mirror of
https://github.com/triqs/dft_tools
synced 2024-12-26 14:23:38 +01:00
107 lines
3.4 KiB
C++
107 lines
3.4 KiB
C++
#include <triqs/clef/clef.hpp>
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#include <triqs/clef/io.hpp>
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using namespace triqs::clef;
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triqs::clef::placeholder <1> x_;
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triqs::clef::placeholder <2> y_;
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triqs::clef::placeholder <3> z_;
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namespace tql= triqs::clef;
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struct F1{
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double v;
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F1(double v_): v(v_){}
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F1(F1 const &) = delete; // non copyable
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double operator() (double x) const { return 10*x;}
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template< typename... Args>
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typename triqs::clef::result_of::make_expr_call<std::reference_wrapper<const F1>,Args...>::type
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operator()( Args&&... args ) const { return make_expr_call (std::ref(*this),args...);}
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template< typename... Args>
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typename triqs::clef::result_of::make_expr_call<std::reference_wrapper<F1>,Args...>::type
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operator()( Args&&... args ) { return make_expr_call (std::ref(*this),args...);}
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template<typename Fnt> friend void triqs_clef_auto_assign (F1 & x, Fnt f) { x.v++; std::cerr<< " called triqs_clef_auto_assign "<< f(100)<<std::endl;}
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friend std::ostream & operator<<(std::ostream & out, F1 const & x) { return out<<"F1";}
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};
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#define TEST(X) std::cout << BOOST_PP_STRINGIZE((X)) << " ---> "<< (X) <<std::endl;
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double x=1,y=2;
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template < typename Expr >
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void test1( Expr expr) {
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TEST(expr);
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TEST(eval( expr, x_=5));
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TEST(eval( expr, y_=5, x_=9));
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TEST(eval( expr, x_=5, y_=9));
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std::cout<<"-------------"<<std::endl;
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}
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template < typename Expr >
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void test2( Expr const & expr) {
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// std::cout << " type is " << triqs::utility::typeid_name(expr) << std::endl;
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std::cout<< " ------ start test2 -----------------"<<std::endl ;
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TEST(expr);
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//TEST(expr._eval( x_ =1, y_ =2));
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TEST(eval(expr,x_ =1, y_ =2));
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TEST(eval(expr,x_ =1));
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TEST(eval(expr,x_ =x_ + y_));
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//TEST(eval( eval ( expr,x_ =x_ + y_), x_ = 1, y_ = 2) );
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// std::cout<< " List of placeholder of the expression : "<< placeholder_list_as_string(expr) <<std::endl<<"-------------"<<std::endl;
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}
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int main() {
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F1 f(7);
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test1( x_/2.0) ;
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test1( 5*x_) ;
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test2(x_ + y_);
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test2(x_ + 2*y_);
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test2(x_ + 2*y_ + x_);
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test2(x_/2.0 + 2*y_);
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test2(x_/2.0 + 2*y_ - x_);
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auto expr = x_ + y_ + x_ + 2*x_ + x_ + 2*y_ - x_+ x_ + 4*y_;
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std::cout << ph_set<decltype(expr)>::value <<std::endl ;
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TEST(eval(expr,x_ =1, y_ =2));
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TEST(eval(expr,x_ =1));
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test2(x_ + 2*y_ - x_ + x_);
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test2( f(x_) );
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test2( f(x_) + 2*y_);
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test2( 1/f(x_) + 2*y_);
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//#define LONG
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//#define LONG2
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#ifdef LONG
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test2( x_ + 2*y_ + x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_);
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//test2( 1/f(x_) + 2*y_ + x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_);
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#endif
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#ifdef LONG2
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test2( 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_+ x_ + 2*x_ + 1/f(x_) + 2*y_ + x_ );
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#endif
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{
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// testing the LHS wrting on an object caught by ref
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F1 f(7);
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auto ex = f(x_);
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auto F = make_function(ex ,x_);
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std::cout << F(8) << std::endl;
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std::cout<< " f.v before assign "<<f.v<<" "<< std::endl;
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f(x_ ) << 8*x_ ;
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//f(x_ + y_) << 8*x_ ;// leads to a compile error as expected
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// test.cpp:129:14: error: no viable overloaded '='
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// f(x_ + y_) = 8*x_ ;
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// ~~~~~~~~~~ ^ ~~~~
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std::cout<< " f.v after assign "<<f.v<<" "<< std::endl;
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std::cout<<"-------------"<<std::endl;
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}
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}
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