blob: 81d68c36df50712c5befc276cfcac1721e3d9cef (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
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)
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,
Array_Type => Token_Array);
begin
return LT (Left, Right);
end "<";
function Create
(Ident : in Label_Enum;
Start : in Positive;
Value : in Element_Array)
return Token is
begin
return This : Token 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)
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 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 Value
(This : in Token)
return Element_Array is
begin
return This.Token_Value.Element;
end Value;
function Is_Label
(This : in Token)
return Boolean is
begin
return This.Identifier = Ident;
end Is_Label;
function Is_Start
(This : in Token)
return Boolean is
begin
return This.Start_At = Start;
end Is_Start;
function Is_Value
(This : in Token)
return Boolean is
begin
return This.Token_Value.Element = Value;
end Is_Value;
end Packrat.Tokens;
|