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with
Ada.Containers,
Packrat.Traits;
private with
Ada.Containers.Vectors,
Ada.Containers.Ordered_Maps,
Directed_Graphs;
generic
with package Traits is new Packrat.Traits (<>);
package Packrat.Parse_Graphs is
type Parse_Graph is tagged private;
function "="
(Left, Right : in Parse_Graph)
return Boolean;
Empty_Graph : constant Parse_Graph;
type Token_Group is private with Type_Invariant => Integer (Length (Token_Group)) > 0;
type Token_Group_Array is array (Positive range <>) of Token_Group;
function "<"
(Left, Right : in Token_Group)
return Boolean;
procedure Assign
(Target : in out Parse_Graph;
Source : in Parse_Graph);
function Copy
(Source : in Parse_Graph)
return Parse_Graph;
procedure Move
(Target, Source : in out Parse_Graph);
function Is_Empty
(Container : in Parse_Graph)
return Boolean;
procedure Clear
(Container : in out Parse_Graph);
function Debug_String
(Container : in Parse_Graph)
return String;
function Contains
(Container : in Parse_Graph;
Token : in Traits.Tokens.Token_Type)
return Boolean;
function Contains
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Boolean;
function Contains
(Container : in Parse_Graph;
Grouping : in Token_Group)
return Boolean;
function Reachable
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Boolean
with Pre => Container.Has_Root;
function All_Reachable
(Container : in Parse_Graph)
return Boolean
with Pre => Container.Has_Root;
function Valid_Token
(Fin_Token : in Traits.Tokens.Finished_Token_Type)
return Boolean;
function Valid_Starts_Finishes
(Parent : in Traits.Tokens.Finished_Token_Type;
Subtokens : in Traits.Tokens.Finished_Token_Array)
return Boolean
with Pre => Subtokens'Length > 0;
function Loops_Introduced
(Container : in Parse_Graph;
Parent : in Traits.Tokens.Finished_Token_Type;
Subtokens : in Traits.Tokens.Finished_Token_Array)
return Boolean
with Pre => Subtokens'Length > 0 and
Valid_Starts_Finishes (Parent, Subtokens);
function Is_Sorted
(Finishes : in Traits.Tokens.Finish_Array)
return Boolean;
function Is_Sorted
(Positions : in Traits.Tokens.Finished_Token_Array)
return Boolean;
function Is_Sorted
(Groupings : in Token_Group_Array)
return Boolean;
function No_Duplicates
(Finishes : in Traits.Tokens.Finish_Array)
return Boolean;
function No_Duplicates
(Positions : in Traits.Tokens.Finished_Token_Array)
return Boolean;
function No_Duplicates
(Groupings : in Token_Group_Array)
return Boolean;
procedure Include
(Container : in out Parse_Graph;
Token : in Traits.Tokens.Token_Type)
with Post => Container.Contains (Token);
procedure Connect
(Container : in out Parse_Graph;
Parent : in Traits.Tokens.Finished_Token_Type;
Subtokens : in Traits.Tokens.Finished_Token_Array)
with Pre => Subtokens'Length > 0 and
Valid_Starts_Finishes (Parent, Subtokens) and
not Container.Loops_Introduced (Parent, Subtokens);
procedure Prune
(Container : in out Parse_Graph;
Token : in Traits.Tokens.Token_Type)
with Post => not Container.Contains (Token);
procedure Prune
(Container : in out Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
with Post => not Container.Contains (Position);
procedure Prune
(Container : in out Parse_Graph;
Grouping : in Token_Group)
with Post => not Container.Contains (Grouping);
procedure Delete_Unreachable
(Container : in out Parse_Graph)
with Pre => Container.Has_Root,
Post => Container.All_Reachable;
function Has_Root
(Container : in Parse_Graph)
return Boolean;
procedure Set_Root
(Container : in out Parse_Graph;
Tokens : in Traits.Tokens.Finished_Token_Array)
with Pre => (for all F of Tokens => Container.Contains (F.Token)),
Post => Container.Has_Root;
procedure Clear_Root
(Container : in out Parse_Graph)
with Post => not Container.Has_Root;
function Root_Elements
(Container : in Parse_Graph)
return Traits.Tokens.Finished_Token_Array
with Pre => Container.Has_Root;
function Finish_List
(Container : in Parse_Graph;
Token : in Traits.Tokens.Token_Type)
return Traits.Tokens.Finish_Array
with Pre => Container.Contains (Token),
Post => Is_Sorted (Finish_List'Result) and
No_Duplicates (Finish_List'Result);
function Is_Leaf
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Boolean
with Pre => Container.Contains (Position);
function Is_Branch
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Boolean
with Pre => Container.Contains (Position);
function Subgroups
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Token_Group_Array
with Pre => Container.Contains (Position),
Post => Is_Sorted (Subgroups'Result) and
No_Duplicates (Subgroups'Result) and
(for all G of Subgroups'Result => Finish (G) = Position.Finish);
function First_Index
(Grouping : in Token_Group)
return Positive;
function Last_Index
(Grouping : in Token_Group)
return Positive;
function Length
(Grouping : in Token_Group)
return Ada.Containers.Count_Type;
function Element
(Grouping : in Token_Group;
Index : in Positive)
return Traits.Tokens.Finished_Token_Type
with Pre => Index in First_Index (Grouping) .. Last_Index (Grouping);
function Elements
(Grouping : in Token_Group)
return Traits.Tokens.Finished_Token_Array
with Post => Is_Sorted (Elements'Result) and
Valid_Starts_Finishes (Parent (Grouping), Elements'Result);
function Parent
(Grouping : in Token_Group)
return Traits.Tokens.Finished_Token_Type;
function Finish
(Grouping : in Token_Group)
return Traits.Tokens.Finish_Type;
-- An ambiguous graph means that either some node exists with multiple groups
-- attached to it with the same Group_Finish value, or the root node has multiple
-- groups of any Group_Finish value attached to it, or there are multiple
-- root nodes.
function Is_Root_Ambiguous
(Container : in Parse_Graph)
return Boolean
with Pre => Container.Has_Root;
function Is_Ambiguous
(Container : in Parse_Graph)
return Boolean;
function Ambiguities
(Container : in Parse_Graph;
Ambiguous_Root : out Boolean)
return Traits.Tokens.Finished_Token_Array
with Post => Is_Sorted (Ambiguities'Result) and
No_Duplicates (Ambiguities'Result);
function Isomorphic
(Left, Right : in Parse_Graph)
return Boolean
with Pre => Left.Has_Root and Right.Has_Root;
function Isomorphic_Subgraph
(Left_Graph : in Parse_Graph;
Left_Position : in Traits.Tokens.Finished_Token_Type;
Right_Graph : in Parse_Graph;
Right_Position : in Traits.Tokens.Finished_Token_Type)
return Boolean
with Pre => Left_Graph.Contains (Left_Position) and
Right_Graph.Contains (Right_Position);
private
use type Traits.Label_Enum;
use type Traits.Element_Type;
use type Traits.Element_Array;
type Node_ID_Type is new Positive;
type Edge_ID_Type is new Positive;
subtype Node_Label_Type is Traits.Tokens.Token_Type;
subtype Group_ID_Type is Positive;
type Edge_Label_Type is record
Group_ID : Group_ID_Type;
Group_Finish : Traits.Tokens.Finish_Type;
Subnode_Finish : Traits.Tokens.Finish_Type;
end record;
function To_Node
(Container : in Parse_Graph;
Token : in Traits.Tokens.Token_Type)
return Node_ID_Type;
function To_Node
(Container : in Parse_Graph;
Position : in Traits.Tokens.Finished_Token_Type)
return Node_ID_Type;
function Locally_Reachable
(Container : in Parse_Graph;
Node : in Node_ID_Type)
return Boolean;
-- This 'use type' is to avoid some ambiguities with "=" functions when
-- instantiating the Base package.
use type Traits.Tokens.Token_Type;
package Base is new Directed_Graphs
(Node_ID_Type => Node_ID_Type,
Edge_ID_Type => Edge_ID_Type,
Node_Label_Type => Node_Label_Type,
Edge_Label_Type => Edge_Label_Type);
package Finished_Token_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Traits.Tokens.Finished_Token_Type,
"=" => Traits.Tokens."=");
function "<"
(Left, Right : in Finished_Token_Vectors.Vector)
return Boolean;
type Token_Group is record
Parent : Traits.Tokens.Finished_Token_Type;
Elems : Finished_Token_Vectors.Vector;
end record;
package Finish_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Traits.Tokens.Finish_Type);
package Finish_Sort is new Finish_Vectors.Generic_Sorting;
package Node_Label_Maps is new Ada.Containers.Ordered_Maps
(Key_Type => Traits.Tokens.Token_Type,
Element_Type => Node_ID_Type,
"<" => Traits.Tokens."<");
type Parse_Graph is tagged record
Internal_Graph : Base.Graph := Base.Empty_Graph;
Root_Elems : Finished_Token_Vectors.Vector := Finished_Token_Vectors.Empty_Vector;
Label_Map : Node_Label_Maps.Map := Node_Label_Maps.Empty_Map;
end record;
-- should a lot of these actually be ordered sets instead?
package Node_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Node_ID_Type);
package Group_ID_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Group_ID_Type);
package Token_Group_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Token_Group);
package Finished_Token_Sort is new
Finished_Token_Vectors.Generic_Sorting ("<" => Traits.Tokens."<");
package Token_Group_Sort is new Token_Group_Vectors.Generic_Sorting;
package Group_Finished_Token_Maps is new Ada.Containers.Ordered_Maps
(Key_Type => Group_ID_Type,
Element_Type => Finished_Token_Vectors.Vector,
"=" => Finished_Token_Vectors."=");
package Finish_Group_Maps is new Ada.Containers.Ordered_Maps
(Key_Type => Traits.Tokens.Finish_Type,
Element_Type => Group_ID_Type);
package Enum_Node_Maps is new Ada.Containers.Ordered_Maps
(Key_Type => Traits.Label_Enum,
Element_Type => Node_Vectors.Vector,
"=" => Node_Vectors."=");
package Isomorph_Maps is new Ada.Containers.Ordered_Maps
(Key_Type => Traits.Tokens.Finished_Token_Type,
Element_Type => Finished_Token_Vectors.Vector,
"=" => Finished_Token_Vectors."=",
"<" => Traits.Tokens."<");
function Group_Isomorph
(Left_Graph : in Parse_Graph;
Left_Token_Group : in Token_Group;
Right_Graph : in Parse_Graph;
Right_Token_Group : in Token_Group;
Offset : in Integer;
Mapping : in out Isomorph_Maps.Map)
return Boolean;
function Token_Isomorph
(Left_Graph : in Parse_Graph;
Left_Position : in Traits.Tokens.Finished_Token_Type;
Right_Graph : in Parse_Graph;
Right_Position : in Traits.Tokens.Finished_Token_Type;
Offset : in Integer;
Mapping : in out Isomorph_Maps.Map)
return Boolean;
Empty_Graph : constant Parse_Graph :=
(Internal_Graph => Base.Empty_Graph,
Root_Elems => Finished_Token_Vectors.Empty_Vector,
Label_Map => Node_Label_Maps.Empty_Map);
generic
type Base_Type is private;
type Array_Type is array (Positive range <>) of Base_Type;
with function "<" (Left, Right : in Base_Type) return Boolean is <>;
function Sorted
(Input : in Array_Type)
return Boolean;
generic
type Base_Type is private;
type Array_Type is array (Positive range <>) of Base_Type;
with function "=" (Left, Right : in Base_Type) return Boolean is <>;
function No_Dups
(Input : in Array_Type)
return Boolean;
generic
type Base_Type is private;
type Array_Type is array (Positive range <>) of Base_Type;
with package Type_Vectors is new Ada.Containers.Vectors
(Index_Type => Positive,
Element_Type => Base_Type);
function Vector_To_Array
(Input : in Type_Vectors.Vector)
return Array_Type;
end Packrat.Parse_Graphs;
|