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front end optimization&stack overflow prompt

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change parameter type to avoid unnecessary copies of string.
change stack depth from 65536<<4 to 16+(65536<<2).
now you could know stack overflow when it happens
This commit is contained in:
Valk Richard Li
2021-06-07 23:53:43 +08:00
parent 9f2c31149a
commit 3deea632f8
10 changed files with 172 additions and 396 deletions
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nasal_import.h
+11 -21
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@@ -4,24 +4,24 @@
class nasal_import
{
private:
nasal_lexer import_lex;
nasal_parse import_par;
nasal_ast import_ast;
std::vector<std::string> filename_table;
int error;
void die(std::string,std::string);
nasal_lexer import_lex;
nasal_parse import_par;
nasal_ast import_ast;
std::vector<std::string> filename_table;
void die(std::string&,const char*);
bool check_import(nasal_ast&);
bool check_exist(std::string);
bool check_exist(std::string&);
void linker(nasal_ast&,nasal_ast&);
nasal_ast file_import(nasal_ast&);
nasal_ast load(nasal_ast&);
public:
int get_error();
int get_error(){return error;}
void link(nasal_ast&);
nasal_ast& get_root();
nasal_ast& get_root(){return import_ast;}
};
void nasal_import::die(std::string filename,std::string error_stage)
void nasal_import::die(std::string& filename,const char* error_stage)
{
++error;
std::cout<<">> [import] in <\""<<filename<<"\">: error(s) occurred in "<<error_stage<<".\n";
@@ -51,7 +51,7 @@ only this kind of node can be recognized as 'import':
return true;
}
bool nasal_import::check_exist(std::string filename)
bool nasal_import::check_exist(std::string& filename)
{
// avoid importing the same file
for(auto& fname:filename_table)
@@ -75,7 +75,7 @@ nasal_ast nasal_import::file_import(nasal_ast& node)
nasal_ast tmp(0,ast_root);
// get filename and set node to ast_null
std::string filename=node.get_children()[1].get_children()[0].get_str();
std::string& filename=node.get_children()[1].get_children()[0].get_str();
node.clear();
// avoid infinite loading loop
@@ -131,14 +131,4 @@ void nasal_import::link(nasal_ast& root)
return;
}
nasal_ast& nasal_import::get_root()
{
return import_ast;
}
int nasal_import::get_error()
{
return error;
}
#endif