xxq250/Nasal-Interpreter
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Valk Richard Li
2019-10-14 21:58:02 +08:00
committed by GitHub
parent 6135fd1de1
commit a89eaee28a
2 changed files with 92 additions and 37 deletions
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version1.0/ast.h
+66 -19
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@@ -7,6 +7,13 @@ class abstract_syntax_tree
int ast_node_type;
std::list<abstract_syntax_tree> statement_list;
std::list<abstract_syntax_tree> children;
// for definition and assignment
std::list<abstract_syntax_tree> var_list;
std::list<abstract_syntax_tree> var_changed_list;
std::list<abstract_syntax_tree> var_content_list;
// for number and string leaf
double var_number;
std::string var_string;
std::string id_name;
@@ -16,6 +23,11 @@ class abstract_syntax_tree
ast_node_type=0;
statement_list.clear();
children.clear();
var_list.clear();
var_changed_list.clear();
var_content_list.clear();
var_number=0;
var_string="";
id_name="ukn";
@@ -31,8 +43,22 @@ class abstract_syntax_tree
children.clear();
else
children=temp.children;
if(temp.var_list.empty())
var_list.clear();
else
var_list=temp.var_list;
if(temp.var_changed_list.empty())
var_changed_list.clear();
else
var_changed_list=temp.var_changed_list;
if(temp.var_content_list.empty())
var_content_list.clear();
else
var_content_list=temp.var_content_list;
var_number=temp.var_number;
var_string=temp.var_string;
id_name=temp.id_name;
}
abstract_syntax_tree& operator=(const abstract_syntax_tree temp)
{
@@ -53,17 +79,20 @@ class abstract_syntax_tree
{
statement_list.clear();
children.clear();
var_list.clear();
var_changed_list.clear();
var_content_list.clear();
return;
}
void print_ast_node(int tab_num)
{
std::string indent="";
for(int i=0;i<tab_num;++i)
std::cout<<" ";
indent+=" ";
std::cout<<indent;
if(ast_node_type==__number)
{
std::cout<<"[Number:";
std::cout<<var_number;
std::cout<<"]"<<std::endl;
std::cout<<"[Number:"<<var_number<<"]"<<std::endl;
return;
}
else if(ast_node_type==__string)
@@ -71,28 +100,37 @@ class abstract_syntax_tree
std::cout<<"[String:"<<var_string<<"]"<<std::endl;
return;
}
std::cout<<"{ [Type:";
else if(ast_node_type==__id)
{
std::cout<<"[Identifier:"<<id_name<<"]"<<std::endl;
return;
}
else if(ast_node_type==__definition)
{
std::cout<<"{ Definition"<<std::endl<<indent<<" [Var]"<<std::endl;
for(std::list<abstract_syntax_tree>::iterator i=var_list.begin();i!=var_list.end();++i)
i->print_ast_node(tab_num+1);
std::cout<<indent<<" [Content]"<<std::endl;
for(std::list<abstract_syntax_tree>::iterator i=var_content_list.begin();i!=var_content_list.end();++i)
i->print_ast_node(tab_num+1);
return;
}
std::cout<<"{ Type:";
print_token(ast_node_type);
std::cout<<"]"<<std::endl;
std::cout<<std::endl;
if(!children.empty())
{
for(int i=0;i<tab_num;++i)
std::cout<<" ";
std::cout<<" [Children]"<<std::endl;
std::cout<<indent<<" [Children]"<<std::endl;
for(std::list<abstract_syntax_tree>::iterator i=children.begin();i!=children.end();++i)
i->print_ast_node(tab_num+1);
}
if(!statement_list.empty())
{
for(int i=0;i<tab_num;++i)
std::cout<<" ";
std::cout<<" [Statement(s)]"<<std::endl;
std::cout<<indent<<" [Statement]"<<std::endl;
for(std::list<abstract_syntax_tree>::iterator i=statement_list.begin();i!=statement_list.end();++i)
i->print_ast_node(tab_num+1);
}
for(int i=0;i<tab_num;++i)
std::cout<<" ";
std::cout<<"}"<<std::endl;
std::cout<<indent<<"}"<<std::endl;
return;
}
// for root node
@@ -102,17 +140,26 @@ class abstract_syntax_tree
return;
}
// for definition
void set_definition_expr(std::string& name,abstract_syntax_tree var_content)
void set_definition_expr(std::list<abstract_syntax_tree> name_list,std::list<abstract_syntax_tree> var_content)
{
ast_node_type=__definition;
id_name=name;
children.push_back(var_content);
var_list=name_list;
var_content_list=var_content;
return;
}
// for assignment
void set_assignment_expr()
void set_assignment_expr(std::list<abstract_syntax_tree> to_be_changed,std::list<abstract_syntax_tree> var_content)
{
ast_node_type=__assignment;
var_changed_list=to_be_changed;
var_content_list=var_content;
return;
}
// for choose block
void set_choose_block(std::list<abstract_syntax_tree> if_else_statements)
{
ast_node_type=__ifelse;
statement_list=if_else_statements;
return;
}
// for if