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with
Ada.Characters.Latin_1;
package body Packrat.Tokens is
package SU renames Ada.Strings.Unbounded;
package Latin renames Ada.Characters.Latin_1;
function "<"
(Left, Right : in Value_Holders.Holder)
return Boolean is
begin
return Left.Element < Right.Element;
end "<";
function "<"
(Left, Right : in Token_Type)
return Boolean is
begin
if Left.Start_At = Right.Start_At then
if Left.Identifier = Right.Identifier then
return Left.Token_Value < Right.Token_Value;
else
return Left.Identifier < Right.Identifier;
end if;
else
return Left.Start_At < Right.Start_At;
end if;
end "<";
function "<"
(Left, Right : in Token_Array)
return Boolean
is
function LT is new Array_Less_Than
(Base_Type => Token_Type,
Array_Type => Token_Array);
begin
return LT (Left, Right);
end "<";
function "<"
(Left, Right : Finished_Token_Type)
return Boolean
is
function LT is new Array_Less_Than
(Base_Type => Element_Type,
Array_Type => Element_Array);
begin
if Start (Left.Token) = Start (Right.Token) then
if Left.Finish = Right.Finish then
if Label (Left.Token) = Label (Right.Token) then
return Value (Left.Token) < Value (Right.Token);
else
return Label (Left.Token) < Label (Right.Token);
end if;
else
return Left.Finish < Right.Finish;
end if;
else
return Start (Left.Token) < Start (Right.Token);
end if;
end "<";
function "<"
(Left, Right : in Finished_Token_Array)
return Boolean
is
function LT is new Array_Less_Than
(Base_Type => Finished_Token_Type,
Array_Type => Finished_Token_Array);
begin
return LT (Left, Right);
end "<";
function Create
(Ident : in Label_Enum;
Start : in Positive;
Value : in Element_Array)
return Token_Type is
begin
return This : Token_Type do
This.Identifier := Ident;
This.Start_At := Start;
This.Token_Value := Value_Holders.To_Holder (Value);
end return;
end Create;
function Debug_String
(This : in Token_Type)
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) & " with value length" &
Integer'Image (This.Token_Value.Constant_Reference.Element'Length) & Latin.LF);
return -Result;
end Debug_String;
function Debug_String
(This : in Finished_Token_Type)
return String
is
Result : SU.Unbounded_String := +"";
begin
SU.Append (Result, "Token " & Label_Enum'Image (This.Token.Identifier) &
" at input position" & Integer'Image (This.Token.Start_At) & " to" &
Integer'Image (This.Finish) & " with value length" &
Integer'Image (This.Token.Token_Value.Constant_Reference.Element'Length) &
Latin.LF);
return -Result;
end Debug_String;
function Label
(This : in Token_Type)
return Label_Enum is
begin
return This.Identifier;
end Label;
function Start
(This : in Token_Type)
return Positive is
begin
return This.Start_At;
end Start;
function Value
(This : in Token_Type)
return Element_Array is
begin
return This.Token_Value.Element;
end Value;
function Is_Label
(This : in Token_Type)
return Boolean is
begin
return This.Identifier = Ident;
end Is_Label;
function Is_Start
(This : in Token_Type)
return Boolean is
begin
return This.Start_At = Start;
end Is_Start;
function Is_Value
(This : in Token_Type)
return Boolean is
begin
return This.Token_Value.Element = Value;
end Is_Value;
end Packrat.Tokens;
|
