CODEWITHSUNDEEP
rustmatch
Stepan Yakovenko
Stepan Yakovenko

Reputation: 9206

rust E0061: Some(A) is not the same as Some(match ... =>A)

This code compiles fine:

Some(match head.path {
  "/" => Hello,
  "/num" => GetNum,
   p if p.starts_with('/') => HelloName(p[1..].to_string()),
   _ => PageNotFound
 }, RecvMode::Buffered(1024), scope.now() + Duration::new(10, 0))

If I change it to 

Some(Hello, RecvMode::Buffered(1024),
         scope.now() + Duration::new(10, 0))

I get 

error: this function takes 1 parameter but 3 parameters were supplied [E0061]

Why? Does match construction same semantics as 

x>0?A:B

?

Function return value is declared as 

Option<(Self, RecvMode, Time).

I was asked to provide MCVE, but I am not ready for that, that's why I'll give a link to sample, which I'm trying to change. To build it, add following dependencies to cargo.ml:

rotor = "0.6.3" rotor-http = "0.7.0"

Upvotes: 0

Views: 323

Answers (1)

JDemler
JDemler

Reputation: 1306

The code from your question does not compile. In your sample on GitHub though you have the correct tuple-constructing syntax.

So for both your first and second example in the question: add parentheses around the tuple values to construct it:

Some((Hello, RecvMode::Buffered(1024),
         scope.now() + Duration::new(10, 0)))

You want to pass a tuple to an Option-Enum, you have to first construct the tuple.

Upvotes: 2

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