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Scala does not seem to identify the type of byname members #7975

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scabug opened this issue Nov 17, 2013 · 3 comments
Closed

Scala does not seem to identify the type of byname members #7975

scabug opened this issue Nov 17, 2013 · 3 comments
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enhancement repl

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@scabug
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scabug commented Nov 17, 2013

This is trivial outside of side-effecting code but I'm surprised Scala doesn't identify g as => Int => String.

scala> object Foo { val f = {println("A"); (_:Int).toString}; def g = {println("B"); (_:Int).toString } }
defined module Foo

scala> Foo
A
res15: Foo.type = Foo$@6ea4ffc6

scala> :t Foo.f
Int => String

scala> :t Foo.g
Int => String

scala> val x = Foo.f
x: Int => String = <function1>

scala> val y = Foo.g
B
y: Int => String = <function1>

scala> val y = Foo.g
B
y: Int => String = <function1>
@scabug
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scabug commented Nov 17, 2013

Imported From: https://issues.scala-lang.org/browse/SI-7975?orig=1
Reporter: Lanny Ripple (lanny ripple)
Affected Versions: 2.10.3

@scabug
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scabug commented Nov 17, 2013

@paulp said:
That isn't a "by-name member", it's a method. There aren't any by-name members, there are only by-name parameters. Whether a member is a val or a def is not information which is encoded into its type.

@scabug
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scabug commented Nov 17, 2013

Lanny Ripple (lanny ripple) said:
Paul's comment clears this up.

@scabug scabug closed this as completed Nov 17, 2013
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