68 lines
1.7 KiB
Rust
68 lines
1.7 KiB
Rust
#![feature(advanced_slice_patterns, slice_patterns)]
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extern crate simplerepl;
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use std::path::Path;
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use std::fs::File;
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use std::io::Read;
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use simplerepl::{REPL, ReplState};
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use tokenizer::tokenize;
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mod tokenizer;
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use parser::{ParseResult, parse};
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mod parser;
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fn main() {
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let args: Vec<String> = std::env::args().collect();
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println!("Schala v 0.02");
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if let Some(filename) = args.get(1) {
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let mut source_file = File::open(&Path::new(filename)).unwrap();
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let mut buffer = String::new();
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source_file.read_to_string(&mut buffer).unwrap();
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panic!("Not implemented yet");
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} else {
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let initial_state = InterpreterState { show_tokens: false, show_parse: false };
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REPL::with_prompt_and_state(Box::new(repl_handler), ">> ", initial_state)
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.run();
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}
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}
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struct InterpreterState {
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show_tokens: bool,
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show_parse: bool,
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}
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impl ReplState for InterpreterState {
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fn update_state(&mut self, input: &Vec<&str>) {
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match &input[..] {
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["set", "show", "tokens", "true"] => {
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self.show_tokens = true;
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},
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["set", "show", "tokens", "false"] => {
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self.show_tokens = false;
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},
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["set", "show", "parse", "true"] => {
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self.show_parse = true;
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},
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["set", "show", "parse", "false"] => {
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self.show_parse = false;
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},
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_ => ()
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}
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}
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}
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fn repl_handler(input: &str, state: &mut InterpreterState) -> String {
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if state.show_tokens {
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println!("Tokens: {:?}", tokenize(input))
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}
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if state.show_parse {
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println!("Parse: {:?}", parse(tokenize(input)))
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}
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format!("{:?}", parse(tokenize(input)))
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}
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