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

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Arash Partow
2016-09-29 08:53:05 +10:00
parent 41648363a0
commit 46b918c99a
2 changed files with 292 additions and 1 deletions
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139
exprtk_test.cpp
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@ -1796,6 +1796,7 @@ inline bool run_test01()
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) };
@ -1832,6 +1833,66 @@ inline bool run_test01()
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;
}
}
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::vector_view<T> v = exprtk::make_vector_view(v_ ,6);
exprtk::vector_view<T> index = exprtk::make_vector_view(index_,6);
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",
@ -6125,6 +6186,84 @@ inline bool run_test18()
return false;
}
{
bool failure = false;
typedef exprtk::symbol_table<T> symbol_table_t;
typedef exprtk::expression<T> expression_t;
typedef exprtk::parser<T> parser_t;
std::vector<T> v0 { 0, 0, 0, 0, 0, 0, 0 };
std::vector<T> v1 { 0, 2, 4, 6, 8, 10, 12 };
std::vector<T> v2 { 1, 3, 5, 7, 9, 11, 13 };
std::vector<T> v3 { 0, 1, 2, 3, 4, 5, 6 };
const std::string expr_string = "sum(v + 1)";
exprtk::vector_view<T> v = exprtk::make_vector_view(v0,v0.size());
symbol_table_t symbol_table;
symbol_table.add_vector("v",v);
expression_t expression;
expression.register_symbol_table(symbol_table);
parser_t parser;
if (!parser.compile(expr_string,expression))
{
printf("run_test18() - Error: %s\tExpression: %s\n",
parser.error().c_str(),
expr_string.c_str());
failure = true;
}
T sum = { T(0) };
sum = expression.value();
if (not_equal(sum,T(7)))
{
printf("run_test18() - Error in evaluation! (6) Expression: %s\n",
expr_string.c_str());
failure = true;
}
v.rebase(v1.data());
sum = expression.value();
if (not_equal(sum,T(49)))
{
printf("run_test18() - Error in evaluation! (7) Expression: %s\n",
expr_string.c_str());
failure = true;
}
v.rebase(v2.data());
sum = expression.value();
if (not_equal(sum,T(56)))
{
printf("run_test18() - Error in evaluation! (8) Expression: %s\n",
expr_string.c_str());
failure = true;
}
v.rebase(v3.data());
sum = expression.value();
if (not_equal(sum,T(28)))
{
printf("run_test18() - Error in evaluation! (9) Expression: %s\n",
expr_string.c_str());
failure = true;
}
if (failure)
return false;
}
return true;
}