Ich kompilierte den Code von kvb und Johannes antwortet.
Johannes antworten
let float32toFloat (x:int<'u>) : float<'u> =
x |> float |> LanguagePrimitives.FloatWithMeasure
.method public static float64 float32toFloat(int32 x) cil managed
{
// Code size 3 (0x3)
.maxstack 8
IL_0000: ldarg.0
IL_0001: conv.r8
IL_0002: ret
} // end of method Program::float32toFloat
kvb Antwort mit zusätzlichen Klammern.
let float_unit (x:int<'u>) : float<'u> = unbox (float x)
.method public static float64 float_unit(int32 x) cil managed
{
// Code size 13 (0xd)
.maxstack 8
IL_0000: ldarg.0
IL_0001: conv.r8
IL_0002: box [mscorlib]System.Double
IL_0007: unbox.any [mscorlib]System.Double
IL_000c: ret
} // end of method Program::float_unit
kvb Antwort
let float_unit (x:int<'u>) : float<'u> = unbox float x
.method public static float64 float_unit(int32 x) cil managed
{
// Code size 19 (0x13)
.maxstack 8
IL_0000: newobj instance void Program/[email protected]::.ctor()
IL_0005: call !!0 [FSharp.Core]Microsoft.FSharp.Core.LanguagePrimitives/IntrinsicFunctions::UnboxGeneric<class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,float64>>(object)
IL_000a: ldarg.0
IL_000b: tail.
IL_000d: callvirt instance !1 class [FSharp.Core]Microsoft.FSharp.Core.FSharpFunc`2<int32,float64>::Invoke(!0)
IL_0012: ret
} // end of method Program::float_unit
Ich habe die IL hinzugefügt. Wirf von int in float, um mit der Frage konsistent zu sein. http://stackoverflow.com/a/21802111/17919 – gradbot