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top - downloadIndex: ┃ B T ┃
Length: 1178 (0x49a)
Types: TextFile
Names: »B«
└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
└─ ⟦129cab021⟧ »DATA«
└─⟦this⟧
└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
└─ ⟦d65440be7⟧ »DATA«
└─⟦this⟧
with Scanner;
with Object;
with Unary, More_Binary;
package body Binary is
type Node_Structure is
record
Rule : Natural range 0 .. 1 := 0;
Unar : Unary.Node := Unary.Empty_Node;
More : More_Binary.Node := More_Binary.Empty_Node;
end record;
procedure Parse (N : in out Node; Error : out Boolean) is
Failed : Boolean := False;
use Scanner;
begin
N := new Node_Structure;
N.Rule := 0;
Unary.Parse (N.Unar, Failed);
if not Failed and then Scanner.Get_Token = Scanner.Binary then
N.Rule := 1;
More_Binary.Parse (N.More, Failed);
end if;
Error := Failed;
end Parse;
function Is_First (T : Scanner.Token) return Boolean is
use Scanner;
begin
return Unary.Is_First (T);
end Is_First;
function Interpret (N : Node) return Object.Reference is
Result : Object.Reference;
begin
Result := Unary.Interpret (N.Unar);
if N.Rule = 1 then
Result := More_Binary.Interpret (N.More, Result);
end if;
return Result;
end Interpret;
end Binary;