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C++ Mathematical Expression Library (ExprTk) http://www.partow.net/programming/exprtk/index.html

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Arash Partow
2014-04-27 14:15:43 +10:00
parent 86514b460f
commit ab7c1677e5
4 changed files with 654 additions and 105 deletions
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74
exprtk_test.cpp
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@ -1521,7 +1521,9 @@ inline bool run_test01()
test_xy<T>("(x /= 2y) == (1/6)" ,T(1),T(3),T(1)),
test_xy<T>("for(i := 0; (i < 10);) { i += 1; }; x;" ,T(1),T(20),T( 1)),
test_xy<T>("for(i := 0; (i < 10) and (i != y); i+=2) { x += i; }; x;" ,T(1),T(20),T(21)),
test_xy<T>("for(i := 0; (i < 10) and (i != y);) { x += i; i+=2; }; x;",T(1),T(20),T(21))
test_xy<T>("for(i := 0; (i < 10) and (i != y);) { x += i; i+=2; }; x;",T(1),T(20),T(21)),
test_xy<T>("for(i := 0; (i < y); i += 1) { if (i <= (y / 2)) x += i; else break; }; x;" ,T(0),T(10),T(15)),
test_xy<T>("for(i := 0; (i < y); i += 1) { if (i <= (y / 2)) continue; else x += i; }; x;" ,T(0),T(10),T(30))
};
static const std::size_t test_list_size = sizeof(test_list) / sizeof(test_xy<T>);
@ -4317,6 +4319,39 @@ inline bool run_test19()
"} ",
"x");
compositor
.add("is_prime_impl4",
"switch "
"{ "
" case 1 == x : false; "
" case 2 == x : true; "
" case 3 == x : true; "
" case 5 == x : true; "
" case 7 == x : true; "
" case 0 == x % 2 : false; "
" default : "
" { "
" for (i := 3; i < y; i += 2) "
" { "
" if ((x % i) == 0) "
" break[false]; "
" else "
" true; "
" } "
" }; "
"} ",
"x","y");
compositor
.add("is_prime4",
"switch "
"{ "
" case x <= 0 : false; "
" case frac(x) != 0 : false; "
" default : is_prime_impl4(x,min(x - 1,trunc(sqrt(x)) + 1));"
"} ",
"x");
symbol_table_t& symbol_table = compositor.symbol_table();
symbol_table.add_constants();
symbol_table.add_variable("x",x);
@ -4324,7 +4359,8 @@ inline bool run_test19()
const std::string expression_str[] = {
"is_prime1(x)",
"is_prime2(x)",
"is_prime3(x)"
"is_prime3(x)",
"is_prime4(x)"
};
const std::size_t expression_count = sizeof(expression_str) / sizeof(std::string);
@ -4615,24 +4651,22 @@ inline bool run_test19()
compositor
.add("newton_sqrt_impl",
"switch "
"{ "
" case x < 0 : -inf; "
" case x == 0 : 0; "
" case x == 1 : 1; "
" default: "
" ~{ "
" z := 100; "
" y := x / 2; "
" while ((z := (z - 1)) > 0) "
" { "
" if (equal(y^2,x)) "
" y := y + (z := 0); "
" else "
" y := (1 / 2) * (y + (x / y)); "
" } "
" }; "
"} ",
"switch "
"{ "
" case x < 0 : -inf; "
" case x == 0 : 0; "
" case x == 1 : 1; "
" default: "
" ~{ "
" z := 100; "
" y := x / 2; "
" repeat "
" y := (1 / 2) * (y + (x / y)); "
" if (equal(y * y,x)) "
" break[y]; "
" until ((z -= 1) <= 0); "
" }; "
"} ",
"x","y","z");
compositor