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Enum member std.digest.isDigest
Use this to check if a type is a digest. See ExampleDigest
to see what
a type must provide to pass this check.
enum isDigest(T)
= isOutputRange!(T, const(ubyte)[]) && isOutputRange!(T, ubyte) && is(T == struct) && is(typeof(()
{
T dig = void;
dig .put(cast(ubyte)0, cast(ubyte)0);
dig .start();
auto value = dig .finish();
}
));
Note
This is very useful as a template constraint (see examples)
BUGS
- Does not yet verify that put takes scope parameters.
- Should check that finish() returns a ubyte[num] array
Example
import std .digest .crc;
static assert(isDigest!CRC32);
Example
import std .digest .crc;
void myFunction(T)()
if (isDigest!T)
{
T dig;
dig .start();
auto result = dig .finish();
}
myFunction!CRC32();
Authors
Johannes Pfau
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.