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Template std.sumtype.tryMatch

Attempts to call a type-appropriate function with the value held in a [SumType], and throws on failure.

template tryMatch(handlers...) ;

Matches are chosen using the same rules as [match], but are not required to be exhaustive—in other words, a type (or combination of types) is allowed to have no matching handler. If a type without a handler is encountered at runtime, a [MatchException] is thrown.

Not available when compiled with -betterC.

Contained Functions

NameDescription
tryMatch The actual tryMatch function.

Returns

The value returned from the handler that matches the currently-held type, if a handler was given for that type.

Throws

[MatchException], if the currently-held type has no matching handler.

See Also

tryVisit

See Also

tryVisit

Authors

Paul Backus

License

Boost License 1.0