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use std::borrow::Cow;
use std::convert::AsRef;
use std::error::Error;
use std::ffi::{
OsStr,
OsString,
};
use std::fmt::{
self,
Display,
Formatter,
};
use std::io::Write;
use std::path::Path;
use std::sync::OnceLock;
use std::{
env,
io,
};
use unicode_width::UnicodeWidthStr;
use crate::unicode;
const TAB_AS_SPACES: &'static str = " ";
const TABSIZE: usize = TAB_AS_SPACES.len();
#[derive(Clone, Copy, Default, Eq, PartialEq)]
pub enum ErrorStyle {
OneLine,
#[default]
Standard,
}
pub static ERROR_STYLE: OnceLock<ErrorStyle> = OnceLock::new();
pub fn progname() -> &'static OsString {
static ARGV0: OnceLock<OsString> = OnceLock::new();
return ARGV0.get_or_init(|| {
let default = OsStr::new("oryxc");
let s = env::args_os().next().unwrap_or(default.into());
return Path::new(&s).file_name().unwrap_or(default).to_os_string();
});
}
#[macro_export]
macro_rules! warn {
($err:expr, $fmt:literal, $($arg:tt)*) => {{
use crate::errors::progname;
let _ = eprintln!("{}: {}: {}", progname().display(),
format_args!($fmt, $($arg)*), $err);
}};
($err:expr, $fmt:literal) => {{
warn!($err, $fmt,);
}};
($err:expr) => {{
use crate::errors::progname;
let _ = eprintln!("{}: {}", progname().display(), $err);
}};
}
#[macro_export]
macro_rules! err {
($err:expr, $fmt:literal, $($arg:tt)*) => {{
use crate::warn;
warn!($err, $fmt, $($arg)*);
std::process::exit(1);
}};
($err:expr, $fmt:literal) => {{
err!($err, $fmt,);
}};
($err:expr) => {{
use crate::warn;
warn!($err);
std::process::exit(1);
}};
}
#[derive(Debug)]
pub struct OryxError {
pub span: (usize, usize),
pub msg: Cow<'static, str>,
}
impl OryxError {
pub fn new<T>(span: (usize, usize), msg: T) -> Self
where
T: Into<Cow<'static, str>>,
{
return Self {
span,
msg: msg.into(),
};
}
pub fn report<Tf, Tb>(&self, filename: &Tf, buffer: &Tb)
where
Tf: AsRef<OsStr>,
Tb: AsRef<str>,
{
fn nspaces(n: i32) -> i32 {
return match () {
() if n < 10000 => 6,
() if n < 100000 => 7,
() if n < 1000000 => 8,
() if n < 10000000 => 9,
() if n < 100000000 => 10,
() if n < 1000000000 => 11,
() => 12,
};
}
let buffer = buffer.as_ref();
let (mut line, mut linebeg, mut lineend) = (1, 0, buffer.len());
for (i, c) in buffer.char_indices() {
if unicode::line_terminator_p(c) {
if i >= self.span.0 {
lineend = i;
break;
}
line += 1;
linebeg = i + c.len_utf8();
}
}
let (spanbeg, spanend) = (self.span.0, self.span.1.min(lineend));
let errbeg = new_string_with_spaces(&buffer[linebeg..spanbeg]);
let errmid = new_string_with_spaces(&buffer[spanbeg..spanend]);
let errend = new_string_with_spaces(&buffer[spanend..lineend]);
let errmid = if errmid.len() == 0 {
"_".to_string()
} else {
errmid
};
/* TODO: Do tab math */
let col = errbeg.width() + 1;
const FNAMEBEG: &str = "\x1b[37;1m";
const ERRORBEG: &str = "\x1b[31;1m";
const FMTEND: &str = "\x1b[0m";
let mut handle = io::stderr().lock();
let _ = write!(
handle,
"{FNAMEBEG}{}:{line}:{col}:{FMTEND} {ERRORBEG}error:{FMTEND} {self}\n",
filename.as_ref().display()
);
if *ERROR_STYLE.get_or_init(|| ErrorStyle::Standard)
== ErrorStyle::OneLine
{
return;
}
let _ = write!(
handle,
" {line:>4} │ {errbeg}{ERRORBEG}{errmid}{FMTEND}{errend}\n"
);
for _ in 0..nspaces(line) {
let _ = write!(handle, " ");
}
let _ = write!(handle, "│ ");
for _ in 1..col {
let _ = write!(handle, " ");
}
let _ = write!(handle, "{ERRORBEG}");
for _ in 0..errmid.width().max(1) {
let _ = write!(handle, "^");
}
let _ = write!(handle, "{FMTEND}\n");
}
}
fn new_string_with_spaces(s: &str) -> String {
let ntabs = s.bytes().filter(|b| *b == b'\t').count();
let mut buf = String::with_capacity(s.len() + ntabs * (TABSIZE - 1));
for c in s.chars() {
if c == '\t' {
buf.push_str(TAB_AS_SPACES);
} else {
buf.push(c);
}
}
return buf;
}
impl Display for OryxError {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
return write!(f, "{}", self.msg);
}
}
impl Error for OryxError {}
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