| Commit message (Collapse) | Author | Age | Files | Lines |
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1) First operand of boolean expression using `&&` or `||`. Second operands of
those boolean exprs were already treated specially here but handling for first
operands was missing.
2) Condition of `If`. Also added a test for guards.
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As described in the "Stackless Scala with Free Monads" paper
scala> import scala.util.control.TailCalls._
import scala.util.control.TailCalls._
scala> :paste
// Entering paste mode (ctrl-D to finish)
def isEven(xs: List[Int]): TailRec[Boolean] =
if (xs.isEmpty) done(true) else tailcall(isOdd(xs.tail))
def isOdd(xs: List[Int]): TailRec[Boolean] =
if (xs.isEmpty) done(false) else tailcall(isEven(xs.tail))
// Exiting paste mode, now interpreting.
isEven: (xs: List[Int])util.control.TailCalls.TailRec[Boolean]
isOdd: (xs: List[Int])util.control.TailCalls.TailRec[Boolean]
scala> isEven((1 to 100000).toList).result
res0: Boolean = true
scala> def fib(n: Int): TailRec[Int] =
| if (n < 2) done(n) else for {
| x <- tailcall(fib(n - 1))
| y <- tailcall(fib(n - 2))
| } yield (x + y)
fib: (n: Int)util.control.TailCalls.TailRec[Int]
scala> fib(40).result
res1: Int = 102334155
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This commit modifies the test and check file to use the new diff filter.
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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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Removing the code which has been deprecated since 2.8.0. Contributed by
Simon Ochsenreither, although deleting code is such fun one hesitates to
call it a contribution. Still, we will. Closes SI-4860, no review.
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[no content change] Fixed all SVN properties: mimes, EOL, executable. Id
expansion is consistently enabled for Scala/Java/C# sources in 'src/'
and consistently disabled and removed from everywhere else: there should
not be any dead Id tags anymore.
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- Improved tail call elimination to handle calls on a different
instance.
- Improved tail calls by skipping trivial arguments (when the argument to the call is the parameter itself)
- added preliminary support for incremental DFA.
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Fixed tail call elimination for calls in the rhs of boolean &&.
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Fixed bug with calls in tail position with final handlers.
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Removed old scala tests from new Scala core module.
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- Now works with the MSIL backend without modifications
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- Import java.lang.System.out and use out instead of System.out
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- Added 'import java.lang.System' to satisfy the .NET backend.
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