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Use concrete expression

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This commit is contained in:
Koki Fushimi 2018-06-05 02:32:39 +09:00
commit 090ffa3869
1 changed files with 6 additions and 7 deletions
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13
lib/pure/math.nim
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@ -148,14 +148,13 @@ else: # JS
proc ln*(x: float32): float32 {.importc: "Math.log", nodecl.} proc ln*(x: float32): float32 {.importc: "Math.log", nodecl.}
proc ln*(x: float64): float64 {.importc: "Math.log", nodecl.} proc ln*(x: float64): float64 {.importc: "Math.log", nodecl.}
proc log*[X, B: SomeFloat](x: X, base: B): auto = proc log*[T: SomeFloat](x, base: T): T =
## Computes the logarithm ``base`` of ``x`` ## Computes the logarithm ``base`` of ``x``
when B is float64 or X is float64: ln(x) / ln(base)
var r: float64 proc log*(x: float64, base: float32): float64 =
else: ln(x) / ln(base)
var r: float32 proc log*(x: float32, base: float64): float64 =
r = ln(x) / ln(base) ln(x) / ln(base)
return r
when not defined(JS): # C when not defined(JS): # C
proc log10*(x: float32): float32 {.importc: "log10f", header: "<math.h>".} proc log10*(x: float32): float32 {.importc: "log10f", header: "<math.h>".}