diff options
Diffstat (limited to 'gcc/ada/aspects.ads')
| -rwxr-xr-x | gcc/ada/aspects.ads | 75 |
1 files changed, 54 insertions, 21 deletions
diff --git a/gcc/ada/aspects.ads b/gcc/ada/aspects.ads index ac9e231de57..b8ee3888a20 100755 --- a/gcc/ada/aspects.ads +++ b/gcc/ada/aspects.ads @@ -29,25 +29,27 @@ -- -- ------------------------------------------------------------------------------ --- This package defines the aspects that are recognized in aspect --- specifications. We separate this off in its own packages to that --- it can be accessed by the parser without dragging in Sem_Asp +-- This package defines the aspects that are recognized by GNAT in aspect +-- specifications. It also contains the subprograms for storing/retrieving +-- aspect speciciations from the tree. The semantic processing for aspect +-- specifications is found in Sem_Ch13.Analyze_Aspect_Specifications. with Namet; use Namet; +with Types; use Types; package Aspects is + -- Type defining recognized aspects + type Aspect_Id is (No_Aspect, -- Dummy entry for no aspect Aspect_Ada_2005, -- GNAT Aspect_Ada_2012, -- GNAT Aspect_Address, - Aspect_Aliased, Aspect_Alignment, Aspect_Atomic, Aspect_Atomic_Components, Aspect_Bit_Order, - Aspect_C_Pass_By_Copy, Aspect_Component_Size, Aspect_Discard_Names, Aspect_External_Tag, @@ -56,16 +58,14 @@ package Aspects is Aspect_Inline_Always, -- GNAT Aspect_Invariant, Aspect_Machine_Radix, + Aspect_No_Return, Aspect_Object_Size, -- GNAT Aspect_Pack, Aspect_Persistent_BSS, -- GNAT Aspect_Post, - Aspect_Postcondition, -- GNAT (equivalent to Post) Aspect_Pre, - Aspect_Precondition, -- GNAT (equivalent to Pre) Aspect_Predicate, -- GNAT??? Aspect_Preelaborable_Initialization, - Aspect_Psect_Object, -- GNAT Aspect_Pure_Function, -- GNAT Aspect_Shared, -- GNAT (equivalent to Atomic) Aspect_Size, @@ -83,17 +83,15 @@ package Aspects is Aspect_Value_Size, -- GNAT Aspect_Volatile, Aspect_Volatile_Components, - Aspect_Warnings, -- GNAT - Aspect_Weak_External); -- GNAT + Aspect_Warnings); -- GNAT -- The following array indicates aspects that accept 'Class Class_Aspect_OK : constant array (Aspect_Id) of Boolean := (Aspect_Invariant => True, Aspect_Pre => True, - Aspect_Precondition => True, + Aspect_Predicate => True, Aspect_Post => True, - Aspect_Postcondition => True, others => False); -- The following type is used for indicating allowed expression forms @@ -110,12 +108,10 @@ package Aspects is Aspect_Ada_2005 => Optional, Aspect_Ada_2012 => Optional, Aspect_Address => Expression, - Aspect_Aliased => Optional, Aspect_Alignment => Expression, Aspect_Atomic => Optional, Aspect_Atomic_Components => Optional, Aspect_Bit_Order => Expression, - Aspect_C_Pass_By_Copy => Optional, Aspect_Component_Size => Expression, Aspect_Discard_Names => Optional, Aspect_External_Tag => Expression, @@ -124,20 +120,18 @@ package Aspects is Aspect_Inline_Always => Optional, Aspect_Invariant => Expression, Aspect_Machine_Radix => Expression, + Aspect_No_Return => Optional, Aspect_Object_Size => Expression, - Aspect_Pack => Optional, Aspect_Persistent_BSS => Optional, + Aspect_Pack => Optional, Aspect_Post => Expression, - Aspect_Postcondition => Expression, Aspect_Pre => Expression, - Aspect_Precondition => Expression, Aspect_Predicate => Expression, Aspect_Preelaborable_Initialization => Optional, - Aspect_Psect_Object => Optional, Aspect_Pure_Function => Optional, Aspect_Shared => Optional, Aspect_Size => Expression, - Aspect_Storage_Pool => Expression, + Aspect_Storage_Pool => Name, Aspect_Storage_Size => Expression, Aspect_Stream_Size => Expression, Aspect_Suppress => Name, @@ -151,11 +145,50 @@ package Aspects is Aspect_Value_Size => Expression, Aspect_Volatile => Optional, Aspect_Volatile_Components => Optional, - Aspect_Warnings => Name, - Aspect_Weak_External => Optional); + Aspect_Warnings => Name); function Get_Aspect_Id (Name : Name_Id) return Aspect_Id; + pragma Inline (Get_Aspect_Id); -- Given a name Nam, returns the corresponding aspect id value. If the name -- does not match any aspect, then No_Aspect is returned as the result. + --------------------------------------------------- + -- Handling of Aspect Specifications in the Tree -- + --------------------------------------------------- + + -- Several kinds of declaration node permit aspect specifications in Ada + -- 2012 mode. If there was room in all the corresponding declaration nodes, + -- we could just have a field Aspect_Specifications pointing to a list of + -- nodes for the aspects (N_Aspect_Specification nodes). But there isn't + -- room, so we adopt a different approach. + + -- The following subprograms provide access to a specialized interface + -- implemented internally with a hash table in the body, that provides + -- access to aspect specifications. + + function Permits_Aspect_Specifications (N : Node_Id) return Boolean; + -- Returns True if the node N is a declaration node that permits aspect + -- specifications. All such nodes have the Has_Aspect_Specifications + -- flag defined. Returns False for all other nodes. + + function Aspect_Specifications (N : Node_Id) return List_Id; + -- Given a node N, returns the list of N_Aspect_Specification nodes that + -- are attached to this declaration node. If the node is in the class of + -- declaration nodes that permit aspect specifications, as defined by the + -- predicate above, and if their Has_Aspect_Specifications flag is set to + -- True, then this will always be a non-empty list. If this flag is set to + -- False, or the node is not in the declaration class permitting aspect + -- specifications, then No_List is returned. + + procedure Set_Aspect_Specifications (N : Node_Id; L : List_Id); + -- The node N must be in the class of declaration nodes that permit aspect + -- specifications and the Has_Aspect_Specifications flag must be False on + -- entry. L must be a non-empty list of N_Aspect_Specification nodes. This + -- procedure sets the Has_Aspect_Specifications flag to True, and makes an + -- entry that can be retrieved by a subsequent Aspect_Specifications call. + -- The parent of list L is set to reference the declaration node N. It is + -- an error to call this procedure with a node that does not permit aspect + -- specifications, or a node that has its Has_Aspect_Specifications flag + -- set True on entry, or with L being an empty list or No_List. + end Aspects; |