[converted to a named access type],Old=[the operand
+  of an explicit conversion]}, the master is that of the target type of the
+  conversion;]}
+  @begin{Ramification}
+    @ChgRef{Version=[5],Kind=[Added],ARef=[AI12-0278-1]}
+    @ChgAdded{Version=[5],Text=[The conversion can be an explicit type
+    conversion, or an implicit subtype conversion (these happen when anonymous
+    access types are allowed to match named general access types, see
+    @RefSecNum{The Context of Overload Resolution}).]}
+  @end{Ramification}
   @ChgAdded{Version=[3],Text=[If the result is of an anonymous access type and
   defines an access discriminant, the master is the same as that for an object
@@ -5171,6 +5181,7 @@
 @ChgAdded{Version=[3],Text=[Inside a return statement that applies to a function
 @Chg{Version=[4],New=[or generic function ],Old=[]}@i<F>,
 @Chg{Version=[4],New=[or the return expression of an expression function
@@ -5180,7 +5191,8 @@
 @i<F>, the level of the return object is considered to be the same as that of
 the level of the explicitly aliased parameter; for statically comparing with the
 level of other entities, an explicitly aliased parameter of @i<F> is considered to
-have the accessibility level of the body of @i<F>.]}
+have the accessibility level of @Chg{Version=[5],New=[a parameter of @i<F>
+that is not explicitly aliased],Old=[the body of @i<F>]}.]}
@@ -6216,6 +6228,17 @@
   access-to-object parameter.]}
+  @ChgRef{Version=[5],Kind=[AddedNormal],ARef=[AI12-0278-1]}
+  @ChgAdded{Version=[5],Text=[@Defn{inconsistencies with Ada 2012}@b<Correction:>
+  Defined that the accessibility of a function that returns an anonymous
+  access type is the same for implicit and explicit conversions to a named
+  access type. This could cause code that is legal and does not raise an
+  exception in original Ada 2012 to become illegal or raise
+  Program_Error because of an accessibility failure in Ada 2020. This is more
+  likely to prevent a dangling pointer bug than to prevent something useful.]}
   @ChgAdded{Version=[4],Text=[@Defn{incompatibilities with Ada 2012}@b<Corrigendum:>
@@ -6269,6 +6292,10 @@
   @ChgAdded{Version=[5],Text=[Added Nonblocking (see
   @RefSecNum{Intertask Communication}) matching to P'Access.]}
+  @ChgRef{Version=[5],Kind=[AddedNormal],ARef=[AI12-0277-1]}
+  @ChgAdded{Version=[5],Text=[@b<Correction:> Clarified the static level of
+  explicitly aliased parameters.]}

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