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use std::env;
use std::process;
mod scanner;
mod ast;
mod parser;
mod interpreter;
mod precedence_parser;
mod codegen;
use scanner::Scanner;
use parser::Parser;
use interpreter::Interpreter;
use precedence_parser::PrecedenceParser;
// 打印用法信息
fn usage(prog: &str) {
eprintln!("Usage: {} [--parser=type] [--mode=mode] infile", prog);
eprintln!(" --parser=type Specify parser type: 'precedence' (default) or 'recursive'");
eprintln!(" --mode=mode Specify execution mode: 'interpret' (default) or 'compile'");
process::exit(1);
}
// 评估AST并打印结果
fn evaluate_and_print(ast: Box<ast::ASTNode>) {
match Interpreter::evaluate(&ast) {
Ok(result) => {
println!("Result: {}", result);
},
Err(e) => {
eprintln!("Evaluation error: {}", e);
process::exit(1);
},
}
}
fn main() {
let args: Vec<String> = env::args().collect();
let mut parser_type = "precedence";
let mut mode = "compile";
let mut filename = "";
// Parse command line arguments
let mut remaining_args = args.len() - 1; // Subtract program name
let mut arg_index = 1;
while remaining_args > 0 {
if args[arg_index].starts_with("--parser=") {
parser_type = &args[arg_index][9..];
arg_index += 1;
remaining_args -= 1;
} else if args[arg_index].starts_with("--mode=") {
mode = &args[arg_index][7..];
arg_index += 1;
remaining_args -= 1;
} else if filename.is_empty() {
filename = &args[arg_index];
arg_index += 1;
remaining_args -= 1;
} else {
usage(&args[0]);
}
}
if filename.is_empty() {
usage(&args[0]);
}
if filename.is_empty() {
usage(&args[0]);
}
match Scanner::new(filename) {
Ok(scanner) => {
match parser_type {
"recursive" => {
match Parser::new(scanner) {
Ok(mut parser) => {
match parser.parse() {
Ok(ast) => {
match mode {
"interpret" => {
evaluate_and_print(ast);
},
"compile" => {
match codegen::CodeGenerator::new("out.s") {
Ok(mut codegen) => {
if let Err(e) = codegen.generate_code(&ast) {
eprintln!("Code generation error: {}", e);
process::exit(1);
}
println!("Assembly code generated to out.s");
// Assemble the .s file into .o file using nasm
let assemble_output = std::process::Command::new("nasm")
.args(["-f", "win64", "out.s", "-o", "out.o"])
.output()
.expect("Failed to execute nasm");
if !assemble_output.status.success() {
eprintln!("Assembly failed");
eprintln!("stderr: {}", String::from_utf8_lossy(&assemble_output.stderr));
process::exit(1);
}
// Link the .o file into executable using gcc
let link_output = std::process::Command::new("gcc")
.args(["-o", "out.exe", "out.o"])
.output()
.expect("Failed to execute gcc");
if !link_output.status.success() {
eprintln!("Linking failed");
eprintln!("stderr: {}", String::from_utf8_lossy(&link_output.stderr));
process::exit(1);
}
println!("Executable file 'out.exe' generated successfully");
// Run the generated executable
let run_output = std::process::Command::new(".\\out.exe")
.output()
.expect("Failed to execute out.exe");
if !run_output.status.success() {
eprintln!("Execution failed");
eprintln!("stderr: {}", String::from_utf8_lossy(&run_output.stderr));
process::exit(1);
}
println!("Program output:");
println!("{}", String::from_utf8_lossy(&run_output.stdout));
},
Err(e) => {
eprintln!("Code generator initialization error: {}", e);
process::exit(1);
},
}
},
_ => {
eprintln!("Invalid mode: {}", mode);
usage(&args[0]);
},
}
},
Err(e) => {
eprintln!("Parsing error: {}", e);
process::exit(1);
},
}
},
Err(e) => {
eprintln!("Parser initialization error: {}", e);
process::exit(1);
},
}
},
"precedence" => {
match PrecedenceParser::new(scanner) {
Ok(mut parser) => {
match parser.parse() {
Ok(ast) => {
match mode {
"interpret" => {
evaluate_and_print(ast);
},
"compile" => {
match codegen::CodeGenerator::new("out.s") {
Ok(mut codegen) => {
if let Err(e) = codegen.generate_code(&ast) {
eprintln!("Code generation error: {}", e);
process::exit(1);
}
println!("Assembly code generated to out.s");
// Assemble the .s file into .o file using nasm
let assemble_output = std::process::Command::new("nasm")
.args(["-f", "win64", "out.s", "-o", "out.o"])
.output()
.expect("Failed to execute nasm");
if !assemble_output.status.success() {
eprintln!("Assembly failed");
eprintln!("stderr: {}", String::from_utf8_lossy(&assemble_output.stderr));
process::exit(1);
}
// Link the .o file into executable using gcc
let link_output = std::process::Command::new("gcc")
.args(["-o", "out.exe", "out.o"])
.output()
.expect("Failed to execute gcc");
if !link_output.status.success() {
eprintln!("Linking failed");
eprintln!("stderr: {}", String::from_utf8_lossy(&link_output.stderr));
process::exit(1);
}
println!("Executable file 'out.exe' generated successfully");
},
Err(e) => {
eprintln!("Code generator initialization error: {}", e);
process::exit(1);
},
}
},
_ => {
eprintln!("Invalid mode: {}", mode);
usage(&args[0]);
},
}
},
Err(e) => {
eprintln!("Parsing error: {}", e);
process::exit(1);
},
}
},
Err(e) => {
eprintln!("Parser initialization error: {}", e);
process::exit(1);
},
}
},
_ => {
eprintln!("Unknown parser type: {}", parser_type);
usage(&args[0]);
}
}
},
Err(e) => {
eprintln!("Unable to open {}: {}", filename, e);
process::exit(1);
},
}
}