Interop with GMP

Raw access

BigInteger exposes:

const mpz_class& raw() const noexcept;
mpz_class& raw() noexcept;

Use it when you need direct GMP calls.

BigDecimal exposes:

const mpz_class& unscaled() const noexcept;
mpq_class toRational() const;

BigFloat is internally an mpf_class. It does not expose raw() in the current header, but you can convert to string or use mpf_class constructor if you already have one.

BigRational wraps mpq_class internally and formats through get_str().

Thread safety

GMP objects are not inherently thread-safe when the same object is mutated concurrently. Treat these types as regular C++ value types: don't race on shared instances.