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202 lines
8.8 KiB
C++
202 lines
8.8 KiB
C++
/*
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pybind11/operator.h: Metatemplates for operator overloading
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Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.ch>
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All rights reserved. Use of this source code is governed by a
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BSD-style license that can be found in the LICENSE file.
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*/
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#pragma once
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#include "pybind11.h"
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PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
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PYBIND11_NAMESPACE_BEGIN(detail)
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/// Enumeration with all supported operator types
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enum op_id : int {
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op_add,
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op_sub,
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op_mul,
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op_div,
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op_mod,
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op_divmod,
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op_pow,
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op_lshift,
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op_rshift,
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op_and,
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op_xor,
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op_or,
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op_neg,
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op_pos,
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op_abs,
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op_invert,
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op_int,
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op_long,
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op_float,
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op_str,
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op_cmp,
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op_gt,
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op_ge,
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op_lt,
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op_le,
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op_eq,
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op_ne,
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op_iadd,
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op_isub,
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op_imul,
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op_idiv,
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op_imod,
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op_ilshift,
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op_irshift,
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op_iand,
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op_ixor,
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op_ior,
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op_complex,
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op_bool,
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op_nonzero,
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op_repr,
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op_truediv,
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op_itruediv,
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op_hash
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};
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enum op_type : int {
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op_l, /* base type on left */
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op_r, /* base type on right */
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op_u /* unary operator */
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};
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struct self_t {};
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static const self_t self = self_t();
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/// Type for an unused type slot
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struct undefined_t {};
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/// Don't warn about an unused variable
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inline self_t __self() { return self; }
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/// base template of operator implementations
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template <op_id, op_type, typename B, typename L, typename R>
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struct op_impl {};
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/// Operator implementation generator
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template <op_id id, op_type ot, typename L, typename R>
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struct op_ {
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template <typename Class, typename... Extra>
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void execute(Class &cl, const Extra &...extra) const {
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using Base = typename Class::type;
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using L_type = conditional_t<std::is_same<L, self_t>::value, Base, L>;
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using R_type = conditional_t<std::is_same<R, self_t>::value, Base, R>;
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using op = op_impl<id, ot, Base, L_type, R_type>;
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cl.def(op::name(), &op::execute, is_operator(), extra...);
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}
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template <typename Class, typename... Extra>
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void execute_cast(Class &cl, const Extra &...extra) const {
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using Base = typename Class::type;
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using L_type = conditional_t<std::is_same<L, self_t>::value, Base, L>;
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using R_type = conditional_t<std::is_same<R, self_t>::value, Base, R>;
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using op = op_impl<id, ot, Base, L_type, R_type>;
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cl.def(op::name(), &op::execute_cast, is_operator(), extra...);
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}
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};
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#define PYBIND11_BINARY_OPERATOR(id, rid, op, expr) \
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template <typename B, typename L, typename R> \
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struct op_impl<op_##id, op_l, B, L, R> { \
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static char const *name() { return "__" #id "__"; } \
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static auto execute(const L &l, const R &r) -> decltype(expr) { return (expr); } \
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static B execute_cast(const L &l, const R &r) { return B(expr); } \
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}; \
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template <typename B, typename L, typename R> \
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struct op_impl<op_##id, op_r, B, L, R> { \
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static char const *name() { return "__" #rid "__"; } \
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static auto execute(const R &r, const L &l) -> decltype(expr) { return (expr); } \
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static B execute_cast(const R &r, const L &l) { return B(expr); } \
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}; \
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inline op_<op_##id, op_l, self_t, self_t> op(const self_t &, const self_t &) { \
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return op_<op_##id, op_l, self_t, self_t>(); \
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} \
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template <typename T> \
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op_<op_##id, op_l, self_t, T> op(const self_t &, const T &) { \
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return op_<op_##id, op_l, self_t, T>(); \
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} \
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template <typename T> \
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op_<op_##id, op_r, T, self_t> op(const T &, const self_t &) { \
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return op_<op_##id, op_r, T, self_t>(); \
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}
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#define PYBIND11_INPLACE_OPERATOR(id, op, expr) \
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template <typename B, typename L, typename R> \
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struct op_impl<op_##id, op_l, B, L, R> { \
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static char const *name() { return "__" #id "__"; } \
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static auto execute(L &l, const R &r) -> decltype(expr) { return expr; } \
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static B execute_cast(L &l, const R &r) { return B(expr); } \
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}; \
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template <typename T> \
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op_<op_##id, op_l, self_t, T> op(const self_t &, const T &) { \
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return op_<op_##id, op_l, self_t, T>(); \
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}
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#define PYBIND11_UNARY_OPERATOR(id, op, expr) \
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template <typename B, typename L> \
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struct op_impl<op_##id, op_u, B, L, undefined_t> { \
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static char const *name() { return "__" #id "__"; } \
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static auto execute(const L &l) -> decltype(expr) { return expr; } \
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static B execute_cast(const L &l) { return B(expr); } \
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}; \
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inline op_<op_##id, op_u, self_t, undefined_t> op(const self_t &) { \
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return op_<op_##id, op_u, self_t, undefined_t>(); \
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}
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PYBIND11_BINARY_OPERATOR(sub, rsub, operator-, l - r)
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PYBIND11_BINARY_OPERATOR(add, radd, operator+, l + r)
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PYBIND11_BINARY_OPERATOR(mul, rmul, operator*, l *r)
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PYBIND11_BINARY_OPERATOR(truediv, rtruediv, operator/, l / r)
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PYBIND11_BINARY_OPERATOR(mod, rmod, operator%, l % r)
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PYBIND11_BINARY_OPERATOR(lshift, rlshift, operator<<, l << r)
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PYBIND11_BINARY_OPERATOR(rshift, rrshift, operator>>, l >> r)
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PYBIND11_BINARY_OPERATOR(and, rand, operator&, l &r)
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PYBIND11_BINARY_OPERATOR(xor, rxor, operator^, l ^ r)
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PYBIND11_BINARY_OPERATOR(eq, eq, operator==, l == r)
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PYBIND11_BINARY_OPERATOR(ne, ne, operator!=, l != r)
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PYBIND11_BINARY_OPERATOR(or, ror, operator|, l | r)
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PYBIND11_BINARY_OPERATOR(gt, lt, operator>, l > r)
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PYBIND11_BINARY_OPERATOR(ge, le, operator>=, l >= r)
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PYBIND11_BINARY_OPERATOR(lt, gt, operator<, l < r)
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PYBIND11_BINARY_OPERATOR(le, ge, operator<=, l <= r)
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// PYBIND11_BINARY_OPERATOR(pow, rpow, pow, std::pow(l, r))
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PYBIND11_INPLACE_OPERATOR(iadd, operator+=, l += r)
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PYBIND11_INPLACE_OPERATOR(isub, operator-=, l -= r)
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PYBIND11_INPLACE_OPERATOR(imul, operator*=, l *= r)
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PYBIND11_INPLACE_OPERATOR(itruediv, operator/=, l /= r)
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PYBIND11_INPLACE_OPERATOR(imod, operator%=, l %= r)
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PYBIND11_INPLACE_OPERATOR(ilshift, operator<<=, l <<= r)
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PYBIND11_INPLACE_OPERATOR(irshift, operator>>=, l >>= r)
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PYBIND11_INPLACE_OPERATOR(iand, operator&=, l &= r)
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PYBIND11_INPLACE_OPERATOR(ixor, operator^=, l ^= r)
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PYBIND11_INPLACE_OPERATOR(ior, operator|=, l |= r)
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PYBIND11_UNARY_OPERATOR(neg, operator-, -l)
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PYBIND11_UNARY_OPERATOR(pos, operator+, +l)
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// WARNING: This usage of `abs` should only be done for existing STL overloads.
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// Adding overloads directly in to the `std::` namespace is advised against:
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// https://en.cppreference.com/w/cpp/language/extending_std
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PYBIND11_UNARY_OPERATOR(abs, abs, std::abs(l))
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PYBIND11_UNARY_OPERATOR(hash, hash, std::hash<L>()(l))
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PYBIND11_UNARY_OPERATOR(invert, operator~, (~l))
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PYBIND11_UNARY_OPERATOR(bool, operator!, !!l)
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PYBIND11_UNARY_OPERATOR(int, int_, (int) l)
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PYBIND11_UNARY_OPERATOR(float, float_, (double) l)
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#undef PYBIND11_BINARY_OPERATOR
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#undef PYBIND11_INPLACE_OPERATOR
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#undef PYBIND11_UNARY_OPERATOR
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PYBIND11_NAMESPACE_END(detail)
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using detail::self;
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// Add named operators so that they are accessible via `py::`.
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using detail::hash;
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PYBIND11_NAMESPACE_END(PYBIND11_NAMESPACE)
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