192d648b2SVijay Khemka /* 292d648b2SVijay Khemka * This define will disable the ability for expressions to have comments. 392d648b2SVijay Khemka * Expressions that have comments when parsed with a build that has this 492d648b2SVijay Khemka * option, will result in a compilation failure. 592d648b2SVijay Khemka */ 692d648b2SVijay Khemka // #define exprtk_disable_comments 792d648b2SVijay Khemka /* 892d648b2SVijay Khemka * This define will disable the loop-wise 'break' and 'continue' 992d648b2SVijay Khemka * capabilities. Any expression that contains those keywords will result 1092d648b2SVijay Khemka * in a compilation failure. 1192d648b2SVijay Khemka */ 1292d648b2SVijay Khemka #define exprtk_disable_break_continue 1392d648b2SVijay Khemka /* 1492d648b2SVijay Khemka * This define will disable the short-circuit '&' (and) and '|' (or) 1592d648b2SVijay Khemka * operators 1692d648b2SVijay Khemka */ 1792d648b2SVijay Khemka #define exprtk_disable_sc_andor 1892d648b2SVijay Khemka /* 1992d648b2SVijay Khemka * This define will disable all enhanced features such as strength 2092d648b2SVijay Khemka * reduction and special function optimisations and expression specific 2192d648b2SVijay Khemka * type instantiations. This feature will reduce compilation times and 2292d648b2SVijay Khemka * binary sizes but will also result in massive performance degradation 2392d648b2SVijay Khemka * of expression evaluations. 2492d648b2SVijay Khemka */ 2592d648b2SVijay Khemka #define exprtk_disable_enhanced_features 2692d648b2SVijay Khemka /* 2792d648b2SVijay Khemka * This define will disable all string processing capabilities. Any 2892d648b2SVijay Khemka * expression that contains a string or string related syntax will result 2992d648b2SVijay Khemka * in a compilation failure. 3092d648b2SVijay Khemka */ 3192d648b2SVijay Khemka #define exprtk_disable_string_capabilities 3292d648b2SVijay Khemka 3392d648b2SVijay Khemka #define exprtk_disable_rtl_io_file 3492d648b2SVijay Khemka #define exprtk_disable_return_statement 3592d648b2SVijay Khemka #define exprtk_disable_rtl_io 3692d648b2SVijay Khemka #define exprtk_disable_superscalar_unroll 3792d648b2SVijay Khemka 3892d648b2SVijay Khemka /* include main exprtk header library */ 3992d648b2SVijay Khemka #include <exprtk.hpp> 400ab9d838SLei YU 410ab9d838SLei YU #include <cmath> 420ab9d838SLei YU #include <limits> 430ab9d838SLei YU #include <numeric> 440ab9d838SLei YU 450ab9d838SLei YU /* For floating types. (float, double, long double et al) */ 460ab9d838SLei YU template <typename T> 470ab9d838SLei YU struct FuncMaxIgnoreNaN : public exprtk::ivararg_function<T> 480ab9d838SLei YU { 490ab9d838SLei YU FuncMaxIgnoreNaN() 500ab9d838SLei YU { 510ab9d838SLei YU exprtk::set_min_num_args(*this, 2); 520ab9d838SLei YU exprtk::set_max_num_args(*this, 255); 530ab9d838SLei YU } 540ab9d838SLei YU 550ab9d838SLei YU inline T operator()(const std::vector<T>& argList) 560ab9d838SLei YU { 570ab9d838SLei YU return std::reduce(std::begin(argList), std::end(argList), 580ab9d838SLei YU std::numeric_limits<double>::quiet_NaN(), 590ab9d838SLei YU [](auto a, auto b) { 600ab9d838SLei YU if (std::isnan(b)) 610ab9d838SLei YU { 620ab9d838SLei YU return a; 630ab9d838SLei YU } 640ab9d838SLei YU if (std::isnan(a)) 650ab9d838SLei YU { 660ab9d838SLei YU return b; 670ab9d838SLei YU } 680ab9d838SLei YU return std::max(a, b); 690ab9d838SLei YU }); 700ab9d838SLei YU } 710ab9d838SLei YU }; 7287d35115SLei YU 7387d35115SLei YU template <typename T> 7487d35115SLei YU struct FuncSumIgnoreNaN : public exprtk::ivararg_function<T> 7587d35115SLei YU { 7687d35115SLei YU inline T operator()(const std::vector<T>& argList) 7787d35115SLei YU { 7887d35115SLei YU return std::reduce(std::begin(argList), std::end(argList), 7987d35115SLei YU std::numeric_limits<double>::quiet_NaN(), 8087d35115SLei YU [](auto a, auto b) { 8187d35115SLei YU if (std::isnan(b)) 8287d35115SLei YU { 8387d35115SLei YU return a; 8487d35115SLei YU } 8587d35115SLei YU if (std::isnan(a)) 8687d35115SLei YU { 8787d35115SLei YU return b; 8887d35115SLei YU } 8987d35115SLei YU return a + b; 9087d35115SLei YU }); 9187d35115SLei YU } 9287d35115SLei YU }; 93*c77b6b3fSLei YU 94*c77b6b3fSLei YU template <typename T> 95*c77b6b3fSLei YU struct FuncIfNan : public exprtk::ifunction<T> 96*c77b6b3fSLei YU { 97*c77b6b3fSLei YU using exprtk::ifunction<T>::operator(); 98*c77b6b3fSLei YU 99*c77b6b3fSLei YU FuncIfNan() : exprtk::ifunction<T>(2) {} 100*c77b6b3fSLei YU 101*c77b6b3fSLei YU inline T operator()(const T& arg1, const T& arg2) 102*c77b6b3fSLei YU { 103*c77b6b3fSLei YU if (std::isnan(arg1)) 104*c77b6b3fSLei YU { 105*c77b6b3fSLei YU return arg2; 106*c77b6b3fSLei YU } 107*c77b6b3fSLei YU else 108*c77b6b3fSLei YU { 109*c77b6b3fSLei YU return arg1; 110*c77b6b3fSLei YU } 111*c77b6b3fSLei YU } 112*c77b6b3fSLei YU }; 113