diff options
| -rw-r--r-- | lib/pure/random.nim | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/pure/random.nim b/lib/pure/random.nim index 01ea9c845..e565fccf8 100644 --- a/lib/pure/random.nim +++ b/lib/pure/random.nim @@ -110,7 +110,7 @@ proc random*[T](a: openArray[T]): T {.deprecated.} = ## Use ``rand`` instead. result = a[random(a.low..a.len)] -proc rand*(r: var Rand; max: int): int {.benign.} = +proc rand*(r: var Rand; max: Natural): int {.benign.} = ## Returns a random number in the range 0..max. The sequence of ## random number is always the same, unless `randomize` is called ## which initializes the random number generator with a "random" @@ -128,7 +128,7 @@ proc rand*(max: int): int {.benign.} = ## number, i.e. a tickcount. rand(state, max) -proc rand*(r: var Rand; max: float): float {.benign.} = +proc rand*(r: var Rand; max: range[0.0 .. high(float)]): float {.benign.} = ## Returns a random number in the range 0..max. The sequence of ## random number is always the same, unless `randomize` is called ## which initializes the random number generator with a "random" @@ -218,4 +218,17 @@ when isMainModule: doAssert rand(0) == 0 doAssert rand("a") == 'a' + when compileOption("rangeChecks"): + try: + discard rand(-1) + doAssert false + except RangeError: + discard + + try: + discard rand(-1.0) + doAssert false + except RangeError: + discard + main() |