generic-library/ChaiScript
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Eliminate duplicate code and reduce Boxed_Value copies necessary

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This commit is contained in:
Jason Turner 2011-06-04 12:31:33 -06:00
parent 8fecf5c145
commit 1932cbfbbc
1 changed files with 19 additions and 120 deletions
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137
include/chaiscript/language/chaiscript_eval.hpp
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@ -44,29 +44,33 @@ namespace chaiscript
virtual ~Binary_Operator_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[2]->eval(t_ss));
Operators::Opers oper = Operators::to_operator(children[1]->text);
return do_oper(t_ss, Operators::to_operator(children[1]->text), children[1]->text,
this->children[0]->eval(t_ss),
this->children[2]->eval(t_ss));
}
protected:
Boxed_Value do_oper(chaiscript::detail::Dispatch_Engine &t_ss,
Operators::Opers t_oper, const std::string &t_oper_string, const Boxed_Value &t_lhs, const Boxed_Value &t_rhs)
{
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
if (t_oper != Operators::invalid && t_lhs.get_type_info().is_arithmetic() && t_rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
return Boxed_Numeric::do_oper(oper, retval, rhs);
return Boxed_Numeric::do_oper(t_oper, t_lhs, t_rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: " + children[1]->text);
throw exception::eval_error("Error with numeric operator calling: " + t_oper_string);
}
} else {
return t_ss.call_function(this->children[1]->text, retval, rhs);
return t_ss.call_function(t_oper_string, t_lhs, t_rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '" + this->children[1]->text + "'");
throw exception::eval_error("Can not find appropriate '" + t_oper_string + "'");
}
}
};
struct Error_AST_Node : public AST_Node {
@ -357,28 +361,7 @@ namespace chaiscript
Binary_Operator_AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Addition_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[1]->eval(t_ss));
Operators::Opers oper = Operators::sum;
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
retval = Boxed_Numeric::do_oper(oper, retval, rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: +");
}
} else {
retval = t_ss.call_function("+", retval, rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '+'");
}
return retval;
return do_oper(t_ss, Operators::sum, "+", this->children[0]->eval(t_ss), this->children[1]->eval(t_ss));
}
};
@ -390,28 +373,7 @@ namespace chaiscript
Binary_Operator_AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Subtraction_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[1]->eval(t_ss));
Operators::Opers oper = Operators::difference;
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
retval = Boxed_Numeric::do_oper(oper, retval, rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: -");
}
} else {
retval = t_ss.call_function("-", retval, rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '-'");
}
return retval;
return do_oper(t_ss, Operators::difference, "-", this->children[0]->eval(t_ss), this->children[1]->eval(t_ss));
}
};
@ -423,28 +385,7 @@ namespace chaiscript
Binary_Operator_AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Multiplication_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[1]->eval(t_ss));
Operators::Opers oper = Operators::product;
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
retval = Boxed_Numeric::do_oper(oper, retval, rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: *");
}
} else {
retval = t_ss.call_function("*", rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '*'");
}
return retval;
return do_oper(t_ss, Operators::product, "*", this->children[0]->eval(t_ss), this->children[1]->eval(t_ss));
}
};
@ -456,28 +397,7 @@ namespace chaiscript
Binary_Operator_AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Division_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[1]->eval(t_ss));
Operators::Opers oper = Operators::quotient;
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
retval = Boxed_Numeric::do_oper(oper, retval, rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: /");
}
} else {
retval = t_ss.call_function("/", retval, rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '/'");
}
return retval;
return do_oper(t_ss, Operators::quotient, "/", this->children[0]->eval(t_ss), this->children[1]->eval(t_ss));
}
};
@ -489,28 +409,7 @@ namespace chaiscript
Binary_Operator_AST_Node(t_ast_node_text, t_id, t_fname, t_start_line, t_start_col, t_end_line, t_end_col) { }
virtual ~Modulus_AST_Node() {}
virtual Boxed_Value eval_internal(chaiscript::detail::Dispatch_Engine &t_ss) {
Boxed_Value retval = this->children[0]->eval(t_ss);
Boxed_Value rhs(this->children[1]->eval(t_ss));
Operators::Opers oper = Operators::remainder;
try {
if (oper != Operators::invalid && retval.get_type_info().is_arithmetic() && rhs.get_type_info().is_arithmetic())
{
// If it's an arithmetic operation we want to short circuit dispatch
try{
retval = Boxed_Numeric::do_oper(oper, retval, rhs);
} catch (...) {
throw exception::eval_error("Error with numeric operator calling: %");
}
} else {
retval = t_ss.call_function("%", retval, rhs);
}
}
catch(const exception::dispatch_error &){
throw exception::eval_error("Can not find appropriate '%'");
}
return retval;
return do_oper(t_ss, Operators::remainder, "%", this->children[0]->eval(t_ss), this->children[1]->eval(t_ss));
}
};