mirror of
https://github.com/pybind/pybind11.git
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154 lines
7.9 KiB
C++
154 lines
7.9 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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#include <type_traits>
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#if defined(__clang__)
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# pragma clang diagnostic ignored "-Wunsequenced" // multiple unsequenced modifications to 'self' (when using def(py::self OP Type()))
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#endif
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NAMESPACE_BEGIN(pybind11)
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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, op_sub, op_mul, op_div, op_mod, op_divmod, op_pow, op_lshift,
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op_rshift, op_and, op_xor, op_or, op_neg, op_pos, op_abs, op_invert,
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op_int, op_long, op_float, op_str, op_cmp, op_gt, op_ge, op_lt, op_le,
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op_eq, op_ne, op_iadd, op_isub, op_imul, op_idiv, op_imod, op_ilshift,
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op_irshift, op_iand, op_ixor, op_ior, op_complex, op_bool, op_nonzero,
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op_repr, op_truediv
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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> 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> struct op_ {
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template <typename Base, typename Holder, typename... Extra> void execute(pybind11::class_<Base, Holder> &class_, const Extra&... extra) const {
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typedef typename std::conditional<std::is_same<L, self_t>::value, Base, L>::type L_type;
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typedef typename std::conditional<std::is_same<R, self_t>::value, Base, R>::type R_type;
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typedef op_impl<id, ot, Base, L_type, R_type> op;
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class_.def(op::name(), &op::execute, extra...);
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}
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template <typename Base, typename Holder, typename... Extra> void execute_cast(pybind11::class_<Base, Holder> &class_, const Extra&... extra) const {
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typedef typename std::conditional<std::is_same<L, self_t>::value, Base, L>::type L_type;
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typedef typename std::conditional<std::is_same<R, self_t>::value, Base, R>::type R_type;
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typedef op_impl<id, ot, Base, L_type, R_type> op;
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class_.def(op::name(), &op::execute_cast, 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> 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> 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> 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> 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> 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> 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> 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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#if PY_MAJOR_VERSION >= 3
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PYBIND11_BINARY_OPERATOR(truediv, rtruediv, operator/, l / r)
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#else
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PYBIND11_BINARY_OPERATOR(div, rdiv, operator/, l / r)
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#endif
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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(idiv, 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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PYBIND11_UNARY_OPERATOR(abs, abs, std::abs(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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NAMESPACE_END(detail)
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using detail::self;
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NAMESPACE_END(pybind11)
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