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Implements SIP 16: Self-cleaning macros: http://bit.ly/wjjXTZ
Features:
* Macro defs
* Reification
* Type tags
* Manifests aliased to type tags
* Extended reflection API
* Several hundred tests
* 1111 changed files
Not yet implemented:
* Reification of refined types
* Expr.value splicing
* Named and default macro expansions
* Intricacies of interaction between macros and implicits
* Emission of debug information for macros (compliant with JSR-45)
Dedicated to Yuri Alekseyevich Gagarin
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possible, just far enough to avoid all kinds of undesirable consequences
which accompany the preservation of too much type information. (The
problems are akin to inferring the singleton type too freely.)
// Example of code which did not compile, but now does class A class
B[T <: A](cons: T)
object C extends B(new A {})
Closes #4110, #3048. I already ran this by moors, so review by odersky.
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"I invite everyone to change this rule, and observe what breaks!"
This much beloved comment from #1208 has been on my radar for two years.
The worm has turned. Closes #1208. The inferred type of an object is now
Foo.type instead of "object Foo". What once was this:
scala> val x: Map[Int, Singleton] = Map(1 -> None)
<console>:5: error: type mismatch;
found : (Int, object None)
required: (Int, Singleton)
Now exudes a pleasing aura of workingness:
scala> val x: Map[Int, Singleton] = Map(1 -> None)
x: Map[Int,Singleton] = Map(1 -> None)
No review.
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Updated manifests.check to reflect the new way 'void' is represented.
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