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Ever wonder why `identity("")` typechecks to
`scala.this.Predef.identity("")`?
It turns out that `mkAttributedRef` was importing
`q"$scalaPackageClass.this.Predef._"` for all these years,
rather than `q"$scalaModule.Predef._"`.
This commit makes `mkAttributedRef` special case static owners
by referring the the corresponding module, instead.
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1) Deprecates much of Predef and scala.Console, especially:
- the read* methods (see below)
- the set{Out,Err,In} methods (see SI-4793)
2) Removed long-deprecated:
- Predef#exit
- Predef#error should have gone, but could not due to sbt
At least the whole source base has now been future-proofed
against the eventual removal of Predef#error.
The low justification for the read* methods should be readily
apparent: they are little used and have no call to be in global
namespace, especially given their weird ad hoc semantics and
unreasonably tempting names such as readBoolean().
3) Segregated the deprecated elements in Predef from the part
which still thrives.
4) Converted all the standard Predef implicits into implicit
classes, value classes where possible:
- ArrowAssoc, Ensuring, StringFormat, StringAdd, RichException (value)
- SeqCharSequence, ArrayCharSequence (non-value)
Non-implicit deprecated stubs prop up the names of the
formerly converting methods.
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Again, this is not a fatal error, so it should end with an Error,
and it should subclass not Throwable, but Exception.
Also moved the exception outside the cake to simplify error handling,
along the same lines of what've been done for parsing and reification
exceptions.
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This brings all the files into line with the .gitattributes
settings, which should henceforth be automatically maintained
by git.
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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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