* exp_ch3.adb (Build_Master): Rewritten.
(Expand_N_Full_Type_Declaration): Reformat the declarative
region. Update the call to Build_Master_Renaming.
(Expand_Previous_Access_Type): Rewritten.
* exp_ch6.adb (Add_Task_Actuals_To_Build_In_Place_Call):
Add local constant Result_Subt and update related usage.
(Expand_N_Extended_Return_Statement): Add local constant
Result_Subt and update related usage.
* exp_ch9.adb (Build_Activation_Chain): Rewritten to use the
new context detection mechanism.
(Build_Class_Wide_Master):
Use Insert_Action to add the renaming into the tree.
(Build_Master_Entity): Rewritten to use the new context detection
mechanism.
(Build_Master_Renaming): Add formal parameter Ins_Nod
and related usage. Use Insert_Action to add the renaming into the
tree.
(Find_Enclosing_Context): New subsidiary routine. Rather
than relying on enclosing scopes, this routine looks at the
tree structure to figure out the proper context for a _master
or a _chain. This approach eliminates the issues with transient
scopes which have not been converted into blocks.
* exp_ch9.ads (Build_Master_Entity): Change parameter profile
to better reflect the new usage. Update the related comment.
(Build_Master_Renaming): Add formal parameter Ins_Nod. Update
the comment on usage.
* sem_ch3.adb (Access_Definition): Update the calls to
Build_Master_Entity and Build_Master_Renaming.
* sem_ch6.adb (Create_Extra_Formals): Add local variable
Full_Subt. Code reformatting.
* sem_util.adb (Is_Iterator): Alphabetized.
(Is_LHS): Alphabetized.
(Is_Limited_Class_Wide_Type): New routine.
* sem_util.ads (Is_Limited_Class_Wide_Type): New routine.