Source
pub fn getAutoHashFn(comptime K: type, comptime Context: type) (fn (Context, K) u64) {
comptime {
assert(@hasDecl(std, "StringHashMap")); // detect when the following message needs updated
if (K == []const u8) {
@compileError("std.hash.autoHash does not allow slices here (" ++
@typeName(K) ++
") because the intent is unclear. " ++
"Consider using std.StringHashMap for hashing the contents of []const u8. " ++
"Alternatively, consider using std.hash.autoHashStrat or providing your own hash function instead.");
}
}
return struct {
fn hash(ctx: Context, key: K) u64 {
_ = ctx;
if (std.meta.hasUniqueRepresentation(K)) {
return Wyhash.hash(0, std.mem.asBytes(&key));
} else {
var hasher = Wyhash.init(0);
autoHash(&hasher, key);
return hasher.final();
}
}
}.hash;
}