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    Length: 1675 (0x68b)
    Types: TextFile
    Names: »V«

└─⟦a7d1ea751⟧ Bits:30000550 8mm tape, Rational 1000, !users!projects 94_04_11
    └─⟦129cab021⟧ »DATA« 
        └─⟦this⟧ 

TextFile

-- This package parses and interprets the following rules:
--
-- rule 0:
--  syntax:   <bloc> ::= '{' <arguments> <statements> '}'
--  sementic:  bloc.result = statements.result


with Scanner;
with Object;
with Message;
with Symbols;

package Block is
    type Node is private;
    Empty_Node : constant Node;

    procedure Parse (N : in out Node);
    procedure Unparse (N : Node);
    function Is_First (T : Scanner.Token) return Boolean;
    function Interpret (N : Node) return Object.Reference;

    function Get_Ident (N : Node) return Message.Unary;
    function Get_Kwd (N : Node) return Message.Unary;
    function Get_Table (N : Node) return Symbols.Table;
    procedure Put_Table (This_Object : Object.Reference;
                         Named : Object.Tiny_String;
                         Into : in out Node);
    procedure Get_From_Table (Object_Named : Object.Tiny_String;
                              From_Block : Node;
                              Into : in out Object.Reference;
                              Status : out Boolean);
    procedure Put_Into_Table (This_Object : Object.Reference;
                              Named : Object.Tiny_String;
                              Into_Block : in out Node);

    function Get_Current_Node return Node;
    function Get_Current_Table return Symbols.Table;
    procedure Put_Current_Table (This_Object : Object.Reference;
                                 Named : Object.Tiny_String);
    function Get_Parent (N : Node) return Node;
    function Is_Nil (N : Node) return Boolean;

private
    type Node_Structure;
    type Node is access Node_Structure;
    Empty_Node : constant Node := null;
end Block;