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Do not round a**b to infinity

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... instead, just calculate the value unless it is too big.
Also, this change raises an ArgumentError if it is expected to exceed
16 GB in a 64-bit environment.

(It is possible to calculate it straightforward, but it would likely be
out-of-memory, so I didn't think it would make sense.)

[Feature #20811]
This commit is contained in:
Yusuke Endoh 2024-11-08 14:46:35 +09:00
parent f7b334e002
commit 45cd4a8296
Notes: git 2024-11-08 10:49:14 +00:00
7 changed files with 122 additions and 61 deletions
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3
rational.c
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@ -1048,8 +1048,7 @@ rb_rational_pow(VALUE self, VALUE other)
}
}
else if (RB_BIGNUM_TYPE_P(other)) {
rb_warn("in a**b, b may be too big");
return rb_float_pow(nurat_to_f(self), other);
rb_raise(rb_eArgError, "exponent is too large");
}
else if (RB_FLOAT_TYPE_P(other) || RB_TYPE_P(other, T_RATIONAL)) {
return rb_float_pow(nurat_to_f(self), other);