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

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Arash Partow
2015-04-26 23:06:00 +10:00
parent 93ecfe2a1f
commit e39ec67df9
2 changed files with 89 additions and 19 deletions
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72
exprtk.hpp
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@ -10290,10 +10290,12 @@ namespace exprtk
typedef expression_node<T>* expression_ptr;
typedef results_context<T> results_context_t;
return_envelope_node(expression_ptr body, results_context_t& rc)
return_envelope_node(expression_ptr body,
results_context_t& rc, bool& rtrn_invoked)
: results_context_(&rc),
body_(body),
body_deletable_(branch_deletable(body_))
return_invoked_ (rtrn_invoked),
body_ (body),
body_deletable_ (branch_deletable(body_))
{}
~return_envelope_node()
@ -10308,12 +10310,14 @@ namespace exprtk
{
try
{
return_invoked_ = false;
results_context_->clear();
return body_->value();
}
catch(const return_exception&)
{
return_invoked_ = true;
return std::numeric_limits<T>::quiet_NaN();
}
}
@ -10326,6 +10330,7 @@ namespace exprtk
private:
results_context_t* results_context_;
bool& return_invoked_;
expression_ptr body_;
bool body_deletable_;
};
@ -13598,6 +13603,13 @@ namespace exprtk
return new node_type(t1,t2);
}
template <typename node_type,
typename T1, typename T2, typename T3>
inline expression_node<typename node_type::value_type>* allocate_crr(const T1& t1, T2& t2, T3& t3) const
{
return new node_type(t1,t2,t3);
}
template <typename node_type,
typename T1, typename T2>
inline expression_node<typename node_type::value_type>* allocate_rc(T1& t1, const T2& t2) const
@ -15411,14 +15423,16 @@ namespace exprtk
expression_holder()
: ref_count(0),
expr(0),
results_(0)
expr (0),
results (0),
return_invoked(false)
{}
expression_holder(expression_ptr e)
: ref_count(1),
expr(e),
results_(0)
expr (e),
results (0),
return_invoked(false)
{}
~expression_holder()
@ -15454,16 +15468,17 @@ namespace exprtk
}
}
if (results_)
if (results)
{
delete results_;
delete results;
}
}
std::size_t ref_count;
expression_ptr expr;
local_data_list_t local_data_list;
results_context_t* results_;
results_context_t* results;
bool return_invoked;
friend class function_compositor<T>;
};
@ -15583,8 +15598,8 @@ namespace exprtk
inline const results_context_t& results() const
{
if (expression_holder_->results_)
return (*expression_holder_->results_);
if (expression_holder_->results)
return (*expression_holder_->results);
else
{
static const results_context_t null_results;
@ -15592,6 +15607,11 @@ namespace exprtk
}
}
inline bool return_invoked() const
{
return (expression_holder_->return_invoked);
}
private:
inline symtab_list_t get_symbol_table_list() const
@ -15685,10 +15705,15 @@ namespace exprtk
{
if (rc)
{
expression_holder_->results_ = rc;
expression_holder_->results = rc;
}
}
inline bool& rtrn_invk_ref()
{
return expression_holder_->return_invoked;
}
expression_holder* expression_holder_;
symtab_list_t symbol_table_list_;
@ -16780,7 +16805,8 @@ namespace exprtk
: options_(options),
collect_variables_ ((options_ & e_ct_variables ) == e_ct_variables ),
collect_functions_ ((options_ & e_ct_functions ) == e_ct_functions ),
collect_assignments_((options_ & e_ct_assignments) == e_ct_assignments)
collect_assignments_((options_ & e_ct_assignments) == e_ct_assignments),
return_present_(false)
{}
template <typename Allocator,
@ -16833,6 +16859,7 @@ namespace exprtk
{
symbol_name_list_ .clear();
assignment_name_list_.clear();
return_present_ = false;
}
bool& collect_variables()
@ -16850,6 +16877,11 @@ namespace exprtk
return collect_assignments_;
}
bool return_present() const
{
return return_present_;
}
private:
inline void add_symbol(const std::string& symbol, const symbol_type st)
@ -16890,6 +16922,7 @@ namespace exprtk
bool collect_variables_;
bool collect_functions_;
bool collect_assignments_;
bool return_present_;
symbol_list_t symbol_name_list_;
symbol_list_t assignment_name_list_;
@ -17367,7 +17400,10 @@ namespace exprtk
{
if (state_.return_stmt_present)
{
e = expression_generator_.return_envelope(e,results_context_);
dec_.return_present_ = true;
e = expression_generator_
.return_envelope(e,results_context_,expr.rtrn_invk_ref());
}
expr.set_expression(e);
@ -24128,11 +24164,13 @@ namespace exprtk
}
}
inline expression_node_ptr return_envelope(expression_node_ptr body, results_context_t* rc)
inline expression_node_ptr return_envelope(expression_node_ptr body,
results_context_t* rc,
bool& return_invoked)
{
typedef details::return_envelope_node<Type> alloc_type;
return node_allocator_->allocate_cr<alloc_type>(body,(*rc));
return node_allocator_->allocate_crr<alloc_type>(body,(*rc),return_invoked);
}
inline expression_node_ptr vector_element(const std::string& symbol,