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    Length: 968 (0x3c8)
    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:     primary ::= integer
--  semantic:   primary.result = integer;
--
-- rule 1:
--  syntax:     primary ::= identifier
--  semantic:   symbol <| insert(identifier)
--              primary.result = symbol <| eval(identifier;
--
-- rule 2:
--  syntax:     primary ::= '('value')'
--  semantic:   primary.result = value.result
--
-- rule 3:
--  syntax:     primary ::= bloc
--  semantic:   primary.result = bloc
--
-- rule 4:
--  syntax      primary ::= string
--  semantic:   primary.result = string_class <| create(identifier)

with Object;
package Primary is

    type Node is private;
    Empty_Node : constant Node;

    procedure Parse (N : in out Node);
    procedure Unparse (N : in Node);
    function Interpret (N : Node) return Object.Reference;

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