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std: add vaporware plans for floating point builtins

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This commit is contained in:
Andrew Kelley 2016-07-27 23:46:20 -07:00
parent 1fa0cabf9d
commit 711e3d71b9
1 changed files with 5 additions and 1 deletions
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6
std/rand.zig
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@ -77,8 +77,12 @@ pub struct Rand {
/// Get a floating point value in the range 0.0..1.0.
pub fn float(r: &Rand, inline T: type) -> T {
// TODO Implement this way instead:
// const int = @int_type(false, @sizeof(T) * 8);
// const mask = ((1 << @float_mantissa_bit_count(T)) - 1);
// const rand_bits = r.rng.scalar(int) & mask;
// return @float_compose(T, false, 0, rand_bits) - 1.0
const int_type = @int_type(false, @sizeof(T) * 8);
// TODO switch statement for constant values
const precision = if (T == f32) {
16777216
} else if (T == f64) {