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Rational R1000/400 Tapes

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Index: ┃ T V

⟦95038cb42⟧ TextFile

    Length: 892 (0x37c)
    Types: TextFile
    Names: »V«

Derivation

└─⟦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:     expression  ::= value
--  semantic:   expression.result =value.result;
--
--
-- rule 1:
--  syntax:     expression ::= 'pour'identifier 'prendre' value
--  semantic:   expression.result =  identifier.result
--              identifier.inherited= value.result

with Lex;
with Object;
package Expression is
    type Node is private;
    Empty_Node : constant Node;

    procedure Parse (N : in out Node; Error : out Boolean);  
    procedure Unparse (N : Node);
    function Is_First (T : Lex.Token) return Boolean;
    function Interpret (N : Node;
                        Inherited : Object.Reference := Object.Void_Reference)
                       return Object.Reference;

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