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Rational R1000/400 Tapes

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artifacts from Datamuseum.dk's BitArchive.

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Index: ┃ B T ┃

⟦688c5d9d1⟧ TextFile

    Length: 1278 (0x4fe)
    Types: TextFile
    Names: »B«

Derivation

└─⟦2f6cfab89⟧ Bits:30000547 8mm tape, Rational 1000, !projects 94-01-04
    └─ ⟦d65440be7⟧ »DATA« 
        └─⟦this⟧

TextFile

with Object, More_Unary, Primary, Scanner, Text_Io;
package body Unary is

    type Node_Structure is
        record
            Rule : Natural range 0 .. 1 := 0;
            More : More_Unary.Node := More_Unary.Empty_Node;
            Prim : Primary.Node := Primary.Empty_Node;
        end record;

    procedure Parse (N : in out Node; Error : out Boolean) is
        Failed : Boolean := False;
        use Scanner;
    begin
        Text_Io.Put_Line ("I am in unary.parse");
        N := new Node_Structure;  
        Primary.Parse (N.Prim, Failed);
        Scanner.Next;
        if not Failed and More_Unary.Is_First (Scanner.Get_Token) then
            N.Rule := 1;
            More_Unary.Parse (N.More, Failed);
        end if;
        Error := Failed;
    end Parse;

    function Interpret (N : Node) return Object.Reference is
        Result : Object.Reference;
    begin  
        Text_Io.Put_Line ("I am in unary.interpret" & Integer'Image (N.Rule));
        case N.Rule is
            when 0 =>
                Result := Primary.Interpret (N.Prim);
            when 1 =>  
                Result := Primary.Interpret (N.Prim);
                Result := More_Unary.Interpret (N.More, Result);
        end case;
        return (Result);  
    end Interpret;
end Unary;