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

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Arash Partow
2016-10-09 16:31:52 +11:00
parent b3f673f75e
commit 9a269be6a4
3 changed files with 194 additions and 43 deletions
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126
exprtk_test.cpp
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@ -6336,6 +6336,132 @@ 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;
std::vector<T> s;
#define pb(v,N) \
v.push_back(T(N)); \
pb(v0,0) pb(v0,1) pb(v0,2) pb(v0,3) pb(v0,4)
pb(v0,5) pb(v0,6) pb(v0,7) pb(v0,8) pb(v0,9)
pb(s, 3) pb(s, 6) pb(s, 9) pb(s,12)
pb(s,15) pb(s,18) pb(s,21)
#undef pb
const std::string expr_string = "var i := 0; var j := 1; var k := 2; v[i] + v[j] + v[k]";
exprtk::vector_view<T> v = exprtk::make_vector_view(v0,4);
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;
}
for (std::size_t i = 0; i < v0.size() - 4; ++i)
{
v.rebase(v0.data() + i);
T sum = expression.value();
if (not_equal(sum,s[i]))
{
printf("run_test18() - Error in evaluation! (8) Expression: %s Expected: %5.3f Computed: %5.3f\n",
expr_string.c_str(),
s[i],
sum);
failure = true;
}
}
if (failure)
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;
std::vector<T> s;
#define pb(v,N) \
v.push_back(T(N)); \
pb(v0,0) pb(v0,1) pb(v0,2) pb(v0,3) pb(v0,4)
pb(v0,5) pb(v0,6) pb(v0,7) pb(v0,8) pb(v0,9)
pb(s, 3) pb(s, 6) pb(s, 9) pb(s,12)
pb(s,15) pb(s,18) pb(s,21)
#undef pb
const std::string expr_string = "var i := 0; v[i + 0] + v[i + 1] + v[i + 2]";
exprtk::vector_view<T> v = exprtk::make_vector_view(v0,4);
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;
}
for (std::size_t i = 0; i < v0.size() - 4; ++i)
{
v.rebase(v0.data() + i);
T sum = expression.value();
if (not_equal(sum,s[i]))
{
printf("run_test18() - Error in evaluation! (9) Expression: %s Expected: %5.3f Computed: %5.3f\n",
expr_string.c_str(),
s[i],
sum);
failure = true;
}
}
if (failure)
return false;
}
return true;
}