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Adjusts bundle notation to read `class Bundle(val c: Context)` instead of
`class Bundle extends Macro`. This avoids calling compileLate in the
macro compiler and associated tooling problems.
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Performs the following renamings:
* scala.reflect.macros.BlackboxContext to scala.reflect.macros.blackbox.Context
* scala.reflect.macros.BlackboxMacro to scala.reflect.macros.blackbox.Macro
* scala.reflect.macros.WhiteboxContext to scala.reflect.macros.whitebox.Context
* scala.reflect.macros.WhiteboxMacro to scala.reflect.macros.whitebox.Macro
https://groups.google.com/forum/#!topic/scala-internals/MX40-dM28rk
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This is the first commit in the series. This commit only:
1) Splits Context into BlackboxContext and WhiteboxContext
2) Splits Macro into BlackboxMacro and WhiteboxMacro
3) Introduces the isBundle property in the macro impl binding
Here we just teach the compiler that macros can now be blackbox and whitebox,
without actually imposing any restrictions on blackbox macros. These
restrictions will come in subsequent commits.
For description and documentation of the blackbox/whitebox separation
see the official macro guide at the scaladoc website:
http://docs.scala-lang.org/overviews/macros/blackbox-whitebox.html
Some infrastructure work to make evolving macros easier:
compile partest-extras with quick so they can use latest library/reflect/...
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Previously it was enough to just extend scala.reflect.macros.Macro, which
created some loopholes, but now scalac enforces that bundles:
1) Are static (not necessarily top-level, but just static)
2) Are traits (objects shouldn't be bundles anyway, and classes bring
complications with their ctors which require special treatment in
generated classes, so why support them if they don't bring anything
new to the table?)
3) Are monomorphic (again, this brings unnecessary complications wrt
auxiliary code generation, so I don't see merit in supporting
polymorphic bundles, whatever that a polymorphic bundle could mean)
4) Don't provide concrete implementation for Macro.c (if they do then
what is the point?)
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