Conversion
A class for implicit values that can serve as implicit conversions The implicit resolution algorithm will act as if there existed the additional implicit definition:
def $implicitConversion[T, U](x: T)(c: Conversion[T, U]): U = c(x)
However, the presence of this definition would slow down implicit search since
its outermost type matches any pair of types. Therefore, implicit search
contains a special case in Implicits#discardForView
which emulates the
conversion in a more efficient way.
Note that this is a SAM class - function literals are automatically converted
to the Conversion
values.
Also note that in bootstrapped dotty, Predef.<:<
should inherit from
Conversion
. This would cut the number of special cases in discardForView
from two to one.
The Conversion
class can also be used to convert explicitly, using
the convert
extension method.
- Source:
- Conversion.scala
Value members
Abstract methods
Inherited methods
Composes two instances of Function1 in a new Function1, with this function applied first.
Composes two instances of Function1 in a new Function1, with this function applied first.
- Type parameters:
- A
the result type of function
g
- Value parameters:
- g
a function R => A
- Returns:
a new function
f
such thatf(x) == g(apply(x))
- Inherited from:
- Function1
- Source:
- Function1.scala
Composes two instances of Function1 in a new Function1, with this function applied last.
Composes two instances of Function1 in a new Function1, with this function applied last.
- Type parameters:
- A
the type to which function
g
can be applied
- Value parameters:
- g
a function A => T1
- Returns:
a new function
f
such thatf(x) == apply(g(x))
- Inherited from:
- Function1
- Source:
- Function1.scala
Extensions
Extensions
x.convert
converts a value x
of type T
to type U
x.convert
converts a value x
of type T
to type U
- Source:
- Conversion.scala