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

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This commit is contained in:
Arash Partow
2014-07-05 11:05:02 +10:00
parent 7a51d35c90
commit 1e90af47f9
2 changed files with 426 additions and 151 deletions
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141
exprtk_test.cpp
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@ -3281,6 +3281,10 @@ inline bool run_test10()
{
std::string expression_list[] =
{
"var x; 1",
"var x := 1; x",
"var x := 1; var y := 2; 1",
"var x := 1; var y := 2; x",
"var x:=6; var y:=4; x + -3 == 3",
"var x:=6; var y:=4; x - -3 == 9",
"var x:=6; var y:=4; x * -3 == -18",
@ -4520,28 +4524,64 @@ inline bool run_test19()
symbol_table.add_variable("u",u);
symbol_table.add_variable("v",v);
expression_t expression;
expression.register_symbol_table(symbol_table);
parser_t parser;
std::string expression_str = "f6(x,y,z,w,u,v) + 2";
const std::string expr_str_list[] =
{
"f0()",
"f1(x)",
"f2(x,x)",
"f3(x,x,x)",
"f4(x,x,x,x)",
"f5(x,x,x,x,x)",
"f6(x,x,x,x,x,x)",
"f2(x,y)",
"f3(x,y,z)",
"f4(x,y,z,w)",
"f5(x,y,z,w,u)",
"f6(x,y,z,w,u,v)"
};
const std::size_t expr_str_list_size = sizeof(expr_str_list) / sizeof(std::string);
if (!parser.compile(expression_str,expression))
const T result_list[] =
{
T(6 ),
T(35 ),
T(490 ),
T(13230 ),
T(436590 ),
T(22702680 ),
T(1543782240),
T(525 ),
T(15120 ),
T(533610 ),
T(29459430 ),
T(2122700580)
};
for (std::size_t i = 0; i < expr_str_list_size; ++i)
{
printf("run_test19() - Error: %s Expression: %s\n",
parser.error().c_str(),
expression_str.c_str());
return false;
}
expression_t expression;
expression.register_symbol_table(symbol_table);
T result = expression.value();
if (!parser.compile(expr_str_list[i],expression))
{
printf("run_test19() - Error: %s Expression: %s\n",
parser.error().c_str(),
expr_str_list[i].c_str());
return false;
}
if (T(2122700582) != result)
{
printf("run_test19() - Error in evaluation! (2) Expression: %s\n",
expression_str.c_str());
return false;
T result = expression.value();
if (result_list[i] != result)
{
printf("run_test19() - Error in evaluation! (2) Expression: %s Expected: %10.1f\tResult: %10.1f\n",
expr_str_list[i].c_str(),
result_list[i],
result);
return false;
}
}
}
@ -4557,6 +4597,13 @@ inline bool run_test19()
" is_prime_impl1(x,y - 1)))",
"x","y");
compositor
.add("is_prime1",
"if(frac(x) != 0, false, "
" if(x <= 0, false, "
" is_prime_impl1(x,min(x - 1,trunc(sqrt(x)) + 1))))",
"x");
compositor
.add("is_prime_impl2",
"switch "
@ -4567,13 +4614,6 @@ inline bool run_test19()
"} ",
"x","y");
compositor
.add("is_prime1",
"if(frac(x) != 0, false, "
" if(x <= 0, false, "
" is_prime_impl1(x,min(x - 1,trunc(sqrt(x)) + 1))))",
"x");
compositor
.add("is_prime2",
"switch "
@ -5063,6 +5103,60 @@ inline bool run_test19()
}
}
{
T x = T(0);
symbol_table_t symbol_table;
symbol_table.add_variable("x",x);
compositor_t compositor(symbol_table);
compositor
.add("fooboo",
" var x := input; "
" if (x > 0) "
" fooboo(x - 1) + x; "
" else "
" 0; ",
"input");
std::string expression_str = "fOoBoO(x)";
expression_t expression;
expression.register_symbol_table(symbol_table);
parser_t parser;
if (!parser.compile(expression_str,expression))
{
printf("run_test19() - Error: %s Expression: %s\n",
parser.error().c_str(),
expression_str.c_str());
return false;
}
T sum = T(0);
for (std::size_t i = 0; i < 100; ++i)
{
x = T(i);
sum += x;
T result = expression.value();
if (result != sum)
{
printf("run_test19() - FooBoo(%5.2f) Expected: %5.2f\tResult: %5.2f\n",
x,
sum,
result);
return false;
}
}
}
return true;
}
@ -5205,3 +5299,4 @@ int main()
return 0;
}