Accept dictionary literals for HTTPHeaders

[johnno1962]

Just an idea - be able to provide dictionary literals where an HTTPHeader struct is expected. I could add the conformance in an extension if you prefer.

Motivation:

A convenience/shorthand for developers.

Modifications:

Add conformance to ExpressibleByDictionaryLiteral along with implementation.

Result:

The following is would then be legal in Vapor:

        return HTTPResponse(status: .ok, headers: ["Content-Type": "text/html"],
                            body: "<table border=1><tr><td><i>Hello</i>, plugin!")

[swift-nio-bot]

Can one of the admins verify this patch?

[swift-nio-bot]

Can one of the admins verify this patch?

[swift-nio-bot]

Can one of the admins verify this patch?

[swift-nio-bot]

Can one of the admins verify this patch?

[johnno1962]

Maybe you can close this as it is already in https://github.com/vapor/http/blob/master/Sources/HTTPKit/Message/HTTPHeaders.swift#L73. Be good if it made it up stream though. Vapor compiles with both conformances present.

[weissi]

thanks, that works for me :)

[weissi]

Thanks! That looks pretty much perfect. But we do need a (very simple) test though. One test is good enough but it's important to run this code.

[johnno1962]

I’ve pushed an amend with a test. The test is… untested.

[weissi]

Thanks! Lgtm

[weissi]

@swift-nio-bot test this please

[johnno1962]

Thanks @weissi!