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https://github.com/triqs/dft_tools
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19 lines
429 B
C++
19 lines
429 B
C++
#include "triqs/clef.hpp"
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namespace tql = triqs::clef;
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// This macro just prints its argument literaly, and then its value
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#define PRINT(X) std::cout << BOOST_PP_STRINGIZE((X)) << " ---> "<< (X) <<std::endl;
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int main() {
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tql::placeholder <1> x_;
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tql::placeholder <2> y_;
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PRINT ( x_ + 2*y_ );
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PRINT (eval(x_ + 2*y_ , x_ = 1, y_ = 2));
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PRINT (eval(x_ + 2*y_ , x_ = 1));
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PRINT (eval(x_ + 2*y_ , x_ = x_ + y_));
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}
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