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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

Boost License 1.0.

API Documentation

Enum member std.digest.isDigest

Note

BUGS

Example

Example

Authors

License

Enum member `std.digest.isDigest`