Matcher operator overloads for nil(-like) literals

[jmper1]

How about if we define a constant (global only to Nimble):

let Nil: NilLiteralType = NilLiteral()

where NilLiteralType and NilLiteral are defined as:

protocol NilLiteralType {}
struct NilLiteral: NilLiteralType {}

and override the equality operators:

func ==<T>(lhs: Expectation<T>, nilLiteral: NilLiteralType)
{
  lhs.to(beNil())
}

func !=<T>(lhs: Expectation<T>, nilLiteral: NilLiteralType)
{
  lhs.toNot(beNil())
}

so that expressions like the following are possible:

expect(foo) == Nil
expect(bar) != Nil

I can create a PR if you don't think this is a stupid idea.

[jeffh]

That sounds good to me. Just make sure it honors Nimble's accidental nil-ness behavior for all other equalities.

• Jeff

Sent from my iPhone

On Oct 31, 2015, at 7:02 PM, Jerson Michael Perpetua notifications@github.com wrote:

How about if we define a constant (global only to Nimble):

let Nil: NilLiteralType = NilLiteral()
where NilLiteralType and NilLiteral are defined as:

protocol NilLiteralType {}
struct NilLiteral: NilLiteralType {}
and override the equality operators:

func ==(lhs: Expectation, nilLiteral: NilLiteralType)
{
lhs.to(beNil())
}

func !=(lhs: Expectation, nilLiteral: NilLiteralType)
{
lhs.toNot(beNil())
}
so that expressions like the following are possible:

expect(foo) == Nil
expect(bar) != Nil
I can create a PR if you don't think this is a stupid idea.

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