hunt.sql.parser.SQLParserFeature source code

1 module hunt.sql.parser.SQLParserFeature;
2 
3 import std.string;
4 
5 struct SQLParserFeature {
6     enum SQLParserFeature KeepInsertValueClauseOriginalString = SQLParserFeature(0);
7     enum SQLParserFeature KeepSelectListOriginalString = SQLParserFeature(1); // for improved sql parameterized performance
8     enum SQLParserFeature UseInsertColumnsCache = SQLParserFeature(2);
9     enum SQLParserFeature EnableSQLBinaryOpExprGroup = SQLParserFeature(3);
10     enum SQLParserFeature OptimizedForParameterized = SQLParserFeature(4);
11     enum SQLParserFeature OptimizedForForParameterizedSkipValue = SQLParserFeature(5);
12     enum SQLParserFeature KeepComments = SQLParserFeature(6);
13     enum SQLParserFeature SkipComments = SQLParserFeature(7);
14     enum SQLParserFeature StrictForWall = SQLParserFeature(8);
15 
16     enum SQLParserFeature PipesAsConcat = 9; // for mysql
17 
18     this(int ord){
19         mask = (1 << ord);
20     }
21 
22     public  int mask;
23 
24 
25     public static bool isEnabled(int features, SQLParserFeature feature) {
26         return (features & feature.mask) != 0;
27     }
28 
29     public static int config(int features, SQLParserFeature feature, bool state) {
30         if (state) {
31             features |= feature.mask;
32         } else {
33             features &= ~feature.mask;
34         }
35 
36         return features;
37     }
38 
39     public static int of(SQLParserFeature[] features...) {
40         if (features is null) {
41             return 0;
42         }
43 
44         int value = 0;
45 
46         foreach(SQLParserFeature feature; features) {
47             value |= feature.mask;
48         }
49 
50         return value;
51     }
52 
53     bool opEquals(const SQLParserFeature h) nothrow {
54         return mask == h.mask ;
55     } 
56 
57     bool opEquals(ref const SQLParserFeature h) nothrow {
58         return mask == h.mask ;
59     } 
60 }
61 
62 unittest{
63     SQLParserFeature p = SQLParserFeature.KeepComments;
64     assert(p == SQLParserFeature.KeepComments);
65 }