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

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Arash Partow
2016-10-18 13:17:34 +11:00
parent 165e10a5f0
commit 3209f74e7f
3 changed files with 26 additions and 7 deletions
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30
exprtk.hpp
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@ -2436,9 +2436,10 @@ namespace exprtk
/*
Permit symbols that contain a 'dot'
Allowed : abc.xyz, a123.xyz, abc.123, abc_.xyz a123_.xyz abc._123
Disallowed: abc.<white-space>, abc.<eof>, abc.<operator +,-,*,/...>
Disallowed: .abc, abc.<white-space>, abc.<eof>, abc.<operator +,-,*,/...>
*/
if (
(s_itr_ != initial_itr) &&
!is_end(s_itr_ + 1) &&
details::is_letter_or_digit(*s_itr_ + 1) &&
('_' != (*s_itr_ + 1))
@ -17071,12 +17072,14 @@ namespace exprtk
for (std::size_t i = 1; i < symbol.size(); ++i)
{
if (
(!details::is_letter(symbol[i])) &&
(!details:: is_digit(symbol[i])) &&
!details::is_letter_or_digit(symbol[i]) &&
('_' != symbol[i])
)
{
return false;
if (('.' == symbol[i]) && (i < (symbol.size() - 1)))
continue;
else
return false;
}
}
}
@ -17095,12 +17098,14 @@ namespace exprtk
for (std::size_t i = 1; i < symbol.size(); ++i)
{
if (
(!details::is_letter(symbol[i])) &&
(!details:: is_digit(symbol[i])) &&
!details::is_letter_or_digit(symbol[i]) &&
('_' != symbol[i])
)
{
return false;
if (('.' == symbol[i]) && (i < (symbol.size() - 1)))
continue;
else
return false;
}
}
}
@ -17518,8 +17523,19 @@ namespace exprtk
{
return details::is_function(expr.control_block_->expr);
}
static inline bool is_null(const expression<T>& expr)
{
return details::is_null_node(expr.control_block_->expr);
}
};
template <typename T>
inline bool is_valid(const expression<T>& expr)
{
return !expression_helper<T>::is_null(expr);
}
namespace parser_error
{
enum error_mode