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Nasal-Interpreter
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Valk Richard Li 2019-10-29 23:35:18 +08:00 committed by GitHub
parent ab0e3c8447
commit 1ddbf43083
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1 changed files with 73 additions and 65 deletions
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138
version1.2/nasal_runtime.h
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@ -117,58 +117,10 @@ class var
}
};
class var_scope
{
private:
std::list<var> var_list;
public:
var_scope()
{
var_list.clear();
var null_var;
std::string null_name_str="$";
null_var.set_name(null_name_str);
var_list.push_back(null_var);
return;
}
var_scope(const var_scope& p)
{
var_list=p.var_list;
return;
}
void add_var(var& tmp)
{
for(auto i=var_list.begin();i!=var_list.end();++i)
if(i->get_name()==tmp.get_name())
{
std::cout<<">>[Runtime-error] redeclaration of '"<<tmp.get_name()<<"'."<<std::endl;
return;
}
var_list.push_back(tmp);
return;
}
void del_latest_var()
{
var_list.pop_back();
return;
}
std::list<var>& get_list()
{
return var_list;
}
var& search_var(std::string& str)
{
for(auto i=var_list.begin();i!=var_list.end();++i)
if(i->get_name()==str)
return *i;
std::cout<<">>[Runtime-error] '"<<str<<"' is not delclared in this scope."<<std::endl;
return *var_list.begin();
}
};
class var_scope_manager
{
private:
std::list<var_scope> scope_list;
std::list<std::list<var>> scope_list;
var error_var;
public:
var_scope_manager()
@ -185,8 +137,8 @@ class var_scope_manager
}
var& search_var(std::string str)
{
for(std::list<var_scope>::iterator i=scope_list.begin();i!=scope_list.end();++i)
for(std::list<var>::iterator j=i->get_list().begin();j!=i->get_list().end();++j)
for(std::list<std::list<var>>::iterator i=scope_list.begin();i!=scope_list.end();++i)
for(std::list<var>::iterator j=i->begin();j!=i->end();++j)
if(j->get_name()==str)
return *j;
std::cout<<">>[Runtime] could not find the var named '"<<str<<"' ."<<std::endl;
@ -194,18 +146,18 @@ class var_scope_manager
}
void add_var(var new_var)
{
for(std::list<var_scope>::iterator i=scope_list.begin();i!=scope_list.end();++i)
for(std::list<var>::iterator j=i->get_list().begin();j!=i->get_list().end();++j)
for(std::list<std::list<var>>::iterator i=scope_list.begin();i!=scope_list.end();++i)
for(std::list<var>::iterator j=i->begin();j!=i->end();++j)
if(j->get_name()==new_var.get_name())
{
std::cout<<">>[Runtime] redefinition of var '"<<new_var.get_name()<<"' ."<<std::endl;
std::cout<<">>[Runtime] redeclaration of var '"<<new_var.get_name()<<"' ."<<std::endl;
return;
}
if(!scope_list.empty())
{
std::list<var_scope>::iterator i=scope_list.end();
std::list<std::list<var>>::iterator i=scope_list.end();
--i;
i->get_list().push_back(new_var);
i->push_back(new_var);
}
else
std::cout<<">>[Runtime] empty scope list."<<std::endl;
@ -213,8 +165,8 @@ class var_scope_manager
}
void add_new_scope()
{
var_scope new_scope;
scope_list.push_back(new_scope);
std::list<var> new_list;
scope_list.push_back(new_list);
return;
}
void pop_last_scope()
@ -231,6 +183,7 @@ class nasal_runtime
{
private:
abstract_syntax_tree root;
var_scope_manager scope;
public:
nasal_runtime()
{
@ -254,7 +207,7 @@ class nasal_runtime
std::cout<<">>[Runtime] runtime got the ast-root: "<<((void *)&tree)<<"->"<<((void *)&root)<<"."<<std::endl;
return;
}
var run_definition(abstract_syntax_tree& tree);
void run_definition(abstract_syntax_tree& tree);
void run_assignment(abstract_syntax_tree& tree);
void run_loop(abstract_syntax_tree& tree);
void run_if_else(abstract_syntax_tree& tree);
@ -268,6 +221,7 @@ class nasal_runtime
void nasal_runtime::run_root(abstract_syntax_tree& tree)
{
scope.add_new_scope();
if(!tree.get_children().empty())
{
for(std::list<abstract_syntax_tree>::iterator i=tree.get_children().begin();i!=tree.get_children().end();++i)
@ -316,29 +270,80 @@ void nasal_runtime::run_root(abstract_syntax_tree& tree)
case __number:
case __string:
scalar_call(*i);
return;
break;
default:
std::cout<<">>[Debug] error occurred."<<std::endl;
scope.pop_last_scope();
return;
break;
}
}
}
scope.pop_last_scope();
return;
}
var nasal_runtime::run_definition(abstract_syntax_tree& tree)
void nasal_runtime::run_definition(abstract_syntax_tree& tree)
{
var new_var;
std::list<abstract_syntax_tree>::iterator iter=tree.get_children().begin();
new_var.set_name(iter->get_var_name());
std::string var_name=iter->get_var_name();
++iter;
if(iter==tree.get_children().end())
{
new_var.set_type(__null_type);
return new_var;
new_var.set_name(var_name);
scope.add_var(new_var);
return;
}
return new_var;
else
{
switch(iter->get_type())
{
case __add_operator:
case __sub_operator:
case __mul_operator:
case __div_operator:
case __link_operator:
case __and_operator:
case __or_operator:
case __nor_operator:
case __cmp_equal:
case __cmp_not_equal:
case __cmp_less:
case __cmp_less_or_equal:
case __cmp_more:
case __cmp_more_or_equal:
new_var=run_calculation(*iter);
break;
case __call_function:
new_var=run_function(*iter);
break;
case __id:
case __hash_search:
case __list_search:
new_var=identifier_call(*iter);
break;
case __number:
case __string:
new_var=scalar_call(*iter);
break;
case __function:
;
break;
case __list:
break;
case __hash:
break;
default:
std::cout<<">>[Debug] error occurred."<<std::endl;
return;
break;
}
new_var.set_name(var_name);
scope.add_var(new_var);
}
return;
}
void nasal_runtime::run_assignment(abstract_syntax_tree& tree)
{
@ -354,6 +359,9 @@ void nasal_runtime::run_if_else(abstract_syntax_tree& tree)
}
void nasal_runtime::run_block(abstract_syntax_tree& tree)
{
scope.add_new_scope();
scope.pop_last_scope();
return;
}