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This commit is contained in:
Valk Richard Li
2019-11-09 17:03:54 +08:00
committed by GitHub
parent faf6800eb1
commit abae85d498
7 changed files with 156 additions and 22 deletions
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balloon/balloon_scope.h
+86 -12
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@@ -4,34 +4,108 @@
class balloon_scope
{
private:
std::list<var> scope;
var error_var;
std::list<var> global;
std::list<std::list<std::list<var> > > scope_list;
public:
void set_clear()
{
scope.clear();
global.clear();
scope_list.clear();
return;
}
bool search_var(std::string name)
{
for(std::list<var>::iterator i=scope.begin();i!=scope.end();++i)
if(i->get_name()==name)
return true;
if(!scope_list.empty())
{
std::list<std::list<var> >::iterator i=scope_list.back().end();
--i;
for(;;--i)
{
for(std::list<var>::iterator j=i->begin();j!=i->end();++j)
if(j->get_name()==name)
return true;
if(i==scope_list.back().begin())
break;
}
}
if(!global.empty())
{
for(std::list<var>::iterator i=global.begin();i!=global.end();++i)
if(i->get_name()==name)
return true;
}
return false;
}
void add_var(var t)
void add_new_var(var t)
{
scope.push_back(t);
if(!scope_list.empty())
{
std::list<std::list<var> >::iterator i=scope_list.back().end();
--i;
i->push_back(t);
return;
}
global.push_back(t);
return;
}
var& get_var(std::string name)
{
for(std::list<var>::iterator i=scope.begin();i!=scope.end();++i)
if(i->get_name()==name)
return *i;
std::cout<<">>[Runtime-error] \'"<<name<<"\' was not declared in this scope."<<std::endl;
if(!scope_list.empty())
{
std::list<std::list<var> >::iterator i=scope_list.back().end();
--i;
// get the last scope block(std::list<std::list<var> >)
for(;;--i)
{
for(std::list<var>::iterator j=i->begin();j!=i->end();++j)
if(j->get_name()==name)
return *j;
if(i==scope_list.back().begin())
break;
}
}
if(!global.empty())
{
for(std::list<var>::iterator i=global.begin();i!=global.end();++i)
if(i->get_name()==name)
return *i;
}
return error_var;
}
void add_new_block_scope()
{
std::list<std::list<var> > new_list;
scope_list.push_back(new_list);
return;
}
void add_new_local_scope()
{
if(!scope_list.empty())
{
std::list<std::list<std::list<var> > >::iterator i=scope_list.end();
--i;
std::list<var> new_list;
i->push_back(new_list);
}
return;
}
void pop_last_block_scope()
{
if(!scope_list.empty())
scope_list.pop_back();
return;
}
void pop_last_local_scope()
{
if(!scope_list.empty())
{
std::list<std::list<var> > temp=scope_list.back();
temp.pop_back();
}
return;
}
};
balloon_scope scope;
#endif