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Move custom types to Node (#213)

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Move custom types to Node
merged-on-behalf-of: BBasile <BBasile@users.noreply.github.com>
This commit is contained in:
Cameron Ross 2019-01-15 04:07:50 -03:30 • committed by The Dlang Bot
parent beb160f1eb
commit 7f913246ea
20 changed files with 1152 additions and 1679 deletions
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120
examples/constructor/main.d
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@ -8,80 +8,70 @@ struct Color
ubyte green;
ubyte blue;
const int opCmp(ref const Color c)
this(ubyte r, ubyte g, ubyte b) @safe
{
if(red != c.red) {return red - c.red;}
if(green != c.green){return green - c.green;}
if(blue != c.blue) {return blue - c.blue;}
return 0;
red = r;
green = g;
blue = b;
}
this(const Node node, string tag) @safe
{
if (tag == "!color-mapping")
{
//Will throw if a value is missing, is not an integer, or is out of range.
red = node["r"].as!ubyte;
green = node["g"].as!ubyte;
blue = node["b"].as!ubyte;
}
else
{
string value = node.as!string;
if(value.length != 6)
{
throw new Exception("Invalid color: " ~ value);
}
//We don't need to check for uppercase chars this way.
value = value.toLower();
//Get value of a hex digit.
uint hex(char c)
{
import std.ascii;
if(!std.ascii.isHexDigit(c))
{
throw new Exception("Invalid color: " ~ value);
}
if(std.ascii.isDigit(c))
{
return c - '0';
}
return c - 'a' + 10;
}
red = cast(ubyte)(16 * hex(value[0]) + hex(value[1]));
green = cast(ubyte)(16 * hex(value[2]) + hex(value[3]));
blue = cast(ubyte)(16 * hex(value[4]) + hex(value[5]));
}
}
}
Color constructColorScalar(ref Node node) @safe
void main(string[] args)
{
string value = node.as!string;
if(value.length != 6)
{
throw new Exception("Invalid color: " ~ value);
}
//We don't need to check for uppercase chars this way.
value = value.toLower();
//Get value of a hex digit.
uint hex(char c)
{
import std.ascii;
if(!std.ascii.isHexDigit(c))
{
throw new Exception("Invalid color: " ~ value);
}
if(std.ascii.isDigit(c))
{
return c - '0';
}
return c - 'a' + 10;
}
Color result;
result.red = cast(ubyte)(16 * hex(value[0]) + hex(value[1]));
result.green = cast(ubyte)(16 * hex(value[2]) + hex(value[3]));
result.blue = cast(ubyte)(16 * hex(value[4]) + hex(value[5]));
return result;
}
Color constructColorMapping(ref Node node) @safe
{
ubyte r,g,b;
//Might throw if a value is missing is not an integer, or is out of range.
//If this happens, D:YAML will handle the exception and use its message
//in a YAMLException thrown when loading.
r = node["r"].as!ubyte;
g = node["g"].as!ubyte;
b = node["b"].as!ubyte;
return Color(cast(ubyte)r, cast(ubyte)g, cast(ubyte)b);
}
void main()
{
auto red = Color(255, 0, 0);
auto red = Color(255, 0, 0);
auto orange = Color(255, 255, 0);
string path = "input.yaml";
if (args.length > 1)
{
path = args[1];
}
try
{
auto constructor = new Constructor;
//both functions handle the same tag, but one handles scalar, one mapping.
constructor.addConstructorScalar("!color", &constructColorScalar);
constructor.addConstructorMapping("!color-mapping", &constructColorMapping);
auto loader = Loader.fromFile("input.yaml");
loader.constructor = constructor;
auto root = loader.load();
auto root = Loader.fromFile(path).load();
if(root["scalar-red"].as!Color == red &&
root["mapping-red"].as!Color == red &&