90 lines
2.4 KiB
Rust
90 lines
2.4 KiB
Rust
//! Implement's the command line interface
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use crate::{
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args::{Args, Mode},
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ctx::Context,
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menu,
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tools::print_token,
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};
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use cl_interpret::{env::Environment, interpret::Interpret, temp_type_impl::ConValue};
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use cl_lexer::Lexer;
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use cl_parser::Parser;
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use std::{error::Error, path::Path};
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/// Run the command line interface
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pub fn run(args: Args) -> Result<(), Box<dyn Error>> {
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let Args { file, include, mode, repl } = args;
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let mut env = Environment::new();
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for path in include {
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load_file(&mut env, path)?;
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}
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if repl {
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if let Some(file) = file {
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load_file(&mut env, file)?;
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}
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let mut ctx = Context::with_env(env);
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match mode {
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Mode::Menu => menu::main_menu(&mut ctx)?,
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Mode::Lex => menu::lex(&mut ctx)?,
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Mode::Fmt => menu::fmt(&mut ctx)?,
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Mode::Run => menu::run(&mut ctx)?,
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}
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} else {
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let code = match &file {
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Some(file) => std::fs::read_to_string(file)?,
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None => std::io::read_to_string(std::io::stdin())?,
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};
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match mode {
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Mode::Lex => lex_code(&code, file),
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Mode::Fmt => fmt_code(&code),
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Mode::Run | Mode::Menu => run_code(&code, &mut env),
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}?;
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}
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Ok(())
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}
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fn load_file(
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env: &mut Environment,
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path: impl AsRef<Path>,
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) -> Result<ConValue, Box<dyn Error>> {
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let file = std::fs::read_to_string(path)?;
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let code = Parser::new(Lexer::new(&file)).file()?;
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Ok(env.eval(&code)?)
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}
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fn lex_code(code: &str, path: Option<impl AsRef<Path>>) -> Result<(), Box<dyn Error>> {
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for token in Lexer::new(code) {
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if let Some(path) = &path {
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print!("{}:", path.as_ref().display());
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}
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match token {
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Ok(token) => print_token(&token),
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Err(e) => println!("{e}"),
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}
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}
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Ok(())
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}
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fn fmt_code(code: &str) -> Result<(), Box<dyn Error>> {
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let code = Parser::new(Lexer::new(code)).file()?;
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println!("{code}");
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Ok(())
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}
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fn run_code(code: &str, env: &mut Environment) -> Result<(), Box<dyn Error>> {
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let code = Parser::new(Lexer::new(code)).file()?;
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match code.interpret(env)? {
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ConValue::Empty => {}
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ret => println!("{ret}"),
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}
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if env.get("main").is_ok() {
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match env.call("main", &[])? {
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ConValue::Empty => {}
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ret => println!("{ret}"),
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}
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}
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Ok(())
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}
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