xfygogo/exprtk
1
0
Fork 0
mirror of https://github.com/ArashPartow/exprtk.git synced 2025-06-12 16:27:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source
This commit is contained in:
Arash Partow
2014-04-21 11:16:33 +10:00
parent afc7c074fa
commit a2d640ed78
5 changed files with 1136 additions and 238 deletions
Download Patch File Download Diff File Expand all files Collapse all files

79
exprtk_test.cpp
View File

@ -1684,6 +1684,85 @@ inline bool run_test01()
}
}
{
const std::string expr_list[] =
{
"((v[1] + x) == (x + v[1]))",
"((v[0] += x) == x)",
"((v[0] += x + y) == (x + y))",
"((v[0] -= x) == -x)",
"((v[0] -= (x + y)) == -(x + y))",
"((v[1] + v[2]) == (v[3 - 1] + v[2 * 1/2]))",
"(v[v[1]] == v[1])",
"(v[1] += v[1]) == v[1 + 1]",
"((v[i[1]] + x) == (x + v[i[1]]))",
"((v[i[0]] += x) == x)",
"((v[i[0]] += x + y) == (x + y))",
"((v[i[0]] -= x) == -x)",
"((v[i[0]] -= (x + y)) == -(x + y))",
"((v[i[1]] + v[2]) == (v[i[3] - i[1]] + v[i[2] * 1/2]))",
"(v[v[i[1]]] == v[i[1]])",
"(v[i[1]] += v[i[1]]) == v[i[1] + 1]"
};
const std::size_t expr_list_size = sizeof(expr_list) / sizeof(std::string);
const std::size_t rounds = 60;
for (std::size_t r = 0; r < rounds; ++r)
{
bool loop_result = true;
for (std::size_t i = 0; i < expr_list_size; ++i)
{
T v[] = { T(0.0), T(1.1), T(2.2), T(3.3), T(4.4), T(5.5) };
T index[] = { T(0) , T(1) , T(2) , T(3) , T(4) , T(5) };
T x = T(6.6);
T y = T(7.7);
T z = T(8.8);
exprtk::symbol_table<T> symbol_table;
symbol_table.add_variable("x",x);
symbol_table.add_variable("y",y);
symbol_table.add_variable("z",z);
symbol_table.add_vector ("v",v);
symbol_table.add_vector ("i",index);
exprtk::expression<T> expression;
expression.register_symbol_table(symbol_table);
{
exprtk::parser<T> parser;
if (!parser.compile(expr_list[i],expression))
{
printf("run_test01() - Error: %s Expression: %s\n",
parser.error().c_str(),
expr_list[i].c_str());
loop_result = false;
continue;
}
}
T result = expression.value();
if (not_equal(result,T(1)))
{
printf("run_test01() - Computation Error: Expression: [%s]\tExpected: %19.15f\tResult: %19.15f\n",
expr_list[i].c_str(),
(double)1.0,
(double)result);
loop_result = false;
}
}
if (!loop_result)
{
return false;
}
}
}
return true;
}