xxq250/Nasal-Interpreter
1
0
Fork 1
mirror of https://github.com/ValKmjolnir/Nasal-Interpreter.git synced 2026-07-22 10:58:47 +08:00
Code Issues Actions Packages Projects Releases Wiki Activity

add lib load code to automatically load lib.nas

Browse Source
This commit is contained in:
ValKmjolnir
2022-04-21 19:45:16 +08:00
parent cd2736b924
commit 0d49a3c3f9
1 changed files with 44 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
nasal_import.h
+44 -1
View File
@@ -4,15 +4,17 @@
class nasal_import
{
private:
bool lib_loaded;
nasal_err& nerr;
std::vector<std::string> files;
bool check_import(const nasal_ast&);
bool check_exist(const std::string&);
void linker(nasal_ast&,nasal_ast&&);
nasal_ast file_import(nasal_ast&);
nasal_ast lib_import();
nasal_ast load(nasal_ast&,uint16_t);
public:
nasal_import(nasal_err& e):nerr(e){}
nasal_import(nasal_err& e):lib_loaded(false),nerr(e){}
void link(nasal_parse&,const std::string&);
const std::vector<std::string>& get_file() const {return files;}
};
@@ -73,9 +75,50 @@ nasal_ast nasal_import::file_import(nasal_ast& node)
return load(tmp,files.size()-1);
}
nasal_ast nasal_import::lib_import()
{
nasal_lexer lex(nerr);
nasal_parse par(nerr);
const std::vector<std::string> libpath=
{
"lib.nas",
"stl/lib.nas"
};
std::string filename;
for(auto& i:libpath)
{
std::ifstream fin(i);
if(!fin.fail())
{
filename=i;
fin.close();
break;
}
fin.close();
}
// avoid infinite loading loop
if(check_exist(filename))
return {0,ast_root};
// start importing...
lex.scan(filename);
par.compile(lex);
nasal_ast tmp=std::move(par.ast());
// check if tmp has 'import'
return load(tmp,files.size()-1);
}
nasal_ast nasal_import::load(nasal_ast& root,uint16_t fileindex)
{
nasal_ast new_root(0,ast_root);
if(!lib_loaded)
{
linker(new_root,lib_import());
lib_loaded=true;
}
for(auto& i:root.child())
if(check_import(i))
linker(new_root,file_import(i));