xxq250/Nasal-Interpreter
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This commit is contained in:
Valk Richard Li
2020-03-29 18:50:28 +08:00
committed by GitHub
parent ad18e76c10
commit 1273342db0
6 changed files with 187 additions and 45 deletions
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version2.0/main.cpp
+17 -18
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@@ -1,24 +1,26 @@
#include "nasal.h"
// source code will be put in resource
resource_file resource;
resource_file resource;
// source code will be generated to tokens in lexer
nasal_lexer lexer;
nasal_lexer lexer;
// token list will be checked in parser and output the abstract syntax tree
nasal_parse parser;
nasal_parse parser;
// libroot stores the ast of lib file
abstract_syntax_tree libroot;
// root stores the ast of source code
abstract_syntax_tree root;
// executable_ast generates libroot and root together
// this ast will be sent into nasal runtime
abstract_syntax_tree executable_ast;
// main process is running here
nasal_runtime runtime;
// command is used in main()
std::string command;
int main()
{
// this curve looks really cool
std::cout<<" __ _ "<<std::endl;
std::cout<<" /\\ \\ \\__ _ ___ __ _| | "<<std::endl;
std::cout<<" / \\/ / _` / __|/ _` | | "<<std::endl;
@@ -54,9 +56,9 @@ int main()
std::cout<<">> [ast ] check the abstract syntax tree."<<std::endl;
std::cout<<">> [run ] run code."<<std::endl;
std::cout<<">> [logo ] print logo of nasal ."<<std::endl;
std::cout<<">> [info ] print lexer,parser and ast on screen."<<std::endl;
std::cout<<">> [exit ] quit nasal interpreter."<<std::endl;
}
// clear the window
else if(command=="cls")
{
#ifdef _WIN32
@@ -69,6 +71,7 @@ int main()
system("clear");
#endif
}
// del all the source codes and asts
else if(command=="del")
{
resource.delete_all_source();
@@ -78,6 +81,7 @@ int main()
executable_ast.set_clear();
std::cout<<">> [Delete] complete."<<std::endl;
}
// add lib
else if(command=="lib")
{
libroot.set_clear();
@@ -102,10 +106,10 @@ int main()
lexer.delete_all_tokens();
parser.delete_all_elements();
}
// print source codes
else if(command=="rs")
{
resource.print_resource();
}
// print detail token after scanning source codes
else if(command=="lex")
{
lexer.scanner(resource.get_source());
@@ -115,6 +119,7 @@ int main()
else
std::cout<<">> [Lexer] error occurred,stop."<<std::endl;
}
// print the parse result of source codes
else if(command=="par")
{
lexer.scanner(resource.get_source());
@@ -128,6 +133,7 @@ int main()
else
std::cout<<">> [Lexer] error occurred,stop."<<std::endl;
}
// print the ast of source codes
else if(command=="ast")
{
lexer.scanner(resource.get_source());
@@ -144,6 +150,7 @@ int main()
else
std::cout<<">> [Lexer] error occurred,stop."<<std::endl;
}
// running process begins here
else if(command=="run")
{
lexer.scanner(resource.get_source());
@@ -166,6 +173,7 @@ int main()
else
std::cout<<">> [Lexer] error occurred,stop."<<std::endl;
}
// do you wanna see it again?
else if(command=="logo")
{
std::cout<<" __ _ "<<std::endl;
@@ -174,16 +182,7 @@ int main()
std::cout<<" / /\\ / (_| \\__ \\ (_| | | "<<std::endl;
std::cout<<" \\_\\ \\/ \\__,_|___/\\__,_|_|"<<std::endl;
}
else if(command=="info")
{
lexer.scanner(resource.get_source());
lexer.print_token_list();
lexer.generate_detail_token();
parser.get_token_list(lexer.get_detail_token_list());
parser.print_detail_token();
parser.main_generate();
parser.get_root().print_tree();
}
// exit interpreter
else if(command=="exit")
break;
else