xxq250/Nasal-Interpreter
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variables can be used before definition

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change program to command line
change trace back info
change print function of nasal_vec and nasal_hash
This commit is contained in:
Li Haokun
2021-08-03 18:55:11 +08:00
committed by GitHub
parent d0616ef028
commit fa618eb97f
7 changed files with 178 additions and 140 deletions
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112
main.cpp
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@@ -1,42 +1,30 @@
#include "nasal.h"
void help_interact()
{
std::cout
<<">> [ ] input a file name to execute. \n"
<<">> [help ] show help. \n"
<<">> [ast ] view abstract syntax tree. \n"
<<">> [code ] view byte code. \n"
<<">> [exec ] execute program on bytecode vm.\n"
<<">> [logo ] print logo of nasal . \n"
<<">> [exit ] quit nasal interpreter. \n";
return;
}
void help_cmd()
{
std::cout
#ifdef _WIN32
<<"use command \'chcp 65001\' if want to use unicode.\n"
#endif
<<"nasal [option]|[file]\n"
<<" input 0 argument to use the interactive interpreter.\n"
<<"nasal [option]\n"
<<"option:\n"
<<" -h, --help | get help.\n"
<<" -v, --version | get version of nasal interpreter.\n"
<<" -v, --version | get version of nasal interpreter.\n\n"
<<"nasal [file]\n"
<<"file:\n"
<<" input file name to execute script file.\n\n"
<<"nasal [option] [file]\n"
<<"option:\n"
<<" --lex | view token info.\n"
<<" --ast | view abstract syntax tree.\n"
<<" --code | view bytecode.\n"
<<" --exec | execute script file.\n"
<<" --time | execute and get the running time.\n"
<<"file:\n"
<<" input file name to execute script file.\n";
return;
}
void info()
{
std::cout
<<">> thanks to https://github.com/andyross/nasal\n"
<<">> code: https://github.com/ValKmjolnir/Nasal-Interpreter\n"
<<">> code: https://gitee.com/valkmjolnir/Nasal-Interpreter\n"
<<">> info: http://wiki.flightgear.org/Nasal_scripting_language\n"
<<">> input \"help\" to get help .\n";
return;
}
void logo()
{
std::cout
@@ -45,14 +33,21 @@ void logo()
<<" / \\/ / _` / __|/ _` | | \n"
<<" / /\\ / (_| \\__ \\ (_| | | \n"
<<" \\_\\ \\/ \\__,_|___/\\__,_|_|\n"
<<" nasal interpreter ver 7.0 \n";
<<"nasal interpreter ver 7.0\n"
<<"thanks to : https://github.com/andyross/nasal\n"
<<"code repo : https://github.com/ValKmjolnir/Nasal-Interpreter\n"
<<"code repo : https://gitee.com/valkmjolnir/Nasal-Interpreter\n"
<<"lang info : http://wiki.flightgear.org/Nasal_scripting_language\n"
<<"input \"nasal -h\" to get help .\n";
return;
}
void die(const char* stage,std::string& filename)
{
std::cout<<">> ["<<stage<<"] in <\""<<filename<<"\">: error(s) occurred,stop.\n";
std::cout<<">> ["<<stage<<"] in <"<<filename<<">: error(s) occurred,stop.\n";
return;
}
void execute(std::string& file,std::string& command)
{
nasal_lexer lexer;
@@ -67,13 +62,18 @@ void execute(std::string& file,std::string& command)
die("lexer",file);
return;
}
if(command=="--lex")
{
lexer.print_token();
return;
}
parse.main_process(lexer.get_token_list());
if(parse.get_error())
{
die("parse",file);
return;
}
if(command=="ast")
if(command=="--ast")
{
parse.get_root().print_ast(0);
return;
@@ -91,7 +91,7 @@ void execute(std::string& file,std::string& command)
die("codegen",file);
return;
}
if(command=="code")
if(command=="--code")
{
codegen.print_byte_code();
return;
@@ -101,55 +101,45 @@ void execute(std::string& file,std::string& command)
codegen.get_num_table(),
import.get_file()
);
vm.run(codegen.get_exec_code());
if(command=="--exec")
vm.run(codegen.get_exec_code());
else if(command=="--time")
{
clock_t begin=clock();
vm.run(codegen.get_exec_code());
std::cout<<"process exited after "<<((double)(clock()-begin))/CLOCKS_PER_SEC<<"s.\n";
}
vm.clear();
return;
}
void interact()
{
#ifdef _WIN32
// use chcp 65001 to use unicode io
system("chcp 65001");
#endif
std::string command,file="null";
logo();
info();
while(1)
{
std::cout<<">> ";
std::cin>>command;
if(command=="help")
help_interact();
else if(command=="logo")
logo();
else if(command=="exit")
return;
else if(command=="ast" || command=="code" || command=="exec")
execute(file,command);
else
file=command;
}
}
int main(int argc,const char* argv[])
{
std::string command,file="null";
if(argc==1)
interact();
else if(argc==2 && (!strcmp(argv[1],"-v") || !strcmp(argv[1],"--version")))
if(argc==2 && (!strcmp(argv[1],"-v") || !strcmp(argv[1],"--version")))
logo();
else if(argc==2 && (!strcmp(argv[1],"-h") || !strcmp(argv[1],"--help")))
help_cmd();
else if(argc==2 && argv[1][0]!='-')
{
file=argv[1];
command="exec";
command="--exec";
execute(file,command);
}
else if(argc==3 &&
(!strcmp(argv[1],"--lex") ||
!strcmp(argv[1],"--ast") ||
!strcmp(argv[1],"--code") ||
!strcmp(argv[1],"--exec") ||
!strcmp(argv[1],"--time")))
{
file=argv[2];
command=argv[1];
execute(file,command);
return 0;
}
else
{
std::cout
<<"invalid command.\n"
<<"invalid argument(s).\n"
<<"use nasal -h to get help.\n";
}
return 0;