dpq2.types.from_d_types source code

1 module dpq2.types.from_d_types;
2 
3 @safe:
4 
5 import dpq2;
6 import std.bitmanip: nativeToBigEndian;
7 import std.traits: isNumeric;
8 
9 @property Value toValue(T)(T v)
10 if(isNumeric!(T))
11 {
12     return Value(v.nativeToBigEndian.dup, detectOidType!T, false, ValueFormat.BINARY);
13 }
14 
15 unittest
16 {
17     {
18         Value v = toValue(cast(short) 123);
19 
20         assert(v.oidType == OidType.Int2);
21         assert(v.as!short == 123);
22     }
23 
24     {
25         Value v = toValue(-123.456);
26 
27         assert(v.oidType == OidType.Float8);
28         assert(v.as!double == -123.456);
29     }
30 }
31 
32 @property Value toValue(T)(T v, ValueFormat valueFormat = ValueFormat.BINARY) @trusted
33 if(is(T == string))
34 {
35     if(valueFormat == ValueFormat.TEXT) v = v~'\0'; // for prepareArgs only
36 
37     ubyte[] buf = cast(ubyte[]) v;
38 
39     return Value(buf, detectOidType!T, false, valueFormat);
40 }
41 
42 unittest
43 {
44     Value v = toValue("Test string");
45 
46     assert(v.oidType == OidType.Text);
47     assert(v.as!string == "Test string");
48 }
49 
50 private OidType detectOidType(T)()
51 {
52     with(OidType)
53     {
54         static if(is(T == string)){ return Text; } else
55         static if(is(T == short)){ return Int2; } else
56         static if(is(T == int)){ return Int4; } else
57         static if(is(T == long)){ return Int8; } else
58         static if(is(T == float)){ return Float4; } else
59         static if(is(T == double)){ return Float8; } else
60 
61         static assert(false, "Unsupported D type: "~T.stringof);
62     }
63 }