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Enum member `std.digest.hasPeek`

Used to check if a digest supports the peek method. Peek has exactly the same function signatures as finish, but it doesn't reset the digest's internal state.


						
				enum hasPeek(T)
				 = isDigest!T && is(typeof(()
{
T dig = void;
DigestType!T val = dig.peek();
}
));

Note

This is very useful as a template constraint (see examples)
This also checks if T passes isDigest

Example

import std.digest.crc, std.digest.md;
assert(!hasPeek!(MD5));
assert(hasPeek!CRC32);

Example

import std.digest.crc;
void myFunction(T)()
if (hasPeek!T)
{
    T dig;
    dig.start();
    auto result = dig.peek();
}
myFunction!CRC32();

Authors

Johannes Pfau

License

Boost License 1.0.

API Documentation

Enum member std.digest.hasPeek

Note

Example

Example

Authors

License

Enum member `std.digest.hasPeek`