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with
Ada.Unchecked_Deallocation,
Ada.Characters.Latin_1;
separate (Packrat)
package body Tokens is
package SU renames Ada.Strings.Unbounded;
package Latin renames Ada.Characters.Latin_1;
procedure Free_Array is new Ada.Unchecked_Deallocation
(Object => Element_Array, Name => Element_Array_Access);
procedure Initialize
(This : in out Token) is
begin
This.Start_At := 1;
This.Finish_At := 0;
end Initialize;
procedure Adjust
(This : in out Token) is
begin
if This.Token_Value /= null then
declare
New_Array : Element_Array_Access :=
new Element_Array (1 .. This.Token_Value'Length);
begin
New_Array.all := This.Token_Value.all;
This.Token_Value := New_Array;
end;
end if;
end Adjust;
procedure Finalize
(This : in out Token) is
begin
if This.Token_Value /= null then
Free_Array (This.Token_Value);
end if;
end Finalize;
function Create
(Ident : in Label_Enum;
Start : in Positive;
Finish : in Natural;
Value : in Element_Array)
return Token
is
This : Token;
begin
This.Identifier := Ident;
This.Start_At := Start;
This.Finish_At := Finish;
This.Token_Value := new Element_Array (1 .. Value'Length);
This.Token_Value.all := Value;
return This;
end Create;
function Initialized
(This : in Token)
return Boolean is
begin
return This.Token_Value /= null;
end Initialized;
function Debug_String
(This : in Token)
return String
is
Result : SU.Unbounded_String := +"";
begin
SU.Append (Result, "Token " & Label_Enum'Image (This.Identifier) &
" at input position" & Integer'Image (This.Start_At) & " to" &
Integer'Image (This.Finish_At) & " with value length" &
Integer'Image (This.Token_Value'Length) & Latin.LF);
return -Result;
end Debug_String;
function Label
(This : in Token)
return Label_Enum is
begin
return This.Identifier;
end Label;
function Start
(This : in Token)
return Positive is
begin
return This.Start_At;
end Start;
function Finish
(This : in Token)
return Natural is
begin
return This.Finish_At;
end Finish;
function Value
(This : in Token)
return Element_Array is
begin
return This.Token_Value.all;
end Value;
end Tokens;
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