std.math.sign: Narrow integer return types to possible values
#23595
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jayschwa
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This may be a breaking change for callers that depend on the return type being identical to the input type. For example, `sign(i32) * i8 + i8` could now overflow. Callers can add an explicit type annotation to avoid that situation. If Zig ever allows small integer types to coerce to floats (see ziglang#18614), then it might make sense to always return an integer. In the meantime, I figured it would be too annoying for users dealing with floats.
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This may be a breaking change for callers that depend on the return type being identical to the input type. For example,
sign(i32) * i8 + i8could now overflow. Callers can add an explicit type annotation to avoid that situation.If Zig ever allows small integer types to coerce to floats (see #18614), then it might make sense to always return an integer. In the meantime, I figured it would be too annoying for users dealing with floats.