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Function object.hashOf
Calculates the hash value of arg
with an optional seed
initial value.
The result might not be equal to typeid(T)
.
size_t hashOf(T)
(
auto ref T arg,
size_t seed
);
size_t hashOf(T)
(
auto ref T arg
);
Parameters
Name | Description |
---|---|
arg | argument to calculate the hash value of |
seed | optional seed value (may be used for hash chaining) |
Return
calculated hash value of arg
Example
class MyObject
{
size_t myMegaHash() const @safe pure nothrow
{
return 42;
}
}
struct Test
{
int a;
string b;
MyObject c;
size_t toHash() const pure nothrow
{
size_t hash = a .hashOf();
hash = b .hashOf(hash);
size_t h1 = c .myMegaHash();
hash = h1 .hashOf(hash); //Mix two hash values
return hash;
}
}
Authors
Walter Bright, Sean Kelly
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.