3671582c15
The purpose of this is: * Only one way to do things * Changing a function with void return type to return a possible error becomes a 1 character change, subtly encouraging people to use errors. See #632 Here are some imperfect sed commands for performing this update: remove arrow: ``` sed -i 's/\(\bfn\b.*\)-> /\1/g' $(find . -name "*.zig") ``` add void: ``` sed -i 's/\(\bfn\b.*\))\s*{/\1) void {/g' $(find ../ -name "*.zig") ``` Some cleanup may be necessary, but this should do the bulk of the work.
38 lines
801 B
Zig
38 lines
801 B
Zig
const std = @import("../index.zig");
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const math = std.math;
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const assert = std.debug.assert;
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pub fn signbit(x: var) bool {
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const T = @typeOf(x);
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return switch (T) {
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f32 => signbit32(x),
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f64 => signbit64(x),
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else => @compileError("signbit not implemented for " ++ @typeName(T)),
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};
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}
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fn signbit32(x: f32) bool {
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const bits = @bitCast(u32, x);
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return bits >> 31 != 0;
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}
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fn signbit64(x: f64) bool {
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const bits = @bitCast(u64, x);
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return bits >> 63 != 0;
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}
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test "math.signbit" {
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assert(signbit(f32(4.0)) == signbit32(4.0));
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assert(signbit(f64(4.0)) == signbit64(4.0));
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}
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test "math.signbit32" {
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assert(!signbit32(4.0));
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assert(signbit32(-3.0));
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}
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test "math.signbit64" {
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assert(!signbit64(4.0));
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assert(signbit64(-3.0));
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}
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