Fast, indexed, foreach over an array, translated to a while loop.
Fast, indexed, foreach over an array, translated to a while loop.
arrayForeachWithIndex(as)((a, i) => println((a, i)))Translated to:
{
val $array = as
var $i = 0
val $len = array.length
while ($i < $len) {
val $a = array.apply($i)
f($a, $i);
$i += 1
}
}where the f is inlined.
Assert that cond is true.
Assert that cond is true. The tree of cond is used as the assertion message.
This call:
This call:
cfor(zero = 0)(okay = _ < 10, next = _ += 2) { println(_) }
Translates to:
val a = zero while (okay(a)) { act(a) a = next(a) }
where the bodies of okay, next, and act are inlined.
the tree of a after the typer, printed as source code.
Converts:
Converts:
iteratorForeach(iterator)(a => <body>)To:
while(iterator.hasNext) f(iterator.next())where f is inlined.
Automatic lens generation.
Automatic lens generation.
case class Foo(a: Int) val l = lens[Foo].a val foo = Foo(0) l._1(foo) // 0 l._2(foo, 1) // Foo(1)
log("".isEmpty) // prints: "".isEmpty = true
log("".isEmpty) // prints: "".isEmpty = true
Statically checked version of "some([Rr]egex)".r.
Statically checked version of "some([Rr]egex)".r.
Invalid regular expressions trigger a compile failure.
At runtime, the regex is parsed again.
scala> regex(".*") res0: scala.util.matching.Regex = .* scala> regex("{") <console>:11: error: exception during macro expansion: Illegal repetition { regex("{") ^
Trace execution on c, by printing the values of sub-expressions
to standard out.
Trace execution on c, by printing the values of sub-expressions
to standard out.