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| // g++ -Wall -Wextra -Wconversion -Wsign-conversion -Ofast -std=c++14 -pedantic -fopenmp main.cpp -o main && ./main
// g++ -Wall -Wextra -Wconversion -Wsign-conversion -Ofast -std=c++11 -pedantic -fopenmp main.cpp -o main && ./main
// g++ -Wall -Wextra -Wconversion -Wsign-conversion -Ofast -std=c++98 -pedantic -fopenmp main.cpp -o main && ./main
// g++ -Wall -Wextra -Wconversion -Wsign-conversion -Og -ggdb3 -std=c++14 -pedantic main.cpp -o main && valgrind ./main
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <limits>
#include <type_traits>
#include <memory>
// Tag (for operator overload)
class op_tag_t { };
// vector3D<span style="font-family: monospace; padding: 2px; background: #ddd; display: inline-block">^</span>class vector3D
{
public:tel que je l'ai utilisé
using tag = op_tag_t;
pas faire
public:
std::string name;
public:
vector3D(std::string const & name) : name(name) { }
// TODO
};
// Operations
template <class T0, class T1>
class op_t
{
public:
using tag = op_tag_t;
public:
T0 a;
T1 b;
public:
op_t(T0 const & a, T1 const & b) : a(a), b(b) { }
};
template <class T0, class T1>
class plus_t : public op_t<T0, T1>
{
public:
using op_t<T0, T1>::op_t;
};
template <class T0, class T1>
class cross_t : public op_t<T0, T1>
{
public:
using op_t<T0, T1>::op_t;
};
template <class T0, class T1>
class dot_t : public op_t<T0, T1>
{
public:
using op_t<T0, T1>::op_t;
};
// make_op & operators
template <class T0, class T1>
auto make_plus(T0 const & a, T1 const & b)
{
return plus_t<T0, T1>(a, b);
}
template <class T0, class T1>
auto make_cross(T0 const & a, T1 const & b)
{
return cross_t<T0, T1>(a, b);
}
template <class T0, class T1>
auto make_dot(T0 const & a, T1 const & b)
{
return dot_t<T0, T1>(a, b);
}
template <template <class T0, class T1> class OP_T, class T0, class T1>
auto make_op(T0 const & a, T1 const & b)
{
return OP_T<T0, T1>(a, b);
}
template
<
class T0, class T1,
class T0_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T0>::tag, op_tag_t>::value>,
class T1_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T1>::tag, op_tag_t>::value>
>
auto operator +(T0 const & a, T1 const & b)
{
return make_plus(a, b);
}
template
<
class T0, class T1,
class T0_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T0>::tag, op_tag_t>::value>,
class T1_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T1>::tag, op_tag_t>::value>
>
auto operator *(T0 const & a, T1 const & b)
{
return make_cross(a, b);
}
template
<
class T0, class T1,
class T0_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T0>::tag, op_tag_t>::value>,
class T1_is_op_t = std::enable_if_t<std::is_same<typename std::decay_t<T1>::tag, op_tag_t>::value>
>
auto operator ^(T0 const & a, T1 const & b)
{
return make_dot(a, b);
}
// Display
void display_op(vector3D const & v3D)
{
std::cout << v3D.name;
}
template <class T0, class T1>
void display_op(plus_t<T0, T1> const & op)
{
std::cout << "(";
display_op(op.a);
std::cout << " + ";
display_op(op.b);
std::cout << ")";
}
template <class T0, class T1>
void display_op(cross_t<T0, T1> const & op)
{
std::cout << "(";
display_op(op.a);
std::cout << " x ";
display_op(op.b);
std::cout << ")";
}
template <class T0, class T1>
void display_op(dot_t<T0, T1> const & op)
{
std::cout << "(";
display_op(op.a);
std::cout << " . ";
display_op(op.b);
std::cout << ")";
}
template <class T0, class T1, class T2>
void display_op(dot_t<plus_t<T0, T1>, T2> const & op)
{
display_op(make_plus(op.a.a, make_dot(op.a.b, op.b)));
}
template <class T0, class T1, class T2>
void display_op(dot_t<T2, plus_t<T0, T1>> const & op)
{
display_op(make_plus(make_dot(op.a, op.b.a), op.b.b));
}
int main()
{
vector3D a("a");
vector3D b("b");
vector3D c("c");
display_op(a + b ^ c); std::cout << std::endl; // (a + (b . c))
display_op(a ^ b + c); std::cout << std::endl; // ((a . b) + c)
return 0;
} |
