View source code
Display the source code in std/sumtype.d from which thispage was generated on github.
Report a bug
If you spot a problem with this page, click here to create aBugzilla issue.
Improve this page
Quickly fork, edit online, and submit a pull request for this page.Requires a signed-in GitHub account. This works well for small changes.If you'd like to make larger changes you may want to consider usinglocal clone.
Enum member std.sumtype.isSumType
True if T is a [SumType] or implicitly converts to one, otherwise false.
enum isSumType(T) = is(T : SumType!Args, Args...);
Example
static struct ConvertsToSumType
{
SumType!int payload;
alias payload this;
}
static struct ContainsSumType
{
SumType!int payload;
}
assert(isSumType!(SumType!int));
assert(isSumType!ConvertsToSumType);
assert(!isSumType!ContainsSumType);
Authors
Paul Backus
License
Boost License 1.0
Copyright © 1999-2025 by the D Language Foundation | Page generated by ddox.