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with
Ada.Text_IO,
Packrat.No_Lex,
Packrat.Utilities;
use
Ada.Text_IO;
procedure Ssss is
Input : String := "xxxx";
type Parser_Labels is (S, X);
package My_Rat is new Packrat.No_Lex (Parser_Labels, Character, String);
package S_Redir is new My_Rat.Parsers.Redirect;
function Match_X is new My_Rat.Parsers.Match ('x');
function Let_X is new My_Rat.Parsers.Stamp (X, Match_X);
function S_Seq is new My_Rat.Parsers.Sequence
((Let_X'Access, S_Redir.Call'Access, S_Redir.Call'Access));
function S_Choice is new My_Rat.Parsers.Choice
((S_Seq'Access, My_Rat.Parsers.Empty'Access));
function S is new My_Rat.Parsers.Stamp (S, S_Choice);
package Parser is new My_Rat.Parsers.Parse_Once (S);
Result_Graph : My_Rat.Parser_Result;
begin
S_Redir.Set (S'Access);
Result_Graph := Parser.Parse (Input);
Put_Line ("Input:");
Put_Line (Input);
New_Line;
Put_Line ("Parser graph output:");
Put_Line (My_Rat.Parse_Graphs.Debug_String (Result_Graph));
New_Line;
Put_Line ("Root tokens:");
for T of Result_Graph.Root_Elements loop
Put (My_Rat.Parser_Tokens.Debug_String (T));
end loop;
end Ssss;
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