generic-library/ChaiScript
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Reduce overhead necessary for internal_eval. Desirable due to the use of "eval" during cloning operations

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This commit is contained in:
Jason Turner 2009-09-22 01:58:16 +00:00
parent d3cdd6959d
commit 443902f787
1 changed files with 34 additions and 16 deletions
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50
include/chaiscript/language/chaiscript_engine.hpp
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@ -201,10 +201,13 @@ namespace chaiscript
/**
* Evaluates the given string in by parsing it and running the results through the evaluator
*/
Boxed_Value do_eval(const std::string &input, const std::string &filename = "__EVAL__") {
Boxed_Value do_eval(const std::string &input, const std::string &filename = "__EVAL__", bool internal = false) {
ChaiScript_Parser parser;
engine.sync_cache();
if (!internal)
{
engine.sync_cache();
}
//debug_print(tokens);
Boxed_Value value;
@ -212,26 +215,41 @@ namespace chaiscript
// Keep a cache of all loaded filenames and use the char * from this cache to pass
// to the parser. This is so that the parser does not have the overhead of passing
// around and copying strings
//
//
if (filename != "__EVAL__")
{
#ifndef CHAISCRIPT_NO_THREADS
boost::unique_lock<boost::shared_mutex> l(mutex);
boost::unique_lock<boost::shared_mutex> l(mutex);
#endif
loaded_files.insert(filename);
try {
if (parser.parse(input, loaded_files.find(filename)->c_str())) {
loaded_files.insert(filename);
try {
if (parser.parse(input, loaded_files.find(filename)->c_str())) {
#ifndef CHAISCRIPT_NO_THREADS
l.unlock();
l.unlock();
#endif
//parser.show_match_stack();
value = eval_token<Eval_Engine>(engine, parser.ast());
//parser.show_match_stack();
value = eval_token<Eval_Engine>(engine, parser.ast());
}
}
catch (const Return_Value &rv) {
value = rv.retval;
}
} else {
try {
if (parser.parse(input, loaded_files.find(filename)->c_str())) {
//parser.show_match_stack();
value = eval_token<Eval_Engine>(engine, parser.ast());
}
}
catch (const Return_Value &rv) {
value = rv.retval;
}
}
catch (const Return_Value &rv) {
value = rv.retval;
}
engine.sync_cache();
if (!internal)
{
engine.sync_cache();
}
return value;
}
@ -240,7 +258,7 @@ namespace chaiscript
* Evaluates the given boxed string, used during eval() inside of a script
*/
const Boxed_Value internal_eval(const std::vector<Boxed_Value> &vals) {
return do_eval(boxed_cast<std::string>(vals.at(0)));
return do_eval(boxed_cast<std::string>(vals.at(0)), "__EVAL__", true);
}
void use(const std::string &filename)