mirror of
https://github.com/triqs/dft_tools
synced 2024-12-26 22:33:48 +01:00
edd1ff4529
A first general restructuration of the doc according to the pattern [tour|tutorial|reference]. In the reference part, objects are documented per topic. In each topic, [definition|c++|python|hdf5] (not yet implemented)
33 lines
914 B
C++
33 lines
914 B
C++
#include <triqs/clef.hpp>
|
|
#include <iostream>
|
|
|
|
// a simple foo function
|
|
double foo(double x) { return x / 2; }
|
|
int foo(int x) { return x * 2; }
|
|
|
|
// a more complex case : bar is already a template
|
|
// we have to disable it for CLEF expression to avoid ambiguity
|
|
|
|
// C++14 clean syntax will be (using concepts)
|
|
// template<NotClefExpression T>
|
|
// T bar (T const & x) { return x+1;}
|
|
|
|
// C++11 workaround
|
|
template <typename T> typename std::enable_if<!triqs::clef::is_clef_expression<T>::value, T>::type bar(T const& x) {
|
|
return x + 1;
|
|
}
|
|
|
|
namespace triqs {
|
|
namespace clef {
|
|
TRIQS_CLEF_MAKE_FNT_LAZY(foo);
|
|
TRIQS_CLEF_MAKE_FNT_LAZY(bar);
|
|
}
|
|
}
|
|
|
|
int main() {
|
|
triqs::clef::placeholder<3> x_;
|
|
std::cout << foo(2.0) << " " << eval(x_ + foo(x_), x_ = 3) << " " << eval(x_ + foo(x_), x_ = 3.5) << std::endl;
|
|
std::cout << bar(2.0) << " " << eval(x_ + bar(x_), x_ = 3) << " " << eval(x_ + bar(x_), x_ = 3.5) << std::endl;
|
|
}
|
|
|