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Rename dir: compiler -> crates

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Shunsuke Shibayama 2023-01-15 12:03:19 +09:00
parent e1004b538d
commit a127564b31
221 changed files with 17 additions and 19 deletions
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crates/erg_common/error.rs Normal file
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//! provides common components for error handling.
//!
//! エラー処理に関する汎用的なコンポーネントを提供する
use std::cmp;
use std::fmt;
use std::io::{stderr, BufWriter, Write as _};
use crate::config::Input;
use crate::style::Attribute;
use crate::style::Characters;
use crate::style::Color;
use crate::style::StyledStr;
use crate::style::StyledStrings;
use crate::style::Theme;
use crate::style::THEME;
use crate::traits::{Locational, Stream};
use crate::{impl_display_from_debug, switch_lang};
/// This includes not only Error but also Warning, Exception
/// Numbering of this is not specifically related to ErrFmt.errno().
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
#[repr(u8)]
pub enum ErrorKind {
/* compile errors */
AssignError = 0,
AttributeError = 1,
BytecodeError = 2,
CompilerSystemError = 3,
EnvironmentError = 4,
FeatureError = 5,
ImportError = 6,
IndentationError = 7,
NameError = 8,
NotImplementedError = 9,
PatternError = 10,
SyntaxError = 11,
TabError = 12,
TypeError = 13,
UnboundLocalError = 14,
PurityError = 15,
HasEffect = 16,
MoveError = 17,
NotConstExpr = 18,
InheritanceError = 19,
VisibilityError = 20,
MethodError = 21,
DummyError = 22,
/* compile warnings */
AttributeWarning = 60,
CastWarning = 61,
DeprecationWarning = 62,
FutureWarning = 63,
ImportWarning = 64,
PendingDeprecationWarning = 65,
SyntaxWarning = 66,
TypeWarning = 67,
NameWarning = 68,
UnusedWarning = 69,
Warning = 70,
/* runtime errors */
ArithmeticError = 100,
AssertionError = 101,
BlockingIOError = 102,
BrokenPipeError = 103,
BufferError = 104,
ChildProcessError = 105,
ConnectionAbortedError = 106,
ConnectionError = 107,
ConnectionRefusedError = 108,
ConnectionResetError = 109,
EOFError = 110,
FileExistsError = 111,
FileNotFoundError = 112,
IndexError = 113,
InterruptedError = 114,
IoError = 115,
IsADirectoryError = 116,
KeyError = 117,
LookupError = 118,
MemoryError = 119,
ModuleNotFoundError = 120,
NotADirectoryError = 121,
OSError = 122,
OverflowError = 123,
PermissionError = 124,
ProcessLookupError = 125,
RecursionError = 126,
ReferenceError = 127,
RuntimeAttributeError = 128,
RuntimeError = 129,
RuntimeTypeError = 130,
RuntimeUnicodeError = 131,
TimeoutError = 132,
UnicodeError = 133,
UserError = 134,
ValueError = 135,
VMSystemError = 136,
WindowsError = 137,
ZeroDivisionError = 138,
/* runtime warnings */
BytesWarning = 180,
ResourceWarning = 181,
RuntimeWarning = 182,
UnicodeWarning = 183,
UserWarning = 184,
/* exceptions */
BaseException = 200,
Exception = 201,
GeneratorExit = 202,
KeyboardInterrupt = 203,
StopAsyncIteration = 204,
StopIteration = 205,
SystemExit = 206,
UserException = 207,
}
use ErrorKind::*;
impl_display_from_debug!(ErrorKind);
impl ErrorKind {
pub fn is_warning(&self) -> bool {
(60..=100).contains(&(*self as u8)) || (180..=200).contains(&(*self as u8))
}
pub fn is_error(&self) -> bool {
(0..=59).contains(&(*self as u8)) || (100..=179).contains(&(*self as u8))
}
pub fn is_exception(&self) -> bool {
(200..=255).contains(&(*self as u8))
}
}
impl From<&str> for ErrorKind {
fn from(s: &str) -> ErrorKind {
match s {
"AssignError" => Self::AssignError,
"AttributeError" => Self::AttributeError,
"BytecodeError" => Self::BytecodeError,
"CompilerSystemError" => Self::CompilerSystemError,
"EnvironmentError" => Self::EnvironmentError,
"FeatureError" => Self::FeatureError,
"ImportError" => Self::ImportError,
"IndentationError" => Self::IndentationError,
"NameError" => Self::NameError,
"NotImplementedError" => Self::NotImplementedError,
"PatternError" => Self::PatternError,
"SyntaxError" => Self::SyntaxError,
"TabError" => Self::TabError,
"TypeError" => Self::TypeError,
"UnboundLocalError" => Self::UnboundLocalError,
"HasEffect" => Self::HasEffect,
"PurityError" => Self::PurityError,
"MoveError" => Self::MoveError,
"AttributeWarning" => Self::AttributeWarning,
"CastWarning" => Self::CastWarning,
"DeprecationWarning" => Self::DeprecationWarning,
"FutureWarning" => Self::FutureWarning,
"ImportWarning" => Self::ImportWarning,
"PendingDeprecationWarning" => Self::PendingDeprecationWarning,
"SyntaxWarning" => Self::SyntaxWarning,
"TypeWarning" => Self::TypeWarning,
"NameWarning" => Self::NameWarning,
"UnusedWarning" => Self::UnusedWarning,
"Warning" => Self::Warning,
"ArithmeticError" => Self::ArithmeticError,
"AssertionError" => Self::AssertionError,
"BlockingIOError" => Self::BlockingIOError,
"BrokenPipeError" => Self::BrokenPipeError,
"BufferError" => Self::BufferError,
"ChildProcessError" => Self::ChildProcessError,
"ConnectionAbortedError" => Self::ConnectionAbortedError,
"ConnectionError" => Self::ConnectionError,
"ConnectionRefusedError" => Self::ConnectionRefusedError,
"ConnectionResetError" => Self::ConnectionResetError,
"EOFError" => Self::EOFError,
"FileExistsError" => Self::FileExistsError,
"FileNotFoundError" => Self::FileNotFoundError,
"IndexError" => Self::IndexError,
"InterruptedError" => Self::InterruptedError,
"IoError" => Self::IoError,
"IsADirectoryError" => Self::IsADirectoryError,
"KeyError" => Self::KeyError,
"LookupError" => Self::LookupError,
"MemoryError" => Self::MemoryError,
"ModuleNotFoundError" => Self::ModuleNotFoundError,
"NotADirectoryError" => Self::NotADirectoryError,
"OSError" => Self::OSError,
"OverflowError" => Self::OverflowError,
"PermissionError" => Self::PermissionError,
"ProcessLookupError" => Self::ProcessLookupError,
"RecursionError" => Self::RecursionError,
"ReferenceError" => Self::ReferenceError,
"RuntimeAttributeError" => Self::RuntimeAttributeError,
"RuntimeError" => Self::RuntimeError,
"RuntimeTypeError" => Self::RuntimeTypeError,
"RuntimeUnicodeError" => Self::RuntimeUnicodeError,
"TimeoutError" => Self::TimeoutError,
"UnicodeError" => Self::UnicodeError,
"UserError" => Self::UserError,
"ValueError" => Self::ValueError,
"VMSystemError" => Self::VMSystemError,
"WindowsError" => Self::WindowsError,
"ZeroDivisionError" => Self::ZeroDivisionError,
"BytesWarning" => Self::BytesWarning,
"ResourceWarning" => Self::ResourceWarning,
"RuntimeWarning" => Self::RuntimeWarning,
"UnicodeWarning" => Self::UnicodeWarning,
"UserWarning" => Self::UserWarning,
"BaseException" => Self::BaseException,
"Exception" => Self::Exception,
"GeneratorExit" => Self::GeneratorExit,
"KeyboardInterrupt" => Self::KeyboardInterrupt,
"StopAsyncIteration" => Self::StopAsyncIteration,
"StopIteration" => Self::StopIteration,
"SystemExit" => Self::SystemExit,
"UserException" => Self::UserException,
_ => Self::UserError,
}
}
}
///
/// Points the location (of an error) in a code.
/// The beginning and end of each row and column where the error occurred.
/// Basically, the beginning and end of each row and column where the error occurred is kept.
///
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub enum Location {
///
/// Location used for basic errors
/// ```erg
/// // erg
/// a = 1
/// a = 2
/// // Value assigned to the structure
/// Location::Range {
/// ln_begin: 2,
/// col_begin: 0,
/// ln_end: 2,
/// col_end: 1,
/// }
/// ```
///
Range {
ln_begin: u32,
col_begin: u32,
ln_end: u32,
col_end: u32,
},
/// Used for loss of location information when desugared.
/// If there are guaranteed to be multiple rows
LineRange(u32, u32),
/// Used when Location information is lost when desugared
/// If it is guaranteed to be a single line
Line(u32),
/// Used by default in case of loss of Location information
#[default]
Unknown,
}
impl Location {
pub fn concat<L: Locational, R: Locational>(l: &L, r: &R) -> Self {
match (l.ln_begin(), l.col_begin(), r.ln_end(), r.col_end()) {
(Some(lb), Some(cb), Some(le), Some(ce)) => Self::range(lb, cb, le, ce),
(Some(lb), _, Some(le), _) => Self::LineRange(lb, le),
(Some(l), _, _, _) | (_, _, Some(l), _) => Self::Line(l),
_ => Self::Unknown,
}
}
pub const fn range(ln_begin: u32, col_begin: u32, ln_end: u32, col_end: u32) -> Self {
Self::Range {
ln_begin,
col_begin,
ln_end,
col_end,
}
}
pub const fn is_unknown(&self) -> bool {
matches!(self, Self::Unknown)
}
pub const fn unknown_or(&self, other: Self) -> Self {
if self.is_unknown() {
other
} else {
*self
}
}
pub const fn ln_begin(&self) -> Option<u32> {
match self {
Self::Range { ln_begin, .. } | Self::LineRange(ln_begin, _) | Self::Line(ln_begin) => {
Some(*ln_begin)
}
Self::Unknown => None,
}
}
pub const fn ln_end(&self) -> Option<u32> {
match self {
Self::Range { ln_end, .. } | Self::LineRange(ln_end, _) | Self::Line(ln_end) => {
Some(*ln_end)
}
Self::Unknown => None,
}
}
pub const fn col_begin(&self) -> Option<u32> {
match self {
Self::Range { col_begin, .. } => Some(*col_begin),
_ => None,
}
}
pub const fn col_end(&self) -> Option<u32> {
match self {
Self::Range { col_end, .. } => Some(*col_end),
_ => None,
}
}
}
#[allow(clippy::too_many_arguments)]
fn format_context<E: ErrorDisplay + ?Sized>(
e: &E,
ln_begin: usize,
ln_end: usize,
col_begin: usize,
col_end: usize,
err_color: Color,
gutter_color: Color,
// for formatting points
chars: &Characters,
// kinds of error for specify the color
mark: char,
sub_msg: &[String],
hint: Option<&String>,
) -> String {
let mark = mark.to_string();
let codes = if e.input().is_repl() {
vec![e.input().reread()]
} else {
e.input().reread_lines(ln_begin, ln_end)
};
let mut context = StyledStrings::default();
let final_step = ln_end - ln_begin;
let max_digit = ln_end.to_string().len();
let (vbreak, vbar) = chars.gutters();
let offset = format!("{} {} ", &" ".repeat(max_digit), vbreak);
for (i, lineno) in (ln_begin..=ln_end).enumerate() {
context.push_str_with_color(
&format!("{:<max_digit$} {vbar} ", lineno, vbar = vbar),
gutter_color,
);
context.push_str(codes.get(i).unwrap_or(&String::new()));
context.push_str("\n");
context.push_str_with_color(&offset, gutter_color);
if i == 0 && i == final_step {
context.push_str(&" ".repeat(col_begin));
context.push_str_with_color(
&mark.repeat(cmp::max(1, col_end.saturating_sub(col_begin))),
err_color,
);
} else if i == 0 {
context.push_str(&" ".repeat(col_begin));
context.push_str_with_color(
&mark.repeat(cmp::max(1, codes[i].len().saturating_sub(col_begin))),
err_color,
);
} else if i == final_step {
context.push_str_with_color(&mark.repeat(col_end), err_color);
} else {
context.push_str_with_color(&mark.repeat(cmp::max(1, codes[i].len())), err_color);
}
context.push_str("\n");
}
let msg_num = sub_msg.len().saturating_sub(1);
for (i, msg) in sub_msg.iter().enumerate() {
context.push_str_with_color(&offset, gutter_color);
context.push_str(&" ".repeat(col_end.saturating_sub(1)));
if i == msg_num && hint.is_none() {
context.push_str_with_color(&chars.left_bottom_line(), err_color);
} else {
context.push_str_with_color(&chars.left_cross(), err_color);
}
context.push_str(msg);
context.push_str("\n")
}
if let Some(hint) = hint {
context.push_str_with_color(&offset, gutter_color);
context.push_str(&" ".repeat(col_end.saturating_sub(1)));
context.push_str_with_color(&chars.left_bottom_line(), err_color);
context.push_str(hint);
context.push_str("\n")
}
context.to_string() + "\n"
}
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct SubMessage {
pub loc: Location,
pub msg: Vec<String>,
pub hint: Option<String>,
}
impl SubMessage {
///
/// Used when the msg or hint si empty.
/// `msg` is Vec\<String\> instead of Option\<String\> because it can be used when there are multiple `msg`s as well as multiple lines.
/// # Example
/// ```
/// # use erg_common::error::{Location, SubMessage};
/// # use erg_common::style::{Color, StyledString};
/// let loc = Location::Line(1);
/// let msg = SubMessage::ambiguous_new(loc, vec![], None); // this code same as only_loc()
///
/// let hint = Some("hint message here".to_string());
/// let msg = SubMessage::ambiguous_new(loc, vec![], hint);
/// /* example
/// -------
/// `- hint message here
/// */
///
/// let hint = Some("hint here".to_string());
/// let first = StyledString::new("1th message", Some(Color::Red), None);
/// let second = StyledString::new("2th message", Some(Color::White), None);
/// let nth = StyledString::new("nth message", Some(Color::Green), None);
/// let msg = SubMessage::ambiguous_new(
/// loc,
/// vec![
/// first.to_string(),
/// second.to_string(),
/// // ...,
/// nth.to_string(),
/// ],
/// hint);
/// /* example
/// -------
/// :- 1th message
/// :- 2th message
/// :
/// :- nth message
/// `- hint here
/// */
///
/// ```
///
pub fn ambiguous_new(loc: Location, msg: Vec<String>, hint: Option<String>) -> Self {
Self { loc, msg, hint }
}
///
/// Used when only Location is fixed.
/// In this case, error position is just modified
/// # Example
/// ```
/// # use erg_common::error::{Location, SubMessage};
/// let loc = Location::Line(1);
/// let sub_msg = SubMessage::only_loc(loc);
/// ```
pub fn only_loc(loc: Location) -> Self {
Self {
loc,
msg: Vec::new(),
hint: None,
}
}
pub fn set_hint<S: Into<String>>(&mut self, hint: S) {
self.hint = Some(hint.into());
}
pub fn get_hint(&self) -> Option<&str> {
self.hint.as_deref()
}
pub fn get_msg(&self) -> &[String] {
self.msg.as_ref()
}
// Line breaks are not included except for line breaks that signify the end of a sentence.
// In other words, do not include blank lines for formatting purposes.
fn format_code_and_pointer<E: ErrorDisplay + ?Sized>(
&self,
e: &E,
err_color: Color,
gutter_color: Color,
mark: char,
chars: &Characters,
) -> String {
match self.loc.unknown_or(e.core().loc) {
Location::Range {
ln_begin,
col_begin,
ln_end,
col_end,
} => format_context(
e,
ln_begin as usize,
ln_end as usize,
col_begin as usize,
col_end as usize,
err_color,
gutter_color,
chars,
mark,
&self.msg,
self.hint.as_ref(),
),
Location::LineRange(ln_begin, ln_end) => {
let input = e.input();
let (vbreak, vbar) = chars.gutters();
let mut cxt = StyledStrings::default();
let codes = if input.is_repl() {
vec![input.reread()]
} else {
input.reread_lines(ln_begin as usize, ln_end as usize)
};
let mark = mark.to_string();
for (i, lineno) in (ln_begin..=ln_end).enumerate() {
cxt.push_str_with_color(&format!("{lineno} {vbar} "), gutter_color);
cxt.push_str(codes.get(i).unwrap_or(&String::new()));
cxt.push_str("\n");
cxt.push_str_with_color(
&format!("{} {}", &" ".repeat(lineno.to_string().len()), vbreak),
gutter_color,
);
cxt.push_str(&" ".repeat(lineno.to_string().len()));
cxt.push_str_with_color(&mark.repeat(cmp::max(1, codes[i].len())), err_color);
cxt.push_str("\n");
}
cxt.push_str("\n");
for msg in self.msg.iter() {
cxt.push_str(msg);
cxt.push_str("\n");
}
if let Some(hint) = self.hint.as_ref() {
cxt.push_str(hint);
cxt.push_str("\n");
}
cxt.to_string()
}
Location::Line(lineno) => {
let input = e.input();
let (_, vbar) = chars.gutters();
let code = if input.is_repl() {
input.reread()
} else {
input
.reread_lines(lineno as usize, lineno as usize)
.remove(0)
};
let mut cxt = StyledStrings::default();
cxt.push_str_with_color(&format!(" {lineno} {} ", vbar), gutter_color);
cxt.push_str(&code);
cxt.push_str("\n");
for msg in self.msg.iter() {
cxt.push_str(msg);
cxt.push_str("\n");
}
if let Some(hint) = self.hint.as_ref() {
cxt.push_str(hint);
cxt.push_str("\n");
}
cxt.push_str("\n");
cxt.to_string()
}
Location::Unknown => match e.input() {
Input::File(_) => "\n".to_string(),
other => {
let (_, vbar) = chars.gutters();
let mut cxt = StyledStrings::default();
cxt.push_str_with_color(&format!(" ? {} ", vbar), gutter_color);
cxt.push_str(&other.reread());
cxt.push_str("\n");
for msg in self.msg.iter() {
cxt.push_str(msg);
cxt.push_str("\n");
}
if let Some(hint) = self.hint.as_ref() {
cxt.push_str(hint);
cxt.push_str("\n");
}
cxt.push_str("\n");
cxt.to_string()
}
},
}
}
}
/// In Erg, common parts used by error.
/// Must be wrap when to use.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub struct ErrorCore {
pub sub_messages: Vec<SubMessage>,
pub main_message: String,
pub errno: usize,
pub kind: ErrorKind,
pub loc: Location,
theme: Theme,
}
impl fmt::Display for ErrorCore {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{self:?}")
}
}
impl std::error::Error for ErrorCore {}
impl ErrorCore {
pub fn new<S: Into<String>>(
sub_messages: Vec<SubMessage>,
main_message: S,
errno: usize,
kind: ErrorKind,
loc: Location,
) -> Self {
Self {
sub_messages,
main_message: main_message.into(),
errno,
kind,
loc,
theme: THEME,
}
}
pub fn dummy(errno: usize) -> Self {
Self::new(
vec![SubMessage::only_loc(Location::Unknown)],
"<dummy>",
errno,
DummyError,
Location::Unknown,
)
}
pub fn unreachable(fn_name: &str, line: u32) -> Self {
Self::bug(line as usize, Location::Line(line), fn_name, line)
}
pub fn bug(errno: usize, loc: Location, fn_name: &str, line: u32) -> Self {
const URL: StyledStr = StyledStr::new(
"https://github.com/erg-lang/erg",
Some(Color::White),
Some(Attribute::Underline),
);
let m_msg = switch_lang!(
"japanese" => format!("これはErgのバグです、開発者に報告して下さい({URL})\n{fn_name}:{line}より発生"),
"simplified_chinese" => format!("这是Erg的bug，请报告给{URL}\n原因来自: {fn_name}:{line}"),
"traditional_chinese" => format!("这是Erg的bug，请报告给{URL}\n原因来自: {fn_name}:{line}"),
"english" => format!("this is a bug of Erg, please report it to {URL}\ncaused from: {fn_name}:{line}"),
);
Self::new(
vec![SubMessage::only_loc(loc)],
m_msg,
errno,
CompilerSystemError,
loc,
)
}
pub fn get_loc_with_fallback(&self) -> Location {
if self.loc == Location::Unknown {
for sub in &self.sub_messages {
if sub.loc != Location::Unknown {
return sub.loc;
}
}
Location::Unknown
} else {
self.loc
}
}
pub fn fmt_header(&self, color: Color, caused_by: &str, input: &str) -> String {
let loc = match self.loc {
Location::Range {
ln_begin, ln_end, ..
} if ln_begin == ln_end => format!(", line {ln_begin}"),
Location::Range {
ln_begin, ln_end, ..
}
| Location::LineRange(ln_begin, ln_end) => format!(", line {ln_begin}..{ln_end}"),
Location::Line(lineno) => format!(", line {lineno}"),
Location::Unknown => "".to_string(),
};
let kind = if self.kind.is_error() {
"Error"
} else if self.kind.is_warning() {
"Warning"
} else {
"Exception"
};
let kind = self.theme.characters.error_kind_format(kind, self.errno);
format!(
"{kind}: File {input}{loc}, {caused_by}",
kind = StyledStr::new(&kind, Some(color), Some(Attribute::Bold))
)
}
fn specified_theme(&self) -> (Color, char) {
let (color, mark) = if self.kind.is_error() {
self.theme.error()
} else if self.kind.is_warning() {
self.theme.warning()
} else {
self.theme.exception()
};
(color, mark)
}
}
/// format:
/// ```txt
/// Error[#{.errno}]: File {file}, line {.loc (as line)}, in {.caused_by}
///
/// {.loc (as line)}| {src}
/// {offset} : {pointer}
/// {offset} : {sub_msgs}
/// {offset} : {.hint}
///
/// {.kind}: {.desc}
///
/// ```
///
/// example:
/// ```txt
/// Error[#2223]: File <stdin>, line 1, in <module>
///
/// 1 │ 100 = i
/// · ---
/// · │─ sub_msg1: first sub message here
/// · │─ sub_msg2: second sub message here
/// · ╰─ hint: hint message here
///
/// SyntaxError: cannot assign to 100
///
/// ```
pub trait ErrorDisplay {
fn core(&self) -> &ErrorCore;
fn input(&self) -> &Input;
/// The block name the error caused.
/// This will be None if the error occurred before semantic analysis.
fn caused_by(&self) -> &str;
/// the previous error that caused this error.
fn ref_inner(&self) -> Option<&Self>;
fn write_to_stderr(&self) {
let mut stderr = stderr();
self.write_to(&mut stderr)
}
fn write_to<W: std::io::Write>(&self, w: &mut W) {
let mut writer = BufWriter::new(w);
writer.write_all(self.show().as_bytes()).unwrap();
writer.flush().unwrap();
if let Some(inner) = self.ref_inner() {
inner.write_to_stderr()
}
}
fn show(&self) -> String {
let core = self.core();
let (color, mark) = core.specified_theme();
let (gutter_color, chars) = core.theme.characters();
let mut msg = String::new();
msg += &core.fmt_header(color, self.caused_by(), self.input().enclosed_name());
msg += "\n\n";
for sub_msg in &core.sub_messages {
msg += &sub_msg.format_code_and_pointer(self, color, gutter_color, mark, chars);
}
msg += &core.kind.to_string();
msg += ": ";
msg += &core.main_message;
msg += "\n\n";
msg
}
/// for fmt::Display
fn format(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let core = self.core();
let (color, mark) = core.specified_theme();
let (gutter_color, chars) = core.theme.characters();
write!(
f,
"{}\n\n",
core.fmt_header(color, self.caused_by(), self.input().enclosed_name())
)?;
for sub_msg in &core.sub_messages {
write!(
f,
"{}",
&sub_msg.format_code_and_pointer(self, color, gutter_color, mark, chars)
)?;
}
write!(f, "{}\n\n", core.main_message)?;
if let Some(inner) = self.ref_inner() {
inner.format(f)
} else {
Ok(())
}
}
}
#[macro_export]
macro_rules! impl_display_and_error {
($Strc: ident) => {
impl std::fmt::Display for $Strc {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
$crate::error::ErrorDisplay::format(self, f)
}
}
impl std::error::Error for $Strc {}
};
}
pub trait MultiErrorDisplay<Item: ErrorDisplay>: Stream<Item> {
fn fmt_all_stderr(&self) {
for err in self.iter() {
err.write_to_stderr();
}
}
fn fmt_all(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
for err in self.iter() {
err.format(f)?;
}
write!(f, "")
}
}