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no side effects on math procs, fixes #2458

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Simon Hafner 2015-04-04 16:44:59 -05:00
commit 4ea5f3e6e6
1 changed files with 7 additions and 0 deletions
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7
lib/pure/math.nim
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@ -152,6 +152,7 @@ proc randomize*(seed: int) {.benign.}
## Note: Does nothing for the JavaScript target, ## Note: Does nothing for the JavaScript target,
## as JavaScript does not support this. ## as JavaScript does not support this.
{.push noSideEffect.}
when not defined(JS): when not defined(JS):
proc sqrt*(x: float): float {.importc: "sqrt", header: "<math.h>".} proc sqrt*(x: float): float {.importc: "sqrt", header: "<math.h>".}
## computes the square root of `x`. ## computes the square root of `x`.
@ -273,6 +274,8 @@ else:
var y = exp(2.0*x) var y = exp(2.0*x)
return (y-1.0)/(y+1.0) return (y-1.0)/(y+1.0)
{.pop.}
proc `mod`*(x, y: float): float = proc `mod`*(x, y: float): float =
result = if y == 0.0: x else: x - y * (x/y).floor result = if y == 0.0: x else: x - y * (x/y).floor
@ -370,3 +373,7 @@ when isMainModule and not defined(JS):
for i in 0..SIZE-1: for i in 0..SIZE-1:
assert buf[i] == random(high(int)), "non deterministic random seeding" assert buf[i] == random(high(int)), "non deterministic random seeding"
echo "random values equal after reseeding" echo "random values equal after reseeding"
# Check for no side effect annotation
proc mySqrt(num: float): float {.noSideEffect.} =
return sqrt(num)