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Num.powInt: panic on overflow

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shua 2024-11-30 11:17:31 +01:00
parent 364249a29d
commit 6dfa458e6c
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3 changed files with 28 additions and 19 deletions
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16
crates/compiler/builtins/bitcode/src/num.zig
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@ -110,7 +110,21 @@ pub fn exportNumToFloatCast(comptime T: type, comptime F: type, comptime name: [
pub fn exportPow(comptime T: type, comptime name: []const u8) void {
comptime var f = struct {
fn func(base: T, exp: T) callconv(.C) T {
return std.math.pow(T, base, exp);
switch (@typeInfo(T)) {
// std.math.pow can handle ints via powi, but it turns any errors to unreachable
// we want to catch overflow and report a proper error to the user
.Int => {
if (std.math.powi(T, base, exp)) |value| {
return value;
} else |err| switch (err) {
error.Overflow => roc_panic("Integer raised to power overflowed!", 0),
error.Underflow => return 0,
}
},
else => {
return std.math.pow(T, base, exp);
},
}
}
}.func;
@export(f, .{ .name = name ++ @typeName(T), .linkage = .Strong });