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use std::fs::File;
use std::io::{BufRead, BufReader};
use std::iter::Peekable;
use std::path::PathBuf;
use std::process::exit;
use std::str::Chars;
pub fn read_file(source: &PathBuf) -> String {
let file = File::open(&source).unwrap_or_else(|e| {
eprintln!("axisc: Unable to open {:?} for reading: {}", &source, e);
exit(1)
});
let reader = BufReader::new(file);
let mut string = String::from("");
for line in reader.lines() {
let mut line = line.unwrap();
if let Some(char_index) = line.find("--") {
line.truncate(char_index);
}
if !line.is_empty() {
string.push_str(line.trim());
string.push('\n');
}
}
string
}
pub struct TokenScanner<'a> {
pub chars: Peekable<Chars<'a>>
}
impl <'a> TokenScanner<'a> {
pub fn advance(&mut self, num: usize) -> Option<char> {
self.chars.nth(num - 1)
}
pub fn peek(&mut self) -> Option<&char> {
self.chars.peek()
}
pub fn advance_word(&mut self) -> String {
let mut word = String::new();
while let Some(char) = self.chars.next() {
if char.is_ascii_whitespace() {
break;
}
word.push(char);
}
word
}
pub fn peek_word(&mut self) -> String {
todo!(":(")
}
pub fn from_string(string: &'a str) -> Self {
Self {
chars: string.chars().peekable()
}
}
}
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