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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
|
//------------------------------------------------------------------------------
// <copyright file="Operators.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
// <owner current="true" primary="false">[....]</owner>
// <owner current="false" primary="false">[....]</owner>
//------------------------------------------------------------------------------
namespace System.Data {
using System;
internal sealed class Operators {
private Operators() { /* prevent utility class from being insantiated*/ }
internal const int Noop = 0;
/* Unary operations */
internal const int Negative = 1;
internal const int UnaryPlus = 2;
internal const int Not = 3;
/* Binary operations */
internal const int BetweenAnd = 4;
internal const int In = 5;
internal const int Between = 6;
/* Beginning of Comparison (relationa) operators */
internal const int EqualTo = 7; // =
internal const int GreaterThen = 8; // >
internal const int LessThen = 9; // <
internal const int GreaterOrEqual = 10;// >=
internal const int LessOrEqual = 11; // <=
internal const int NotEqual = 12; // <>
/* End of Comparison (relational) operators */
internal const int Is = 13;
internal const int Like = 14;
/* Beginning of arithmetic operators */
internal const int Plus = 15; // +
internal const int Minus = 16; // -
internal const int Multiply = 17; // *
internal const int Divide = 18; // /
//internal final static int IntegerDiv = 19; // \
internal const int Modulo = 20; // %
//internal final static int Exponent = 21; // **
/* End of arithmetic operators */
/* Beginning of bitwise operators */
internal const int BitwiseAnd = 22; // &
internal const int BitwiseOr = 23; // |
internal const int BitwiseXor = 24; // ^
internal const int BitwiseNot = 25; // ~
/* End of bitwise operators */
/* Beginning of logical operators */
internal const int And = 26; // AND
internal const int Or = 27; // OR
// internal final static int Not is in the unary ops
/* End of logical operators */
/* Calls/multi-valued stuff */
internal const int Proc = 28;
internal const int Iff = 29;
internal const int Qual = 30;
internal const int Dot = 31;
/* 0-ary "operators" */
internal const int Null = 32;
internal const int True = 33;
internal const int False = 34;
internal const int Date = 35; // Date constant
internal const int GenUniqueId = 36; // Generate unique ID
internal const int GenGUID = 37; // Generate GUID
internal const int GUID = 38; // GUID constant
internal const int IsNot = 39;
internal static bool IsArithmetical(int op) {
return(op == Plus || op == Minus || op == Multiply || op == Divide || op == Modulo);
}
internal static bool IsLogical(int op) {
return(op == And || op == Or || op == Not || op == Is || op == IsNot);
}
internal static bool IsRelational(int op) {
return((EqualTo <= op ) && (op <= NotEqual));
}
/// <devdoc>
/// Operator priorities
/// </devdoc>
internal const int priStart = 0;
internal const int priSubstr = 1;
internal const int priParen = 2;
internal const int priLow = 3;
internal const int priImp = 4;
internal const int priEqv = 5;
internal const int priXor = 6;
internal const int priOr = 7;
internal const int priAnd = 8;
internal const int priNot = 9;
internal const int priIs = 10;
internal const int priBetweenInLike = 11;
internal const int priBetweenAnd = 12;
internal const int priRelOp = 13;
internal const int priConcat = 14;
internal const int priContains = 15;
internal const int priPlusMinus = 16;
internal const int priMod = 17;
internal const int priIDiv = 18;
internal const int priMulDiv = 19;
internal const int priNeg = 20;
internal const int priExp = 21;
internal const int priProc = 22;
internal const int priDot = 23;
internal const int priMax = 24;
/// <devdoc>
/// Mapping from Operator to prioritys
///
private static readonly int[] priority = new int[] {
priStart, // Noop
priNeg, priNeg, priNot, // Unary -, +, Not
priBetweenAnd, priBetweenInLike, priBetweenInLike,
priRelOp, priRelOp, priRelOp, priRelOp, priRelOp, priRelOp,
priIs,
priBetweenInLike, // Like
priPlusMinus, priPlusMinus, // +, -
priMulDiv, priMulDiv, priIDiv, priMod, // *, /, \, Mod
priExp, // **
priAnd, priOr, priXor, priNot,
priAnd, priOr,
priParen, priProc, priDot, priDot, // Proc, Iff, Qula, Dot..
priMax, priMax, priMax, priMax, priMax, priMax, priMax,
priMax, priMax, priMax, priMax,
priMax,
};
internal static int Priority(int op) {
if (op > priority.Length)
return priMax;
return priority[op];
}
/// <devdoc>
/// this is array used for error messages.
/// </devdoc>
static readonly string[] Looks = new string[] {
"", //Noop = 0;
/* Unary operations */
"-", //Negative = 1;
"+", //UnaryPlus = 2;
"Not", //Not = 3;
/* Binary operations */
"BetweenAnd", //BetweenAnd = 4;
"In", //In = 5;
"Between", //Between = 6;
/* Beginning of Comparison (relationa) operators */
"=", //EqualTo = 7; // =
">", //GreaterThen = 8; // >
"<", //LessThen = 9; // <
">=", //GreaterOrEqual = 10;// >=
"<=", //LessOrEqual = 11; // <=
"<>", //NotEqual = 12; // <>
/* End of Comparison (relational) operators */
"Is", //Is = 13;
"Like", //Like = 14;
/* Beginning of arithmetic operators */
"+", //Plus = 15; // +
"-", //Minus = 16; // -
"*", //Multiply = 17; // *
"/", //Divide = 18; // /
"\\", //IntegerDiv = 19; // \
"Mod", //Modulo = 20; // %
"**", //Exponent = 21; // **
/* End of arithmetic operators */
/* Beginning of bitwise operators */
"&", //BitwiseAnd = 22; // &
"|", //BitwiseOr = 23; // |
"^", //BitwiseXor = 24; // ^
"~", //BitwiseNot = 25; // ~
/* End of bitwise operators */
/* Beginning of logical operators */
"And", //And = 26; // AND
"Or", //Or = 27; // OR
// Not is in the unary ops
/* End of logical operators */
/* Calls/multi-valued stuff */
"Proc", //Proc = 28;
"Iff", //Iff = 29;
".", //Qual = 30;
".", //Dot = 31;
/* 0-ary "operators" */
"Null", //Null = 32;
"True", //True = 33;
"False", //False = 34;
"Date", //Date = 35; // Date constant
"GenUniqueId()", //GenUniqueId = 36; // Generate unique ID
"GenGuid()", //GenGUID = 37; // Generate GUID
"Guid {..}", //GUID = 38; // GUID constant
"Is Not", //IsNot = 39; // internal only
};
internal static string ToString(int op) {
string st;
if (op <= Looks.Length)
st = Looks[op];
else
st = "Unknown op";
return st;
}
}
}
|
