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Allow for parse time evaluation of const values.

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The goal is to allow for more evaluation at parse time, in general, to
increase eval time performance.

 - Make AST_Node non-constructable except by derived classes.
 - Make data in AST_Node const (as much as possible).
 - Replace reflection "text = " with replace_child() (where the
   replacement must be with a new parse tree).
 - Evaluate floats, strings, ints, chars at parse time to avoid repeat
   evaluations (~10% speed up in loops in -O3)
This commit is contained in:
Jason Turner
2011-03-27 08:17:04 -06:00
parent bbe89e61bc
commit d6b8e32373
5 changed files with 84 additions and 51 deletions
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36
include/chaiscript/language/chaiscript_eval.hpp
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@@ -89,23 +89,30 @@ namespace chaiscript
struct Int_AST_Node : public AST_Node {
public:
Int_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::Int, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col), m_value(const_var(int(atoi(this->text.c_str())))) { }
virtual ~Int_AST_Node() {}
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &){
return const_var(int(atoi(this->text.c_str())));
return m_value;
}
private:
Boxed_Value m_value;
};
struct Float_AST_Node : public AST_Node {
public:
Float_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::Float, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col),
m_value(const_var(double(atof(this->text.c_str())))) { }
virtual ~Float_AST_Node() {}
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &){
return const_var(double(atof(this->text.c_str())));
return m_value;
}
private:
Boxed_Value m_value;
};
struct Id_AST_Node : public AST_Node {
@@ -472,7 +479,7 @@ namespace chaiscript
}
catch(const exception::dispatch_error &e){
t_ss.set_stack(prev_stack);
throw exception::eval_error(std::string(e.what()));
throw exception::eval_error(std::string(e.what()) + " for function: " + fun_name);
}
catch(detail::Return_Value &rv) {
t_ss.set_stack(prev_stack);
@@ -510,23 +517,30 @@ namespace chaiscript
struct Quoted_String_AST_Node : public AST_Node {
public:
Quoted_String_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::Quoted_String, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col),
m_value(const_var(this->text)) { }
virtual ~Quoted_String_AST_Node() {}
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &){
return const_var(this->text);
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &) {
return m_value;
}
private:
Boxed_Value m_value;
};
struct Single_Quoted_String_AST_Node : public AST_Node {
public:
Single_Quoted_String_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::Single_Quoted_String, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col),
m_value(const_var(char(this->text[0]))) { }
virtual ~Single_Quoted_String_AST_Node() {}
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &){
return const_var(char(this->text[0]));
return m_value;
}
private:
Boxed_Value m_value;
};
struct Lambda_AST_Node : public AST_Node {
@@ -656,7 +670,7 @@ namespace chaiscript
While_AST_Node(const std::string &t_ast_node_text = "", int t_id = AST_Node_Type::While, const boost::shared_ptr<std::string> &t_fname=boost::shared_ptr<std::string>(), int t_start_line = 0, int t_start_col = 0, int t_end_line = 0, int t_end_col = 0) :
AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~While_AST_Node() {}
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &t_ss){
virtual Boxed_Value eval(chaiscript::detail::Dispatch_Engine &t_ss) {
bool cond;
t_ss.new_scope();