* aspects.adb: Add an entry in table Canonical_Aspect for
Initial_Condition.
* aspects.ads: Add entries in tables Aspect_Id, Aspect_Argument,
Aspect_Names and Aspect_Delay for Initial_Condition.
* einfo.adb (Get_Pragma): Include pragma Initial_Condition to
categorization pragmas.
* einfo.ads (Get_Pragma): Update comment on usage.
* exp_ch7.adb (Expand_N_Package_Body): Add a runtime check to
verify the assertion introduced by pragma Initial_Condition.
(Expand_N_Package_Declaration): Add a runtime check to
verify the assertion introduced by pragma Initial_Condition.
(Expand_Pragma_Initial_Condition): New routine.
* par-prag: Include pragma Initial_Condition to the list of
pragmas that do not require special processing by the parser.
* sem_ch3.adb (Analyze_Declarations): Analyze pragma
Initial_Condition at the end of the visible declarations.
* sem_ch13.adb (Analyze_Aspect_Specifications): Add processing
for aspect Initial_Condition.
(Check_Aspect_At_Freeze_Point):
Aspect Initial_Condition does not need inspection at freezing.
* sem_prag.adb (Analyze_Initial_Condition_In_Decl_Part):
New routine.
(Analyze_Pragma): Update all calls
to Check_Declaration_Order. Add processing for pragma
Initial_Condition. Initial_Condition is now a valid assertion
kind. Add an entry in table Sig_Flags for Initial_Condition.
(Check_Declaration_Order): Reimplemented to handle arbitrary
pragmas.
(Is_Valid_Assertion_Kind): Add an entry for
Initial_Condition.
* sem_pag.ads (Analyze_Initial_Condition_In_Decl_Part):
New routine.
* sem_util.adb (Add_Contract_Item): Pragma Initial_Condition
can now be associated with a package spec.
* sem_util.ads (Add_Contract_Item): Update comment on usage.
* sinfo.ads: Update the documentation of node N_Contract
* snames.ads-tmpl: Add new predefined name Initial_Condition. Add
new pragma id for Initial_Condition.