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abacus: bignum: add unary operators

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This commit is contained in:
Bruno BELANYI 2021-08-20 17:27:56 +02:00
parent 7c1b3d302e
commit 0a5fb471e4
3 changed files with 29 additions and 0 deletions
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12
src/bignum/bignum.hh
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@ -10,6 +10,16 @@ class BigNum {
public:
explicit BigNum(std::int64_t number);
friend BigNum operator+(BigNum const& rhs) {
return rhs;
}
friend BigNum operator-(BigNum const& rhs) {
auto ret = rhs;
ret.flip_sign();
return ret;
}
friend bool operator==(BigNum const& lhs, BigNum const& rhs) {
return lhs.equal(rhs);
}
@ -35,6 +45,8 @@ public:
}
private:
void flip_sign();
bool equal(BigNum const& rhs) const;
bool less_than(BigNum const& rhs) const;